Single Package Vertical Air Conditioning System
9-18K
24K
A Series (Electronic Controls)
L-B Suffix, R410A Models
V(E, H)A09K25L-*
V(E, H)A12K25L-*
V(E, H)A18K25L-*
V(E, H)A24K25L-*
V(E, H)A24K75L-*
V(E, H)A09K34L-*
V(E, H)A09K50L-*
V(E, H)A12K50L-*
V(E, H)A18K50L-*
V(E, H)A24K50L-*
V(E, H)A12K34L-*
V(E, H)A18K34L-*
V(E, H)A24K34L-*
V(E, H)A24K10L-*
*Last Character May Vary
VPK-ServMan-L (4-11)
IMPORTANT SAFETY INFORMATION
The information contained in this manual is intended for use by a qualified service technician who is familiar
with the safety procedures required for installation and repair, and who is equipped with the proper tools and
test instruments required to service this product.
Installation or repairs made by unqualified persons can result in subjecting the unqualified person making
such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical
shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
warnings to guard against any bodily injury or property damage which may result to you or others.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read,
understand and obey all safety messages.
This is a safety Alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol with the word “WARNING”
or “CAUTION”. These words mean:
You can be killed or seriously injured if you do not follow instructions.
WARNING
You can receive minor or moderate injury if you do not follow instructions.
CAUTION
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury,
and tell you what will happen if the instructions are not followed.
A message to alert you of potential property damage will have the
word “NOTICE”. Potential property damage can occur if instructions
are not followed.
NOTICE
PERSONAL INJURY OR DEATH HAZARDS
ELECTRICAL HAZARDS:
•
Unplug and/or disconnect all electrical power to the unit before performing inspections,
maintenance, or service.
•
•
•
Make sure to follow proper lockout/tag out procedures.
Always work in the company of a qualified assistant if possible.
Capacitors, even when disconnected from the electrical power source, retain an electrical charge
potential capable of causing electric shock or electrocution.
•
•
Handle, discharge, and test capacitors according to safe, established, standards, and approved
procedures.
Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary
to test or troubleshoot equipment with the power on to the unit.
2
•
•
Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel,
and sleeve on the room side of the air conditioning unit while cleaning.
Electrical component malfunction caused by water could result in electric shock or other electrically
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.
•
•
•
•
•
Never operate the A/C unit with wet hands.
Use air conditioner on a single dedicated circuit within the specified amperage rating.
Use on a properly grounded electrical circuit only.
Do not use extension cords with the unit.
Follow all safety precautions and use proper and adequate protective safety aids such as: gloves,
goggles, clothing, adequately insulated tools, and testing equipment etc.
•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
REFRIGERATION SYSTEM HAZARDS:
•
•
•
Use approved standard refrigerant recovering procedures and equipment to relieve pressure before
opening system for repair.
Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor
to moderate injury.
Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s flame or hot
surfaces can cause serious burns.
•
•
•
Make sure to protect personal and surrounding property with fire proof materials.
Have a fire extinguisher at hand while using a torch.
Provide adequate ventilation to vent off toxic fumes, and work with a qualified assistant whenever
possible.
•
•
•
Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for
leaks, flushing etc.
Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves,
safety glasses, clothing etc.
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
MECHANICAL HAZARDS:
•
Extreme care, proper judgment and all safety procedures must be followed when testing,
troubleshooting, handling, or working around unit with moving and/or rotating parts.
•
Be careful when, handling and working around exposed edges and corners of sleeve, chassis, and
other unit components especially the sharp fins of the indoor and outdoor coils.
•
•
Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
3
PROPERTY DAMAGE HAZARDS
FIRE DAMAGE HAZARDS:
•
•
•
•
•
Read the Installation/Operation Manual for this air conditioning unit prior to operating.
Use air conditioner on a single dedicated circuit within the specified amperage rating.
Connect to a properly grounded electrical circuit only.
Do not use extension cords with the unit.
Failure to follow these instructions can result in fire and minor to serious property damage.
WATER DAMAGE HAZARDS:
•
Improper installation maintenance, or servicing of the air conditioner unit, or not following the above
Safety Warnings can result in water damage to personal items or property.
•
•
•
Insure that the unit is level to allow water to drain from the unit.
Do not drill holes in the bottom of the drain pan or the underside of the unit.
Failure to follow these instructions can result in result in damage to the unit and/or minor to serious
property damage.
INTRODUCTION
This service manual is designed to be used in conjunction with the installation manuals provided with each unit.
This service manual was written to assist the professional HVAC service technician to quickly and accurately
diagnose and repair any malfunctions of this product.
This manual, therefore, will deal with all subjects in a general nature. (i.e. All text will pertain to all models).
IMPORTANT:
It will be necessary for you to accurately identify the unit you are
servicing, so you can be certain of a proper diagnosis and repair.
(See Unit Identification.)
4
Model Identification Guide
MODEL NUMBER
V
E
A
18 K 50 RT L-B
L; MARKETING SUFFIX
SERIES
Indicates Modification (subject to change)
V=Vertical Series
B; ENGINEERING SUFFIX
Indicates Modification (subject to change)
E=Cooling with or without electric heat
H=Heat Pump
DESIGN SERIES
A = 32" and 47" Cabinet
RT = Standard Wired Remote
T-stat Operation
NOMINAL CAPACITY
A-Series (Btu/h)
09 = 9,000
12 = 12,000
18 = 18,000
ELECTRIC HEATER SIZE
A-Series
00 = No electric heat
25 = 2.5 KW
34 = 3.4 KW
50 = 5.0 KW
24 = 24,000
75 = 7.5 KW
VOLTAGE
10 = 10 KW
K = 208/230V-1Ph-60Hz
VPAK Serial Number Identification Guide
SERIAL NUMBER
A
A
A
N
00001
YEAR MANUFACTURED
PRODUCTION RUN NUMBER
AK = 2010 AE = 2015
AA = 2011 AF = 2016
AB = 2012 AG = 2017
PRODUCT LINE
N = VPAK
AD = 2014 AJ = 2019
MONTH MANUFACTURED
A = Jan
B = Feb
C = Mar
D = Apr
E = May
F = Jun
G = Jul
H = Aug
J = Sep
K = Oct
L = Nov
M = Dec
Sample Nameplate (see your chassis nameplate)
120524
COOLING EQUIPMENT
FOLLOWING ITEMS
OUTDOOR GRILLE
INDOOR GRILLE
5
ELECTRICAL REQUIREMENTS
WARNING
ELECTRIC SHOCK HAZARD
NOTICE
Turn off electric power before service or instal-
lation. All electrical connnections and wiring
MUST be installed by a qualified electrician and
conform to the National Electrical Code and all
local codes which have jurisdiction. Failure to
do so can result in personal injury and/or death.
Not following the previous WARNING could result
in fire or electrically unsafe conditions which could
cause moderate or serious property damage.
Read, understand and follow the previous warning.
Wire Size
“Use ONLY time delayed fused disconnect or HACR type circuit breaker as indicated on the unit’s rating plate. Proper
current protection to the unit is the responsibility of the owner”.
Unit MUST
All 208/230v chassis must be hard wired with properly sized breaker. See nameplate for specific chassis electrical
Use HACR type breakers to avoid
requirements. See below for unit wiring. For wall thermostat wiring, see page 12.
nuisance trips. All field wiring must be done in accordance with NEC and local codes.
Supply voltage
Supply voltage to the unit should be a nominal 208/230 volts. It must be between 197 volts and 253 volts. Supply voltage to
the unit should be checked WITH THE UNIT IN OPERATION. Voltage readings outside the specified range can be expected
to cause operating problems. Their cause MUST be investigated and corrected.
For VPAK Cool with Electric Heat 9-18K
Electrical Data
VEA09K
3400/2780
230/208
VEA12K
3400/2780
230/208
VEA18K
3400/2780
230/208
Heater Watts 2500/2050
Voltage
5000/4090
2500/2050
5000/4090
2500/2050
5000/4090
Heating BTU/h 8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900
Heating Current (Amps)
Minimum Circuit Ampacity
Branch Circuit Fuse (Amps)
LRA - Compressor (Amps)
Cooling Current (Amps)
Basic heater Size
10.9/9.9
15
14.8/13.4
19.9
21.7/19.7
28.6
10.9/9.9
15
14.8/13.4
19.9
21.7/19.7
28.6
10.9/9.9
15
14.8/13.4
19.9
21.7/19.7
28.6
15
20
30
15
20
30
15
20
30
22
22
22
30
30
30
42
42
42
4.2/4.4
2.5 Kw
4.2/4.4
3.4 Kw
HARD WIRED
4.2/4.4
5.0 Kw
5.2/5.4
2.5 Kw
5.2/5.4
3.4 Kw
HARD WIRED
5.2/5.4
5.0 Kw
8.1/8.6
2.5 Kw
8.1/8.6
3.4 Kw
HARD WIRED
8.1/8.6
5.0 Kw
Power Connection
Recommended Branch
Circuit Wire Sizes **
14
12
10
14
12
10
14
12
10
* AWG-American Wire Gauge
For VPAK Heat Pumps 9-18K
Electrical Data
VHA09K
3400/2780
230/208
VHA12K
3400/2780
230/208
VHA18K
3400/2780
208/230
Heater Watts 2500/2050
Voltage
5000/4090
2500/2050
5000/4090
2500/2050
5000/4090
Heating BTU/h 8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900
Heating Current (Amps)
Minimum Circuit Ampacity
Branch Circuit Fuse (Amps)
LRA - Compressor (Amps)
Cooling Current (Amps)
Basic heater Size
10.9/9.9
15
14.8/13.4
19.9
21.7/19.7
28.6
10.9/9.9
15
14.8/13.4
19.9
21.7/19.7
28.6
10.9/9.9
15
14.8/13.4
19.9
21.7/19.7
28.6
15
20
30
15
20
30
15
20
30
18.5
18.5
18.5
26
26
26
42
42
42
4.1/4.3
2.5 Kw
4.1/4.3
3.4 Kw
HARD WIRED
4.1/4.3
5.0 Kw
5.3/5.5
2.5 Kw
5.3/5.5
3.4 Kw
HARD WIRED
5.3/5.5
5.0 Kw
8.2/8.6
2.5 Kw
8.2/8.6
3.4 Kw
HARD WIRED
8.2/8.6
5.0 Kw
Power Connection
Recommended Branch
Circuit Wire Sizes
14
12
10
14
12
10
14
12
10
* AWG-American Wire Gauge
6
For VPAK Cool with Electric Heat 24K
For VPAK Heat Pumps 24K
Electrical Data
VEA24K
VHA24K
Heater Watts 2500/2050
3400/2780
5000/4090
230/208
7500/6135
10000/8180
2500/2050
3400/2780
5000/4090
230/208
7500/6135
10000/8180
Voltage
Heating BTU/h 8500/7000
11600/9500 17000/13900 25598/20939 34130/27918 8500/7000
11600/9500 17000/13900 25598/20939 34130/27918
Heating Current (Amps)
10.9/9.9
14.8/13.4
22.1/20.3
25
21.7/19.7
30.7/28.1
30
32.6/29.5
44.3/40.3
45
43.5/39.3
57.9/52.7
60
10.9/9.9
17.2/15.9
25
14.8/13.4
22.1/20.3
25
21.7/19.7
30.7/28.1
30
32.6/29.5
44.3/40.3
45
43.5/39.3
57.9/52.7
60
Minimum Circuit Ampacity 17.2/15.9
Branch Circuit Fuse (Amps)
LRA - Compressor (Amps)
Cooling Current (Amps)
Basic heater Size
25
34.8
34.8
34.8
34.8
34.8
34.8
34.8
34.8
34.8
34.8
10.0/10.4
2.5 Kw
10.0/10.4
3.4 Kw
10.0/10.4
5.0 Kw
10.0/10.4
7.5 Kw
10.0/10.4
10.0 Kw
10.6/10.9
2.5 Kw
10.6/10.9
3.4 Kw
10.6/10.9
5.0 Kw
10.6/10.9
7.5 Kw
10.6/10.9
10.0 Kw
Power Connection
HARD WIRED
HARD WIRED
Recommended Branch
**Circuit Wire Sizes* AWG -
American Wire Gauge
10
10
10
6
4
10
10
10
6
4
Chassis Specifications
Model 2011
VEA09K VEA12K VEA18K VEA24K
VHA09K VHA12K VHA18K VHA24K
COOLING DATA
COOLING BTUh
9400/9000 11500/11200 17000/16500 23000/22700
9200/9000 11500/11200 17000/16800 23000/22800
POWER (W)
959
9.8/9.8
0.74
1173
9.8/9.8
0.72
1888
9.0/9.0
0.70
2421
9.5/9.5
0.70
939
9.8/9.8
0.74
1186
9.7/9.7
0.72
1868
9.1/9.1
0.70
2527
9.1/9.1
0.70
EER
SENSIBLE HEAT RATIO
HEAT PUMP DATA
HEATING BTUh
N/A
N/A
N/A
N/A
8500
3.0
10800
3.0
16000
3.0
20000
3.0
COP @ 47F
HEATING POWER (W)
HEATING CURRENT (A)
ELECTRICAL DATA
VOLTAGE (1 PHASE, 60 Hz)
VOLT RANGE
830
3.6
1055
4.9
1563
7.5
1953
9.4
230/208
253-198
4.2/4.4
19.8
230/208
253-198
5.2/5.4
30
230/208
253-198
8.1/8.5
42
230/208
253-198
10.0/10.4
34.8
230/208
253-198
4.1/4.3
18.5
230/208
253-198
5.3/5.5
26
230/208
253-198
8.2/8.5
42
230/208
253-198
10.6/10.8
34.8
COOLING CURRENT (A)
AMPS L.R.
AMPS F.L.
3.5
4.5
7.8
9.5
3.5
5
7.8
9.5
INDOOR MOTOR (HP)
INDOOR MOTOR (A)
OUTDOOR MOTOR (HP)
OUTDOOR MOTOR (A)
AIRFLOW DATA
INDOOR CFM*
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1.2
1.2
1.2
1.94
1.2
1.2
1.2
1.94
N/A
1/4
N/A
1/4
N/A
0.85
N/A
0.85
300
60
350
60
450
60
610
60
300
60
420
60
450
60
610
60
VENT CFM
MAX. ESP
.3"
.3"
.3"
.4"
.3"
.3"
.3"
.4"
PHYSICAL
DIMENSIONS (W x D x H)
NET WEIGHT (LBS)
SHIPPING WEIGHT (LBS)
R410A CHARGE (oz)
23x23x32
114
23x23x32
124
23x23x32
144
23x23x47
167
23x23x32
114
23x23x32
125
23x23x32
144
23x23x47
167
125
135
155
220
125
135
155
220
33.5
35.5
48
65
39
42
52
74
* Normal Value Wet Coil @ .1"ESP.
7
TECHNICAL SERVICE DATA
Cooling Performance Data
INDOOR COIL
TEMPERATURE
º F
ELECTRICAL
RATINGS
OPERATING
PRESSURES
Refrigerant
Charge
OUTDOOR COIL Discharge Line Suction Line
SERVICE DATA
Cooling¹
TEMPERATURE
º F
Temperature
º F
Temperature Super Heat Sub-Cooling
º F
Temperature
Voltage
Amps Supply Air
Suction Discharge R-410A - Oz.
Drop
22
VEA09K**RTL
VEA12K**RTL
VEA18K**RTL
VEA24K**RTL
VHA09K**RTL
VHA12K**RTL
VHA18K**RTL
VHA24K**RTL
230/208
230/208
230/208
230/208
230/208
230/208
230/208
230/208
4.2
5.2
58
57
55
55
57
55
51
51
118
116
127
125
117
119
129
128
156
158
180
170
155
165
190
174
66
59
60
61
62
65
60
60
9
24
17
28
34
20
23
35
32
151
141
135
135
155
145
133
140
389
396
455
440
405
450
465
480
33.5
32.0
48.0
65.0
39.0
42.0
45.0
74.0
23
12
12
10
12
15
14
12
8.1
25
10.0
4.1
25
23
5.3
25
8.2
10.6
29
29
¹Test Conditions: 80º F, Room Air Temperature with 50% Relative Humidity, and 95º F, Outdoor Air Temperature with 40% Relative Humidity
**Denotes Heater KW - Numbers Vary
Extended Cooling Performance Data
VEA - EXTENDED COOLING PERFORMANCE
OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.)
85 95 105
INDOOR WET BULB TEMP. (DEGREES F AT 80 F D.B.)
67 62 72 67 62 72 67
75
67
110
67
Model #
VEA09
72
62
72
62
72
62
BTUh
WATTS
AMPS
SHR
11054 10631 9842 10528 9926 9156 10114 9400 8319 9475 8413 7417 8954 7835 6914
783
3.5
0.51
795
3.5
0.69
804
3.5
0.93
853
3.7
0.52
861
3.8
0.71
872
3.8
0.95
959
4.2
0.52
959
4.20
0.74
959
4.2
0.95
1037 1036 1039 1084 1083 1087
4.5
4.5
4.5
4.7
0.55
4.7
0.81
4.7
0.95
0.53
0.78
0.96
BTUh
WATTS
AMPS
SHR
BTUh
WATTS
AMPS
SHR
BTUh
WATTS
AMPS
SHR
13524 13007 12041 12880 12144 11201 12374 11500 10178 11592 10293 9074 10954 9585 8458
957
4.3
0.49
972
4.3
0.67
983
4.4
0.90
1043 1053 1066 1173 1173 1173 1268 1267 1270 1325 1325 1330
VEA12
VEA18
VEA24
4.6
4.7
4.7
5.2
5.20
0.72
5.2
5.6
5.6
5.6
5.9
5.9
5.9
0.50
0.70
0.92
0.51
0.92
0.52
0.76
0.93
0.53
0.79
0.93
19992 19227 17799 19040 17952 16558 18292 17000 15045 17136 15215 13413 16193 14170 12504
1541 1565 1582 1678 1695 1716 1888 1888 1888 2041 2039 2045 2133 2132 2140
6.7
0.48
6.7
0.65
6.8
0.88
7.2
0.49
7.2
0.68
7.3
0.89
8.1
0.49
8.10
0.70
8.1
0.90
8.7
0.50
8.7
0.74
8.7
0.90
9.1
0.52
9.1
0.76
9.1
0.9
27048 26013 24081 25760 24288 22402 24748 23000 20355 23184 20585 18147 21908 19171 16917
1976 2007 2029 2152 2174 2201 2421 2421 2421 2617 2615 2622 2736 2735 2744
8.3
0.48
8.3
0.65
8.4
0.88
8.9
0.49
9.0
0.68
9.0
0.89
10.0 10.00 10.1
0.49 0.70 0.9
10.8
0.5
10.8
0.74
10.8
0.9
11.3
0.52
11.3
0.76
11.3
0.9
RATING POINT
ARI 310/380
VHA - EXTENDED COOLING PERFORMANCE
OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.)
85 95 105
INDOOR WET BULB TEMP. (DEGREES F AT 80 F D.B.)
67 62 72 67 62 72 67
75
110
67
Model #
72
67
62
72
62
72
62
BTUh
WATTS
AMPS
SHR
BTUh
WATTS
AMPS
SHR
BTUh
WATTS
AMPS
SHR
BTUh
WATTS
AMPS
SHR
10819 10405 9632 10304 9715 8961 9899 9200 8142 9274 8234 7259 8763 7668 6767
766
3.4
0.51
778
3.4
0.69
787
3.5
0.93
835
3.7
0.52
843
3.7
0.71
854
3.7
0.95
939
4.1
0.52
939
4.10
0.74
939
4.1
0.95
1015 1014 1017 1061 1061 1064
VHA09
VHA12
VHA18
VHA24
4.4
4.4
4.4
4.6
4.6
4.6
0.53
0.78
0.96
0.55
0.81
0.95
13524 13007 12041 12880 12144 11201 12374 11500 10178 11592 10293 9074 10954 9585 8458
968
4.4
0.49
983
4.4
0.67
994
4.5
0.9
1054 1065 1078 1186 1186 1186 1282 1281 1284 1340 1340 1344
4.7
0.5
4.7
0.7
4.8
0.92
5.3
0.51
5.30
0.72
5.3
0.92
5.7
0.52
5.7
0.76
5.7
0.93
6
0.53
6
0.79
6
0.93
19992 19227 17799 19040 17952 16558 18292 17000 15045 17136 15215 13413 16193 14170 12504
1524 1549 1565 1661 1677 1698 1868 1868 1868 2019 2017 2023 2111 2110 2117
6.8
0.48
6.8
0.65
6.9
0.88
7.3
0.49
7.3
0.68
7.4
0.89
8.2
0.49
8.20
0.70
8.2
0.90
8.8
0.50
8.8
0.74
8.9
0.90
9.2
0.52
9.2
0.76
9.3
0.9
27048 26013 24081 25760 24288 22402 24748 23000 20355 23184 20585 18147 21908 19171 16917
2062 2095 2118 2247 2269 2297 2527 2527 2527 2732 2729 2737 2856 2854 2864
8.8
0.48
8.8
0.65
8.9
0.88
9.4
0.49
9.5
0.68
9.5
0.89
10.5 10.60 10.7
0.49 0.70 0.90
11.4
0.50
11.4
0.74
11.4
0.90
11.9
0.52
11.9
0.76
12
0.9
RATING POINT
ARI 310/380
8
ELECTRONIC CONTROL BOARD FEATURES
The new Friedrich Vert-I-Pak has state of the art features to improve guest comfort and conserve energy. Through
the use of specifically designed control software, Friedrich has accomplished what other Manufacturer’s have only
attempted – a quiet, dependable, affordable and easy to use Vert-I-Pak.
Below is a list of standard features on every Friedrich VPAK and their benefit to the owner.
The fan start and stop delays prevent abrupt changes in room acoustics due to the compressor energizing
Quiet Start/Stop
Fan Delay
or stopping immediately. Upon call for cooling or heating the unit fan will run for five seconds prior to en-
ergizing the compressor. Also, the fan off delay allows for “free cooling” by utilizing the already cool indoor
coil to its maximum capacity by running for 30 seconds after the compressor.
Remote Thermostat
Operation
VPAK units are controlled by a wired remote wall thermostat.
The new Friedrich digital VPAK features a self diagnostic program that can alert maintenance to compo-
nent failures or operating problems. The internal diagnostic program saves properties valuable time when
diagnosing running problems.
Internal Diagnostic
Program
The self diagnosis program will also store error codes in memory if certain conditions occur and correct
themselves such as extreme high or low operating conditions or activation of the room freeze protection
feature. Storing error codes can help properties determine if the unit faced obscure conditions or if an error
occurred and corrected itself.
Service Error Code
Storage
Multiple compressors starting at once can often cause electrical overloads and premature unit failure.
The random restart delay eliminates multiple units from starting at once following a power outage or initial
power up. The compressor delay will range from 180 to 240 seconds.
Random
Compressor Restart
Heat Pump Units
Digital Defrost
Thermostat
The new Friedrich VPAK uses a digital thermostat to accurately monitor the outdoor coil conditions to allow
the heat pump to run whenever conditions are correct. Running the VPAK in heat pump mode save energy
and reduces operating costs. The digital thermostat allows maximization of heat pump run time.
Heat pump models will automatically run the electric heater during compressor lock-out to quickly provide
heat when initially energized, then return to heat pump mode. This ensures that the room is heated quickly
without the usual delay associated with heat pump units.
Instant Heat
Heat Pump Mode
The room air sampling feature maintains a balanced temperature throughout the room by circulating the
air for 90 seconds once every 9 minutes that the unit is not running when it is set to cooling or heating
mode. By circulating the air, the unit can detect hot or cold areas in the room and operate the unit to cool
or warm the room as necessary. This function is only available when the fan mode is set to ‘AUTO’ during
COOL or HEAT Mode.
Room Air
Sampling Feature
All electronic VPAK units have low voltage terminals ready to connect a desk control energy management
system. Controlling the unit’s on/off operation from a remote location like the front desk can reduce energy
usage and requires no additional accessories at the VPAK.
Desk Control Ready
The frost sensor protects the compressor from damage in the event that airfl ow is reduced or low outdoor
temperatures cause the indoor coil to freeze. When the indoor coil reaches 30°F the compressor is
diabled and the fan continues to operate based on demand. Once the coil temperature returns to 45°F the
compressor returns to operation.
Indoor Coil Frost
Sensor
The VPAK features a 24V AC terminal for connection to a relay that may be used to operate an auxiliary
fan to transfer air to adjoining rooms. Auxiliary fans can provide air conditioning to odd shaped rooms.
Auxiliary Fan Ready
9
Note: Unit is operated by a wired remote wall t-stat which is connected to an electronic control board
at the VPAK unit.
(Compressor Heat)
Heat / Cool Units
set point of the t-stat
if
The
Heat Mode in Cool with Electric Heat Units
When the t-stat is in the Heat Mode, if the indoor ambient temperature is below the heat set point, the fan turns on
5 seconds prior then the electric heat will turn on. When the t-stat is satisfied, the electric heat will turn off. The fan
turns off 15 seconds later.
Heat Pump With Electric Heat Operation
This heating has two heating methods. If the ambient indoor temperature is below the heat set point and the
compressor is not locked out, the compressor turns on. If the ambient temperature rises above the t-stat’s heat set
point, the compressor turns off.
If the Compressor is Locked Out on the 3 Minute Time Delay and Electric Heat is Available
1. The control turns on the electric heat until the compressor is not locked out.
2. After lockout, the control turns off the electric heat, waits 5 seconds, then turns on the compressor.
(The wired remote wall t-stat’s time delay may override this feature).
Condition 1
Thereafter, the unit will switch back to Heat Pump heat until the outdoor coil temperature sensor rises to
45 or greater.
10
Compressor Lock Out Time
The lockout feature ensures that the compressor is de-energized for a period of time. The timer varies randomly
from 180 to 240 seconds
The compressor lockout is initiated every time the compressor is “off” due to:
(1) Satisfying the T-stat temperature set point
(2) Changing mode to fan only or heat
(3) Turning the unit off
(4) Power is restored after failure
(5) Line power is restored from a brown out condition
Cooling Fan Delay
This is only for t-stat Fan Auto Mode only.
When unit cycles cooling ON – starts the fan 5 seconds EARLY. When unit cycles cooling OFF – DELAYS the fan
off for 30 seconds
Heating Fan Delay
This is only for Fan Auto Mode (Fan cycles with cool/heat operation) and not for continuous fan mode. When unit
cycles Heating ON – starts the fan 5 seconds EARLY. When unit cycles Heating OFF – DELAYS the fan off for 15
seconds.
Continuous fan operation enables fan to run continuously.
Fan Speed Change Delay
Relay activation is delayed by a minimum number of seconds. The default for this value is 2 seconds and is used to
eliminate relay chatter.
RoomAirSamplingFeature
The room air sampling feature maintains a balanced temperature throughout the room by circulating the air for 90
seconds once every 9 minutes that the unit is not running when it is set to cooling or heating mode. By circulating
the air, the unit can detect hot or cold areas in the room and operate the unit to cool or warm the room as neces-
sary. This function is only available when the fan mode is set to ‘AUTO’ during COOL or HEAT Mode.
11
Low Voltage Interface Connections
Thermostat Selection
Friedrich recommends the use of the Friedrich RT4 and RT6. These
thermostats are single stage heat/cool, manual changeover. The RT4 is a
digital display thermostat with single speed fan control. The RT6 features
a digital display, two fan speed selection, temperature limiting, status
indicator light, room temperature offset, and backlight. Other thermostats
All Vert-I-Pak units have a low voltage interface connector through
which a Remote Wall Thermostat, Desk Control and Auxiliary Fan’s
Relay can be connected. The interface connector is located on the
electronic control board.
and are
may be used as long as they are single stage heat/cool
Figure 1
Interface Connector Location
configured correctly for the unit.
Thermostat terminals requirements:
.
For cooling with electric heat units: C, R, G, Y, W.
For heat pump units: C, R, G, Y, W, B.
For two fan speeds, thermostat must have 2 fan speed selection.
HEAT PUMP UNITS
During Heat Mode:
The B terminal must be continuously energized. The W terminal must have
24 VAC output to call for heat. The control board decides on whether to
turn on the Heat Pump Heat (compressor) or Electric Heat. The Y terminal
should not have 24 VAC output during heat mode.
Connecting a Remote Wall
Thermostat
Questions concerning proper connections to the unit should be dirrected
to the factory.
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
Table 1
Interface Connector Definitions
Factory use only.
(Ensure there is no jumper at FP an F2)
FP
Used with F1 to provide 24 VAC to external
fan relay. (Ensure there is no jumper at FP an F2)
F2
Used with F2 to provide 24 VAC to
external fan relay.
F1
Used with D1 for desk control on or off
D2
D1
operation.
Used with D2 for desk control on or off
operation.
Common Ground Terminal
Call for high fan
C
GH
GL
B
Call for low fan
Connect the thermostat using Figure 1 and Table 1 as a guide.
Call for heat pump reversing valve
Call for compressor
Procedure (Ensure there is no jumper wire at FP and F2)
1) Disconnect power to the unit.
Y
W
Call for heating
2) Unscrew and remove the electrical control box’s cover.
3) Locate the Interface Connector (24 VAC terminal strip (See figure 1 at left).
R
24V Power from Electronic Control to Wall
4) Make the wire connections according to the configuration needed for
your unit (see above or page 40 for wiring diagrams). Use #18 gauge wire size.
Remote Wall Thermostat
5) Once each wire is matched and connected, the unit is now ready to be
controlled by the thermostat.
All Friedrich Vert-I-Pak units are factory configured to be controlled by
using a single stage heat/cool remote wired wall mounted thermostat.
6) Reattach the electrical control box’s cover.
12
SERVICE
Remote Wall Thermostat Location
The thermostat should not be mounted where it may be affected by drafts,
discharge air from registers (hot or cold), or heat radiated from the sun
appliances, windows etc.. The thermostat should be located about 5 Ft.
above the floor in an area of average temperature, with good air circulation.
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
Mercury bulb type thermostats MUST be level to control temperature
accurately to the desired set-point. Electronic digital type thermostats
should be level for aesthetics.
Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.
Failure to do so could result in serious injury or
death.
CAUTION
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in minor to
moderate injury.
Servicing / Chassis Quick Changeouts
Note: An improperly operating or poorly located remote wall thermostat
can be the source of perceived equipment problems. A careful check of the
thermostat’s location and wiring must be made then to ensure that it is not
the source of problems.
.
Desk Control
To Remove the Chassis from the Closet:
A. Disconnect the power coming into the unit from the main
breaker panel or the closet mounted disconnect.
B. Switch the wall Thermostat off.
The unit’s electronic control has built-in provisions for connection to an
external switch to control power to the unit. The switch can be a central
desk control system or even a normally open door switch.
C. Pull the Power Disconnect located in the front of the chassis.
D. Disconnect the electrical connection.
E. Disconnect the duct work.
For desk control operation, connect one side of the switch to the D1
terminal and the other to the D2 terminal (See page 12). Whenever the
switch closes, the unit operation will stop.
F. Disconnect condensate drain on 9-18,000 BTU models.
G. Slide the chassis out of the wall plenum.
H. Lift the chassis out of the utility closet.
Maximum Wire Length for Desk Control Switch
Warranty
Auxiliary Fan Control
The electronic control also has the ability to control a 24 VAC relay to
activate an auxiliary, or transfer fan. The outputs are listed as F1 and F2 on
the interface connector (See page 12).
To connect the relay, simply wire one side of the relay to F1 and the other
side to F2. Anytime that the fan runs, the terminals will send a 24 VAC
signal to the relay. The relay must be 24 VAC, 50mA or less.
Note: The Desk Control, Auxiliary Fan relay and wires must be field supplied.
13
VPAK 9-18K BTU UNITS
COMPONENTS IDENTIFICATION
Blower Wheel and
Heater in here
Air Discharge
Nameplate
10” Duct Collar
Condenser
Heater
Diagnostic
Touch Pad
Pullout
Disconnect
Ground
Compressor
Blower/Fan
Motor Capacitor
Fresh Air
Vent
Evaporator
Coil
Condenser
Coil Thermistor
Air Intake
Compressor
Evaporator
Coil Thermistor
Front Side
Left and Front Sides
Evaporator Coil
Fresh Air
Vent Door
Heater
Blower
Wheel
Condenser
Air Intake
Condenser
Blower/Fan
Motor
Condenser
Fan Shroud
Condenser
Air Discharge
Right Side
Left and Back Sides
14
VPAK 24K BTU UNITS
COMPONENTS IDENTIFICATION
Electric
Control Panel
10” Duct Collar
Air Discharge
Blower Wheel
Return
Air Filter
Electronic
Control Board
Air Intake
Nameplate
Fresh Air
Door Lever
Pull Out
Disconnect
Diagnostic
Touch Pad
Compressor
Contactor
Front Side
Blower Wheel
Compartment
Evaporator Coil
Thermistor
Evaporator Coil
Heater
Capillary Tube
Compressor
Capacitor
Blower/
Condenser
Fan Motor
Capacitor
Condenser
Air Discharge
Compressor
Condenser
Condenser
Shroud
Fresh Air
Door
Condenser
Fan Motor
Left and Back Sides
Right Side
Condenser
Condenser
Fan Blade
Condenser Coil Thermistor
Condensate Drain Hose
15
Error Codes and Alarm Status
Unit Control Panel
The display shown below has four digits. The left two digits indicate the error code # ( 1 to 24 ), The On/Off icons above these
two digits indicate the currents state of the error code. The right two digits show the history count (up to 99) of the associated
error code. The display contains a maintenance icon (wrench) that will illuminate to indicate when the unit needs service.
This wrench indicates an error code # is on (active). To find out which one, check all error codes.
Check Error Codes
1. Press the Enter key to activate the
display.
2. Each press of the scroll key display
the next error code.
Clear History Counters
1. Press & hold the Enter key and the
Scroll Key for 6 seconds.
Error
Code
Problem
Action
1
Front Panel Button Stuck For More Than 20 Seconds
Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch input.
2
3
Input Voltage Out of Specification (187 - 253)
Indoor Temperature Sensor is Open or Shorted
Unit stops, open all relays until voltage is back within specs then resume operation.
Unit defaults to 75°F in COOLING or 68°F in HEATING and will continue to operate
if setting is below 75°F in cool mode or if above 68°F in heat mode.
The unit's control board defaults to 40°F. It will override the sensor and the unit will
continue to operate.
4
Indoor Coil Temperature Sensor is Open or Shorted
The unit defaults to 20°F, overriding the sensor. The unit will continue to operate.
Using Elec Heat if available for HEATING. If not available, it will use HEAT PUMP if
the outdoor temperature allows.
The unit will shut down for 5 minutes. resume operation for 3 minutes. If test fails 3
times, the unit operation is locked out. See troubleshooting page 42. To reset,
turn power off and on.
5
6
Outdoor Coil Temperature Sensor is Open or Shorted
Outdoor Coil > (grater than) 175 F
The compressor will turn off and the High Fan speed will run. When coil temp reachs
45°F the unit will resume operation after lockout time.
The unit will continue to operate and be monitored.
The unit will continue to operate and be monitored.
Not Applicable
7
8
9
Indoor Coil < (less than) 30 F for 2 consecutive minutes
Unit Cycles > (greater than) 9 Times per hour
Unit Cycles < (less than) 3 Times per Hour
Not Applicable
10
11 WallStat Problem or Connection Issue
12 Not Applicable
The unit will not operate.
Not Applicable
If unit is cooling or heat pump is on, shut down compressor. Run high fan until
switch closes, then resume operation. The third occurance in 1 hour locks unit out.
Applicable to 24K unit only. To reset, turn power off and on.
VPAK 24K Unit Only
13 High Pressure Limit Switch is Open
14 Not Applicable
Not Applicable
If indoor coil temperature is less than ambient temperature for 3 minutes, the unit will
use electric heat to satisfy the heating demand. Causes could be bad reversing
valve, heat load too high.
15 Heat Pump Error
Occurs if the indoor ambient temperature range falls below 0°F or greater than 130°F. The
error code will remain on until the temperature reaches the operating range and then
the unit will return to normal operation.
16 Temperature beyond operating limits
17
18
19
20
21
Equipment Doesn't Meet Minimum Configuration
Not Applicable
Not Applicable
Not Applicable
Not Applicable
The compressor must be enabled and have at least 2 fan speeds.
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Unit will use electric heat to satisfy heating demands until the temperature equals or
exceeds 45°F. Applicable for Heat Pump models only.
(Not an error code)
Outdoor Coil Temperature < 30 F for 2 consecutive minutes
22
Not Applicable
Not Applicable
Not Applicable
Not Applicable
23
24
16
COMPONENTS TESTING
Testing the Diagnostic Service Module
Testing the Electronic Control Board
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Failure to do so could result in serious injury or
death.
If the Diagnostic Service Module does not turn on:
1. Make sure there is 208/230 VAC to the unit and that it is turned on.
2. Disconnect the diagnostic service module’s wire harness on the control board.
3. Using a voltmeter, check the first two pins to the left of the female connector (see picture below). There
should be up to 5VDC.
4. If there is no voltage, replace the electronic control board.
5. If there is voltage, check the wire harness and connections at the electronic control board and the diagnostic
service module.
6. If the connections and the wire harness are good, replace the diagnostic service module.
Diagnostic Service Module
Service Module Connector
Test here up to 5VDC.
If no voltage, replace board.
If there is 5VDC, check connections
and cable. If OK, replace service module.
17
ELECTRONIC CONTROL BOARD COMPONENTS IDENTIFICATION
AND TESTING (Continued) (See wiring diagrams pages 41-46)
VPAK 24K
Front
Back
High Pressure Switch
Not Used
Reversing Valve
Not Used
(Blue)
(Green)
Not Used
Not Used
High Speed
Not Used
Low Speed
Transformer
115/230 Volts
Diagnostic
Service Module
Not Used
T-stat Terminals
Transformer voltage
Selector Switch
115/230 Volts
Ensure it is set at
230VAC
FP F2 F1 D2 D1 C GHGL
B
Y
W
R
Fuse 10 Amps
250 VaC
Low Voltage Interface Connection
Sample board
1. Test for power at L1 and L2 for 208/230 VAC. (Ensure the transformer voltage selector switch is set for 230 VAC)
2. Test the 10 amp/250 VAC fuse for continuity.
FOR THE FOLLOWING TESTS, ENSURE THE UNIT IS IN THE APPROPRIATE SETTINGS FOR THE TEST
BEING PERFORMED. ENSURE THERE ARE NO ERROR CODES ACTIVE.
3. Testing the compressor relay and heat relays:
Test for power in and power out. If there is power in and no power out, replace the electronic control board.
(208/230 to L2)
4. Testing the fan and reversing valve relays:
Test for power at the reversing valve and fan relays 1 or 3. (208/230 to L2)
5. Testing the transformer:
Test the low voltage terminal strip at:
R and C for 24 VAC
F2 and F1 for 24 VAC
D2 and D1 for 24 VAC
Test the service module connector for 5 VDC (see prior page)
Test the connectors for the thermistors for up to 5 VDC
If there is no voltage at any of the above, replace electronic control board.
6. Testing the thermistors:
Disconnect the thermistor and test for resistance value (see page 35)
7. Testing the high pressure switch (VPAK 24K only)
Test for 24 VAC at board, if there is no voltage, replace the electronic control.
Test the pressure switch for continuity, if none, replace it (switch is normally closed)
18
COMPONENTS TESTING (Continued)
BLOWER / FAN MOTOR
Many motor capacitors are internally fused. Shorting the
Asinglephasepermanentsplitcapacitormotorisusedtodrive
the evaporator blower and condenser fan. A self-resetting
overload is located inside the motor to protect against high
temperature and high amperage conditions.
terminals will blow the fuse, ruining the capacitor. A 20,000
ohm 2 watt resistor can be used to discharge capacitors
safely. Remove wires from capacitor and place resistor
across terminals. When checking a dual capacitor with
a capacitor analyzer or ohmmeter, both sides must be
tested.
WARNING
ELECTRIC SHOCK HAZARD
Capacitor Check with Capacitor Analyzer
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
The capacitor analyzer will show whether the capacitor
is “open” or “shorted.” It will tell whether the capacitor
is within its micro farads rating and it will show whether
the capacitor is operating at the proper power-factor
percentage. The instrument will automatically discharge
the capacitor when the test switch is released.
BLOWER / FAN MOTOR TEST
1. Visually inspect the motor’s wiring, housing etc., and
determine that the capacitor is serviceable.
2. Make sure the motor has cooled down.
3. Disconnect the fan motor wires from the control board.
4. Test for continuity between the windings also, test to
ground.
Capacitor Connections
The starting winding of a motor can be damaged by a
shorted and grounded running capacitor. This damage
usually can be avoided by proper connection of the running
capacitor terminals.
5. If any winding is open or grounded replace the motor.
From the supply line on a typical 230 volt circuit, a 115 volt
potential exists from the “R” terminal to ground through a
possibleshortinthecapacitor. However, fromthe“S”orstart
terminal, a much higher potential, possibly as high as 400
volts, exists because of the counter EMF generated in the
start winding. Therefore, the possibility of capacitor failure
is much greater when the identified terminal is connected
to the “S” or start terminal. The identified terminal should
always be connected to the supply line, or “R” terminal,
never to the “S” terminal.
When connected properly, a shorted or grounded running
capacitor will result in a direct short to ground from the “R”
terminal and will blow the line fuse. The motor protector
will protect the main winding from excessive temperature.
CAPACITORS
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before servicing.
Discharge capacitor with a 20,000 Ohm 2 Watt
resistor before handling.
Failure to do so may result in personal injury,
or death.
19
COMPONENTS TESTING (Continued)
HEATER ELEMENTS AND LIMIT SWITCHES’
SPECIFICATIONS
TESTING THE HEATING ELEMENTS AND
LIMIT SWITCHES
All heat pumps and electric heat models are equipped
with a heating element and a limit switch (bimetal ther-
mostat). The limit is in series with the element and will
interrupt the power at a designed temperature.
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
Should the blower motor fail, filter become clogged or air-
flow be restricted etc., the high limit switch will open and
interrupt the power to the heater before reaching an un-
safe temperature condition.
Testing of the heating elements can be made with an
ohmmeter or continuity tester across the terminals after
the power wires have been removed. Test the limit switch
for continuity across its input and output terminals.Test
below the limit switch’s reset temperature.
VPAK 9K, 12K and 18K BTUs Models:
2.5 KW, 230 V, Resistance 18.61 Ohms + - 5%.
Has 1 Limit Switch, Opens at 120° F, Closes at 90° F,
It has a One Time Open Temp. of 145° F.
DRAIN PAN VALVE
3.4 KW, 230 V, Resistance 13.68 Ohms + - 5%.
Has 1 Limit Switch, Opens at 120° F, Closes at 90° F,
It has a One Time Open Temp. of 145° F.
During the cooling mode of operation, condensate which
collects in the drain pan is picked up by the condenser fan
blade and sprayed onto the condenser coil. This assists
in cooling the refrigerant plus evaporating the water.
5 KW, 230 V, Resistance 9.31 Ohms + - 5%.
Has 1 Limit Switch, Opens at 130° F, Closes at 100° F,
It has a One Time Open Temp. of 155° F.
During the heating mode of operation, it is necessary that
water be removed to prevent it from freezing during cold
outside temperatures. This could cause the condenser
fan blade to freeze in the accumulated water and prevent
it from turning.
VPAK 24K BTUs Models:
2.5 KW, 230 V, Resistance 18.61 Ohms + - 5%.
Has 2 Limit Switches, Primary Opens at 155° F,
Closes at 125° F, Secondary’s Open Temp. is 200° F.
To provide a means of draining this water, a bellows type
drain valve is installed over a drain opening in the base
pan.
3.4 KW, 230 V, Resistance 13.68 Ohms + - 5%.
Has 2 Limit Switches, Primary Opens at 155° F,
Closes at 125° F, Secondary’s Open Temp. is 200° F.
This valve is temperature sensitive and will open when
the outside temperature reaches 40°F. The valve will
close gradually as the temperature rises above 40°F to
fully close at 60°F.
5 KW, 230 V, Resistance 9.31 Ohms + - 5%.
Has 2 Limit Switches, Primary Opens at 155° F,
Closes at 125° F, Secondary’s Open Temp. is 200° F.
7.5 KW, 230 V (composed of 2, 3.7 KW Elements)
Each Has a Resistance of 12.41 Ohms + - 5%.
Each Has 2 Limit Switches, Primary Opens at 165° F,
Closes at 135° F With a 1 time Open Temp. of 210° F.
Secondary Limit’s Open Temp. is 200° F.
Bellows Assembly
Drain Pan Valve
10 KW, 230 V (composed of 2, 5 KW Elements)
Each Has a Resistance of 9.31 Ohms + - 5%.
Each Has 2 Limit Switches, Primary Opens at 165° F,
Closes at 135° F With a 1 time Open Temp. of 210° F.
Secondary Limit’s Open Temp. is 200° F.
If outdoor temperature is at 40° F and drain valve does
not open, replace it. (Ensure it is not restricted by debris).
NOTE: Always replace with an exact replacement.
20
External Static Pressure
External Static Pressure can best be defined as the pressure
difference (drop) between the Positive Pressure (discharge)
and the Negative Pressure (intake) sides of the blower.
External Static Pressure is developed by the blower as a
result of resistance to airflow (Friction) in the air distribution
system EXTERNAL to the VERT-I-PAK cabinet.
1. Set up to measure external static pressure at the
supply and return air.
2. Ensure the coil and filter are clean, and that all the
registers are open.
3. Determine the external static pressure with the
blower operating.
Resistance applied externally to the VERT-I-PAK (i.e. duct
work, filters, etc.) on either the supply or return side of the
system causes an INCREASE in External Static Pres-
sure accompanied by a REDUCTION in airflow.
4. Refer to the Air Flow Data for your VERT-I-PAK
system to find the actual airflow for factory-selected
fan speeds.
External Static Pressure is affected by two (2) factors.
5. If the actual airflow is either too high or too low, the
blower speed will need to be changed to appropriate
setting or the ductwork will need to be reassessed
and corrections made as required.
1. Resistance to Airflow as already explained.
2. Blower Speed. Changing to a higher or lower blower
speed will raise or lower the External Static Pressure
accordingly.
6. Select a speed, which most closely provides the
required airflow for the system.
Theseaffectsmustbeunderstoodandtakenintoconsideration
whencheckingExternalStaticPressure/Airflowtoinsurethat
the system is operating within design conditions.
7. Recheck the external static pressure with the
new speed. External static pressure (and actual
airflow) will have changed to a higher or lower value
depending upon speed selected. Recheck the actual
airflow (at this "new" static pressure) to confirm
speed selection.
Operating a system with insufficient or excessive airflow
can cause a variety of different operating problems.
Among these are reduced capacity, freezing evaporator
coils, premature compressor and/or heating component
failures. etc.
8. Repeat steps 8 and 9 (if necessary) until proper
airflow has been obtained.
System airflow should always be verified upon completion
of a new installation, or before a change-out, compressor
replacement, or in the case of heat strip failure to insure
that the failure was not caused by improper airflow.
EXAMPLE: Airflow requirements are calculated as follows:
(Having a wet coil creates additional resistance to airflow.
This addit ional resistance must be taken into consideration
to obtain accurate airflow information.
Determining the Indoor CFM: Chart A – CFM
Model
VEA09/VHA09 VEA12/VHA12 VEA18/VHA18
ESP (") Low
High
385
340
280
190
Low
420
350 *
290
High
470
420 **
350
Low
430
400
340
290
High
480
450
400
330
.00"
.10"
.20"
.30”
340
300
230
140
250
300
Highlighted values indicate rated performance point.
Rated performance for
VEA12
*
Rated Performance for
** VHA12
Model
VEA24/VHA24
ESP (")
.00"
.10"
.20"
.30"
Low
690
610
560
510
450
High
740
700
640
580
520
Checking External Static Pressure
The airflow through the unit can be determined by
measuring the external static pressure of the system, and
consulting the blower performance data for the specific
VERT-I-PAK.
.40"
Highlighted values indicate rated performance point.
21
Correct CFM (if needed):
Chart B – Correction Multipliers
Ductwork Preparation
If flex duct is used, be sure all the slack is pulled out of the
flex duct. Flex duct ESP can increase considerably when
not fully extended. DO NOT EXCEED a total of .30 ESP, as
this is the MAXIMUM design limit for the VERT-I-PAK
A-Series unit.
IMPORTANT: FLEX DUCT CAN COLLAPSE AND
CAUSE AIRFLOW RESTRICTIONS. DO NOT
USE FLEX DUCT FOR: 90 DEGREE BENDS, OR
UNSUPPORTED RUNS OF 5 FT. OR MORE.
Explanation of charts
Chart A is the nominal dry coil VERT-I-PAK CFMs. Chart
B is the correction factors beyond nominal conditions.
Fresh Air Door
The Fresh Air Door is an “intake” system. The fresh air door
opened via a slide on the front of the chassis located just
above the indoor coil. Move the slide left to open and right
to close the fresh air door. The system is capable of up to 60
CFM of fresh air @ ~.3” H20 internal static pressure.
1 ½ TON SYSTEM ( 18,000 Btu)
Operating on high speed @ 230 volts with dry coil
measured external static pressure .10
Air Flow = 450 CFM
Checking Approximate Airflow
If an inclined manometer or Magnehelic gauge is not
available to check the External Static Pressure, or the
blower performance data is unavailable for your unit,
approximate air flow call be calculated by measuring the
temperature rise, then using tile following criteria.
In the same SYSTEM used in the previous example but
having a WET coil you must use a correction factor of
.95 (i.e. 450 x .95=428 CFM) to allow for the resistance
(internal) of the condensate on the coil.
KILOWATTS x 3413
= CFM
It is important to use the proper procedure to check external
Static Pressure and determine actual airflow. Since in
the case of the VERT-I-PAK, the condensate will cause
a reduction in measured External Static Pressure for the
given airflow.
Temp Rise x 1.08
Electric Heat Strips
The approximate CFM actually being delivered can be
calculated by using the following formula:
It is also important to remember that when dealing with
VERT-l-PAK units that the measured External Static
Pressure increases as the resistance is added externally
to the cabinet. Example: duct work, filters, grilles.
DO NOT simply use the Kilowatt Rating of the heater (i.e.
2.5, 3.4, 5.0) as this will result in a less-than-correct airflow
calculation. Kilowatts may be calculated by multiplying
the measured voltage to the unit (heater) times the
measured current draw of all heaters (ONLY) in operation
to obtain watts. Kilowatts are than obtained by dividing
by 1000.
Indoor Airflow Data
The Vert-I-Pak A series units must be installed with a free
return air configuration. The table below lists the indoor
airflow at corresponding static pressures. All units are rarted
at low speed.
EXAMPLE: Measured voltage to unit (heaters) is 230 volts.
Measured Current Draw of strip heaters is 11.0 amps.
The Vert-I-Pak units are designed for either single speed or
two fan speed operation. For single speed operation refer to
the airflow table below and select the most appropriate CFM
based on the ESP level. Connect the fan output from the
thermostat to the unit on either the GL terminal for low speed
or to the GH terminal for high speed operation.
230 x 11.0 = 2530
2530/1000 = 2.53 Kilowatts
2.53 x 3413 = 8635
°
Supply Air
Return Air
95 F
°
75 F
°
Temperature Rise
20
For thermostats with two-speed fan outputs connect the low
speed output to the unit GL terminal and the high speed
output to the GH terminal.
20 x 1.08 = 21.6
8635
= 400 CFM
21.6
22
REFRIGERATION SEQUENCE OF OPERATION
A good understanding of the basic operation of the
refrigeration system is essential for the service technician.
Without this understanding, accurate troubleshooting of
refrigeration system problems will be more difficult and time
consuming, if not (in some cases) entirely impossible. The
refrigeration system uses four basic principles (laws) in its
operation they are as follows:
The refrigerant leaves the condenser Coil through the liquid
line as a warm high pressure liquid. It next will pass through
the refrigerant drier (if so equipped). It is the function of the
driertotrapanymoisturepresentinthesystem,contaminants,
and large particulate matter.
The liquid refrigerant next enters the metering device. The
metering device is a capillary tube. The purpose of the
metering device is to “meter” (i.e. control or measure) the
quantity of refrigerant entering the evaporator coil.
1. “Heat always flows from a warmer body to a cooler
body.”
2. “Heat must be added to or removed from a substance
before a change in state can occur”
In the case of the capillary tube this is accomplished (by
design) through size (and length) of device, and the pressure
difference present across the device.
3. “Flow is always from a higher pressure area to a lower
pressure area.”
Since the evaporator coil is under a lower pressure (due to
the suction created by the compressor) than the liquid line,
the liquid refrigerant leaves the metering device entering the
evaporator coil. As it enters the evaporator coil, the larger
area and lower pressure allows the refrigerant to expand
and lower its temperature (heat intensity). This expansion is
often referred to as “boiling”. Since the unit’s blower is moving
indoor air across the finned surface of the evaporator coil,
the expanding refrigerant absorbs some of that heat. This
results in a lowering of the indoor air temperature, hence the
“cooling” effect.
4. “The temperature at which a liquid or gas changes state
is dependent upon the pressure.”
The refrigeration cycle begins at the compressor. Starting
the compressor creates a low pressure in the suction line
which draws refrigerant gas (vapor) into the compressor.
The compressor then “compresses” this refrigerant, raising
its pressure and its (heat intensity) temperature.
The refrigerant leaves the compressor through the discharge
Line as a hot High pressure gas (vapor). The refrigerant
enters the condenser coil where it gives up some of its
heat. The condenser fan moving air across the coil’s finned
surface facilitates the transfer of heat from the refrigerant to
the relatively cooler outdoor air.
The expansion and absorbing of heat cause the liquid
refrigerant to evaporate (i.e. change to a gas). Once the
refrigerant has been evaporated (changed to a gas), it is
heated even further by the air that continues to flow across
the evaporator coil.
When a sufficient quantity of heat has been removed from
the refrigerant gas (vapor), the refrigerant will “condense”
(i.e. change to a liquid). Once the refrigerant has been
condensed (changed) to a liquid it is cooled even further by
the air that continues to flow across the condenser coil.
The particular system design determines at exactly what
point (in the evaporator) the change of state (i.e. liquid to a
gas) takes place. In all cases, however, the refrigerant must
be totally evaporated (changed) to a gas before leaving the
evaporator coil.
The VPAK design determines at exactly what point (in
the condenser) the change of state (i.e. gas to a liquid)
takes place. In all cases, however, the refrigerant must be
totally condensed (changed) to a Liquid before leaving the
condenser coil.
The low pressure (suction) created by the compressor
causes the refrigerant to leave the evaporator through the
suction line as a cool low pressure vapor. The refrigerant then
returns to the compressor, where the cycle is repeated.
Refrigeration Assembly
1. Compressor
2. Evaporator Coil Assembly
3. Condenser Coil Assembly
4. Capillary Tube
5. Compressor Overload
23
SEALED REFRIGERATION SYSTEM REPAIRS
IMPORTANT
ANY SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.
ALSO, ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER.
EQUIPMENT REQUIRED:
9. High Pressure Gauge - (0 - 750 lbs.)
1. Voltmeter
10. Low Pressure Gauge - (30 - 200 lbs.)
2. Ammeter
11. Vacuum Gauge - (0 - 1000 microns)
3. Ohmmeter
12. Facilities for flowing nitrogen through refrigeration tubing
during all brazing processes.
4. E.P.A. Approved Refrigerant Recovery System
5. Vacuum Pump (capable of 200 microns or less
vacuum.)
EQUIPMENT MUST BE CAPABLE OF:
6. Acetylene Welder
1. Recovering refrigerant to EPA required levels.
7. Electronic Halogen Leak Detector capable of detect-
ing HFC (Hydrofluorocarbon) refrigerants.
2. Evacuation from both the high side and low side of the
system simultaneously.
8. Accurate refrigerant charge measuring device such
as:
3. Introducing refrigerant charge into high side of the
system.
a. Balance Scales - 1/2 oz. accuracy
b. Charging Board - 1/2 oz. accuracy
4. Accurately weighing the refrigerant charge actually
introduced into the system.
Too much refrigerant (overcharge) in the system is just as bad
(if not worse) than not enough refrigerant (undercharge). They
both can be the source of certain compressor failures if they
remain uncorrected for any period of time. Quite often, other
problems (such as low air flow across evaporator, etc.) are
misdiagnosed as refrigerant charge problems. The refrigerant
circuit diagnosis chart will assist you in properly diagnosing
these systems.
WARNING
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
Failure to do so could result in electric shock,
serious injury or death.
An overcharged unit will at times return liquid refrigerant
(slugging) back to the suction side of the compressor eventually
causing a mechanical failure within the compressor. This
mechanical failure can manifest itself as valve failure, bearing
failure, and/or other mechanical failure. The specific type of
failure will be influenced by the amount of liquid being returned,
and the length of time the slugging continues.
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Not enough refrigerant (undercharge) on the other hand, will
cause the temperature of the suction gas to increase to the point
where it does not provide sufficient cooling for the compressor
motor. When this occurs, the motor winding temperature will
increase causing the motor to overheat and possibly cycle open
the compressor overload protector. Continued overheating of
the motor windings and/or cycling of the overload will eventually
lead to compressor motor or overload failure.
Failure to follow these procedures could
result in serious injury or death.
Refrigerant Charging
Proper refrigerant charge is essential to proper unit opera-
tion. Operating a unit with an improper refrigerant charge will
result in reduced performance (capacity) and/or efficiency.
Accordingly, the use of proper charging methods during ser-
vicing will insure that the unit is functioning as designed and
that its compressor will not be damaged.
24
Method Of Charging / Repairs
CAUTION
The acceptable method for charging the RAC system is the
Weighed in Charge Method. The weighed in charge method is
applicable to all units. It is the preferred method to use, as it is
the most accurate.
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
The weighed in method should always be used whenever
a charge is removed from a unit such as for a leak repair,
compressor replacement, or when there is no refrigerant
charge left in the unit. To charge by this method, requires the
following steps:
Failure to follow these procedures could
result in minor to moderate injury.
4. Make necessary repairs to system.
1. Install a piercing valve to remove refrigerant from the
sealedsystem. (Piercing valve must be removed from the
system before recharging.)
5. Evacuate system to 200 microns or less.
6. Weigh in refrigerant with the property quantity of R-410A
refrigerant.
2. Recover Refrigerant in accordance with EPA regulations.
7. Start unit, and verify performance.
WARNING
BURN HAZARD
WARNING
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
result in moderate or serious injury.
Failure to follow these procedures could
result in moderate or serious injury.
3. Install a process tube to sealed system.
8. Crimp the process tube and solder the end shut.
Undercharged Refrigerant Systems
An undercharged system will result in poor performance
(low pressures, etc.) in both the heating and cooling
cycle.
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
Whenever you service a unit with an undercharge of
refrigerant, always suspect a leak. The leak must be
repaired before charging the unit.
Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.
To check for an undercharged system, turn the unit on,
allow the compressor to run long enough to establish
working pressures in the system (15 to 20 minutes).
Failure to do so could result in serious injury or
death.
During the cooling cycle you can listen carefully at the exit
of the metering device into the evaporator; an intermittent
hissing and gurgling sound indicates a low refrigerant
charge. Intermittent frosting and thawing of the evaporator
is another indication of a low charge, however, frosting
and thawing can also be caused by insufficient air over
the evaporator.
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Checks for an undercharged system can be made at
the compressor. If the compressor seems quieter than
normal, it is an indication of a low refrigerant charge.
Failure to follow these procedures could
result in serious injury or death.
A check of the amperage drawn by the compressor
motor should show a lower reading. (Check the Unit
Specification.)
25
After the unit has run 10 to 15 minutes, check the gauge Improper air flow over the evaporator coil may indicate
pressures.Gaugesconnectedtosystemwithanundercharge some of the same symptoms as an over charged system.
will have low head pressures and substantially low suction An overcharge can cause the compressor to fail, since it
pressures.
would be “slugged” with liquid refrigerant.
The charge for any system is critical. When the compressor
is noisy, suspect an overcharge, when you are sure that the
air quantity over the evaporator coil is correct. Icing of the
evaporator will not be encountered because the refrigerant
will boil later if at all. Gauges connected to system will usually
have higher head pressure (depending upon amount of over
charge). Suction pressure should be slightly higher.
Overcharged Refrigerant Systems
Compressor amps will be near normal or higher.
Noncondensables can also cause these symptoms. To
confirm, remove some of the charge, if conditions improve,
system may be overcharged. If conditions don’t improve,
Noncondensables are indicated.
Wheneveranoverchargedsystemisindicated,alwaysmake
sure that the problem is not caused by air flow problems.
Restricted Refrigerant System
Troubleshooting a restricted refrigerant system can be
difficult. The following procedures are the more common
problems and solutions to these problems. There are two
types of refrigerant restrictions: Partial restrictions and
complete restrictions.
With a complete restriction the current drawn may be
considerably less than normal, as the compressor is
running in a deep vacuum (no load.) Much of the area of
the condenser will be relatively cool since most or all of the
liquid refrigerant will be stored there.
A partial restriction allows some of the refrigerant to
circulate through the system.
The following conditions are based primarily on a system
in the cooling mode.
With a complete restriction there is no circulation of
refrigerant in the system.
Restricted refrigerant systems display the same symptoms
as a “low-charge condition.”
When the unit is shut off, the gauges may equalize very
slowly.
Gauges connected to a completely restricted system will
run in a deep vacuum. When the unit is shut off, the gauges
will not equalize at all.
A quick check for either condition begins at the evaporator.
With a partial restriction, there may be gurgling sounds
at the metering device entrance to the evaporator. The
evaporator in a partial restriction could be partially frosted
or have an ice ball close to the entrance of the metering
device. Frost may continue on the suction line back to the
compressor.
Often a partial restriction of any type can be found by feel,
as there is a temperature difference from one side of the
restriction to the other.
With a complete restriction, there will be no sound at the
metering device entrance. An amperage check of the
compressor with a partial restriction may show normal
current when compared to the unit specification.
26
HERMETIC COMPONENTS CHECK
WARNING
BURN HAZARD
WARNING
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to follow these procedures could
result in moderate or serious injury.
Failure to do so could result in serious injury.
METERING DEVICE
Capillary Tube Systems
All units are equipped with capillary tube metering
devices.
3. Switch the unit to the heating mode and observe the
gauge readings after a few minutes running time. If
the system pressure is lower than normal, the heating
capillary is restricted.
Checking for restricted capillary tubes.
1. Connect pressure gauges to unit.
4. If the operating pressures are lower than normal in both
the heating and cooling mode, the cooling capillary is
restricted.
2. Start the unit in the cooling mode. If after a few minutes
of operation the pressures are normal, the check valve
and the cooling capillary are not restricted.
CHECK VALVE
the port (liquid line) to the outdoor coil. The flow path of
the refrigerant is then through the filter drier and heating
capillary to the outdoor coil.
A unique two-way check valve is used on the reverse cycle
heat pumps. It is pressure operated and used to direct the
flow of refrigerant through a single filter drier and to the
proper capillary tube during either the heating or cooling
cycle.
Failure of the slide in the check valve to seat properly in
either mode of operation will cause flooding of the cooling
coil. This is due to the refrigerant bypassing the heating or
cooling capillary tube and entering the liquid line.
One-way Check Valve
(Heat Pump Models)
COOLING MODE
In the cooling mode of operation, liquid refrigerant from
condenser (liquid line) enters the cooling check valve
forcing the heating check valve shut. The liquid refrigerant
is directed into the liquid dryer after which the refrigerant
is metered through cooling capillary tubes to evaporator.
(Note: liquid refrigerant will also be directed through the
heating capillary tubes in a continuous loop during the
cooling mode).
NOTE: The slide (check) inside the valve is made of teflon.
Should it become necessary to replace the check valve,
place a wet cloth around the valve to prevent overheating
during the brazing operation.
HEATING MODE
In the heating mode of operation, liquid refrigerant from
the indoor coil enters the heating check valve forcing the
cooling check valve shut. The liquid refrigerant is directed
into the liquid dryer after which the refrigerant is metered
through the heating capillary tubes to outdoor coils. (Note:
liquid refrigerant will also be directed through the cooling
capillary tubes in a continuous loop during the heating
mode).
CHECK VALVE OPERATION
In the cooling mode of operation, high pressure liquid enters
the check valve forcing the slide to close the opposite port
(liquid line) to the indoor coil. Refer to refrigerant flow chart.
This directs the refrigerant through the filter drier and cooling
capillary tube to the indoor coil.
In the heating mode of operation, high pressure refrigerant
enters the check valve from the opposite direction, closing
27
REVERSING VALVE DESCRIPTION/OPERATION
of the system. The pilot section of the valve opens and
WARNING
ELECTRIC SHOCK HAZARD
closes ports for the small capillary tubes to the main valve
to cause it to shift.
Disconnect power to the unit before servicing.
Failure to follow this warning could result in
serious injury or death.
NOTE: System operating pressures must be near
normal before valve can shift.
The Reversing Valve controls the direction of refrigerant flow
to the indoor and outdoor coils. It consists of a pressure-
operated, main valve and a pilot valve actuated by a solenoid
plunger. The solenoid is energized during the heating cycle
only. The reversing valves used in the PTAC system is a
2-position, 4-way valve.
The single tube on one side of the main valve body is the
high-pressure inlet to the valve from the compressor. The
center tube on the opposite side is connected to the low
pressure (suction) side of the system. The other two are
connected to the indoor and outdoor coils. Small capillary
tubes connect each end of the main valve cylinder to the “A”
and “B” ports of the pilot valve. A third capillary is a common
return line from these ports to the suction tube on the main
valve body. Four-way reversing valves also have a capillary
tube from the compressor discharge tube to the pilot valve.
The piston assembly in the main valve can only be shifted
by the pressure differential between the high and low sides
TESTING THE COIL
NOTE: Do not start unit with solenoid coil removed from
valve, or do not remove coil after unit is in operation. This
will cause the coil to burn out.
WARNING
ELECTRIC SHOCK HAZARD
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
CHECKING THE REVERSING VALVE
NOTE: You must have normal operating pressures before
Failure to do so could result in electric shock,
serious injury or death.
the reversing valve can shift.
WARNING
The solenoid coil is an electromagnetic type coil mounted
on the reversing valve and is energized during the
operation of the compressor in the heating cycle.
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
1. Turn off high voltage electrical power to unit.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
2. Unplug line voltage lead from reversing valve coil.
3. Check for electrical continuity through the coil. If you
do not have continuity replace the coil.
Failure to follow these procedures could
result in serious injury or death.
4. Check from each lead of coil to the copper liquid line
as it leaves the unit or the ground lug. There should
be no continuity between either of the coil leads
and ground; if there is, coil is grounded and must be
replaced.
Check the operation of the valve by starting the system
and switching the operation from “Cooling” to “Heating”
and then back to “Cooling”. Do not hammer on valve.
Occasionally, the reversing valve may stick in the heating
or cooling position or in the mid-position.
5. If coil tests okay, reconnect the electrical leads.
6. Make sure coil has been assembled correctly.
28
When sluggish or stuck in the mid-position, part of the
discharge gas from the compressor is directed back to the
suction side, resulting in excessively high suction pressure.
Touch Test in Heating/Cooling Cycle
WARNING
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.
Should the valve fail to shift from coooling to heating,
block the air flow through the outdoor coil and allow the
discharge pressure to build in the system. Then switch the
system from heating to cooling.
Proper safety procedures must be followed,
and proper protective clothing must be
worn.
If the valve is stuck in the heating position, block the air
flow through the indoor coil and allow discharge pressure
to build in the system. Then switch the system from heating
to cooling.
Failure to follow these procedures could
result in minor to moderate injury.
Shouldthevalvefailtoshiftineitherpositionafterincreasing
the discharge pressure, replace the valve.
The only definite indications that the slide is in the mid-
position is if all three tubes on the suction side of the valve
are hot after a few minutes of running time.
Dented or damaged valve body or capillary tubes can
prevent the main slide in the valve body from shifting.
NOTE: A condition other than those illustrated above, and
on Page 31, indicate that the reversing valve is not shifting
properly. Both tubes shown as hot or cool must be the same
corresponding temperature.
If you determing this is the problem, replace the reversing
valve.
Procedure For Changing Reversing Valve
After all of the previous inspections and checks have been
made and determined correct, then perform the “Touch
Test” on the reversing valve.
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.
NOTICE
FIRE HAZARD
The use of a torch requires extreme care and proper
judgment. Follow all safety recommended precautions
and protect surrounding areas with fire proof materials.
Have a fire extinguisher readily available. Failure to follow
this notice could result in moderate to serious property
damage.
Reversing Valve in Heating Mode
1. Install Process Tubes. Recover refrigerant from sealed
system. PROPER HANDLING OF RECOVERED
REFRIGERANT ACCORDING TO EPA REGULATIONS
IS REQUIRED.
2. Remove solenoid coil from reversing valve. If coil is to
be reused, protect from heat while changing valve.
3. Unbraze all lines from reversing valve.
4. Clean all excess braze from all tubing so that they will
slip into fittings on new valve.
5. Remove solenoid coil from new valve.
Reversing Valve in Cooling Mode
29
6. Protectnewvalvebodyfromheatwhilebrazingwith plastic
heat sink (Thermo Trap) or wrap valve body with wet
rag.
Determine L.R.V.
Start the compressor with the volt meter attached; then stop
the unit. Attempt to restart the compressor within a couple
of seconds and immediately read the voltage on the meter.
The compressor under these conditions will not start and will
usually kick out on overload within a few seconds since the
pressures in the system will not have had time to equalize.
Voltage should be at or above minimum voltage of 197 VAC,
as specified on the rating plate. If less than minimum, check
for cause of inadequate power supply; i.e., incorrect wire
size, loose electrical connections, etc.
7. Fit all lines into new valve and braze lines into new
valve.
WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Amperage (L.R.A.) Test
Failure to follow proper safety procedures
could result in serious injury or death.
The running amperage of the compressor is the most impor-
tant of these readings. A running amperage higher than that
indicated in the performance data indicates that a problem
exists mechanically or electrically.
8. Pressurize sealed system with a combination of R-410A
and nitrogen and check for leaks, using a suitable leak
detector. Recover refrigerant per EPA guidelines.
Single Phase Running and L.R.A. Test
NOTE: Consult the specification and performance section
for running amperage. The L.R.A. can also be found on the
rating plate.
9. Once the sealed system is leak free, install solenoid coil
on new valve and charge the sealed system by weighing
in the proper amount and type of refrigerant as shown
on rating plate. Crimp the process tubes and solder the
ends shut. Do not leave Schrader or piercing valves in
the sealed system.
Select the proper amperage scale and clamp the meter
probe around the wire to the “C” terminal of the compressor.
Turn on the unit and read the running amperage on the me-
ter. If the compressor does not start, the reading will indicate
the locked rotor amperage (L.R.A.).
NOTE: When brazing a reversing valve into the system, it is
of extreme importance that the temperature of the valve does
not exceed 250°F at any time.
Overloads
The compressor is equipped with an external or internal
overload which senses both motor amperage and winding
temperature. High motor temperature or amperage heats
the overload causing it to open, breaking the common circuit
within the compressor.
Wrap the reversing valve with a large rag saturated with
water. “Re-wet” the rag and thoroughly cool the valve after
each brazing operation of the four joints involved.
The wet rag around the reversing valve will eliminate
conduction of heat to the valve body when brazing the line
connection.
Heat generated within the compressor shell, usually due to
recycling of the motor, is slow to dissipate. It may take any-
where from a few minutes to several hours for the overload
to reset.
COMPRESSOR CHECKS
Checking the Overload
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment
with power applied.
Failure to do so could result in serious injury or
death.
Locked Rotor Voltage (L.R.V.) Test
Failure to do so could result in serious injury or
death.
Locked rotor voltage (L.R.V.) is the actual voltage available
at the compressor under a stalled condition.
Single Phase Connections
Disconnect power from unit. Using a voltmeter, attach one
lead of the meter to the run “R” terminal on the compressor
and the other lead to the common “C” terminal of the com-
pressor. Restore power to unit.
30
Add values “C” to “S” and “C” to “R” together and check
resistancefromstarttorunterminals(“S”to“R”). Resistance
“S” to “R” should equal the total of “C” to “S” and “C” to “R.”
WARNING
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.
In a single phase PSC compressor motor, the highest
value will be from the start to the run connections (“S” to
“R”). The next highest resistance is from the start to the
common connections (“S” to “C”). The lowest resistance
is from the run to common. (“C” to “R”) Before replacing a
compressor, check to be sure it is defective.
Proper safety procedures must be followed,
and proper protective clothing must be
worn.
Failure to follow this warning could result
in moderate to serious injury.
External Overload VPAK 9, 12, 18 K Btus
With power off, remove the leads from compressor termi-
nals. If the compressor is hot, allow the overload to cool
before starting check. Using an ohmmeter, test continu-
ity across the terminals of the external overload. If you
do not have continuity; this indicates that the overload is
open and must be replaced.
Internal Overload VPAK 24 K Btus
The overload is embedded in the motor windings to
sense the winding temperature and/or current draw. The
overload is connected in series with the common motor
terminal.
GROUND TEST
Use an ohmmeter set on its highest scale. Touch one
lead to the compressor body (clean point of contact as a
good connection is a must) and the other probe in turn
to each compressor terminal. If a reading is obtained the
compressor is grounded and must be replaced.
1. With no power to unit, remove the leads from the com-
pressor terminals. Allow motor to cool.
2. Using an ohmmeter, test continuity between terminals
C-S and C-R. If no continuity, the compressor overload is
open and the compressor must be replaced.
Check the complete electrical system to the compressor
and compressor internal electrical system, check to be
certain that compressor is not out on internal overload.
Completeevaluationofthesystemmustbemadewhenever
you suspect the compressor is defective. If the compressor
has been operating for sometime, a careful examination
must be made to determine why the compressor failed.
Internal Overload
Many compressor failures are caused by the following
conditions:
1. Improper air flow over the evaporator.
Single Phase Resistance Test
2. Overcharged refrigerant system causing liquid to be
returned to the compressor.
WARNING
ELECTRIC SHOCK HAZARD
3. Restricted refrigerant system.
4. Lack of lubrication.
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment
with power applied.
5. Liquid refrigerant returning to compressor causing oil
to be washed out of bearings.
Failure to do so could result in serious injury or
death.
6.
Noncondensables such as air and moisture in
the system. Moisture is extremely destructive to a
refrigerant system.
Remove the leads from the compressor terminals and set
the ohmmeter on the lowest scale (R x 1).
Touch the leads of the ohmmeter from terminals common
to start (“C” to “S”). Next, touch the leads of the ohmmeter
from terminals common to run (“C” to “R”).
31
COMPRESSOR REPLACEMENT
Recommendedprocedureforcompressor
replacement
3. After all refrigerant has been recovered, disconnect
suction and discharge lines from the compressor and
remove compressor. Be certain to have both suction
and discharge process tubes open to atmosphere.
WARNING
4. Carefully pour a small amount of oil from the suction
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
stub of the defective compressor into a clean
container.
5. Using an acid test kit (one shot or conventional kit), test
the oil for acid content according to the instructions
with the kit.
Failure to do so could result in electric shock,
serious injury or death.
6. If any evidence of a burnout is found, no matter how
slight, the system will need to be cleaned up following
proper procedures.
1. Be certain to perform all necessary electrical and
refrigeration tests to be sure the compressor is
actually defective before replacing.
7. Install the replacement compressor.
WARNING
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow proper safety procedures
result in serious injury or death.
Failure to follow these procedures could
result in serious injury or death.
8. Pressurize with a combination of R-410A and nitrogen
and leak test all connections with leak detector capable of
detecting HFC (Hydrofluorocarbon) refrigerant. Recover
refrigerant/nitrogen mixture and repair any leaks found.
2. Recover all refrigerant from the system though
the process tubes. PROPER HANDLING OF
RECOVERED REFRIGERANT ACCORDING TO
EPA REGULATIONS IS REQUIRED. Do not use
gauge manifold for this purpose if there has been
a burnout. You will contaminate your manifold and
hoses. Use a Schrader valve adapter and copper
tubing for burnout failures.
Repeat Step 8 to insure no more leaks are present.
9. Evacuate the system with a good vacuum pump capable
of a final vacuum of 200 microns or less. The system
should be evacuated through both liquid line and suction
line gauge ports. While the unit is being evacuated, seal
all openings on the defective compressor.
WARNING
HIGH TEMPERATURES
CAUTION
FREEZE HAZARD
Extreme care, proper judgment and all safety
procedures must be followed when testing,
troubleshooting, handling or working around
unit while in operation with high temperature
components. Wear protective safety aids
such as: gloves, clothing etc.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to follow these procedures could
result in minor to moderate injury.
Failure to do so could result in serious burn
injury.
10. Recharge the system with the correct amount of
refrigerant. The proper refrigerant charge will be
found on the unit rating plate. The use of an accurate
measuring device, such as a charging cylinder,
NOTICE
FIRE HAZARD
electronic scales or similar device is necessary.
The use of a torch requires extreme care and proper
judgment. Follow all safety recommended precautions
and protect surrounding areas with fire proof materials.
Have a fire extinguisher readily available. Failure to follow
this notice could result in moderate to serious property
damage.
NOTE: NEVER, under any circumstances, liquid charge a
rotary compressor through the LOW side. Doing so would
cause permanent damage to the new compressor.
32
SPECIAL PROCEDURE IN THE CASE OF MOTOR
COMPRESSOR BURNOUT
To ensure proper unit operation and life expectancy, the
following maintenance procedures should be performed
on a regular basis
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
1. Air Filter
To ensure proper unit operation, the air filters should
be replaced at least monthly, and more frequently if
conditions warrant.
Failure to do so may result in personal injury,
or death.
2. Coils & Chassis
NOTE: Do not use a caustic coil cleaning agent on coils
or base pan. Use a biodegradable cleaning agent and
degreaser. The use of harsh cleaning materials may
lead to deterioration of the aluminum fins or the coil end
plates.
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
The indoor coil and outdoor coils and base pan should
be inspected periodically (annually or semi-annually)
and cleaned of all debris (lint, dirt, leaves, paper, etc.)
as necessary. Under extreme conditions, more frequent
cleaning may be required. Clean the coils and base
pan with a soft brush and compressed air or vacuum.
A pressure washer may also be used, however, you
must be careful not to bend the aluminum fin pack. Use
a sweeping up and down motion in the direction of the
vertical aluminum fin pack when pressure cleaning coils.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.
WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Note: It is extremely important to insure that none of the
electrical and/or electronic parts of the unit get wet. Be
sure to cover all electrical components to protect them
from water or spray.
Failure to follow proper safety procedures
result in serious injury or death.
3. Fresh Air Vent
Ensure the fresh air vent door and lever are operating
properly.
1.
2.
Recover all refrigerant and oil from the system.
4. Fan Motor & Compressor
The fan motor & compressor and are permanently
lubricated, and require no additional lubrication.
Remove compressor, capillary tube and filter drier
from the system.
3.
Flush evaporator condenser and all connecting
tubing with dry nitrogen or equivalent. Use approved
flushing agent to remove all contamination from
system. Inspect suction and discharge line for
carbon deposits. Remove and clean if necessary.
Ensure all acid is neutralized.
5. Drain System
Inspect the drain system periodically (annually or
semi-annually) and clean as required. Under extreme
conditions, more frequent cleaning may be necessary.
Clean these areas with an antibacterial and antifungal
cleaner. Rinse both items thoroughly with water and
ensure that the drain outlets are operating properly.
4. Reassemble the system, including new drier strainer
and capillary tube.
5. Proceed with step 8-10 on previous page.
ROUTINE MAINTENANCE
WARNING
ELECTRICAL SHOCK HAZARD!
Turn off electrical power before service or
installation. All eletrical connections and wiring
MUST be installed by a qualified electrician
and conform to the National Code and all local
codes which have jurisdiction. Failure to do so
can result in property damage, personal injury
and/or death.
33
ROOM AIR CONDITIONER UNIT PERFORMANCE TEST DATA SHEET
JOB NAME________________________________ TECHS NAME____________________________________
DATE: _______________ MODEL:_______________ SERIAL:________________
HOW IS ALL OF THE INSTALLATION?
GOOD BAD
YES
____
____
____
____
____
NO
____
____
____
____
____
IS THE UNIT INSTALLED 2 3/8” INTO THE PLENUM?
IS THE FR E S H/E XAUS T AIR VE NT OP E N?
IS A FR IE DR IC H ‘H’ WALL PLENUM INSTALLED?
IS A FR IE DR IC H OUTDOOR G R IL LE INS T ALLE D?
IS MAINTE NANC E B E ING PE R FOR ME D?
If NO is checked use back of sheet for explanation
E LE C T R IC AL:
LINE VOLTAGE (STATIC)
START UP VOLTAGE
AMPERAGE DRAW
AMPERAGE DRAW
C OMP R E S S OR
--------- VOLTS
-------- VOLTS
--------- AMPS (COOL)
--------- AMPS (HEAT)
LOCKED ROTOR AMPS
AMPERAGE DRAW
--------- AMPS
--------- AMPS
INDOOR TE MP E R ATUR E S :
INDOOR AMBIENT TEMPERATURE
RELATIVE HUMIDITY (RH) INDOOR
-------- F
-------- %
C OOL
HE AT
DISCHARGE AIR TEMPERATURE (INDOOR)
RETURN AIR TEMPERATURE (INDOOR)
DIFFERENTIAL
---------- F --------- F
---------- F --------- F
---------- F --------- F
OUTDOOR TE MPE R AT UR E :
OUTDOOR AMBIENT TEMPERATURE
RH OUTDOOR (RELATIVE HUMIDITY)
--------- F
--------- %
CONDENSER:
DISCHARGE AIR TEMPERATURE
INTAKE AIR TEMPERATURE
DIFFERENTIAL
--------- F ---------- F
--------- F ---------- F
---------- F --------- F
APPLICATION USE ------------------------- ROOM (RESIDENTIAL OR COMMERCIAL)
COOLING OR HEATING AREA W ------------------- X L -------------------- X H --------------------- = SQ/CU/FT ----------------------
T his is a general guide. pleas e c ons ult manual J or M.
Sizing Guide
The following guide is based on normal room insulat ion, average number of sun-exposed windows and two- person occupancy.
This is a general guide.
Please consult manual J or M for exact load calculations.
1. If heavily shaded, reduce capacity 10%.
2. If very sunny, add 10%.
3. Add 500 BTU/H per person over 2 people.
4. Add 4,000 BTU/H if area is a kitchen.
34
THERMISTORS’ RESISTANCE VALUES
(This Table Applies to All Thermistors)
5(6,67$1&(ꢀ
FAHRENHEIT
7(03
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ꢈꢇꢅꢉꢆꢀꢀ
ꢈꢇꢍꢊꢉꢀꢀ
ꢍꢇꢎꢅꢎꢀꢀ
ꢍꢇꢈꢎꢆꢀꢀ
ꢎꢊꢇꢄꢎꢍꢀꢀ
ꢊꢍꢇꢎꢉꢆꢀꢀ
ꢋꢆꢇꢋꢎꢎꢀꢀ
ꢌꢍꢇꢍꢌꢊꢀꢀ
ꢈꢌꢇꢌꢆꢍꢀꢀ
ꢍꢎꢇꢅꢍꢈꢀꢀ
ꢍꢊꢇꢊꢈꢊꢀꢀ
ꢍꢋꢇꢋꢄꢉꢀꢀ
ꢍꢌꢇꢈꢅꢆꢀꢀ
ꢍꢈꢇꢈꢆꢉꢀꢀ
ꢍꢍꢇꢍꢎꢋꢀꢀ
ꢍꢆꢇꢍꢎꢌꢀꢀ
ꢍꢉꢇꢈꢉꢎꢀꢀ
ꢍꢄꢇꢌꢍꢈꢀꢀ
ꢆꢅꢇꢌꢊꢅꢀꢀ
ꢆꢎꢇꢊꢄꢈꢀꢀ
ꢆꢈꢇꢊꢈꢌꢀꢀ
ꢆꢉꢇꢍꢅꢉꢀꢀ
ꢉꢎꢇꢌꢈꢆꢀꢀ
ꢉꢋꢇꢉꢉꢌꢀꢀ
ꢉꢈꢇꢄꢈꢍꢀꢀ
ꢉꢍꢇꢋꢋꢋꢀꢀ
ꢉꢍꢇꢍꢄꢉꢀꢀ
ꢉꢆꢇꢅꢈꢊꢀꢀ
ꢉꢆꢇꢋꢄꢍꢀꢀ
ꢉꢆꢇꢆꢋꢅꢀꢀ
ꢉꢉꢇꢅꢈꢋꢀꢀ
ꢉꢉꢇꢋꢍꢍꢀꢀ
ꢉꢉꢇꢍꢆꢅꢀꢀ
ꢉꢉꢇꢄꢍꢈꢀꢀ
ꢉꢄꢇꢊꢈꢎꢀꢀ
ꢉꢄꢇꢈꢋꢅꢀꢀ
ꢉꢄꢇꢆꢄꢄꢀꢀ
ꢅꢇꢅꢈꢌꢀꢀ
ꢅꢇꢋꢅꢅꢀꢀ
ꢅꢇꢈꢌꢅꢀꢀ
ꢅꢇꢆꢆꢋꢀꢀ
ꢅꢇꢄꢄꢄꢀꢀ
ꢎꢇꢊꢎꢄꢀꢀ
ꢎꢇꢌꢋꢋꢀꢀ
ꢎꢇꢍꢌꢎꢀꢀ
ꢎꢇꢉꢌꢌꢀꢀ
ꢊꢇꢅꢌꢅꢀꢀ
ꢊꢇꢊꢋꢎꢀꢀ
ꢊꢇꢌꢎꢍꢀꢀ
ꢊꢇꢈꢄꢆꢀꢀ
ꢊꢇꢆꢆꢋꢀꢀ
ꢊꢇꢄꢌꢌꢀꢀ
ꢋꢇꢎꢎꢅꢀꢀ
ꢋꢇꢊꢆꢊꢀꢀ
ꢋꢇꢌꢋꢅꢀꢀ
ꢋꢇꢈꢉꢊꢀꢀ
ꢋꢇꢆꢋꢎꢀꢀ
ꢋꢇꢉꢆꢆꢀꢀ
ꢌꢇꢅꢎꢉꢀꢀ
ꢌꢇꢎꢈꢈꢀꢀ
ꢌꢇꢆꢄꢎꢀꢀ
ꢈꢇꢋꢌꢉꢀꢀ
ꢈꢇꢉꢋꢉꢀꢀ
ꢍꢇꢊꢍꢄꢀꢀ
ꢌꢇꢉꢋꢀꢀ
ꢈꢇꢅꢈꢀꢀ
ꢈꢇꢊꢆꢀꢀ
ꢈꢇꢌꢄꢀꢀ
ꢈꢇꢆꢎꢀꢀ
ꢈꢇꢄꢋꢀꢀ
ꢈꢇꢄꢆꢀꢀ
ꢍꢇꢅꢊꢀꢀ
ꢍꢇꢅꢍꢀꢀ
ꢍꢇꢎꢅꢀꢀ
ꢍꢇꢎꢈꢀꢀ
ꢍꢇꢎꢄꢀꢀ
ꢍꢇꢊꢌꢀꢀ
ꢍꢇꢊꢋꢀꢀ
ꢍꢇꢋꢊꢀꢀ
ꢍꢇꢋꢆꢀꢀ
ꢍꢇꢈꢄꢀꢀ
ꢍꢇꢉꢎꢀꢀ
ꢆꢇꢅꢋꢀꢀ
ꢆꢇꢊꢌꢀꢀ
ꢆꢇꢌꢍꢀꢀ
ꢆꢇꢈꢎꢀꢀ
ꢆꢇꢈꢈꢀꢀ
ꢆꢇꢍꢅꢀꢀ
ꢆꢇꢍꢌꢀꢀ
ꢆꢇꢍꢉꢀꢀ
ꢆꢇꢆꢋꢀꢀ
ꢆꢇꢆꢆꢀꢀ
ꢆꢇꢉꢎꢀꢀ
ꢆꢇꢉꢍꢀꢀ
ꢆꢇꢄꢅꢀꢀ
ꢆꢇꢄꢈꢀꢀ
ꢆꢇꢄꢄꢀꢀ
ꢆꢇꢄꢍꢀꢀ
ꢆꢇꢄꢊꢀꢀ
ꢆꢇꢉꢄꢀꢀ
ꢆꢇꢉꢍꢀꢀ
ꢆꢇꢉꢊꢀꢀ
ꢆꢇꢆꢄꢀꢀ
ꢆꢇꢆꢍꢀꢀ
ꢆꢇꢆꢊꢀꢀ
ꢆꢇꢍꢄꢀꢀ
ꢆꢇꢍꢍꢀꢀ
ꢆꢇꢍꢊꢀꢀ
ꢆꢇꢈꢄꢀꢀ
ꢆꢇꢈꢍꢀꢀ
ꢆꢇꢈꢊꢀꢀ
ꢆꢇꢌꢄꢀꢀ
ꢆꢇꢌꢍꢀꢀ
ꢆꢇꢌꢊꢀꢀ
ꢆꢇꢋꢄꢀꢀ
ꢆꢇꢋꢍꢀꢀ
ꢆꢇꢋꢊꢀꢀ
ꢆꢇꢊꢄꢀꢀ
ꢆꢇꢊꢍꢀꢀ
ꢆꢇꢊꢊꢀꢀ
ꢆꢇꢅꢍꢀꢀ
ꢍꢇꢉꢄꢀꢀ
ꢍꢇꢆꢊꢀꢀ
ꢍꢇꢈꢍꢀꢀ
ꢉꢄꢀꢀ
ꢉꢌꢀꢀ
ꢆꢄꢀꢀ
ꢆꢌꢀꢀ
ꢍꢄꢀꢀ
ꢍꢉꢀꢀ
ꢍꢆꢀꢀ
ꢍꢍꢀꢀ
ꢍꢈꢀꢀ
ꢍꢌꢀꢀ
ꢍꢋꢀꢀ
ꢍꢊꢀꢀ
ꢍꢎꢀꢀ
ꢍꢅꢀꢀ
ꢈꢄꢀꢀ
ꢈꢌꢀꢀ
ꢌꢄꢀꢀ
ꢌꢌꢀꢀ
ꢋꢄꢀꢀ
ꢋꢌꢀꢀ
ꢋꢋꢀꢀ
ꢋꢊꢀꢀ
ꢋꢎꢀꢀ
ꢋꢅꢀꢀ
ꢊꢄꢀꢀ
ꢊꢉꢀꢀ
ꢊꢆꢀꢀ
ꢊꢍꢀꢀ
ꢊꢈꢀꢀ
ꢊꢌꢀꢀ
ꢊꢋꢀꢀ
ꢊꢊꢀꢀ
ꢊꢎꢀꢀ
ꢊꢅꢀꢀ
ꢎꢄꢀꢀ
ꢎꢉꢀꢀ
ꢎꢆꢀꢀ
ꢎꢍꢀꢀ
ꢎꢈꢀꢀ
ꢎꢌꢀꢀ
ꢎꢋꢀꢀ
ꢎꢊꢀꢀ
ꢎꢎꢀꢀ
ꢎꢅꢀꢀ
ꢅꢄꢀꢀ
ꢅꢉꢀꢀ
ꢅꢆꢀꢀ
ꢅꢍꢀꢀ
ꢅꢈꢀꢀ
ꢅꢌꢀꢀ
ꢅꢋꢀꢀ
ꢅꢊꢀꢀ
ꢅꢎꢀꢀ
ꢅꢅꢀꢀ
ꢉꢄꢄꢀꢀ
ꢉꢄꢌꢀꢀ
ꢉꢉꢄꢀꢀ
ꢉꢉꢌꢀꢀ
ꢉꢆꢄꢀꢀ
35
ELECTRICAL TROUBLESHOOTING CHART - COOLING
9K BTU, 12K BTU, & 18K BTU
NO COOLING OPERATION
Before continuing
check for Error
Codes, see
electronics control
diagnostics on
page 16
Insure that Fuses
are good and/or that
Circuit Breakers are
on and voltage is 208/230
O.K.
Set thermostat to
"Cool," and the Temp.
below the present
Room Temp.
Nothing operates,
entire system
appears dead
Yes
No
O.K.
SCENARIO 2
SCENARIO 1
Check Supply Circuit’s
jumper at transformer. If
okay, replace board
Line voltage present
at the Transformer
Primary
Compressor and Fan
Motor should now
operate
Compressor runs but
Blower/Fan doesn't
Fan runs but
Compressor doesn't
No
No
Yes
Yes
Yes
Yes
Problems indicated with
Control Transformer
replace board
24 Volts at
See Refrigerant Circuit
diagnosis if unit still is
not cooling properly
“R” Terminal on board
No
No
Yes
Problems indicated
with t-stat or
control wiring. Fix.
24 Volts present at
Y terminals on
t-stat and board?
Yes
3 minute delay done
at control board?
Wait until done
Defective t-stat
defective control wiring
or transformer
No
No
No
24V at t-stat and
control wiring?
No
Yes
Yes
208/230 volts present
at compressor’s
Replace board
Yes
relay on board?
Yes
Repair or replace
what is needed
Are wiring connections
and capacitor good?
Yes
Compressor and fan
motor should now
operate
No
Yes
Problems indicated
in Blower Relay
of board
Is Line Voltage present
at Motor Leads?
No
Supply Circuit
problems, loose
Connections, or bad
Relays/Board
Is Locked Rotor
See Refrigerant
Circuit Diagnosis if
unit still is not cooling
properly
Yes
Voltage a minimum of
197 Volts?
No
No
Yes
Check Capacitor, is
Capacitor Good?
Replace Capacitor
No
No
Replace Capacitor
and/or Start Assist
Device
Are Capacitor and (if
so equipped) Start
Assist good?
Yes
Possible motor
problem indicated.
Check motor
Yes
Motor should run
thoroughly
Allow ample time
for pressures to
equalize
Have System
Pressures Equalized?
No
No
Yes
Possible Compressor
problem indicated.
See Compressor
Checks
Compressor should
run
36
ELECTRICAL TROUBLESHOOTING CHART - COOLING
24K BTU
NO COOLING OPERATION
Before continuing
check for Error
Codes, see
electronics control
diagnostics on
page 16
Insure that Fuses
are good and/or that
Circuit Breakers are
on and voltage is 208/230
O.K.
Set thermostat to
"Cool," move the Temp.
lever below the present
Room Temp.
Nothing operates,
entire system
appears dead
Yes
No
O.K.
Check Supply Circuit’s
jumper at transformer. If
okay, replace board
Line voltage present
at the Transformer
Primary
Compressor outdoor
fan motor and indoor
blower should now
operate
Compressor and outdoor
fan motor run but indoor
blower does not run
Indoor blower runs but
outdoor fan motor and
compressor do not run
No
No
No
No
Yes
Yes
Yes
Yes
Problems indicated with
Control Transformer
replace board
24 Volts at
“R” Terminal on board
See Refrigerant Circuit
diagnosis if unit still is
not cooling properly
Yes
Yes
24 Volts present at
Y terminals on
t-stat and board?
Problems indicated with
Room Thermostat or
Control Wiring. Fix.
Yes
Yes
3 minute delay done
on control board?
Wait until done
Replace control board
Replace contactor
Defective t-stat
defective control wiring
or transformer
24V at t-stat and
control wiring?
No
No
No
No
No
Yes
Yes
208/230 Volts present
at compressor’s relay
on control board?
Yes
Is compressor/fan
motor contactor
closed?
Yes
Are wiring,
connections, and
capacitor good?
Repair or replace
component
Yes
Problems indicated
in Blower Relay
of board
Is Line Voltage present
at Motor Leads?
Compressor and
outdoor fan motor
should now operate
No
Yes
Yes
Supply Circuit
problems, loose
Connections, or bad
Relays/Board
Is Locked Rotor
Check Capacitor, is
Capacitor Good?
See Refrigerant
Circuit Diagnosis
if unit still is not
cooling properly
Replace Capacitor
Voltage a minimum of
No
No
197 Volts?
No
No
Yes
Yes
Possible motor
problem indicated.
Check motor
Replace Capacitor
and/or Start Assist
Device
Are Capacitor and (if
so equipped) Start
Assist good?
Motor should run
thoroughly
Yes
Allow ample time
for pressures to
equalize
Have System
Pressures Equalized?
No
No
Yes
Possible Compressor
problem indicated.
See Compressor
Checks
Compressor should
run
37
ELECTRICAL TROUBLESHOOTING CHART
HEAT PUMP
HEAT PUMP MODE
SYSTEM COOLS WHEN
HEATING IS DESIRED.
Is Line Voltage
Present at
Solenoid Valve?
NO
Is Selector Switch
set for Heat?
YES
NO
Is the Solenoid
Coil Good?
Replace Solenoid Coil
YES
Reversing Valve Stuck
YES
Replace Reversing Valve
38
TROUBLESHOOTING CHART - COOLING
REFRIGERANT SYSTEM DIAGNOSIS COOLING
PROBLEM
PROBLEM
PROBLEM
PROBLEM
LOW SUCTION PRESSURE
HIGH SUCTION PRESSURE
LOW HEAD PRESSURE
HIGH HEAD PRESSURE
Low Load Conditions
High Load Conditions
Low Load Conditions
High Load Conditions
Low Air Flow Across
Indoor Coil
High Air Flow Across
Indoor Coil
Refrigerant System
Restriction
Low Air Flow Across
Outdoor Coil
Refrigerant System
Restriction
Reversing Valve not
Fully Seated
Reversing Valve not
Fully Seated
Overcharged
Undercharged
Overcharged
Non-Condensables (air)
Undercharged System
Defective Compressor
Moisture in System
Defective Compressor
TROUBLESHOOTING CHART - HEATING (HEAT PUMP)
REFRIGERANT SYSTEM DIAGNOSIS HEATING
PROBLEM
PROBLEM
PROBLEM
PROBLEM
LOW SUCTION PRESSURE
HIGH SUCTION PRESSURE
LOW HEAD PRESSURE
HIGH HEAD PRESSURE
Low Air Flow Across
Outdoor Coil
Outdoor Ambient Too High
for Operation in Heating
Refrigerant System
Restriction
Outdoor Ambient Too High
For Operation In Heating
Refrigerant System
Restriction
Reversing Valve not
Fully Seated
Reversing Valve not
Fully Seated
Low Air Flow Across
Indoor Coil
Undercharged
Overcharged
Undercharged
Overcharged
Non-Condensables (air)
in System
Moisture in System
Defective Compressor
Defective Compressor
39
REMOTE WALL THERMOSTAT WIRING DIAGRAMS
LEGEND FOR
AT WIRING HARNESS
R
24 VAC Power From Unit
C
Common Terminal
GL
GH
O/B
O
Call for Low Fan
Call for High Fan
Reversing Valve - Con!gurable
Cool mode, active reversing valve
B
Y
Heat mode, active reversing valve for VPAK heat pump unit
Coil for Cooling
Call for Heat
W
RT6 - Two Speeds Fan T-Stat - Field Provided
-- -- -- Field Wiring
COOL WITH ELECTRIC HEAT
Electronic Control Board
24 VAC Connections
Y
R
W
C
GH GL
B
R
C
GH GL O/B
Y
W
RT6 Thermostat
HEAT PUMP WITH ELECTRIC HEAT
Electronic Control Board
24 VAC Connections
Y
R
W
C
GH GL
B
R
C
GH GL O/B
Y
W
RT6 Thermostat
40
COOL WITH ELECTRIC HEAT
ELECTRICAL & THERMOSTAT WIRING DIAGRAM
VEA 09/12/18 with 2.5 KW, 3.4 KW or 5KW ELECTRIC HEAT
6 T R
E U L B
K C A L B
) 2 L O T ( 0 2 5 E T I H W
41
HEAT PUMP WITH ELECTRIC HEAT
ELECTRICAL & THERMOSTAT WIRING DIAGRAM
VHA 09/12/18 with 2.5 KW, 3.4 KW or 5KW ELECTRIC HEAT
6 T R
K C A L B
K C L A B
E U L B
K C A L B
) 2 L O T ( 0 2 5 E T I H W
42
COOL WITH ELECTRIC HEAT
ELECTRICAL & THERMOSTAT WIRING DIAGRAM
VEA 24 with 2.5 KW, 3.4 KW or 5KW ELECTRIC HEAT
6 T R
E U L B
E U L B
K C A L B
K C A L B
D E R
) 2 L O T ( 0 2 5 E T I H W
43
COOL WITH ELECTRIC HEAT
ELECTRICAL & THERMOSTAT WIRING DIAGRAM
VEA 24 with 7.5 KW and 10 KW ELECTRIC HEAT
6 T R
E U L B
E U L B
K C A L B
K C A L B
D E R
) 2 L O T ( 0 2 5 E T I H W
44
HEAT PUMP WITH ELECTRIC HEAT
ELECTRICAL & THERMOSTAT WIRING DIAGRAM
VHA 24 with 2.5 KW, 3.4 KW or 5KW ELECTRIC HEAT
6 T R
E U L B
E U L B
K C A L B
K C L A B
K C A L B
K C L A B
D E R
)
L 2 O T (
0
5 2 E T I H W
45
HEAT PUMP WITH ELECTRIC HEAT
ELECTRICAL & THERMOSTAT WIRING DIAGRAM
VHA 24 with 7.5 KW and 10KW ELECTRIC HEAT
6 T R
E U L B
E
L U B
C A K L B
K C A L B
K C A L B
K C L A B
D E R
) 2 L O T ( 0 2 5 E T I H W
46
Accessories
MODEL
DESCRIPTION
PHOTO
WALL PLENUM Two-part sleeve that telescopes in and out
from 5 1
2
to 8 in depth. The wall plenum sits inside the
exterior wall penetration.
DIMENSIONS: 303 high x 241 wide
CUTOUT DIMENSIONS: 307 high x 245 wide.
VPAWP1-8
8
8
8
8
Same as VPAWP1-8, but telescopes 8 to 14 as required.
VPAWP1-14
VPAL2
ARCHITECTURAL LOUVER Extruded aluminum louver
that attaches to the outdoor section of the wall plenum.
DIMENSIONS: 311 high x 25 9 wide.
16
16
Same as VPAL2 but can be ordered in a special color to
match the exterior wall.
VPSC2
RT4
DIGITAL REMOTE WALL THERMOSTAT Single stage
thermostat, used on VERT-I-PAK units. Hard wired with
single speed fan. Direct replacement for RT2.
DIGITAL REMOTE WALL THERMOSTAT Single stage
cool, single stage heat thermostat. Features high/low fan
speed switch, Hi/Low temperature limiting. Thermostat is
hard wired and is unit powered. Features backlight display
and multiple configuration.
RT6
ACCESS PANEL / RETURN AIR GRILLE - Serves as an
access panel to chassis and interior return air grille. A
field-supplied (25” x 20”) filter is mounted inside the hinged
access door.
Kit contains hinge bracket for mounting the door with the return
air openings high or low on the door for optimal sound
attenuation.
For 9,000 / 12,000 / 18,000 Btu models, it is recommended to
install the door with the hinge on the right side and the return air
openings high on the door. For 24,000 Btu models, it is
recommended to install the hinge on the left side with the return
air openings low on the door.
VPRG4
VPDP1
DIMENSIONS: 58" high x 29" wide.
3
CUTOUT DIMENSIONS: 55
4" high x 27" wide.
/
DRAIN PAN Drain pan may be installed prior to chassis for
easy installation/removal. For VPAK 24K only.
47
Friedrich Air Conditioning Company
10001 Reunion Place, Suite 500
San Antonio, Tx 78216
1-800-541-6645
VERT-I-PAK® A SERIES
SINGLE PACKAGE VERTICAL AIR CONDITIONERS
LIMITED WARRANTY
SAVE THIS CERTIFICATE. It gives you specific rights, you may also have other rights which may vary from state to state and province to
province.
In the event that your unit needs servicing, contact your nearest authorized service center. If you do not know the nearest service center,
ask the company that installed your unit or contact us - see address and telephone number above. To obtain service and/or warranty parts
replacement, you must notify an authorized FRIEDRICH Air Conditioning Co. service center, distributor, dealer, or contractor of any defect
within the applicable warranty period.
When requesting service:
and serial number from your unit readily available.
please have the model
Unless specified otherwise herein, the following applies:
FRIEDRICH VERT-I-PAK A SERIES VERTICAL AIR CONDITIONERS AND HEAT PUMPS
LIMITED WARRANTY - FIRST YEAR (Twelve (12) months from the date of installation). Any part found to be defective in the material
or workmanship will be repaired or replaced free of charge by our authorized service center during the normal working hours; and
LIMITED WARRANTY - SECOND THROUGH FIFTH YEAR (Sixty (60) months from the date of installation). ON THE SEALED
REFRIGERATION SYSTEM. Any part of the sealed refrigeration system that is defective in material or workmanship will be repaired or
replaced free of charge (excluding freight charges) by our authorized service center during normal working hours. The sealed refrigeration
system consists of the compressor, metering device, evaporator, condenser, reversing valve, check valve, and the interconnecting tubing.
These warranties apply only while the unit remains at the original site and only to units installed inside the continental United
States, Alaska, Hawaii, Puerto Rico, Mexico and Canada. The warranty applies only if the unit is installed and operated in accordance with
the printed instructions and in compliance with applicable local installation and building codes and good trade practices. For
international warranty information, contact the Friedrich Air Conditioning Company - International Division.
Any defective part to be replaced must be made available toFRIEDRICH in exchange for the replacement part. Reasonable proof must be
presented to establish the date of install, otherwise the beginning date of this certificate will be considered to be our shipment date plus sixty
days. Replacement parts can be new or remanufactured. Replacement parts and labor are only warranted for any unused portion of the
unit’s warranty.
We will not be responsible for and the user will pay for:
1. Service calls to:
A) Instruct on unit operation. B) Replace house fuses or correct house wiring. C) Clean or replace air filters. D) Remove the unit
from its installed location when not accessible for service required. E) Correct improper installations.
2. Parts or labor provided by anyone other than an authorized service center.
3. Damage caused by:
A) Accident, abuse, negligence, misuse, riot, fire, flood, or acts of God. B) Operating the unit where there is a corrosive atmosphere
containing chlorine, fluorine, or any damaging chemicals (other than in a normal residential environment). C) Unauthorized
alteration or repair of the unit, which in turn affects its stability or performance. D) Failing to provide proper maintenance and
service. E) Using an incorrect power source. F) Faulty installation or application of the unit.
We shall not be liable for any incidental, consequential, or special damages or expenses in connection with any use or failure of
this unit. We have not made and do not make any representation or warranty of fitness for a particular use or purpose and there
is no implied condition of fitness for a particular use or purpose. We make no expressed warranties except as stated in this
certificate. No one is authorized to change this certificate or to create for us any other obligation or liability in connection with
this unit. Any implied warranties shall last for one year after the original purchase date. Some states and provinces do not allow
limitations on how long an implied warranty or condition lasts, so the above limitations or exclusions may not apply to you. The provisions of
this warranty are in addition to and not a modification of or subtraction from the statutory warranties and other rights and remedies provided
by law.
Performance of Friedrich’s Warranty obligation is limited to one of the following methods:
1. Repair of the unit
2. A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit.
3. Providing a replacement unit of equal value
The method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning
In case of any questions regarding the provisions of this warranty, the English version will govern.
(10-06)
48
2011 VPAK 9K-18K BTU/h Models
8
4
7
1
9
10
6
2
3
5
11
49
2011 VPAK 9K-18K BTU/h Models
16
17
15
13
14
12
50
2011 VPAK 9K-18K BTU/h Models
25
26
16
28
27
24
23
51
2011 VPAK 9K-18K BTU/h Models
20
19
18
22
21
52
9K-18K BTU/h Models 2011 VPAK Parts List
Model
Part Number
Part Descripꢀon
1
1
1
1
1
2
2
3
4
4
4
4
4
4
4
4
5
6
7
7
8
8
9
10
11
12
12
13
13
13
13
*
80074936
80074939
80074938
80074937
80077146
80023703
80023702
60179904
01389903
03760473
01389915
01389985
03760513
03760518
01390212
03760511
80006870
61776900
25076004
25076003
25022022
25022032
91400400
61028900
80050200
80041750
80048150
80041960
80041971
80041970
80048050
61834800
61834801
61804901
80017090
80017091
80017092
80007600
61080521
61080558
61080554
62601008
62601009
62600203
62600205
62600206
62600600
80050601
60610601
60610607
60610605
60542004
80049601
80013807
80001800
80013502
61656200
61656201
80013805
61814800
80029207
61764588
61764585
61764562
COMPRESSOR KIT
COMPRESSOR KIT
COMPRESSOR KIT
COMPRESSOR KIT
COMPRESSOR KIT
BASEPAN VPAK
BASEPAN VPAK
CONDENSATE DRAIN VALVE
TUBE CAP (Cooling)
TUBE CAP (Cooling)
TUBE CAP (Cooling)
TUBE CAP (Cooling)
TUBE CAP (Heaꢀng)
TUBE CAP (Cooling)
TUBE CAP (Cooling)
TUBE CAP (Heaꢀng)
FAN MOTOR
MOTOR MOUNT XQ
VALVE CHECK
VALVE CHECK
VALVE REV 4-WAY DUNAN
VALVE REV 4-WAY DUNAN
COMPRESSOR STUD
COMPRESSOR GROMMET
MOTOR RISER
COIL, EVAPORATOR
COIL, EVAPORATOR
COIL, CONDENSER
COIL, CONDENSER
COIL, CONDENSER
COIL, CONDENSER
STRAINER .312 COIL
STRAINER .375 COIL
SHROUD MED W/FD RESTRAINT
HEATER VPAK-A NXT 2.5KW 230V
HEATER VPAK-A NXT 3.4KW 230V
HEATER VPAK-A NXT 5.0KW 230V
NONFUSED DISCONNECT
CAPCTR 25/10 MF 450V
CAPCTR 30/10 MF 370V
CAPCTR 40/10 MF 370V
E-CONTROL MAIN BOARD (Electric Heat)
E-CONTROL MAIN BOARD (Heat Pump)
Sensor ID R/A Temperature (Return Air)
Sensor ID Coil Temperature (Evaporator)
Sensor OD Coil Temperature (Condensor)
DISPLAY SERVICE VPAC KUHL
BRACKET ELECT CTRL KUHL
BLOWER WHEEL
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
3
1
1
3
3
1
1
3
3
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
1
3
3
1
3
3
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
1
3
3
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
*
1
1
1
1
1
1
1
14
15
15
15
16
17
17
17
18
18
*
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
*
*
19
20
21
21
21
22
23
24
25
26
27
*
28
*
*
*
*
BLOWER WHEEL
BLOWER WHEEL
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
FAN PLASTIC 14.5" TA1004
INSUL ASY, LFT FRONT PNL
INSUL ASY RIGHT SIDE PANEL
COLLAR 24 GA.
INSUL ASY TOP COVER
CHANNEL EXHAUST DOOR
SLIDE EXHAUST DOOR
INSUL ASY LEFT SIDE PANEL
CONNECTOR FRESH AIR S/M
ISOLATOR PAD
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
OVERLOAD FSTB B128-155-241E
OVERLOAD MRA12030-12008
OVERLOAD MRA12177-12008
1
1
1
*
1
1
1
53
2011 VPAK 24K BTU/h Models
2
9
8
4
1
6
5
7
3
54
2011 VPAK 24K BTU/h Models
15
23
13
14
10
12
22
11
21
16
19
20
6
18
17
55
2011 VPAK 24K BTU/h Models
24
26
30
29
28
25
14
56
2011 VPAK 24K BTU/h Models
33
32
31
57
24K BTU/h Models 2011 VPAK Parts List
Model
Part Number
80077118
80103450
80101261
80101260
61834800
61834801
03760548
03760507
25076005
60542007
91400400
01150934
80101400
80106201
80102294
80102290
80102291
80102292
80102293
80103200
80106970
61080573
61080580
20709185
80007600
80001800
25022032
25014400
80102170
80114100
80101010
80101300
80106701
80113200
80101500
80101600
80116601
80118400
62601008
62601009
62600203
62600205
62600206
62600600
80116901
80118600
80106400
80106600
61656200
61656201
60179904
80115225
80103600
61814801
80106500
61828203
61828204
Part Descripꢀon
COMPRESSOR KIT
COIL, EVAPORATOR
COIL, CONDENSER
COIL, CONDENSER
STRAINER .312 COIL
STRAINER .375 COIL
TUBE CAP (Cooling)
TUBE CAP (Heaꢀng)
VALVE CHECK
FAN PLASTIC 16" LRG; VPAC
STUD COMPR MTG
GROMMET COMP. #64041
LOWER RIGHT POST
1
2
3
3
*
*
4
4
5
6
6
7
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
3
3
1
1
1
1
1
2
1
1
1
3
3
1
1
1
1
2
1
1
1
3
3
1
1
1
1
2
1
1
1
3
3
1
1
1
1
2
1
1
1
3
3
1
1
2
2
2
2
2
1
3
3
1
1
1
1
3
3
1
1
1
3
3
1
1
1
3
3
1
1
1
3
3
1
1
9
INNER WALL
10
10
10
10
10
11
*
12
12
13
14
15
16
17
18
19
20
21
22
23
*
HEATER VPAK-A24 NXT 10.0KW 230V
HEATER VPAK-A24 NXT 2.5KW 230V
HEATER VPAK-A24 NXT 3.4KW 230V
HEATER VPAK-A24 NXT 5.0KW 230V
HEATER VPAK-A24 NXT 7.5KW 230V
BLOWER HOUSING
MTR 1/4 4 6P CW 1PSC 15.0 BLO WEL (Evap)
CAPCTR 15/5 MF 440V
CAPCTR 50/5/370VAC
CAPACITOR BRACKET
NONFUSED DISCONNECT
COLLAR 24 GA.
VALVE REV 4-WAY DUNAN
MOTOR MOUNT
MTR 1/4 4 6P CCW 1PSC 5.0 BLO WEL
91 SHROUD ASY VPAK 24
SHROUD RING VPAK24
LOWER LEFT POST
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
INSULATED TOP ASSY
TOP COVER INSUL ASYU
UPPER LEFT POST
UPPER RIGHT POST
CONTROL BOX COVER
*
24
25
26
26
*
CONTROL BOX
E-CONTROL MAIN BOARD (Electric Heat)
E-CONTROL MAIN BOARD (Heat Pump)
Sensor ID R/A Temperature (Return Air)
Sensor ID Coil Temperature (Evaporator)
Sensor OD Coil Temperature (Condensor)
DISPLAY SERVICE VPAC KUHL
BRACKET ELECT CNTRL KUHL
CONTACTOR 240V
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
*
*
28
29
30
31
32
33
INSUL ASY RT PANEL
INSUL ASY REAR PANEL
CHANNEL EXHAUST DOOR
SLIDE EXHAUST DOOR
CONDENSATE DRAIN VALVE
BASEPAN ASY PAINT & CAULK
BLOWER BRACKET
CONNECTOR FRESH AIR LRG
INSUL ASY LT PANEL
LIQUID LINE DRIER
LIQUID LINE DRIER (HEATPUMP)
1
1
1
1
1
58
CUSTOMER SATISFACTION and QUALITY ASSURANCE
Friedrich is a conscientious manufacturer, concerned about customer satisfaction, product quality, and
controlling warranty costs.As anAuthorized Service Provider you play a vital role in these areas. By adhering
to the policies and procedures you provide us with vital information on each warranty repair you complete.
This information is used to identify product failure trends, initiate corrective action, and improve product
quality, thereby further reducing warranty expenses while increasing customer satisfaction levels.
FRIEDRICH AUTHORIZED PARTS DEPOTS
AAA Refrigeration Service
1322 24th Street, Suite B
Kenner, Louisiana 70062
504-464-7444
The Gabbert Company
6868 Ardmore
Houston, Texas 77054
713-747-4110
Reeve Air Conditioning, Inc.
2501 South Park Road
Hallandale, Florida 33009
954-962-0252
877-813-7444
800-458-4110
800-962-3383
Alamo Service Company
1450 North Flores Street
San Antonio, Texas 78212
210-227-2450
Johnstone Supply of Woodside
27-01 Brooklyn Queens Expway
Woodside, New York 11377
718-545-5464
800-328-2450
800-431-1143
TECHNICAL SUPPORT
CONTACT INFORMATION
FRIEDRICH AIR CONDITIONING CO.
10001 Reunion Place, Ste. 500, San Antonio, TX 78216
(210) 546-0500 877-599-5665 x 261 FAX (210) 546-0631
Email: tac@friedrich.com
Printed in the U.S.A.
Printed in the U.S.A.
VPK-ServMan-L (4-11)
59
FRIEDRICH AIR CONDITIONING CO.
10001 Reunion Place, Ste. 500, San Antonio, TX 78216
P 210-546-0500 | F 210-546-0731
Printed in the U.S.A.
VPK-ServMan-L (4-11)
|
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