Bryant 619CNQ User Manual

Installation, start-up and  
service instructions  
619CNF  
619CNQ  
Sizes 024-060  
CEILING-SUSPENDED  
FAN COIL UNITS  
Cancels: II 619C-24-3  
II 619C-24-4  
4/15/06  
CONTENTS  
performed by trained service personnel. When working on  
air-conditioning equipment, observe precautions in literature  
and on tags and labels attached to unit.  
Page  
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Follow all safety codes. Wear safety glasses and work gloves.  
Use quenching cloth for brazing operations. Have fire  
extinguisher available. Read these instructions thoroughly.  
Consult local building codes and National Electrical Code  
(NEC) for special installation requirements.  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17  
I. Step 1 — Complete Pre-Installation  
Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
II. Step 2 — Select Location . . . . . . . . . . . . . . . . . . . . . 4  
III. Step 3 — Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . 6  
IV. Step 4 — Connect Refrigerant Piping . . . . . . . . . . . 7  
V. Step 5 — Connect Condensate Drain Line . . . . . . . 8  
VI. Step 6 — Make Electrical Connections . . . . . . . . . 10  
VII. Step 7 — Install Thermostat . . . . . . . . . . . . . . . . . . 12  
WARNING: Before installing or servicing system,  
always turn off main power to system. There may be  
more than one disconnect switch. Turn off accessory  
heater power if applicable. Electrical shock can cause  
personal injury.  
VIII. Step 8 — Make Connections Between  
Indoor and Outdoor Units . . . . . . . . . . . . . . . . . . . . 15  
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18,19  
I. After Extended Shutdown. . . . . . . . . . . . . . . . . . . . 18  
II. Seasonal Changeovers . . . . . . . . . . . . . . . . . . . . . . 18  
III. Adjusting Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
IV. Operating Mode Memory. . . . . . . . . . . . . . . . . . . . . 18  
V. Automatic Operation (Auto.) Mode. . . . . . . . . . . . . 18  
VI. Operating Sequence . . . . . . . . . . . . . . . . . . . . . . . . 18  
INSTALLATION  
Installation instructions for fan coil units (Fig. 1) are con-  
tained in this manual. Refer to this manual for proper instal-  
lation of the complete system. Note that the outdoor units are  
shipped with installation and service instructions for basic  
installation of the outdoor section. Be sure to make the con-  
nections in Cooling Only Systems and Heat Pump Systems  
sections on page 15 of this literature so that the unit will  
operate properly.  
CLEANING AND MAINTENANCE . . . . . . . . . . . . . . . . . .19,20  
I. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
II. Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
III. Clean Indoor Unit Bottom Panel. . . . . . . . . . . . . . . 20  
IV. Clean Indoor Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
V. Clean Outdoor Coil (Outdoor Unit). . . . . . . . . . . . . 20  
VI. Clean Condensate Drains . . . . . . . . . . . . . . . . . . . . 20  
Refer to Table 1 for proper system matches.  
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
I. Before Calling for Service. . . . . . . . . . . . . . . . . . . . 20  
FRESH AIR INSTALLATION OPTION . . . . . . . . . . . . . . . . . 20  
I. Ventilation-Air Accessory . . . . . . . . . . . . . . . . . . . . 20  
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .20,21  
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . .CL1, CL-2  
SAFETY CONSIDERATIONS  
Installing and servicing air-conditioning equipment can be  
hazardous due to system pressure and electrical components.  
Only trained and qualified service personnel should install or  
service air-conditioning equipment.  
a40-267  
Untrained personnel can perform basic maintenance, such as  
cleaning and replacing filters. All other operations should be  
Fig. 1 — Ceiling-Suspended Fan Coil Unit  
Table 3A — Physical Data, Under Ceiling Cooling Only Units  
SYSTEM SIZE  
018*  
11/2  
18,000  
108  
024  
2
24,000  
108  
030  
3
30,000  
117  
036  
3
36,000  
117  
048  
4
48,000  
149  
060  
5
60,000  
179  
NOMINAL CAPACITY (tons)  
NOMINAL SIZE (Btuh)  
OPERATING WEIGHT (lb)  
MOISTURE REMOVAL WEIGHT  
(Pints/Hr)  
4.0  
7.3  
6.0  
9.0  
13.0  
14.5  
FINISH  
GM Motorhome White with Black Trim  
REFRIGERANT  
Control (Cooling)  
R-410A  
AccuRater Control  
INDOOR FAN  
Direct Drive Centrifugal  
Rpm...Cfm High  
862...500  
690...400  
552...320  
92  
1050…600  
690...400  
552...320  
92  
1275...840  
972...740  
830...640  
282  
1275...840  
972...740  
830...640  
282  
1435...1200  
1388...1160  
1315...1100  
425  
1275...1600  
972...1220  
830...1040  
564  
Rpm...Cfm Medium  
Rpm...Cfm Low  
High Speed Watts  
Motor Quantity  
1
1
1
1
2
2
Blowers — No. ...Size (in.)  
2...6x8  
2…6x8  
2…6x8  
2…6x8  
3…6x8  
4…6x8  
INDOOR COIL  
Face Area (sq ft)  
No. of Rows  
Fins/in.  
Copper Tube, Aluminum Fin  
2.2  
4
14.9  
4
2.2  
4
14.9  
4
2.6  
4
2.6  
4
3.0  
4
14.9  
8
4.0  
4
14.9  
8
14.9  
4
14.9  
4
Circuits  
FILTERS  
Quantity  
Cleanable  
4
4
5
5
6
8
AIRSWEEP  
Horizontal  
Vertical  
User select ON/OFF  
Manual  
CONTROLS  
Control Voltage  
24 V  
Yes  
Auto Restart  
Fan Speed  
Condensate Pump Safety  
Indoor Coil Freeze Protection  
Filter Change Indication  
High/Medium/Low  
Yes (Accessory)  
Standard shutoff at 28 F  
250 Hours of Indoor Fan Operation  
REFRIGERANT LINES  
Connection Type  
Liquid Line OD (in.)  
Vapor Line OD (in.)  
Max Line Length  
Flare  
3
/
8
5
5
3
3
7
/
/
/
/
/
7/8†  
Fo8r maximum line lengths see condens4ing unit instruction8s.  
8
4
CONDENSATE DRAIN  
CONNECTION  
CONDENSATE DRAIN SIZE (in.)  
Pipe Thread (MPT)  
3
/
4
*Field reconfigured to 18,000 Btuh (11/2 tons). See Before Installation  
section on this page for details.  
†The valve connection size is 7/8 inch. The recommended line size is  
11/8 inch.  
I. STEP 1 — COMPLETE PRE-INSTALLATION CHECKS  
A. Unpack Unit  
Store fan coil unit in the original packaging until it is moved  
to the final site for installation. When removing unit from  
carton, lift unit by its 4 corners; DO NOT lift unit by its  
plastic parts.  
B. Inspect Shipment  
Upon receipt of shipment, check fan coil unit for damage.  
Forward claim papers directly to the transportation com-  
pany. Manufacturer is not responsible for damage incurred  
in transit.  
Check all items; if any item is missing, notify your dealer. To  
prevent loss or damage, leave all parts in original packages  
until installation.  
a40-928  
C. Before Installation  
NOTE: Dimensions shown in brackets [ ] are in mm.  
Perform the following steps before installing indoor fan coil  
unit. Place the indoor unit upside down on the floor, then:  
Fig. 2 — Removal of Mounting Brackets  
from Indoor Unit  
1. Remove side panels by sliding forward, then away  
from sides of unit (Fig. 2). Reinstall prior to unit  
start-up.  
2. Remove air filters from inlet grilles; then remove and  
retain screws securing inlet grilles to indoor unit.  
Reinstall prior to unit start-up.  
—3—  
Table 3B — Physical Data, Under Ceiling Heat Pump Units  
UNIT SIZE  
018*  
11/2  
18,000  
110  
024  
2
24,000  
110  
030  
3
30,000  
119  
036  
3
36,000  
119  
048  
4
48,000  
151  
060  
5
60,000  
181  
NOMINAL CAPACITY (tons)  
NOMINAL SIZE (Btuh)  
OPERATING WEIGHT (lb)  
MOISTURE REMOVAL WEIGHT  
(Pints/Hr)  
4.0  
7.3  
6.0  
9.0  
13.0  
14.5  
FINISH  
GM Motorhome White with Black Trim  
REFRIGERANT  
Control (Cooling)  
R-410A  
AccuRater Control  
TXV  
INDOOR FAN  
Direct Drive Centrifugal  
Rpm...Cfm High  
900…480  
862...400  
770...320  
92  
1050…550  
900…480  
862...400  
92  
1275...840  
972...740  
830...640  
282  
1275...840  
972...740  
830...640  
282  
1435...1130  
1388... 975  
1315... 820  
425  
1275...1600  
972...1220  
830...1040  
564  
Rpm...Cfm Medium  
Rpm...Cfm Low  
High Speed Watts  
Motor Quantity  
1
1
1
1
2
2
Blowers — No. ...Size (in.)  
2...6x8  
2...6x8  
2...6x8  
2...6x8  
3...6x8  
4...6x8  
INDOOR COIL  
Face Area (sq ft)  
No. of Rows  
Fins/in.  
Copper Tube, Aluminum Fin  
2.2  
4
14.9  
4
2.2  
4
14.9  
4
2.6  
4
2.6  
4
3.0  
4
14.9  
8
4.0  
4
14.9  
8
14.9  
4
14.9  
4
Circuits  
FILTERS  
Quantity  
Cleanable  
4
4
5
5
6
8
HEATERS (kW)  
2.0  
2.0  
3.0  
3.0  
4.0  
5.0  
AIRSWEEP  
Horizontal  
Vertical  
User select ON/OFF  
Manual  
CONTROLS  
Control Voltage  
Defrost Method  
Dehumidification  
Auto Restart  
24 V  
Timed  
Yes  
Yes  
Fan Speed  
High/Medium/Low  
Condensate Pump Safety  
Filter Change Indication  
Freeze Protection  
Yes (Accessory)  
250 Hours of Indoor Fan Operation  
Indoor coil less than 28 F, resets at 50 F.  
REFRIGERANT LINES  
Connection Type  
Liquid Line OD (in.)  
Vapor Line OD (in.)  
Max Line Length  
Flare  
3
/
8
7/8†  
5
5
3
3
7
/
/
/
/
/
Fo8r maximum line lengths see condens4ing unit instruction8s.  
8
4
CONDENSATE DRAIN  
CONNECTION  
CONDENSATE DRAIN SIZE (in.)  
Pipe Thread (MPT)  
3
/
4
*Field reconfigured to 18,000 Btuh (11/2 tons). See Before Installation  
section on page 3 for details.  
†The valve connection size is 7/8 inch. The recommended line size is  
11/8 inch.  
3. Remove inlet grilles from indoor unit by sliding for-  
ward. Reinstall prior to unit start-up.  
new construction. Plan the installation carefully before you  
begin. Listed below are some guidelines that should be fol-  
lowed when determining location for the unit.  
IMPORTANT: If necessary, reconfigure the 24,000 Btuh fan coil  
unit to 18,000 Btuh. Unplug the fan motor at the control box  
harness and plug into the 619CN018 marked connector.  
1. Place unit adjacent to an outside wall if fresh air is  
required, ensuring that location allows for complete  
air distribution.  
II. STEP 2 — SELECT LOCATION  
2. Locate the thermostat in an area that is not subjected  
to drafts or direct sunlight through windows. Locate  
the thermostat on an internal wall whenever possible.  
Consult local building codes and NEC for special installation  
requirements. See Fig. 3 and 4 for unit dimensions and  
required clearances.  
3. Allow sufficient clearance for airflow, wiring, refriger-  
ant piping, and servicing unit (Fig. 3 and 4).  
There are several ways the unit may be installed to different  
types of ceiling construction. These instructions do not cover  
all installation methods. As a typical installation, these  
instructions focus primarily on mounting the unit to metal in  
4. Make sure the unit is easily accessible to electrical  
power.  
—4—  
NOTES:  
1. Dimensions in [ ] are in millimeters.  
2. Direction of airflow.  
3. Standard unit clearances are as follows:  
• 0on top and rear  
• 3on left side  
• 12on right side  
• 36on bottom  
(When facing unit discharge.)  
b40-437  
WEIGHT (lb)  
Cooling Only Heat Pump  
A
B
E
F
G
UNIT  
SIZE  
ft-in.  
4- 215/16 1294 3-10  
4-1013/16 1493 4- 57/8 1368 4- 91/2 1459  
5-119/16 1817 5- 65/8 1692 5-101/4 1783 1- 97/8 555 3- 31/16 992  
7- 8 2336 7- 3  
2211 7- 65/8 2302 1-115/8 601 4-119/16 1512  
mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm  
024  
036  
048  
060  
108  
117  
149  
179  
110  
119  
151  
181  
1169 4- 15/8 1260  
1- 95/8 549  
2- 11/2 648  
Fig. 3 — Base Unit Dimensions  
—5—  
a40-929  
Fig. 4 — Fan Coil Unit Clearances  
5. Run refrigerant piping as directly as possible and  
avoid any unnecessary turns or bends.  
6. Condensate piping can be directed through the inside  
wall to an approved drain or straight outside.  
NOTE: The piping hole for condensate line must slope at a  
1
minimum pitch of /4 in. per foot to ensure proper drainage.  
If proper pitch cannot be achieved, install accessory conden-  
sate pump at this time.  
III. STEP 3 — MOUNT UNIT  
Refer to Fig. 4 for clearances and dimensions. Use mounting  
template included inside box to locate mounting bolt holes,  
piping holes, electrical connections, and accessory outdoor-  
air intake, if used.  
a40-524  
Select proper type of hardware from the guidelines below.  
See Fig. 5.  
Fig. 5 — Fan Coil Unit Mounting Methods  
(Hardware is Field-Supplied)  
CAUTION: Solid structure in ceiling must be used  
due to the weight of the unit.  
3
unit as shown in Fig. 6. Allow approximately /8-in.  
space between bolt head and unit.  
A. Wooden Structure  
2. Determine installation position, paying particular  
attention to piping lengths, wiring connections, clear-  
ances, etc. See Fig. 3 for connection locations, Fig. 4  
for clearances, and Fig. 7 and 8 for bolt locations.  
Install hanging bolts on a square wooden piece placed over  
beams.  
B. Newly Built Concrete Slab  
3. Open knockout if right-side piping connections are  
required (Fig. 9), by removing the pre-slit portion in  
the rear of the right side panel with a saw or cutter  
knife.  
Install hanging bolts with inserts, embedded bolts, etc.  
C. Metal Structure  
Install hanging bolts utilizing an existing angle or by install-  
ing a new support angle.  
4. Mount hanging brackets on ceiling (Fig. 10) for either  
concealed or exposed bolt hanging position.  
D. Previously Built Concrete Slab  
5. Lift the unit into place, and fit the hex-head bolts on  
sides of indoor unit into mounting slots of mounting  
brackets (Fig. 11). Ensure unit is mounted with a  
slight tilt to the right rear side for proper drainage.  
Install hanging bolts with expansion anchor.  
E. To Mount Unit:  
1. Remove mounting bracket and reinstall the 2 hex-  
head bolts (factory-supplied) into each side of indoor  
6. Tighten indoor unit hex-head bolts securely.  
—6—  
F. To Install Thermostat:  
If there is at least 3/8 in. of space between the back of indoor  
unit and wall:  
1. Route thermostat wires (field-supplied) through slot  
in right side or rear panel of indoor unit (Fig. 3).  
2. Route wires over refrigerant and drain piping as  
shown in Fig. 12.  
IMPORTANT: Do not route wires under the piping, or wires  
could impede air filter removal.  
a40-620  
Fig. 6 — Installing Hex-Head Mounting Bolts  
IV. STEP 4 — CONNECT REFRIGERANT PIPING  
in Fan Coil Unit  
Fan coil units may be connected to outdoor units using field-  
supplied refrigerant grade piping. Refer to Tables 3A and 3B  
for the correct size piping. The length of refrigerant pipe  
depends on the unit placement and building structure; run  
pipes as directly as possible. For piping requirements over  
50 ft of total run, or more than 25 ft of lift, consult the  
Residential Long Line Application Guide.  
CAUTION: DO NOT BURY MORE THAN 36 IN.  
OF REFRIGERANT PIPE IN THE GROUND. If any  
section of pipe is buried, there must be a 6-in. vertical  
rise to the valve connections on the outdoor unit. If  
more than the recommended length is buried, refriger-  
ant may migrate to the cooler, buried section during  
extended periods of unit shutdown, causing refrigerant  
slugging and possible compressor damage at start-up.  
a40-930  
DIMENSIONS (in.)  
UNIT SIZE  
A
B
C
024  
036  
048  
060  
5015/16  
5813/16  
719/16  
92  
46  
495/8  
571/2  
701/4  
905/8  
537/8  
665/8  
87  
Fig. 7 — Fan Coil Unit Hanging Dimensions  
To connect piping:  
1. Install insulation. It is extremely important that all  
refrigerant lines and the metering device be  
insulated on heat pumps and multi-splits. On cooling  
only units, the liquid line may be left uninsulated.  
Use any acceptable heat resistant closed-cell foam  
insulation (minimum 3/8-in. wall thickness). When  
insulating piping, cap ends and slide insulation over  
the piping. Insulation can also be cut and placed over  
piping.  
2. Run liquid and gas refrigerant piping.  
a. Run pipes as directly as possible, and avoid any  
unnecessary turns and bends.  
b. Suspend refrigerant pipes so that the insulation  
is not damaged and vibrations are not transmit-  
ted to the structure.  
c. Leave slack in the refrigerant pipe between the  
structure and the unit to absorb vibrations.  
d. A piston is shipped in the factory-installed  
metering device body (Fig. 13) with the indoor  
unit. Use Tables 4A-4C to verify that you have  
the required piston size for the system being  
installed.  
a40-1464  
DIMENSIONS (in.)  
UNIT SIZE  
B
C
024  
036  
048  
060  
46  
495/8  
571/2  
701/4  
905/8  
537/8  
665/8  
87  
*Exposed mounting holes.  
†Reverse bracket holes (concealed mounting).  
IMPORTANT: The metering device is factory-installed and  
only needs to be replaced for long line applications or if the  
system combination requires it. See Tables 4A-4C. See  
Fig. 13.  
Fig. 8 — Mounting Included with  
Fan Coil Unit  
e. For special applications such as long lines or  
raised elevations, consult the Residential Long  
Line Application Guide for specific system  
requirements. The arrow on the metering device  
body must face away from the indoor coil.  
a40-932  
f. Refer to the outdoor unit Installation, Start-Up and  
Service Instructions for additional information.  
g. Install a factory-supplied filter drier near the  
outdoor unit. On heat pump systems, a bi-flow  
filter drier must be used.  
Fig. 9 — Removing Rear Knockout in Side Panel  
if Right-Side Piping Connection is Used  
—7—  
3. Insulate and caulk wall openings to reduce air infil-  
tration and refrigerant pipe vibrations on structure.  
3. Attach plate with screws under piping hole.  
4. Attach drain pipe with nylon wire tie passing through  
hole (Fig. 15).  
4. Evacuate piping, if necessary. If either refrigerant  
piping or the indoor coil is exposed to atmospheric  
conditions, it must be evacuated to 1000 microns to  
eliminate contamination and moisture in the system.  
NOTE: Do not fasten nylon wire ties tight enough to  
deform the insulation, as this affects its performance.  
5. Insulate condensate drain line(s) that are located in  
or above an occupied area with a condensate-proof  
material such as polyurethane or neoprene.  
V. STEP 5 — CONNECT CONDENSATE DRAIN LINE  
Observe all local sanitary codes when installing condensate  
drains. Refer to Fig. 3 and 14 for drain pipe connection from  
indoor unit.  
6. Install an external trap at the end of the condensate  
line.  
1. Use hard polyvinyl chloride (PVC) pipe material with  
NOTE: Should the installation require one,  
condensate pump may be ordered as a field-installed  
accessory.  
a
nominal ID of 3/4 in. to connect at drain line. Use pipe  
1
insulation /4-in. thick, such as Armaflex insulation,  
on exposed piping inside the conditioned space.  
2. To ensure regular flow of condensate water, the drain  
pipe should be pitched toward an open drain or sump  
at a downward slope of at least 1/4-in. per ft.  
Table 4A — Piston and Charge Combinations — Cooling Only Systems  
COOLING  
INDOOR UNIT SIZE  
OUTDOOR UNIT  
538A  
PISTON  
CHARGE (lb)  
SIZE  
018  
024  
030  
036  
048  
060  
57  
57  
65  
70  
80  
90  
7.0  
7.75  
10.1  
8.9  
12.2  
12.5  
024  
036  
048  
060  
Table 4B — Piston and Charge Combinations — Heat Pump Systems  
HEAT PUMP  
INDOOR UNIT SIZE  
OUTDOOR UNIT  
538B  
PISTON SIZE  
INDOOR  
PISTON SIZE  
OUTDOOR  
CHARGE (lb)  
018  
024  
030  
036  
048  
060  
49  
55  
65  
70  
82  
—*  
40  
43  
55  
63  
73  
80  
7.5  
7.8  
12  
13  
12.2  
12.8  
024  
036  
048  
060  
*Size 060 indoor heat pump systems use a TXV (thermostatic expansion valve), part no. EA36YD250.  
Table 4C — Piston and Charge Combinations — Heat and Cool Systems  
HEAT PUMP  
INDOOR UNIT SIZE  
OUTDOOR UNIT  
538A  
PISTON  
SIZE  
CHARGE (lb)  
018  
024  
030  
036  
048  
060  
57  
57  
65  
70  
80  
—*  
7.0  
7.75  
10.1  
8.9  
12.2  
12.5  
024  
036  
048  
060  
*Size 060 indoor heat pump systems use a TXV (thermostatic expansion valve), part no. EA36YD250.  
—8—  
a40-625  
Fig. 10 — Mounting Hanging Brackets  
MOUNTING  
SLOT  
a40-531  
NOTE: Teflon Seal must face toward the outdoor heat pump unit.  
HEX-HEAD  
BOLT  
a40-933  
Fig. 13 — AccuRater Metering Device at Service Valve  
(Bypass Type Components),  
Fig. 11 — Hanging Fan Coil Unit  
Heat Pump Systems Only  
a40-940  
*Factory-supplied.  
Fig. 12 — Routing Wires Over Piping  
—9—  
VI. STEP 6 — MAKE ELECTRICAL CONNECTIONS  
440-14 of NEC. Some codes allow indoor unit to share discon-  
nect with outdoor unit if disconnect can be locked; check  
local code before installing in this manner.  
Be sure field wiring complies with local building codes and  
NEC, and unit voltage is within limits shown in Table 5.  
1. Route ground and power wires.  
Contact local power company for correction of improper line  
voltage.  
WARNING: According to NEC and most local  
codes, the unit must have an uninterrupted, unbroken  
ground to minimize personal injury if an electric fault  
should occur. The ground may consist of electrical wire  
or metal conduit when installed in accordance with  
existing electrical codes. Failure to follow this warning  
could result in an electric shock, fire, or death.  
WARNING: To avoid personal injury or damage to  
unit, do not make electrical connections until all power  
sources are shut down, locked out, and tagged off.  
Failure to do so could result in personal injury or unit  
damage.  
CAUTION: Operation of unit on improper line volt-  
age constitutes abuse and could affect warranty. Refer  
to Table 5 for permissible operating limits. Do not  
install unit in system where voltage may fluctuate  
above or below permissible limits.  
2. Route line power leads (see Fig. 16) from indoor  
disconnect to the fan coil unit. Place wire through  
hole on the control box (Fig. 17). Connect wire to high  
voltage terminal board (TB1) and ground screw.  
When routing the wire in the unit, use care to keep  
the wire away from refrigerant and condensate  
piping and any sharp edges. The 208/230-v units are  
factory wired for 230-v to 24-v transformer operation.  
For 208-v to 24-v operation, interchange blue (208-v)  
and red (230-v) wires. Cap any unused wires with  
wire nuts.  
NOTE: Use copper wire only between disconnect switch(es)  
and unit.  
NOTE: Install branch circuit disconnect of adequate size to  
handle unit starting current per NEC. Locate disconnect  
within sight of, and readily accessible from, unit, per Section  
Table 5 — Electrical Data*  
FAN  
HEATER  
POWER  
MOCP  
15  
SYSTEM  
TYPE  
UNIT  
SIZE  
MIN WIRE SIZE  
(AWG)  
Motor 1 FLA  
Motor 2 FLA  
kW  
FLA  
MCA  
0.53  
1.60  
2.00  
3.30  
FLA  
0.50  
1.30  
1.60  
2.60  
024†  
036  
048  
060  
024†  
036  
048  
060  
0.5  
1.3  
1.1  
1.3  
0.5  
1.3  
1.0  
1.3  
0.5  
1.3  
0.5  
1.3  
14  
14  
14  
14  
14  
14  
12  
10  
15  
15  
15  
15  
20  
25  
30  
COOLING  
ONLY  
2.00  
3.00  
4.00  
5.00  
8.66  
13.00  
17.40  
21.70  
9.29  
9.16  
17.70  
23.80  
28.70  
14.30  
19.00  
24.30  
HEAT PUMP  
LEGEND  
AWG — American Wire Gage  
FLA — Full Load Amps  
MCA — Minimum Circuit Amps per NEC Section 430-24  
MOCP — Maximum Overcurrent Protection  
NEC — National Electrical Code  
*All units are 208/230-1-60. Minimum operating voltage is 187, maxi-  
mum is 253. Units will operate satisfactorily within this voltage range.  
†Electrical data is the same for both the 24,000 Btuh 024 unit and the  
024 unit that has been field-reconfigured for 18,000 Btuh. Refer to  
Before Installation section on page 3 for reconfiguration details.  
—10—  
a40-1635  
LEGEND  
NOTES:  
1. All piping must follow standard refrigerant piping techniques.  
2. All wiring must comply with the applicable local and national codes.  
3. Liquid line need not be insulated (cooling only units).  
4. Wiring and piping shown are general points-of-connection guides  
only and are not intended for a specific installation.  
φ
Phase  
NEC — National Electrical Code  
Piping  
Line Voltage  
24 V  
5. Insulate condensate line if run above a conditioned space.  
7. Metering device is provided.  
Thermistor  
*Standard.  
†Accessory item.  
**Field supplied.  
††Insulate for heat pump application.  
Fig. 14 — Component Location (Typical Ceiling-Suspended System)  
—11—  
VII. STEP 7 — INSTALL THERMOSTAT  
These systems use a 3-speed thermostat. The thermostat  
monitors the system operation and controls the operating  
mode. To change settings or refer to the thermostat Operat-  
ing Instructions.  
Mount thermostat to a wall in the occupied space using 2  
field-supplied screws. Locate the thermostat in an area that  
is not subjected to drafts or direct sunlight through windows.  
Locate thermostat on an interior wall whenever possible.  
Figure 18 shows available thermostats.  
a40-935  
LEGEND  
TB — Terminal Block  
Fig. 16 — Line Power Connections  
a40-630  
Fig. 15 — Routing Drain Piping  
—12—  
a40-941  
LEGEND  
ASM  
ASR  
Air Sweep Motor  
Air Sweep Relay  
NEC  
PL  
National Electrical Code  
Plug  
Terminal Block  
EQUIP GND Equipment Ground  
TB  
Terminal Board  
Factory Wiring  
FL  
Fuse Link  
TRAN — Transformer  
FPT  
HP  
Freeze Protection Thermostat  
Heat Pump  
Field Power Wiring  
Field Control Wiring  
Terminal (Marked)  
HR  
Heater Relay  
Heater  
Terminal (Unmarked)  
Splice  
HTR  
HTT  
IFM  
Printed Circuit Board  
Heater Temp. Thermostat  
Indoor-Fan Motor  
Accessory or Optional Wiring  
NOTES:  
1. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.  
2. Wire in accordance with NEC and local codes.  
3. Transformer is thermally protected and will reset automatically.  
4. Indoor-fan motor(s) are inherently thermally protected.  
Fig. 17 — Control Circuit Connections Arrangement  
—13—  
COOL  
HEAT  
AUTO  
a40-1385  
a40-1384  
SLIMLINE THERMOSTAT  
HEAT PUMP  
FLAT THERMOSTAT (FLATSTAT)  
COOLING ONLY  
COOLING ONLY  
HEAT & COOL  
HEAT & COOL  
(53DFS250-FS-BRY)  
(53DFS250-SL-BRY)  
a40-1386  
COOL  
AUTO  
HEAT  
5-1-1 PROGRAMMABLE THERMOSTAT  
COOLING ONLY  
HEAT & COOL  
(53DFST2-NP-BRY)  
Fig. 18 — Thermostats  
—14—  
VIII. STEP 8 — MAKE CONNECTIONS BETWEEN INDOOR  
AND OUTDOOR UNITS  
to Y, R to R, O to O, W2 to W2, and C to C with the wires. See  
Fig. 21.  
The thermostat is wired between the indoor and outdoor  
units to make the system complete.  
The heat pump unit uses a timed defrost method. The timed  
defrost can be field set for 30, 50, or 90 minutes. The timed  
defrost is factory set for 90 minutes.  
A. Check AccuRater Metering Device  
The correct AccuRater (bypass type) refrigerant control is  
required for system capacity optimization. An AccuRater  
device (see Fig. 19) is supplied with the outdoor unit. Refer to  
Tables 4A-4C to determine the correct AccuRater piston size  
and charge combination required for the condenser/evaporator  
system being installed.  
Piston style as shown in Fig. 19 is shipped with the unit. Do  
not interchange components between the AccuRater device  
types.  
a38-6777  
B. Cooling Only Systems  
538A018-060  
The following connections must be made to the outdoor unit  
for it to operate as a system with the indoor unit:  
Route 2 wires of field-supplied 18-gage AWG (American Wire  
Gage) thermostat cable between the low-voltage terminal  
block of the fan coil unit and the blue and brown low-voltage  
wires in the outdoor unit low voltage terminal block. Connect  
the wires Y1 to Y and C to C. See Fig. 20.  
C. Heat Pump Systems  
The following connections must be made to the outdoor unit  
for it to operate as a system with the indoor unit:  
a38-6758  
538B018-060  
Route 5 wires of field-supplied 18-gage AWG thermostat  
cable between the low-voltage terminal block of the fan coil  
and the outdoor unit low-voltage terminal block. Connect Y1  
Fig. 19 — AccuRater (Bypass Type)  
Metering Device Components  
—15—  
538A  
619CNF,CNQ  
619CNF,CNQ  
538A  
a40-1636  
Fig. 20 — Cooling System Wiring Diagram  
—16—  
538B  
619CNQ  
619CNQ  
538B  
a40-1637  
Fig. 21 — Heat Pump Wiring Diagram  
—17—  
START-UP  
cooling to heating (heat pump system only) depending on the  
selected temperature. Auto. mode also controls fan speed if  
not manually overridden.  
WARNING: Never operate unit without a filter or  
with grille removed; damage to the unit or personal  
injury may result.  
NOTE: Between the cooling cycle and the heating cycle there  
is a neutral zone of approximately 2° F above and 2° F below  
the selected temperature when only the fan is operating.  
Make the following checks and complete the Start-Up Check-  
list on page CL-1 before system start-up. Also refer to  
the condensing unit Installation, Start-Up and Service  
Instructions for system start-up instructions and refrigerant  
charging methods.  
VI. OPERATING SEQUENCE  
Ceiling-suspended fan coil units have a relay board which  
controls system operation in response to a room thermostat.  
The user may manually select any one of 3 fan speeds for  
unit operation. Ceiling-suspended systems may be equipped  
with an accessory power ventilation kit and/or condensate  
pump.  
1. Check condensate drainage system:  
a. Remove grille and frame from the unit.  
b. On the opposite side of the drain connection,  
insert a water bottle up into the fan coil unit and  
fill drain pan. Refer to Fig. 22. Water must flow  
steadily; if not, check the pipe slope or inspect for  
any pipe restrictions.  
A. Fan Operation  
Fan coils are capable of 3-speed operation. See thermostat  
instructions for fan speed selection. When the fan(s) is oper-  
ating in medium or high speed and the unit is equipped with  
the power ventilation kit, the ventilation fan will operate to  
provide fresh air.  
2. Make sure that all wiring connections are correct and  
that they are tight.  
B. Cooling Mode Operation  
3. Check that all barriers, covers, and panels are in  
place. Ensure that the filters and return-air grilles  
have been installed and that the discharge louvers  
are positioned correctly.  
When the room thermostat senses a demand for cooling, the  
fan coil relay board is energized. The indoor fan(s) will start  
in the selected speed (if it is not already operating). The  
reversing valve (heat pump only) will energize for cooling  
operation.  
I. AFTER EXTENDED SHUTDOWN  
If the system has been turned off for more than 12 hours and  
a crankcase heater is being used, turn on the indoor and  
outdoor unit disconnect switches to supply power to the  
system for 12 hours BEFORE starting the system.  
The internal condensate pump (if so equipped) runs when-  
ever the reversing valve is energized (heat pump only) and/  
or the unit is in cooling. As long as the condensate float  
switch and freeze protection thermostat are closed, the cool-  
ing relays in the fan coil unit will close. This energizes the  
compressor and outdoor fan in the outdoor unit. The com-  
pressor will continue to operate until the room thermostat is  
satisfied. When the cooling demand is satisfied, the compres-  
sor and outdoor fan will stop. If the system is in the AUTO.  
position, the indoor fan will stop with the compressor. If the  
unit has the accessory ventilation kit, the ventilation fan will  
operate whenever the indoor fan is set for medium or high  
speed.  
II. SEASONAL CHANGEOVERS  
When changing heat pump system from cooling to heating or  
heating to cooling, or before starting cooling only system  
after it has been out of use for the winter season, perform the  
following steps BEFORE starting the system:  
1. Inspect and clean the outdoor unit, particularly the  
coil.  
2. Clean or replace the air filters in the indoor unit.  
C. Heat Pump Operation  
3. Clean the indoor unit drain pan and drain pipe, and  
remove any obstructions.  
When the room thermostat senses a demand for heating the  
indoor fan will start in the selected speed (if not already  
operating), and the reversing valve will not be energized.  
The internal condensate pump (if supplied) and freeze  
protection thermostat are not operated during heating  
operation. The control relay (CR2) closes, and the compres-  
sor and outdoor fan are energized through the defrost board  
(DFB), which is located in the outdoor unit. The microproces-  
sor logic in the DFB is energized when the compressor starts,  
and the defrost timer runs. Once every 90 minutes (factory  
default setting) of compressor run time, the DFB logic checks  
the defrost thermostat (DFT). If the DFT is open, the unit  
continues in heating operation. If the DFT is closed, the DFB  
switches the unit to defrost mode. The timing on the DFB  
may be set at either 30, 50, or 90 minutes.  
4. If the outdoor unit is equipped with a crankcase  
heater, turn on indoor and outdoor unit disconnect  
switches to supply power to the system 12 hours  
before starting the system.  
III. ADJUSTING AIRFLOW  
A. Automatic Air Sweep  
All units are equipped with an air sweep feature which  
directs the airflow louvers up and down to provide optimum  
room air circulation. The air sweep function can be con-  
trolled by the toggle switch located on the lower right corner  
of the unit. If using a thermostat with an air sweep switch,  
see Fig. 20 and 21 for wiring modifications.  
IV. OPERATING MODE MEMORY  
D. Defrost (Heat Pump Only)  
After the system is turned off or after a power failure, the  
system remains in the last operating mode selected. When  
the system is turned back on, or when power is automati-  
cally restored, operation continues in the same operating  
mode as when the system shut down.  
The DFB energizes the RVS (reversing valve solenoid), and  
the reversing valve switches to the cooling position. The K1  
relay on the DFB opens and the outdoor fan stops. The W2  
contact on the DFB is also energized, which in turn  
energizes the defrost relay on the fan coil relay board, turns  
off the electric heater and stops the indoor fan.  
V. AUTOMATIC OPERATION (AUTO.) MODE  
If auto. mode is selected, the system automatically switches  
over the operating mode from heating to cooling, or from  
—18—  
The DFB logic checks the 10-minute defrost timer and the  
DFT. If the DFT opens in less than 10 minutes, the DFB  
switches the unit back to normal heating operation. If the  
DFT remains closed, the DFB switches the unit back to  
heating operation after 10 minutes. When the DFB changes  
back to heating mode, the RVR (reversing valve relay) is  
deenergized and the reversing valve switches back to  
heating operation. Both the outdoor and indoor fans come  
back on, and if necessary, the electric heater also turns on.  
E. System Safeties  
The system is equipped with the following safety devices to  
protect system components:  
a40-635  
Indoor coil freeze protection thermostat — If a coil tempera-  
ture of 28 F or lower is sensed, the compressor and outdoor  
fan will be shut down until the coil temperature exceeds  
28 F. The indoor fan will continue to run.  
Fig. 22 — Inserting Water into Drain Pan  
CAUTION: Do not wash filter in water over 120 F  
(to avoid shrinkage). Do not expose filter to fire (to  
avoid fire damage). Do not expose filter to direct  
sunlight. Clean filter more frequently when air is  
extremely dirty.  
Condensate float switch (units equipped with accessory  
condensate pump, cooling cycle only) — If the level of  
condensate in the drain pan rises too high, the condensate  
float switch will turn the system off.  
F. Special Operation, Heating  
For proper system operation, perform the cleaning and main-  
tenance operations in Table 6.  
Outdoor cooling units may be matched with heat pump  
ceiling-suspended fan coil units to provide supplemental  
electric heat. All other operation is the same as a cooling-  
only system, except these units have heating capability as  
follows:  
I. LUBRICATION  
The indoor-fan, automatic air sweep, and the outdoor-fan  
motors are factory lubricated and require no oiling.  
When the room thermostat initiates a call for heating, the  
electric heater is turned on. The indoor unit fan will start at  
the same time, if it was not already running.  
II. AIR FILTERS (FIG. 23)  
CAUTION: Operating the system with dirty air fil-  
ters may damage the indoor unit and, in addition, can  
cause reduced cooling performance, intermittent system  
operation, frost build-up on the indoor coil, and blown  
fuses. Inspect and clean or replace the air filters  
monthly.  
When the heating requirement is satisfied, the room thermo-  
stat will open, and the heater will turn off.  
CLEANING AND MAINTENANCE  
CAUTION: To avoid the possibility of electric  
shock, before performing any cleaning and mainte-  
nance operations, always turn off power to the system  
by pressing the mode button on the remote thermostat  
until the display shows “OFF,” and turning off the out-  
door disconnect switch located near the outdoor unit. If  
the indoor unit is on a separate switch, be sure to turn  
this disconnect off as well.  
A. Remove Air Filters  
Remove filters by pulling them straight out.  
B. Clean Or Replace Filters  
Filters can be vacuumed or washed in warm water. Shake fil-  
ter to remove any excess water, and replace by sliding filter  
behind grille until filter snaps in place. Refer to Fig. 23.  
If the filter has begun to break down or is torn, replace it.  
Replacement filters are available through your dealer.  
Table 6 — Cleaning and Maintenance Schedule  
TASK  
MONTHLY  
QUARTERLY  
YEARLY  
INDOOR UNIT  
Clean Air Filters  
Clean Drain Pipe  
X
X
Clean Condensate Drain Pan  
Clean Indoor Coil  
Clean Indoor Unit Front Panel  
X
X
X
X
OUTDOOR UNIT  
Clean the Fins From Outside  
Open the Unit and Clean Fins Inside  
Remove Dust From Electrical Parts  
Check Electrical Connections are Tight  
Clean Outdoor Fan  
X
X
X
X
X
X
Clean Outdoor Coil  
Check that Outdoor Fan Assembly is Tight  
Clean Drain Pan  
X
NOTE: Maintenance procedures for the outdoor units are in the individual unit installation instructions.  
—19—  
III. CLEAN INDOOR UNIT BOTTOM PANEL  
If the bottom panel of the unit becomes dirty or smudged,  
wipe the outside of the panel with a soft dry cloth. Use a mild  
liquid detergent and wipe off carefully with a dry cloth.  
IV. CLEAN INDOOR COIL  
To clean the coil, remove indoor unit bottom panel and vac-  
uum the coil fins, using care not to bend or damage fins.  
V. CLEAN OUTDOOR COIL (OUTDOOR UNIT)  
WARNING: Some metal parts and sharp fins of  
outdoor unit coil can cause personal injury during  
cleaning. Clean coil carefully.  
To clean the outdoor coil:  
1. Remove any dirt or obstruction from discharge  
opening.  
2. Use a garden hose to spray water on the coil. Debris  
that collects between coil fins inhibits heat transfer  
— direct the water spray between coil fins to flush  
out debris.  
a40-636  
Fig. 23 — Cleaning Filters  
VI. CLEAN CONDENSATE DRAINS  
2. Press Mode button until OFF is displayed. Wait  
5 minutes.  
Clean all drains and drain pans at the start of each cooling  
season. Check the flow by pouring water into the drain.  
3. Press Mode button until either COOL or HEAT is  
displayed (as desired).  
A. Clean Or Replace Drain Pan  
4. Adjust thermostat set point to desired room tempera-  
ture. If system starts within a few minutes, service  
may not be necessary. If system does not operate  
properly, check Table 7 for typical solutions.  
1. Place a plastic sheet on the floor to catch any water  
that may spill from drain pan.  
2. Remove the intake grille and distribution assembly  
(attached).  
A. If System Fails To Operate  
3. Remove the condensate water in the drain pan by  
letting water drain into a 3-gallon bucket.  
Be sure:  
• unit ON/OFF switch is in ON position  
• fuse or circuit breaker is not tripped  
CAUTION: Do not use a screwdriver to pry drain  
pan out of assembly — it could damage the pan.  
FRESH AIR INSTALLATION OPTION  
The units have an installation option, which allows for field  
installation of fresh air ventilation. Plan the installation  
carefully. Before beginning, measure carefully and follow  
acceptable building practices, NEC, and local codes.  
4. Remove the 4 screws holding the drain pan.  
5. Carefully hold the drain pan to remove it from the  
assembly.  
I. VENTILATION-AIR ACCESSORY  
SERVICE  
Refer to ventilation air accessory installation instructions.  
WARNING: When servicing unit, turn off all elec-  
tric power to unit to avoid shock hazard or injury from  
rotating parts.  
TROUBLESHOOTING  
If the under-ceiling fan coil unit fails to start or operate prop-  
erly, sometimes the problem is minor and can be handled  
without a service call. Refer to Table 7 for some common  
problems, causes, and typical solutions. See Fig. 20 and 21  
for additional system troubleshooting details. If the problem  
cannot be corrected, contact a local dealer for further  
assistance.  
CAUTION: Do not vent refrigerant to atmosphere  
when servicing unit. Recover refrigerant during sys-  
tem repair or unit removal.  
I. BEFORE CALLING FOR SERVICE  
Save the cost of a service call by doing the following:  
1. Be sure main power to system is turned on.  
—20—  
Table 7 — Troubleshooting  
CAUSE  
PROBLEM  
TYPICAL SOLUTION  
System Does Not Start.  
Blown fuse or circuit breaker tripped at building power Replace fuse or reset circuit breaker.*  
entry.  
Indoor and/or outdoor unit disconnect switch is off.  
Thermostat is set to night mode.  
Power failure.  
Turn on disconnect switch(es).  
Cancel mode using Day/Night button on thermostat.  
Restore power.  
Unit is in off mode.  
Press Mode button on thermostat until thermostat dis-  
plays the desired unit mode.  
Three-minute time delay is running.  
Wait for 3 minutes.  
Temperature is above or below the selected  
temperature.  
Select new temperature using the thermostat.  
System Does Not Cool Properly.  
System Does not Heat Properly.  
Air filter(s) in indoor unit is dirty or needs to be  
replaced.  
Temperature is set too high or too low.  
Clean or replace air filter(s).  
Reset temperature to desired comfort setting using  
the thermostat.  
Remove obstruction.  
Adjust fan speed to high or auto. using the Fan  
button on the thermostat.  
Clean or replace air filter(s).  
Outdoor unit outdoor coil restricted.  
Fan speed is set too low.  
Air filter(s) in indoor unit is dirty or needs to be  
replaced.  
Temperature is set too high or too low.  
Reset temperature to desired comfort setting using  
the thermostat.  
Outdoor unit outdoor coil restricted.  
Fan speed is set too low.  
Remove obstruction.  
Adjust fan speed to high or auto. using the Fan  
button on the thermostat.  
Outdoor unit outdoor coil is frosted up.  
Check manual defrost timer setting and adjust as nec-  
essary.  
Ice or frost has Formed  
on Indoor Coil.†  
Low outdoor-air temperature.  
Air filter(s) in indoor unit is dirty or needs to be  
replaced.  
Run system in fan-only mode until frost is gone.  
Clean or replace air filter(s).  
Insufficient Airflow.  
Air filter(s) in indoor unit is dirty or needs to be  
replaced.  
Clean or replace air filter(s).  
Fan coil unit coil is blocked.  
Clean air discharge louvers.  
*If fuse blows or circuit breaker trips again after first start attempt, DO NOT attempt to start system again.  
Contact your local dealer for assistance.  
†When outdoor temperature is approximately 55 F or below, indoor coil frosting may occur when system is  
operated in cooling or maximum dehumidification mode. Units are not intended to operate below 55 F with-  
out appropriate accessories.  
—21—  
SERVICE TRAINING  
Packaged Service Training programs are an excellent way to increase your knowledge of the equip-  
ment discussed in this manual, including:  
• Unit Familiarization  
• Installation Overview  
• Maintenance  
• Operating Sequence  
A large selection of product, theory, and skills programs are available, using popular video-based for-  
mats and materials. All include video and/or slides, plus companion book.  
Classroom Service Training which includes “hands-on” experience with the products in our labs can  
mean increased confidence that really pays dividends in faster troubleshooting and fewer callbacks.  
Course descriptions and schedules are in our catalog.  
CALL FOR FREE CATALOG 1-800-644-5544  
[
] Packaged Service Training  
[
] Classroom Service Training  
Copyright 2006 Bryant Heating & Cooling Systems  
Printed in U.S.A.  
CATALOG NO. 02-619C0001-II  
START-UP CHECKLIST  
I. PRELIMINARY INFORMATION  
OUTDOOR UNIT: MODEL NO. ___________________  
INDOOR UNIT: MODEL NO. _____________________  
SERIAL NO. ___________________________________  
SERIAL NO. ___________________________________  
ACCESSORIES: __________________________________________________________________________________  
PISTONS: INDOOR SIZE: ____________  
OUTDOOR SIZE: ____________  
REFRIGERANT PIPING: EQUIVALENT LINE LENGTH: ____________  
LIFT: FAN COIL ABOVE OUTDOOR UNIT? ____________  
FAN COIL BELOW OUTDOOR UNIT? ____________  
II. PRE-START-UP  
INDOOR UNIT (REFER TO OUTDOOR UNIT INSTALLATION INSTRUCTIONS FOR OUTDOOR UNIT  
PRE-START-UP FUNCTIONS)  
IS THERE ANY SHIPPING DAMAGE? ____________  
IF YES, WHERE? ____________________________________  
WILL THIS DAMAGE PREVENT UNIT START-UP? ____________  
IS POWER SUPPLY CORRECT? ____________  
HAS GROUND WIRE BEEN CONNECTED? ____________  
HAS THE CORRECT SIZE FUSE OR HACR BREAKER BEEN PROVIDED? ____________  
ARE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? ____________  
IS THE DISCONNECT SWITCH INSTALLED WITHIN SIGHT OF THE UNIT? ____________  
IS THE LOW-VOLTAGE CABLE (INDOOR TO OUTDOOR UNIT) RUN AND CONNECTED PROPERLY? ____________  
HAS CONDENSATE DRAIN BEEN RUN, SLOPED AND TRAPPED PROPERLY? ____________  
IS FILTER(S) IN PLACE? ____________  
IS UNIT MOUNTED LEVEL? ____________  
IS HEATING PISTON INSTALLED (FIG. 13), THE CORRECT SIZE, AND IN THE CORRECT DIRECTION? ____________  
III. PIPING  
IS A LIQUID LINE SOLENOID INSTALLED IF REQUIRED BY LONG-LINE APPLICATIONS? ____________  
IS FILTER DRIER INSTALLED AT THE OUTDOOR UNIT? ____________  
HAVE LEAK CHECKS BEEN MADE AT THE COMPRESSOR, OUTDOOR UNIT, FLARE CONNECTIONS, FILTER DRI-  
ERS, AND FUSIBLE PLUGS WITH A LEAK DETECTOR?* ____________  
*FIELD PIPING AND ALL TUBING CONNECTIONS MUST BE LEAK TESTED BY THE PRESSURE METHOD  
DESCRIBED IN GENERAL TRAINING FOR AIR CONDITIONING MANUAL (GTAC2), MODULE 5. USE R-22 AT  
APPROXIMATELY 25 PSIG BACKED UP WITH AN INERT GAS TO REACH A TOTAL SYSTEM PRESSURE NOT TO  
EXCEED 245 PSIG.  
HAS PIPING SYSTEM BEEN EVACUATED TO 1000 MICRONS (IF REQUIRED)? ____________  
HAS SYSTEM CHARGE BEEN WEIGHED IN (IF REQUIRED)? ____________  
HAVE SERVICE VALVES BEEN FULLY BACKSEATED? ____________  
CHECK VOLTAGE: IS VOLTAGE WITHIN RANGE SHOWN FOR UNIT (WITH UNIT OPERATING)?  
OUTDOOR ____________  
INDOOR ____________  
CL-1  
START-UP CHECKLIST (cont)  
IV. START-UP  
IF UNIT HAS A CRANKCASE HEATER, HAS IT BEEN ON FOR 24 HOURS? ____________  
MEASURE AND RECORD THE:  
AIR ENTERING OUTDOOR UNIT: ____________ F  
AIR ENTERING INDOOR UNIT: ____________ F  
DISCHARGE LINE TEMPERATURE: ____________ F  
VAPOR LINE TEMPERATURE: ____________ F  
MEASURE AND RECORD THE:  
VAPOR LINE PRESSURE: ____________ PSIG  
DISCHARGE PRESSURE: ____________ PSIG  
THE UNIT SIZED AND IN-  
START-UP  
CHECK-  
LIST  
STALLED PROPERLY? IS THE  
DISCONNECT SWITCH IN-  
I. PRELIMINARY INFORMATION  
STALLED IN SIGHT FROM THE  
UNIT?  
OUTDOOR UNIT: MODEL NO.SERIAL NO.  
INDOOR UNIT: MODEL NO.SERIAL NO.  
IS THE LOW-VOLTAGE CABLE (INDOOR TO OUT-  
DOOR UNIT) RUN AND CONNECTED PROPERLY?  
ACCESSORIES:  
__________________________________________________  
________________________________  
PISTONS (38HDC and  
38QRC SYSTEMS  
ONLY): INDOOR SIZE:  
OUTDOOR SIZE (38QRC  
SYSTEMS ONLY):  
REFRIGERANT PIPING: EQUIVALENT LINE LENGTH:  
(IF OVER 50 FT)*  
LIFT: FAN COIL ABOVE OUTDOOR UNIT (IF OVER 25  
FT)*?  
FAN COIL BELOW OUTDOOR UNIT (IF OVER  
25 FT)*?  
*APPLIES ONLY TO 38HDC AND 38QRC UNITS USING  
LONG-LINES APPLICATIONS. MAXIMUM EQUIVA-  
LENT  
LINE LENGTH FOR 38HDS SYSTEMS IS 50 FT. MAXI-  
MUM LIFT ON 38HDS APPLICATIONS IS 30 FT FROM  
LOWEST SYSTEM POINT TO HIGHEST SYSTEM  
POINT.  
PRE-START-UP  
INDOOR UNIT (REFER TO OUTDOOR UNIT INSTAL-  
LATION INSTRUCTIONS FOR OUTDOOR UNIT PRE-  
START-UP FUNCTIONS)  
IS THERE ANY SHIPPING DAMAGE?  
IF YES, WHERE?  
WILL THIS DAMAGE PREVENT UNIT START-UP?  
IS POWER SUPPLY CORRECT?  
(115-V  
FOR 40QAB024-048, 115 V UNITS; OR 208/230 V FOR  
40QAB024-048, 208/230 V UNITS AND ALL 40QAB060  
AND 40QAE024-060 UNITS. ALL SYSTEMS REQUIRE  
SINGLE-PHASE POWER)  
HAS GROUND WIRE BEEN CONNECTED?  
HAS THE CORRECT SIZE FUSE  
OR HACR BREAKER BEEN PRO-  
VIDED? ARE POWER WIRES TO  
Copyright 2006 Bryant Heating & Cooling Systems  
Printed in U.S.A.  
CL-2  
6-06A  
CATALOG NO. 02-619C0001-II  

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