TM
ClimaDry
ClimaDry Whole House
Dehumidification Option
Tranquility 27
Tranquility 20
Applications Guide
97B0051N01
Revision: 18 April, 2008B
Table of Contents
Model Nomenclature Example
ClimaDry Overview
2
ClimaDry Schematic
7
3
3
3
3
5
6
6
TT Blower Data
8
ClimaDry Benefits
TS ECM Blower Data
TS PSC Blower Data
Reheat Coil Pressure Drop Table
TS Air Coil Face Area Table
Wiring Diagram
9
ClimaDry Features
10
11
11
12
13
14
ClimaDry Applications
ClimaDry Sequence of Operation
ClimaDry Component Functions
ClimaDry Application Considerations
Flushing/Purging Units
Revision History
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Overview
Features Include:
• Modulating reheat for precise control of supply
ClimaDry™ Whole House Dehumidification Overview
Indoor Air Quality (IAQ) and Relative Humidity (RH)
are increasingly becoming design issues that must be
addressed by selecting heating and cooling equipment
with advanced capabilities. The ClimateMaster
air temperatures
• 100% reheat (operates as a whole house
dehumidifier)
• “Neutral” supply air temperature even at part load
(non-design) conditions
• Supply air temperature adjustment, +/- 3°F
[+/-1.7°C] from 72°F [22°C] factory setpoint with
optional potentiometer
ClimaDry™ reheat option (patent pending) offers unique
features unlike anything currently available today.
ClimateMaster’s ClimaDry reheat option is an innovative
means of providing modulating reheat without the
complication of refrigeration controls. ClimaDry is Hot
Gas Generated Reheat, which utilizes one of the biggest
advantages of a water source heat pump (WSHP), the
transfer of energy through the loop piping system.
ClimaDry simply diverts condenser water through a
water-to-air coil that is placed after the evaporator coil.
If condenser water is not warm enough, the internal
“run-around” loop increases the water temperature with
each pass through the condenser coil.
• Integrated factory supplied reheat controls – simply
attach a humidistat or dehumidistat
• Microprocessor (DXM) controls standard
• Ultra simple refrigeration circuit
• All water system eliminates refrigeration circuit
modifications (same refrigeration circuit as units
without ClimaDry)
• Stable refrigeration pressures, even at low EWTs
• All components located inside the cabinet
•
Moves heat of rejection from ground loop to supply
air stream
ClimaDry Benefits
Availability
ClimaDry is like no other reheat option on the market.
Proportional reheat is controlled to the desired leaving
air temperature set point (factory set point of 72°F,
[22°C}), no matter what the loop temperature is. Since
dehumidification operation will occur under less than full
load cooling conditions a good percentage of the time,
it is important to have a reheat function that provides
100% reheat in the spring and fall when the loop is cool.
Supply air temperature is field adjustable to +/- 3°F
[+/- 1.7°C] for even greater flexibility with an optional
potentiometer.
ClimaDry is currently available on ClimateMaster
residential Tranquility27™ (TT) and Tranquility20™ (TS)
series units (vertical and horizontal units only).
ClimaDry Applications
With the ClimaDry option, return air from the space is
conditioned by the air-to-refrigerant (evaporator) coil, then
reheated by the water-to-air (reheat) coil to dehumidify
the air, but maintain the same space temperature (thus
operating as a whole house dehumidifier). The moisture
removal capability of the heat pump is determined by
the unit’s latent capacity rating. Latent Capacity (LC)
equals Total Capacity (TC) minus Sensible Capacity (SC).
For example, at 85°F [29°C] EWT, the moisture removal
capability (latent capacity) of a ClimateMaster size 036
heat pump is 9.6 MBtuh [2.8kW] as shown in figure 1.
Competitors without ClimaDry typically use an on/off
(non-modulating) refrigeration based reheat circuit,
typically referred to as “Hot gas reheat” (HGR). HGR
needs higher condensing temperatures to work well,
typically 85°F [29°C] entering water temperature (EWT).
With HGR, cooler water temperatures produce cooler
supply air temperatures, which could overcool the
space, requiring additional space heating from another
source or a special auto-change-over relay to allow
the unit to switch back and forth between reheat and
heating. Rarely does HGR provide 100% reheat, like
ClimaDry.
Dividing the latent capacity by 1,069 BTU/LB of water
vapor at 80°F DB and 67°F WB [26.7°C DB and 19.4°C
WB] moist air enthalpy, converts the amount of moisture
removal to pounds per hour (multiply pounds per hour
by 0.4536 to obtain kg/hr). Calculations are shown
in figure 1. Most ClimateMaster heat pumps have a
sensible-to-total (S/T) ratio of 0.72 to 0.76. Therefore,
approximately, 25% of the cooling capacity is dedicated
to latent cooling capacity (moisture removal). When
selecting a unit with ClimaDry, the space sensible
and latent loads should be calculated. If the unit will
be used for space cooling, a unit with at least enough
capacity to satisfy the building sensible load should be
selected. If the latent cooling load is not satisfied by
the selection, a larger unit with enough latent capacity
will be required. The ClimaDry Option can be used for
the additional moisture load. If the unit will be used for
dehumidification purposes only, the latent capacity is
A key benefit to ClimaDry is a simple and easy to
troubleshoot refrigerant circuit. No switching valves or
hard to diagnose leaky check valves are utilized. No
unusual refrigerant pressures occur during the reheat
mode. The ClimaDry refrigerant circuit is like every other
ClimateMaster unit (without reheat), so everything the
technician already knows applies to troubleshooting
the ClimaDry refrigeration circuit. Plus, the water loop
portion of the ClimaDry option is easy to understand
and diagnose.
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Table 1: Typical Unit Latent capacity
the only consideration necessary. In this case, sensible
load is immaterial. Example latent capacities for a
typical ClimateMaster heat pump are shown in table 1.
ClimaDry is especially useful in Northern Climates,
where the heat pump may be oversized in the cooling
mode to provide enough heating capacity. Units with
ClimaDry will compensate for these applications
by operating as a whole house dehumidifier when
necessary to maintain space Relative Humidity (RH).
Latent Capacity at 85°F [29.4°C] EWT
Size
18
24
30
36
42
48
60
70
MBtuh
4.7
lbs/hr
4.4
kW
1.4
1.8
2.0
2.8
3.2
3.7
4.5
5.0
kg/hr
2.0
2.6
2.9
4.1
4.7
5.4
6.4
7.2
6.1
5.7
6.8
6.4
9.6
9.0
11.0
12.7
15.2
16.9
10.3
11.9
14.2
15.8
Since the ClimaDry option is internal to the unit,
installation is much easier than a separate whole house
dehumidifier. Plus, an additional compressor and
controls can be eliminated, simplifying the system and
lowering operating and installation costs.
Figure 1: Example Size 036 Performance
Dividing the latent capacity by
1,069 BTU/LB of water vapor at
80°F DB and 67°F WB [26.7°C
DB and 19.4°C WB] moist air
enthalpy, converts the amount
of moisture removal to pounds
per hour (multiply pounds per
hour by 0.4536 to obtain kg/hr).
Calculations are shown in figure 1.
Performance Data
Model 036
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ClimaDry Sequence Of Operation
There are five operational inputs for single stage units
and seven operational inputs for two stage units:
-Fan Only
-1st Stage Cooling
-2nd Stage Cooling
-1st Stage Heating
-2nd Stage Heating
-3rd Stage Heating (If applicable)
-Reheat Mode
A heat pump equipped with ClimaDry can operate
in three modes; cooling, cooling with reheat, and
heating. The cooling/heating modes are like any other
ClimateMaster WSHP. The reversing valve (“O” signal)
is energized in cooling, along with the compressor
contactor(s) and blower relay. In the heating mode the
reversing valve is de-energized. Almost any thermostat
will activate the heat pump in heating or cooling modes.
The DXM microprocessor board, which is standard with
the ClimaDry option, will accept either heat pump (Y,O)
thermostats or non-heat pump (Y,W) thermostats (see
CXM/DXM AOM for detailed DXM information).
•
Fan Only: A (G) call from the thermostat to the (G)
terminal of the DXM control board will bring the unit
on in fan only mode.
•
1st Stage Cooling: A simultaneous call from (G),
(Y1), and (O) to the (G), (Y1), (O/W2) terminals of the
DXM control board will bring the unit on in 1st Stage
Cooling.
The reheat mode requires either a separate humidistat/
dehumidistat or a thermostat that has an integrated
dehumidification function for activation. The DXM
board is configured to work with either a humidistat or
dehumidistat input to terminal “H” (DIP switch settings
for the DXM board are shown below in table 2). Upon
receiving an “H” input, the DXM board will activate the
cooling mode and engage reheat. Table 3 shows the
relationship between thermostat input signals to the DXM
board and unit operation.
Table 2: Humidistat/Dehumidistat Logic and DXM 2.1, 2.2., 2.3 DIP settings
Sensor
2.1
2.2
OFF
ON
2.3
Logic
Reheat (ON) - H
0 VAC
Reheat (OFF) - H
24 VAC
Humidistat
Dehumidistat
OFF
OFF
OFF
OFF
Reverse
Standard
24 VAC
0 VAC
Table 3: ClimaDry Operating Modes
Input
Y23
Output
Y23
Mode
Backup
Elec Heat
O
G
Y1
W
H
O
G
Y1
Reheat
5
5
No Demand
Fan Only
ON/OFF OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF ON/OFF OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
5
5
ON/OFF
ON
ON
ON
ON
OFF ON/OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
Cooling 1st Stage
Cooling 2nd Stage
Cooling & Dehumidistat1
Dehumidistat Only
Heating 1st Stage
Heating 2nd Stage
Heating 3rd Stage4
Heating & Dehumidistat2
ON
OFF
OFF
OFF
ON
ON
ON
ON
ON
OFF
ON
5
5
ON
ON ON/OFF
OFF
ON
ON ON/OFF
5
ON/OFF OFF
OFF
ON
ON
ON
OFF
OFF
ON
OFF
ON
ON
ON
ON
ON
ON
ON
OFF
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
5
5
5
ON/OFF
ON4
ON/OFF
ON
ON
ON4
5
5
5
ON ON/OFF ON/OFF
ON ON/OFF ON/OFF
1Cooling input takes priority over dehumidify input.
2DXM is programmed to ignore the H demand when the unit is in heating mode.
3N/A for single stage units; Full load operation for dual capacity units.
4Single stage unit: W = 2nd Stage backup elec. heat; Two-Stage units: W = 3rd stage backup elec. heat.
5ON/OFF = Either ON or OFF.
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•
2nd Stage Cooling: A simultaneous call from (G),
(Y1), (Y2), and (O) to the (G), (Y1), (Y2), and (O/W2)
terminals of the DXM control board will bring the unit
on in 2nd Stage Cooling. When the call is satisfied
at the thermostat the unit will continue to run in 1st
Stage Cooling until the 1st Stage Cooling call is
removed or satisfied, shutting down the unit.
NOTE: Not all units have two-stage cooling
functionality.
reheat coil during the reheat mode of operation. The
proportional controller sends a signal to the motorized
valve based on the supply air temperature.
The internal loop pump circulates condenser water
through the hydronic reheat coil during the reheat mode
of operation. In this application, the internal loop pump
is only energized during the reheat mode. The Hydronic
Coil is utilized to reheat the air to the setpoint of the
proportional controller. Condenser water is diverted by
the motorized valve and pumped through the hydronic
reheat coil by the internal loop pump in proportion to the
control setpoint. The amount of reheating is dependent
•
•
1st Stage Heating: A simultaneous call from (G) and
(Y1) to the (G) and (Y1) terminals of the DXM control
board will bring the unit on in 1st Stage Heating.
2nd Stage Heating: A simultaneous call from (G), (Y1), on the setpoint and how far from setpoint the supply
and (Y2) to the (G), (Y1), and (Y2) terminals of the
DXM control board will bring the unit on in 2nd Stage
Heating. When the call is satisfied at the thermostat
the unit will continue to run in 1st Stage Heating until
the call is removed or satisfied, shutting down the
unit.
NOTE: Not all units have two-stage heating
functionality. 2nd stage heating for units with
PSC fan and single stage compressor is auxiliary
electric heat (Y, W1, G).
3rd Stage Heating (ECM fan models only): A
simultaneous call from (G), (Y1), (Y2), and (W)
terminals to the (G), (Y1), (Y2), and (W1) terminals
of the DXM board will bring the unit on in 3rd Stage
Heating (compressor plus auxiliary electric heat).
Reheat Mode: A call from the Humidistat/
Dehumidistat to the (H) terminal of the DXM control
board will bring the unit on in Reheat Mode if
there is no call for cooling. When the Humidistat/
Dehumidification call is removed or satisfied the unit
will shut down.
air temperature is. The factory setpoint is 72°F [22°C],
generally considered “neutral” air.
ClimaDry Application Considerations
The reheat coil adds a small amount of resistance to the
air stream. Consult the correction tables on page 8 of
this manual for details.
Unlike most hot gas reheat options, the ClimaDry option
will operate over a wide range of EWTs. Special flow
regulation (water regulating valve) is not required for
low EWT conditions. Temporary, slight overcooling of
the space may result on rare occasions with ground
loop (geothermal) systems during extremely low EWT
conditions. Since dehumidification is generally only
required in cooling, most ground loop systems will not
experience these conditions.
•
•
Water-Source Heat Pumps with ClimaDry should not be
used as make-up air units. These applications require
equipment specifically designed for make-up air.
NOTE: Cooling always overrides Reheat
Mode. In the Cooling mode, the unit cools and
dehumidifies. If the cooling thermostat is satisfied
but there is still a call for dehumidification, the
unit will continue to operate in Reheat Mode.
� CAUTION! �
Water Source Heat Pump systems (including Wa-
ter Loop Heat Pump systems) must have antifreeze
protection to 20°F [-6.7°C] for ClimaDry applications.
The ClimaDry option MUST NOT be used on open
water loop systems, or any system without antifreeze
protection.
ClimaDry Component Functions
The ClimaDry option consists of the
following components:
• Proportional Controller
• Supply Air Sensor
• Motorized Valve
• Internal Loop Pump
• Hydronic Reheat Coil
The Proportional Controller operates on a 24 VAC
power supply and automatically adjusts the water valve
based upon the Supply Air Sensor. The Supply Air
Sensor senses supply air temperature at the blower inlet
providing the input signal necessary for the proportional
control to drive the motorized valve during the reheat
mode of operation. The Motorized Valve is a proportional
actuator/three-way valve combination used to divert
the condenser water from the coax to the hydronic
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Figure 2: ClimaDry Schematic
Water Out
(To Water Loop)
Refrigerant In
(Cooling)
Mixing Valve
Water In
(From Water Loop)
Internal Pump
COAX
Leaving
Air
Refrigerant Out
(Cooling)
Entering Air
Note:
All components shown
are internal to the heat
pump unit.
Reheat
Coil
Evaporator Coil
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Table 4: Tranquility27™ Blower Performance Data
Residential
Units Only
Airflow in CFM with wet coil and clean air filter
Max
ESP
(in. wg)
Fan
Motor
(hp)
Cooling Mode
Stg 1 Stg 2 Fan
Dehumid Mode
Stg 1 Stg 2 Fan
Heating Mode
Stg 1 Stg 2 Fan
Aux/
Emerg
Mode
Tap
Setting
AUX
CFM
Model
0.50
0.50
0.50
0.50
0.50
0.50
0.50
0.50
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
810
725
950
850
475
425
370
300
700
630
540
450
870
780
670
560
1020
920
790
660
630
560
490
740
660
570
475
425
370
920
825
1060
950
475
425
370
300
700
630
540
450
870
780
670
560
1020
920
790
660
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
1060
950
026
620
730
710
820
820
520
610
600
690
690
1120
1000
860
1400
1250
1080
900
870
780
670
1090
980
700
630
540
1120
1000
860
1400
1250
1080
900
1400
1350
1350
1350
1850
1660
1430
1350
2280
2040
1750
1470
038
049
064
840
730
730
1460
1300
1120
940
1730
1550
1330
1120
2050
1825
1580
1320
1140
1020
870
1350
1210
1040
870
780
670
1560
1400
1200
1010
1860
1650
1430
1200
1850
1650
1430
1200
2280
2050
1750
1470
1
1
1
1
1670
1500
1280
1080
1300
1160
1000
1600
1430
1230
1020
920
1
1
790
1
Factory shipped on Tap Setting 2
During Auxiliary operation (residential units only) the CFM will run at the higher of the heating or AUX settings
Airflow is controlled within +/- 5% up to Max ESP shown with wet coil and standard filter
Tranquility27™ (TT) Series with ClimaDry Reheat Option
All Tranquility 27™ (TT) units have an ECM fan motor as a standard feature. The small
additional pressure drop of the reheat coil causes the ECM motor to slightly increase RPM to
overcome the added pressure drop, and maintain selected CFM up to the maximum ESP.
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Table 5: Tranquility20™ ECM Blower Performance Data
Residential
Units Only
Airflow in CFM with wet coil and clean air filter
Max
ESP
(in. wg)
Fan
Motor
(hp)
Cooling Mode
Stg 1 Stg 2 Fan
Dehumid Mode
Stg 1 Stg 2 Fan
Heating Mode
Stg 1 Stg 2 Fan
Aux/
Emerg
Mode
Tap
Setting
AUX
CFM
Model
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
620
570
750
700
380
350
310
270
470
420
360
300
560
500
450
400
700
630
540
450
790
700
640
560
870
780
720
640
1030
910
850
790
1100
980
880
790
480
450
400
590
550
480
380
350
310
620
570
750
700
380
350
310
270
470
420
390
340
560
500
450
400
700
630
540
450
790
700
640
560
865
775
720
640
1030
910
850
790
1100
980
880
790
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
750
700
018
0.50
0.50
0.50
0.50
0.50
0.75
0.75
0.75
1/2
1/2
1/2
1/2
1/2
1
510
620
510
620
650
430
530
430
530
650
780
950
610
540
490
740
660
600
470
420
360
870
1060
950
1060
950
700
850
780
024
030
036
042
048
060
070
630
770
670
820
820
550
670
570
690
690
920
1130
1000
900
720
640
580
880
780
700
560
500
450
1000
900
1230
1100
980
1230
1100
980
820
740
800
660
800
700
850
850
1150
1020
890
1400
1250
1080
900
900
800
690
1090
980
700
630
540
1150
1020
890
1400
1250
1080
920
1400
1350
1350
1350
1580
1400
1350
1350
1850
1650
1450
1350
2280
2050
1800
1550
2230
2100
1950
1780
840
740
750
1290
1150
1050
920
1580
1400
1280
1120
1730
1550
1440
1280
2050
1830
1700
1580
2230
1950
1750
1580
1010
900
1230
1090
1000
790
700
640
1290
1150
1020
900
1580
1400
1240
1080
1850
1650
1450
1250
2280
2050
1800
1550
2230
2100
1950
1780
820
1420
1270
1180
1050
1680
1500
1400
1300
1830
1600
1440
1200
1110
990
1350
1210
1120
870
780
720
1520
1350
1190
1020
1870
1680
1480
1270
1830
1720
1670
1460
920
1310
1170
1090
1600
1420
1330
1030
910
1
850
1420
1250
1120
1740
1520
1360
1100
980
1
880
See ECM control section for details on setting taps.
Tranquility20™ (TS) Series with ClimaDry Reheat Option (ECM Motor)
All Tranquility 20™ (TS) units with optional ECM fan motor automatically adjust for the reheat coil. The
small additional pressure drop of the reheat coil causes the ECM motor to slightly increase RPM to
overcome the added pressure drop, and maintain selected CFM up to the maximum ESP.
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Table 6: Tranquility20™ (TS) Series PSC Blower Performance Data
(Without ClimaDry)
Airflow (cfm) at External Static Pressure (in. wg)
Fan
Rated
Min
Model
Speed Airflow CFM
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 1.00
HI
600
600
450
450
704
602
531
965
841
723
708
601
529
960
833
715
711
599
527
954
825
707
702
590
522
943
817
703
693
581
517
931
809
698
692
583
512
923
800
689
690
585
506
914
790
680
683
579
501
898
777
668
675
573
495
882
763
656
658
560
479
862
747
642
640
547
462
842
731
627
598
492
515
018
MED
LOW
HI
600
450
850
600
794
686
725
623
635
753
024
030
036
042
048
060
070
MED
LOW
HI
850
600
850
600
950
750
1271 1250 1229 1207 1185 1164 1143 1118 1093 1061 1029 953
875
MED
LOW
HI
950
750
1048 1037 1025 1016 1007 994
890 887 884 879 874 865
981
855
962
842
943
829
915
809
886
789
822
950
750
1250
1250
1250
1400
1400
1400
1600
1600
1600
1950
1950
1950
2100
2100
2100
900
1411 1407 1402 1390 1378 1370 1361 1326 1290 1248 1205 1083 942
1171 1164 1156 1145 1133 1113 1092 1064 1035 997 958
983 967 950 943 936 936
MED
LOW
HI
900
900
1050
1050
1050
1200
1200
1200
1500
1500
1500
1800
1800
1800
1634 1626 1618 1606 1594 1583 1571 1539 1507 1464 1420 1265 1078
1332 1323 1314 1298 1282 1263 1243 1206 1169 1115 1060
1130 1109 1088 1086 1084 1066 1048 1052 1055
MED
LOW
HI
1798 1781 1764 1738 1711 1688 1665 1630 1595 1555 1514 1420 1239
1384 1382 1379 1375 1371 1356 1341 1318 1294 1261 1227
MED
LOW
HI
2311 2306 2300 2290 2279 2268 2257 2233 2209 2175 2140 2088 1990 1901 1856 1752
2058 2049 2039 2028 2016 2000 1983 1966 1949 1935 1920 1874 1807 1750 1670 1582
1868 1863 1858 1858 1858 1848 1838 1822 1806 1799 1792 1749 1699 1636 1570
2510 2498 2486 2471 2455 2440 2424 2401 2377 2348 2318 2247 2161 2078 1986 1855
2171 2167 2162 2162 2162 2158 2153 2135 2117 2101 2085 2024 1971 1891 1823
2010 2008 2006 2006 2006 2006 2006 1992 1977 1962 1947 1892 1851
MED
LOW
HI
MED
LOW
Black areas denote ESP where operation is not recommended.
Units factory shipped on medium speed. Other speeds require field selection.
All airflow is rated and shown above at the lower voltage if unit is dual voltage rated, e.g. 208V for 208-230V units.
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Table 7: ClimaDry Reheat Coil Pressure Drop - TS Units (PSC Motor)
TSH/V/D with Reheat ESP Loss
Coil Face
TSH/V/D
TSH/V/D
TSH/V/D
TSH/V/D
TSH/V/D
060, 070
Velocity
018
024, 030
036
042, 048
FPM
In. of Water
In. of Water
In. of Water
In. of Water
In. of Water
200
250
300
350
400
450
500
0.037
0.052
0.077
0.113
0.181
0.242
0.360
0.033
0.046
0.066
0.096
0.160
0.226
0.345
0.031
0.042
0.059
0.085
0.145
0.215
0.335
0.028
0.038
0.051
0.073
0.131
0.205
0.326
0.026
0.034
0.044
0.061
0.117
0.194
0.316
For TS units with ClimaDry Reheat coil applications, calculate face velocity of the entering air. From the table above, find ESP for Reheat application.
The loss includes wet coil loss.
Example:
Reheat coil pressure drop can be determined from the above table. Coil velocity (FPM) = Airflow (CFM) / Face Area (sq. ft.).
1) TSH036 has a face area of 4.86 sq. ft. (see physical data table in I.O.M.).
2) At 1,100 cfm, coil velocity (FPM) = 1,100 / 4.86 = 226 FPM.
3) From above table, it will be necessary to subtract 0.037 from the blower performance ESP.
4) On medium speed, the TSH036 (without reheat - see blower table) can deliver 1,100 CFM at 0.28 in. wg. with the
standard PSC motor; with the reheat coil, it now delivers 1,085 CFM at 0.28 in. wg. or 1,100 CFM at 0.24 in. wg.
5) If the decrease in airflow is acceptable, no changes are necessary. Otherwise, high speed fan should be used
to overcome the pressure drop of the reheat coil.
Table 8: TS Air Coil Face Area
018
024
030
036
042
048
060
070
Model
Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert.
Coil Face
Area, sq. ft.
(sq. m)
3.38
3.33
3.88
3.89
3.88
3.89
4.86
4.86
5.56
5.56
5.56
5.56
6.25
6.25
6.25
6.25
(0.3135) (0.3097) (0.3600) (0.3613) (0.3600) (0.3613) (0.4516) (0.4516) (0.5161) (0.5161) (0.5161) (0.5161) (0.5806) (0.5806) (0.5806) (0.5806)
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Tranquility27™ with ClimaDry™ Electrical Wiring Diagram - 96B0037N74
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Flushing/Purging Units with ClimaDry
Units equipped with ClimaDry must be flushed/purged
with a flush cart. Detailed general flushing /purging
instruction can be found in the Flow Controller III IOM.
The unit must be powered (but not operating) during
flushing/purging. Unit power is required to operate
the three-way modulating valve during flushing.
Under extreme circumstances this procedure may be
required multiple times to purge all air from the circuit.
After completing the flushing/purging procedure, restore
the red wire to the ACC1 ‘N.O.’ terminal on the DXM for
normal operation. Return the white sensor wire to the
LVTB, if it was removed, as shown in figure 2.
When flushing/purging units equipped with ClimaDry
the earth loop should be fully flushed/purged before
attempting to flush/purge the heat pump. Once the
earth loop is flushed, position the flushing valves to
flush the heat pump. Then with flushing flow re-directed
through the unit, energize the modulating three-way
dehumidification valve to allow flow through the
dehumidification hydronic circuit.
White Thermistor Wire
Red Three-Way Valve Wire
Energize the modulating three-way dehumidification
valve by removing the red wire from the ACC1 ‘N.O.’
terminal on the DXM board. Connect this wire to the
ACC1 ‘NC’ terminal of the DXM controller, as shown
in figure 1, to energize the modulating three-way
dehumidification valve. Once energized, the valve will
take 45 – 75 seconds to fully shift. Continue flushing
during this time. After the valve has completed its shift,
use the air bleed from the top of the reheat coil to purge
air from the coil.
Figure 2. Normal Unit Wiring
Extra care must be taken when using non-pressurized
flow centers to ensure all air is removed from the unit
and no additional air is allowed into the system. If air is
allowed to collect in the ClimaDry piping, nuisance trips
may occur. Additional flush/purge cycles may be used
when required.
Note, if the ClimaDry sensor, located in the supply
air stream is above 70°F it must be disabled to allow
the modulating valve to shift. Disable this sensor by
removing the white wire from the Low Voltage Terminal
Block (LVTB) shown in figure 1.
Figure 1. Flushing/Purging Wiring
White Thermistor Wire
Red Three-Way Valve Wire
De-energize the valve by removing the red wire from the
ACC1 ‘NC’ terminal on the DXM board. The valve will
spring return to its normal position in just a few seconds.
After the valve has fully returned, repeat the process of
running the valve through its cycle and purging air from
the reheat coil.
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Revision Log:
Date
Page # Description
All First Published
18 April, 2008
ISO 9001:2000
Certified
AIR CONDITIONING &
REFRIGERATION
INSTITUTE
TM
Quality: First & Always
35 Earl Martin Dr.
Elmira, ON N3B 3L4
Phone: 800-367-9810
Fax: 877-684-3112
*97B0051N01*
97B0051N01
ClimateMaster works continually to improve its products. As a result, the design and specifications of each product at the time for order may be
changed without notice and may not be as described herein. Please contact ClimateMaster’s Customer Service Department at 1-405-745-6000 for
specific information on the current design and specifications. Statements and other information contained herein are not express warranties and do
not form the basis of any bargain between the parties, but are merely ClimateMaster’s opinion or commendation of its products.
The management system governing the manufacture of ClimateMaster’s products is ISO 9001:2000 certified.
© ClimateMaster, Inc. 2008
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