T h e Q u a l i t y L e a d e r i n C o n d i t i o n i n g A i r
R e s i d e n t i a l S p l i t - 6 0 H z R 4 1 0 A
R e v. : 0 3 A u g u s t , 2 0 1 2
Electrical - Thermostat Wiring
Thermostat Installation
The thermostat should be located on an interior wall in a larger room, away from supply duct drafts. DO NOT locate the thermostat in areas subject to sunlight, drafts or on external walls. The wire access hole behind the thermostat may in certain cases need to be sealed to prevent erroneous temperature measurement. Position the thermostat back plate against the wall so that it appears level and so the thermostat wires protrude through the middle of the back plate. Mark the position of the back plate mounting holes and drill holes with a 3/16” (5mm) bit. Install supplied anchors and secure plate to the wall. Thermostat wire must be 18 AWG wire. Wire the appropriate thermostat as shown in Figure 24 or 25 to the low voltage terminal strip on the DXM2 control board. Practically any heat pump thermostat will work with these units, provided it has the correct number of heating and cooling stages. However, using the communicating thermostat
The
Figure 24: Communicating Thermostat Connection to DXM2 Control
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| DXM2 | WDG | |||
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| Control | Control | ||||||||
| Thermostat |
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| Gnd |
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24Vac Common | C |
| Comm + | A+ |
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24Vac Hot | R |
| Comm - | B- |
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| 24V |
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Thermostat Connections
C24V Common for Control Circuit
R 24V Supply for Control Circuit
A+ | Communications (Positive) |
B – | Communications (Negative) |
GND | Ground |
OD | Outdoor Temperature Sensor |
ID | Indoor Temperature Sensor |
Figure 25: Conventional 3 Heat / 2 Cool Thermostat Connection to DXM2 and
CAUTION!
CAUTION! Refrigerant pressure activated water regulating valves should never be used with ClimateMaster equipment.
CAUTION!
CAUTION! Either a communicating thermostat (7602-
443)or configuration tool
Thermostat
Compressor | Y1 |
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Compressor Stage 2 | Y2 |
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Auxiliary Heat | W |
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Dehumidification | DH |
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Reversing Valve | O |
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Fan | G |
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24Vac Hot | R |
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24Vac Common | C |
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Fault LED | L |
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DXM2 Board
Y1
Y2
W
H
O
G
R
C
AL1
Air Handler
Y1
Y2
W
H
O
G
R
C
AL1
Notes:
1)ECM automatic dehumidification mode operates with dehumidification airflows in the cooling mode when the dehumidification output from thermostat is active. Normal heating and cooling airflows are not affected.
2)DXM2 board DIP switch
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