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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 inch (5 mm) bit. Install supplied anchors
and secure plate to the wall. Thermostat wire must be 18
AWG wire. Representative thermostat wiring is shown
in Figure 8 however, actual wiring connections should be
determined from the thermostat IOM and or unit wiring
diagram. Practically any heat pump thermostat will work
with Johnson Controls units, provided it has the correct
number of heating and cooling stages.
T H E S M A R T S O L U T I O N F O R E N E R G Y E F F I C I E N C Y
I n s t a l l a t i o n , O p e r a t i o n , M a i n t e n a n c e
R
Comm -
Electrical – Thermostat Wiring
Figure 8: Conventional 3 Heat / 2 Cool Thermostat
Connection to DXM2 Control
Thermostat
Y1
Compressor
Compressor Stage 2
Y2
Auxiliary Heat
W
DH
Dehumidification
O
Reversing Valve
Fan
G
24Vac Hot
R
24Vac Common
C
Fault LED
L
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 S2-7 must be in the auto dehumidification mode for
automatic dehumidification.
B-
B-
A+
JRE - Series
OD
Outdoor
Sensor
(Optional)
GND
R e v . : A u g u s t 1 9 , 2 0 2 0
Remote Indoor
ID
Sensor
(Optional)
DXM2
Board
Y1
Y2
W
H
O
G
R
C
AL1
19
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