15
Tranquility
®
Digital Air Handler (TAH)
R e v. : A u g u s t 2 1 , 2 0 1 8
c l i m a t e m a s t e r. c o m
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 Figures 9 and 10 to the low voltage terminal strip on the
ECM control board. Practically any heat pump thermostat
will work with these units, provided it has the correct number
of heating and cooling stages.
Thermostat Connections
C
24V Common for Control Circuit
R
24V Supply for Control Circuit
A+
Communications (Positive)
B –
Communications (Negative)
iGate
™
Thermostat
ATC3203
DXM2 in
Compressor
Section
Communicating
TAH with
AXM Control
R
A+
A+
B-
B-
C
R
C
24V
A+
B-
C
24V
A+
B-
C
Figure 9: 4-Wire Connection to ATC communicating
thermostat, AXM Communicating control
and Tranquility
®
Digital Splits
Figure 10:
Connection to Non-Communicating
thermostat and AXM communicating control
in
Tranquility
®
Digital Air Handler
Figure 11:
Connection to Non-Communicating
thermostat, AXM control and
Tranquility
®
TTS
Non-Communicating Split
Non-Communicating
2 Cool / 3 Heat Thermostat
Compressor
Compressor Stage 2
Communicating
TAH AXM Control
Y1
Y2
O
R
G
C
DH
AL1
Y1
Y2
Non-communicating thermostat with communicating
compressor section and communicating air handler
DXM2 In
Compressor
Section
Fault LED
L
Reversing Valve
O
W
Auxiliary Heat
W
24Vac Hot
R
Fan
G
24Vac Common
C
DH
Dehumidification
(ATP32U04 Only)
C
A+
B-
24V
C
A+
B-
24V
Non-Communicating
2 Cool / 3 Heat Thermostat
Compressor
Compressor Stage 2
Communicating
TAH AXM Control
Y1
Y2
O
R
G
C
DH
AL1
Y1
Y2
Non-communicating thermostat with communicating
compressor section and communicating air handler
DXM2 In
Compressor
Section
Fault LED
L
Reversing Valve
O
W
Auxiliary Heat
W
24Vac Hot
R
Fan
G
24Vac Common
C
DH
Dehumidification
(ATP32U04 Only)
C
A+
B-
C
A+
B-
24V
24V
ATC32U02
24
V
B
-
A
+
C
IMPORTANT:
Violet jumper from FP to FP on Terminal
block 2 in compressor section must be removed when
unit is installed with TAH air handler or when FP2
sensor is field installed on existing air handler.
See equipment wiring diagram for more details.
When a non-communicating thermostat will be used to
control the system a ClimateMaster ATC32U02 thermostat
must be connected so that proper system communications
and operation are maintained. The ATC32U02 may be
installed at an inconspicuous location near the air handler
and wired to the TB1 terminal strip of the AXM control board.
The ATC32U02 should be set to the OFF mode.
