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
Consoles
R e v. : 0 8 / 2 4 / 1 5
23
c l i m a t e m a s t e r. c o m
Wire Size
Maximum Wire Length*
18-Gauge
75 feet [22m]
16-Gauge
125 feet [38m]
14-Gauge
200 feet [60 m]
Figure 7a: Wiring for multiple units to be controlled
from 1 thermostat
Thermostat Installation -
The thermostat should be
located on an interior wall in a larger room, away from
supply air 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 7 to
the low voltage terminal strip on the CXM or DXM control
board. Practically any heat pump thermostat will work with
ClimateMaster units, provided it has the correct number of
heating and cooling stages.
Zone integrity must be maintained to effi ciently control
units or groups of units. Unless zones of control are
considered and accounted for, adjacent units may operate
in heating and cooling modes simultaneously, to prevent
units with DXM can be wired per fi gure 7A.
*Length = Physical distance from thermostat to unit.
Table 6: Recommended Thermostat Wire Sizes
Figure 7: Typical Remote Thermostat Wiring
Thermostat
Connection to CXM Control
Compressor
Reversing Valve
Fan
24Vac Hot
24Vac Common
Fault LED
Y
O
G
R
C
L
Y
O
G
R
C
AL1
CXM
Optional Wall-Mounted Thermostat
TRC WSHP units (Model digit 8 is C, D, F, or K) are built
with standard internal thermostat that has automatic
changeover (ACO) confi guration. No external, fi eld-
installed low-voltage wiring is required.
When desired, the unit can be furnished with a 24-volt
control circuit which is fi eld-wired to a ClimateMaster-
supplied accessory remote thermostat.
Low-voltage wiring between the unit and the wall
thermostat must comply with all applicable electrical codes
(i.e., NEC and local codes), and be completed before the
unit is installed.
Note: If ATA11U03 is used must jumper G and G2
CS
DXM
Unit
1
Connect thermostat to Unit 1 then
jumper Com 1 (S to S and C to C)
up to 6 units with twisted pair.
DXM
Unit
2-6
Thermostat
CS