Remote Mounted Thermostat - McQuay Remington PTAC Series Installation & Maintenance Data

Units that are using remote mounted thermostats should be
field wired as shown in Figure 16. The Remote Wall Thermo-
stat internal wiring shown is typical for manual changeover.
Other thermostats will have different internal wiring. Other
considerations for this arrangement are as follows.
1. When wiring the low voltage plug and wire assembly, pro-
vide enough wire to move harness out of the way for
chassis removal. Also see pages 5 and 8.
Figure 16. Typical Remote Thermostat Wiring
! DANGER
Disconnect all electrical power before servicing
unit to prevent injury or death due to electrical
shock.
Installing Remote Mounted Thermostat
Remote
Thermostat
System
Switch
To Sleeve
RD YE GN WH
Use copper conductors only. Unit terminals are not
designed to accept other types of conductors.
Failure to do so may cause damage to the
equipment.
2. If a subbase is used under the unit wall sleeve, a small
hole may be drilled and grommeted in the subbase front to
allow passage of the low voltage wires.
3. When using a programmable or electronic wall thermostat
that requires 24V power, include the BK (common) wire to
the thermostat. HP wall stats with 2 stage heat and mul-
tiple fan speed controls, require that all 7 low voltage wires
to be connected. The stat must be programmed to power
both WH and BR wires simultaneously to bring on 2nd stage
heat (electric) and turn off reverse cycle heating.
Temperature
Fall
Heat
Off
On
Fan
Cool
Auto
Switch
R1
W1 Y1 G1
W G
Y R
High FAN
Common
BK BL BR
Plug and Wire Assembly
7 Pin Receptacle Mounted on
Front of Control Box
! CAUTION
2nd Stage
Heat
! WARNING
Hazardous Voltage!
Disconnect all electric power including remote
disconnects before servicing. Failure to disconnect power
before servicing can cause severe personal injury
or death.
IM 812 / Page 17 of 24