Specifications

IM 938-4 / Page 31 of 42
Standard (Non-Programmable)
Digital Control Board – Jumper
Placement
1– Jumper Placement to Select System Module (See
Jumper Detail)
A– Place jumper across AC/E to select Air Conditioner
with Electric Heat.
B– Place jumper across HP to select Heat Pump
C– Place jumper across HP/E to select Heat Pump with
Electric Back-up Heat.
2– Jumper Placement to Select Fan Control
A– When in Fan Cycle Mode, fan operates for 2 minutes.
Place jumper across 10, 20, 30, or 1 HR to select fan
cycle off minutes which will be overridden by the room
temperature.
3– Jumper Placement to Select
Controller Type:
A
– Place jumper across LUI to select unit mounted touchpad
(Local User Interface).
B– Place jumper across T’STAT to select remote, wall
mounted programmable, or non- programmable
thermostat.
3
2
1
Jumper Placement Detail
C
A
B
A
B
A
Wiring Diagram Legend
CT = Control Transformer
CM
= Compressor Motor
IFM
= Indoor Fan Motor
OFM
= Outdoor Fan Motor
OCS
= Outdoor Coil Sensor
OAS
= Outdoor Air
Sensor
ICS = Indoor Coil Sensor
IAS
= Indoor Air
Sensor
LUI = Local User Interface
REV
= Reversing V
alve
EHC = Electric Heat Contactor