12
Wall Thermostat Terminal
Terminal
Designation
FC(L)
Front desk control terminal L
FC(N)
Front desk control terminal N
LOW-FAN
Low fan speed
HI-FAN
High fan speed
4-WAY
4-way valve; reverse cycle (energized in
heat) for heat pump models
HEAT2
Electrical heater 2
HEAT1
Electrical heater 1
COMP
Compressor
24V(N)
24VAC terminal N (neutral), common
24V(L)
24VAC terminal L
IMPORTANT:
Only trained, qualified personnel should access the electrical panel on the unit and
install electrical accessories. Please contact your local electrical contractor, dealer or distributor
for assistance.
Thermostat Wire Routing
Thermostat wire is not supplied with the PTAC.
Recommended wire gauge is 18- to 20-gauge
solid thermostat wire.
NOTE:
It is recommended that extra wires
are run to unit in case any are damaged during
installation. Thermostat wire should always be
routed around or under, NEVER through, the wall
sleeve. The wire should then be routed behind
the front panel to the terminal connector.
NOTE:
Refer to thermostat installation
instructions for details on installing
wall thermostat.
Remove the two screws
Take the cover panel off
Terminal block
FC(L)
FC(N)
LOW
-F
AN
HI-F
AN
4-W
AY
HEA
T2
HEA
T1
COMP
24V(N)
24V(L)
Dip switch
Remove the two screws
Take the cover panel off
Terminal block
FC(L)
FC(N)
LOW
-F
AN
HI-F
AN
4-W
AY
HEA
T2
HEA
T1
COMP
24V(N)
24V(L)
Dip switch
THERMOSTAT WIRE ROUTING
(UNDER SLEEVE, BEHIND FRONT PANEL)
Proper Wire Routing Beneath Unit
Remove the two screws
Take the cover panel off
Terminal block
FC(L)
FC(N)
LOW
-F
AN
HI-F
AN
4-W
AY
HEA
T2
HEA
T1
COMP
24V(N)
24V(L)
Dip switch
Installation Instruction of
PTAC Wall Thermostat
Remove the two screws as shown and take the
cover panel off.
Terminal block for thermostat connections
•
CAUTION:
UNIT DAMAGE HAZARD.
Failure to follow this caution may result in equipment
damage or improper operation.
•
CAUTION:
UNIT DAMAGE HAZARD.
Improper wiring may damage unit electronics.
Common busing is not permitted. Damage or erratic operation may result.
Fig.3
