PTAC Owners and Installation Manual

11
(Optional)WALL THERMOSTAT TERMINAL
!
CAUTION
Failure to follow this caution may result in
equipment damage or improper operation.
Improper wiring may damage unit electronics.
Common busing is not permitted. Damage or
erratic operation may result.
UNIT DAMAGE HAZARD
FRONT DESK CONTROL
The controller can handle a switch signal from FC(L)
and FC(N) input, called front desk control. Input
must be 24VAC. If system doesn't receive a 24VAC
signal, it will turn unit off; otherwise, the unit runs in
normal control.
- The DIP switch can control the FRONT DESK
CONTROL feature. The DIP switch is on the DOWN
position, the unit will be turn off; otherwise,the unit
runs in normal control. See FigB.
FigB.
Dip switch of FRONT
DESK CONTROL
NOTE:
Use terminal 4-way for heat pump connection
only.
Suggest set the compressor protection time
morn than 3 minutes in . If set less
than 3 minutes, the compressor will restart delay
3 minutes still.
must be heating changeover
4-way valve.
For thermostats that have only one fan speed
output (on or auto),the fan speed is determined
by how the terminal connector is wired. If Low
fan is desired, wire the G output from the
thermostat to (LOW-FAN) on the units terminal
block. If High fan is desired, wire the G output
from the themostat to (HI-FAN) on the units
terminal block.
The range of set tempreture of
must be in consonance with the range of DIP
switch setting.
must be set the type properly
in consonance with the unit type : heat pump
or no heat pump.
If the has only one electrical
heater output, connect the two terminals of
HEAT 1 and HEAT 2, the unit can operate two
electrical heaters(only for the unit has two
electrical heaters). Otherwise operate one
electrical heater.
Please do not remove the control panel.
wall thermostat
Wall thermostat
Wall thermostat
Wall thermostat
Wall thermostat
LOW-FAN
HI-FAN
4-WAY
HEAT1
COMP
24V(N)
24V(L)
Terminal of PTAC other Wall Thermostat(MODE B)