Final Inspection & Start-up
(continued)
NOTICE
Room temperature must be below 85°F(29°C) to energize the
heater on PTHP's with unit-mounted controllers.
5 kW heat models only
— in the event the limit switch opens and de-
energizes the electric heat, the limit switch will need to be manually reset.
To reset switch:
Turn power off
•
Remove the control box cover.
•
Locate the limit switch.
•
Push in the reset button on the face of the switch (see
•
Figure 38).
Auxiliary heating operation — heat pump units —
outdoor temperature below 40°F (4°C) — hydronic
option
Place
1.
the thermostat or system switch in the
HEAT
position.
Adjust the thermostat to a warmer temperature.
2.
The following should then occur:
A signal from the processor board will activate the water or
•
steam valve.
The motorized valve should open and allow hot water or steam
•
to run through the coil.
The indoor fans will run, blowing air through the hydronic coil
•
If the unit is equipped with an Aquastat, the indoor fan and the
˚
motorized damper operation will be delayed until the hydronic
coil reaches 100 ± 5°F (38 ± 3°C).
The signal to the water or steam valve will continue until the room
•
temperature rises above the setpoint by 3°F (2°C).
After the unit starts running and the space gets warmer, the
•
hydronic valve will close and indoor fan will switch off after the
sixty-second purge time has elapsed.
After the unit starts running and the space gets warmer,
3.
adjust the
thermostat to a cooler temperature setting, the hydronic valve will
close and indoor fan will switch off after the sixty-second purge
time has elapsed.
If a warmer room temperature is desired,
4.
adjust the thermostat to
a warmer temperature setting, which will open the hydronic valve
and turn on the indoor fan.
If a cooler room temperature is desired, adjust the thermostat to
5.
a cooler temperature setting. The hydronic valve will again close
and indoor fan will switch off after the sixty-second purge time
has elapsed.
Place the thermostat or system switch in the
6.
OFF
position.
All operation should stop.
NOTICE
Room temperature must be below 85°F (29°C) for the hydronic
heater to operate on PTHP's with unit-mounted controllers.
The hydronic valve is a 24Vac normally open valve. Should power
be lost to the unit, the valve will default to the open position.
Completion of testing for heat pumps
Operation testing is now complete. If the
TEST
jumper was set to
test mode
then make sure to set it back to
normal operation
(see Figure 35, page 27).
Replacement Packaged Terminal Air-Conditioning / Heat Pump
• Installation, Operation, and Maintenance Manual •
P/N 240008034, Rev. D [7/29/2011]
31
Made in USA
