START-UP
Complete the following checks and the Start-Up Check-
list on page CL-1 before system start-up. Refer to outdoor
unit installation, start-up and service instructions for system
start-up procedures and refrigerant charging methods.
1. Check condensate drainage system.
Add water to check the drainage flow. If water does not
flow regularly, check the pipe slope or see if there are
any pipe restrictions.
2. Make sure that all wiring connections are correct and
tight.
3. Make sure that all barriers, covers, and panels are in place.
4. Ensure that the filters have been installed and that the
discharge louvers are correctly positioned.
Never operate unit without a filter. Damage to the
unit or personal injury may result.
5. If the unit is equipped with a crankcase heater, energize
a minimum of 24 hours before starting the unit. To en-
ergize crankcase heater only, close indoor unit discon-
nect, then with the remote controller, set unit in off mode
and close the outdoor unit disconnect.
6. Fully backseat (open) the liquid and vapor tube service
valves.
7. Unit is shipped with valve stems frontseated and caps
factory installed. Replace stem caps after system is opened
to refrigerant flow (backseated). Replace caps finger tight.
8. With the remote controller, turn on the unit and operate
in each mode (as applicable) for 15 minutes to test for
proper operation. Do not operate in cooling mode if out-
door temperature is below 55 F (HDC, HDL, BK) or
0° F (HDS) unless unit is equipped with low ambient
control (HDC, HDL, BK) or winter start kit (HDS). Do
not operate in heating mode (heat pump systems only)
if the outdoor temperature is above 75 F.
9. Test for proper refrigerant charge using the superheat
method (HDC, HDL, BK) or subcooling method (HDS).
10. Explain basic system operation to the owner.
40QN Control System —
The 40QN unit is equipped
with a microprocessor control which operates the system.
This control is located in the control box of the fan coil unit,
with thermistors located in the fan coil inlet and on the
indoor coil. The 40QNH heat pump fan coil units also have
thermistors located on the outdoor coil and in the outdoor air
inlet. These thermistors monitor system operation and con-
trol the operating mode. To change settings or modes of op-
eration, use the factory-supplied infrared wireless remote
controller. This controller allows the fan coil unit to be op-
erated from within the same room without any wire connec-
tions to the unit.
WIRELESS REMOTE CONTROLLERS — A wireless re-
mote controller is supplied for system operation of all high
wall units. Each battery-operated wireless (infrared) remote
controller may be used to control more than one unit. The
wireless remote controller has a maximum range of 20 feet.
The fan coil unit is equipped with an emergency switch which
allows operation if the remote controller malfunctions or is
misplaced. Because the controller uses infrared communi-
cation, all of the following must be true for the controller to
work properly:
1. The power must be on to the fan coil unit.
2. The batteries in the controller must be good.
3. The controller must be within range of and pointed di-
rectly at the fan coil unit.
4. The fan coil unit’s 3-position switch must be set in the
remote position.
The remote controller includes a wall-mounted bracket.
To install the bracket, attach bracket to the wall as shown in
Fig. 17 using, double-sided tape included in remote control-
ler assembly. Install factory-supplied batteries into the re-
mote controller per To Install or Replace Remote Controller
Batteries section on page 18, and place the controller into
the bracket so that it will be ready for use.
Fig. 16 — Mounting Unit to Bracket
Fig. 17 — Mounting Remote Controller Bracket
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