Product data

START-UP – High Wall Systems
Complete the following checks and the Start-Up checklist 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.
WARNING: 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
energize crankcase heater only, close indoor unit disconnect, 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 front seated and caps factory installed. Replace stem caps after system is opened
to refrigerant flow (back seated). 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 outdoor temperature is below 55 F or 0° F unless unit is
equipped with low ambient control. 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 or subcooling method.
10. Explain basic system operation to the owner.
AFTER EXTENDED SHUTDOWNS
If the system has been turned off for more than 12 hours, turn on the indoor and outdoor units disconnect switches
to supply power to the system for 12 hours BEFORE starting the system.
SEASONAL CHANGEOVERS
When changing heat pump system from cooling to heating or heating to cooling, or before starting cooling only
system after it has been out of use for the winter season, perform the following steps BEFORE starting the system:
1. Inspect and clean the outdoor unit, particularly the coil.
2. Clean or replace the air filters in the indoor unit.
3. Clean the indoor units drain pan and drainpipe, and re-move any obstructions.
4. Turn on indoor and outdoor unit disconnect switches to supply power to the system 12 hours before starting the
system.
TO TURN THE UNIT ON AND OFF
To turn the unit on, press the ON/OFF button on the Remote Control. Unit will start. To stop unit operation, press
the ON/OFF button again. Unit will stop. Refer to Owner’s Manual enclosed with the fan coil unit or Controls
Section #20 for full remote control operating details.
ADJUSTING AIRFLOW
The airflow direction may be adjusted up and down using the remote controller, and from side to side by manually
moving the vents. For cooling only units and heat pump units when in the cooling mode, set the louvers to
discharge straight out parallel to the floor. For the heat pump units operating in heating mode, it is recommended
that the air discharge louvers be set to discharge vertically.
NOTE: The full swing range of the mode selected will automatically be used if auto. fan mode is selected.
OPERATING MODE MEMORY
After the system is turned off or after a power failure, the system remains in the last operating mode selected. When
the system is turned back on, or when power is automatically restored, operation continues in the same operating
mode as when power shut down.