Product data

START-UP – Under Ceiling Systems
WARNING:
Never operate unit without a filter or with grille removed; damage to the unit or personal injury
may result. Make the following checks and complete the Start-Up Checklist before system start-up. Refer to
Installation, Start-Up and Service Instructions for system start-up instructions and refrigerant charging methods.
1. Check condensate drainage system:
a. Remove grille and frame from the unit.
b. On the opposite side of the drain connection, insert a water bottle up into the fan coil unit and fill drain pan.
Water must flow steadily, if not, check the pipe slope or inspect for any pipe restrictions.
2. Make sure that all wiring connections are correct and that they are tight.
3. Check that all barriers, covers, and panels are in place. Ensure that the filters and return-air grilles have been
installed and that the discharge louvers are positioned correctly.
AFTER EXTENDED SHUTDOWN
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 remove any obstructions.
4. Turn on indoor and outdoor unit disconnect switches to supply power to the system 12 hours before starting
the system.
ADJUSTING AIRFLOW
Automatic Air Sweep
All units are equipped with an automatic air sweep feature, which automatically directs the airflow louvers up
and down to provide optimum room air circulation. If the auto. Sweep feature is not desired, temporarily start
the auto. sweep using the remote thermostat (press Air Sweep button). When the louvers are in the desired
position, turn the auto. Sweep off (press Air Sweep button again) to hold them in that position.
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 the system shut down.