Product data

START-UP – 38HDC, 38HDL, & 38QR
NOTE:
All outdoor units with a reciprocating compressor have a crankcase heater. Heater should be
energized for a minimum of 12 hours prior to unit start-up.
LEAK TEST
Field piping and all tubing connections must be leak tested by the pressure method. Use R-22 at approximately
25 psig backed up with an inert gas to reach a total system pressure not to exceed 245 psig.
EVACUATE AND DEHYDRATE
Field piping and fan coil must be evacuated and dehydrated to 1000 microns.
WARNING:
Service valves must be fully back seated to close service port. There is no Schrader valve at the
service port, and failure to backseat the valve could result in loss of system charge or personal injury.
CHARGE SYSTEM
Release charge into system by opening (back seating) vapor supply and vapor return line service valves.
PRELIMINARY CHECKS
Complete Start-Up Checklist and the following checks prior to starting up unit.
1. Check condensate drainage system. To do this, add a small amount of water into the fan coil units condensate
pan, and ensure that the pan drains freely. Inspect pan and lines, and clean as required.
2. Make sure that all wiring connections are correct and tight.
3. Check all barriers, covers, and panels to ensure they are in place.
4. Unit is shipped with the valve stems front seated and caps factory installed. Remove caps from all valves to
which a fan coil unit has been connected. Replace caps and tighten until finger tight.
5. Fully backseat (open) the vapor and liquid tube service valves.
6. Turn on main disconnects to indoor fan coil and outdoor units.
7. Turn on the fan coil unit and operate it in each mode (i.e., electric heat [if provided] and fan cooling) for 15
minutes to test for proper operation. Use the fan coil remote controller if unit is so equipped.
8. Test for proper refrigerant charge using the subcooling method.
TO START UNIT
NOTE:
When using outdoor unit in conjunction with 40QA, 40QN or 40QK fan coil, refer to start-up
instructions included with fan coil for correct start-up procedures. Be sure that crankcase heater (if so equipped)
has been on for 12 hours and that field disconnect is closed. Set room thermostat below ambient temperature.
Operate unit for 15 minutes, and then check system refrigerant charge. See Charge Verification Section #19.
Unit compressor starts after a 5-minute delay if equipped with accessory Time Guard® II device.