Product data

START-UP - Multi-Split
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 1,000 microns using accepted practices.
WARNING:
Service valves must be fully back seated to close service port. There is no Schrader valve at the
service port, and failure to back seat 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. Open
ONLY those service valve sets, which have fan coil unit sections connected to them. DO NOT open valves
where no field tubing has been connected.
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 each fan coil unit condensate
pan, and ensure that each pan drains freely. Inspect drain pans 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. Identify which fan coil unit valve sets have been connected.
IMPORTANT:
DO NOT open valves that do not have fan coil units connected to them.
5. Unit is shipped with the valve stems front seated and caps factory installed. Remove caps from all valves to
which fan coil units have been connected. Replace caps and tighten until finger tight.
6. Fully back seat (open) the vapor supply and vapor return tube service valves.
7. Turn on main disconnects to indoor fan coil units and outdoor condensing unit.
8. Using the controller for each indoor fan coil unit, turn on each fan coil unit and operate each unit in
each mode (i.e., electric heat [if provided], and fan cooling) for 15 minutes to test for proper operation.
9. Test for proper refrigerant charge in each circuit using the subcooling method.