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www.welbilt.com 800-225-9916 18
Operational Start-Up
The first 2 – 4 hours of operation after initial start-up is a critical time. Do not just start
the system and leave. Pressure values, compressor and evaporator superheat, and
inspecting for excessive vibrations and loose connections are some of checks that must
be performed prior to leaving the system.
Pre-Start Checks:
Verify that all service valves are fully open.
Ensure that all refrigerant and electrical connections are tight.
Verify that the wiring and piping is properly routed and secured.
The compressor mounting bolts are properly adjusted (see compressor mounts
on page 18).
All fan motors and mounting brackets are tight.
The condensing unit base and evaporator coil are properly secured.
Compressor Mounts:
Hermetic Compressors – hermetic compressor springs are mounted internally; check
the compressor mounting bolts to ensure the nuts have not become loose during
shipment.
Semi-Hermetic Compressors – most semi-hermetic compressors have external spring
mounts and are factory assembled. The following actions are required once the
condensing unit is installed and before system start-up:
Loosen the upper mounting nuts.
Remove the spring steel clips from the mounting springs.
Retighten the upper mounting nuts until the compressor can float on the springs
approximately 1/16” between the mounting nut and rubber grommet.
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