78 WSHP-SVX01L-EN
Pre-Start Checklist
Before energizing the unit, the following system devices
must be checked:
• Is the high voltage power supply correct and in
accordance with the nameplate ratings?
• Is phasing of the unit correct per compressor rotation
(scroll compressor only)?
• Is the field wiring and circuit protection the correct
size?
• Is the low voltage control circuit wiring correct per the
unit wiring diagram?
• Is the piping system clean/complete and correct? (A
recommendation of all system flushing of debris from
the water-to-refrigerant heat exchanger, along with air
purging from the water-to-refrigerant heat exchanger
be done in accordance with the Closed-Loop/Ground
Source Heat Pump Systems Installation Guide).
• Is vibration isolation provided? (i.e. unit isolation pad,
hose kits)
• Is unit serviceable? (See clearance specifications in
“Unit Dimensions and Weights,” p. 11).
• Are the low/high-side pressure temperature caps
secure and in place?
• Are all the unit access panels secure and in place?
• Is the thermostat in the OFF position?
• Is the water flow established and circulating through
all the units?
• Is the duct work correctly sized, run, taped, insulated
and weather proofed with proper unit arrangement?
• Is the condensate line properly sized, run, trapped,
pitched and primed?
• Is the zone sensor correctly wired and in a good
location?
• Does the indoor blower turn freely without rubbing?
• Has all work been done in accordance with applicable
local and national codes?
Has heat transfer fluid been added in the proper mix to
prevent freezing in closed system application?
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