Unit Start-Up; Checklist; Initial Start-Up - Omega VSHP SERIES Installation And Operation Manual

OMEGA | WATER SOURCE HEAT PUMPS
strainers or mechanical filtration system has been in-
stalled and commissioned. The chassis should be at
o
room temperature (68 F) prior to start up.
Once the installation of the cabinet and chassis units is
complete the riser shut-off valves can be opened. The
riser loop system should be filled and all trapped air
should be bled from the system prior to unit start-up.
Water flow failure will cause the unit to trip on the safety
devices. Repeated water flow failures can cause equip-
ment damage.

CHECKLIST

Before energizing the unit ensure all steps are verified in
the following checklist:
___High voltage power supply is correct and in accord-
ance with unit nameplate ratings.
___Unit is electrically grounded and circuit protection is
the correct size.
___Low voltage control wiring is correct as per unit wir-
ing diagram.
___Riser loop system is clean, filled, and vented of any
air.
___Chassis unit high and low pressure caps are firmly
secure and in place.
___Chassis matches the cabinet model number.
___Protective cardboard air coil cover is removed and
unit service cover panel and filter are in place.
___There is a proper seal between chassis service cov-
er panel and unit cabinet.
___Riser shut-off valves are in the OPEN position.
___Riser loop system has been vented for any air intro-
duced during chassis installation.
___Riser loop water is circulating through all units and at
design conditions.
___Unit condensate drain hose is securely attached to
drain pan and condensate riser.
___Indoor unit blower spins freely.
___All ductwork is complete.
___Clean filters are installed.
___All cutting, sanding, drywalling, patching work is
complete.
___Unit blower spins freely.
___Thermostat is in the OFF position.
9
INITIAL UNIT START-UP
1. Close disconnect switch.
2. Set thermostat to a high setting (above current room
temperature), set system to COOL with fan on AU-
TO. The compressor should not run.
3. Lower the thermostat temperature setting until the
fan and compressor energize. Verify the following
results:
Leaving water temperature (LWT) in the heat ex-
•
changer water coil is warmer than the entering wa-
ter temperature (EWT) by approximately 9
Blower is running smoothly.
•
Compressor and blower amps are within nameplate
•
data.
Suction line is cool and no frosting is forming in the
•
refrigeration circuit.
4. Set thermostat to the OFF position. Unit compressor
and fan should stop running.
5. Allow the system to equalize for approximately 5
minutes.
6. Set thermostat to the lowest setting and switch to
the HEAT position.
7. Adjust thermostat temperature higher until the fan
and compressor energize. The following should
occur:
Warm air will flow from the supply register.
•
Leaving water temperature (LWT) in the heat ex-
•
changer water coil is cooler than the entering water
temperature (EWT) by approximately 5
Blower and compressor operation is smooth and no
•
frost development is visible in the refrigeration cir-
cuit.
8. Set the thermostat to the desired temperature.
9. Check for any water leaks at the hose connections.
o o
F—12 F.
o o
F—9 F.
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