19
Start-up and operation
Preliminary checks before
start-up
Before proceeding with a start-up of
individual units, the following steps
should be verified:
High voltage power is correct and in
accordance to nameplate.
Correct unit phase and compressor
revolving direction(scroll compressor
only).
Wire size adequate for protection.
Wiring correct in accordance with
wiring diagram provided.
Check water circuit cleanness,
rightness and completeness. Clean
and flush the unit according to
suggestions listed in installation
manual for water source heat pump.
Vibration isolator, to name a few,
attenuation pad, flexible connections
and etc..
Adequacy of service and supply/
return clearance.
Rightness of temperature valve cap
in high/low pressure pipeline.
Temperature controller in OFF
position.
Water can flow fluently in the water
circuit.
Reliability of condensate drainage.
Rightness of temperature controller
wiring and installation site.
Normal revolution and no friction for
fan.
Accordance of installation and
grounding with national and local
codes. Existence of anti-freeze
additive to close system in case of
heat exchanger frozen.
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Unit start-up procedures
Maximize controller temperature set
value.
S e t s y s t e m a s C O O L , f a n a s
AUTO on temperature controller.
Compressor don’t run.
After compressor, reversing valve,
solenoid valve and circulating pump
energized, decrease temperature
set value. Then regulate flow rate by
revolving the pressure/temperature
bolt as recommended in the water
pressure loss table. As unit running,
water out temperature surpluses
water in temperature by five to
seven degrees, fan operates stably,
current of compressor and fan
varies within nameplate current
range, and no frost forms at the cool
suction of refrigerant circuit.
Set temperature controller power
switch to OFF. Then unit stops
running and reversing valve de-
energized.
Operate the unit for five minutes
until system balance acquired.
Minimize controller temperature set
value.
Set system as HEAT on temperature
controller.
Increase temperature set value till
unit starts running. Then hot gas
will supply, water out temperature of
heat exchanger will decrease three
to five degrees, fan and compressor
operates stably and no frost forms
around the refrigerant circuit.
Change temperature set value as
required.
Instruct customer on operation
procedures.
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Summary of Contents for Axiom GEHB
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