SINGLE SCREW CHILLERS IMM
Engineered for Flexibility and Performance
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B) Power on more than 8 hours before operation.
In order to start compressor smoothly, starter cabinet should be powered on more than 8 hours
to energize oil heater to heat the oil.
7.4 Water system check
A) Water should be filled in pump.
Open water pump to fill water in system, meanwhile discharge all air of the water system by
slowly opening vent valve on the top of evaporator and condenser and closing it when water
overflowing. Air mixed in system will reduce performance.
B) Water side pressure should be specified value as shown below
Please ensure water side pressure of evaporator/condenser water. Except for water pressure
above, hydraulic pressure during pump start-up also needs to be confirmed, if it exceeds the
max allowed water pressure, chiller may be damaged;
Please observe the requirements of maximum pressure stood by water side stated in the chiller
contract.
C) Leakage check
Ensure no leakage at flange, bushing and connector.
D) Ensure no air mixed
When water has noise, water pressure changes during equipment installation, or amps of pump
is not steady etc., it’s possible that air is mixed in water system, in this case, please discharge
air again.
Mixed air not only reduces chiller performance, but also may cause evaporator/condenser tube
damage due to increasing water corrosion.
E) Check if flow adjustment is finished
Adjust to proper flow as per flow meter or pump characteristic chart.
For condenser, too small flow will reduce chiller performance, meanwhile impurity in tube and
fouling will cause corrosion damage, and too big flow will cause corrosion.
For evaporator, too small flow will reduce chiller performance; and too big flow will cause
scouring and Carmen whirlpool effect to exacerbate friction between tubes and clapboard, even
lead to leakage.
7.5 Check chiller
Chiller is designed with valve due to operation and service, please confirm every valve's status
before start-up.
The status of every valve is shown as below:
