259
COMMISSIONING
ENGLISH
To assure best performance of
, it is required to perform periodical check and
maintenance. It is recommended to proceed following check list for once a year.
CAUTION
Turn off the power before proceeding maintenance
!
Starting Operation
Check before Starting Operation
1
Check to see whether there is any refrigerant leakage, and check whether the power or
transmission cable is connected properly.
2
Confirm that 500 V megger shows 2.0 M
Ω
or more between power supply terminal block and
ground. Do not operate in the case of 2.0 M
Ω
or less.
NOTE:
Never carry out mega ohm check over terminal control board.
Otherwise the control board may break.
Immediately after mounting the unit or after leaving it turned off for an extended length of time, the
resistance of the insulation between the power supply terminal board and the ground may decrease
to approx. 2.0 M
Ω
as a result of refrigerant accumulation in the internal compressor.
If the insulation resistance is less than 2.0 M
Ω
, turn on the main power supply.
3
When the power is applied for the first time, operate the product after preheating for
2 hours. To protect the unit by increasing the oil temperature of the compressor.
No
Category
Item
Check Point
1
Water
Water pressure
• In normal state, the pressure gauge (in front of the unit) should
indicate 2.0~2.5 bar.
• If the pressure is less than 0.3 bar, please recharge the water.
2
Strainer
(Water filter)
• Close the shut-off valves and disassemble strainer. Then wash the
strainer to make it clean.
• While disassembling the strainer, be careful for water flood out.
3
Safety valve
• Open the switch of the safety valve and check if water is flood out
through the drain hose.
• After checking, close the safety valve.
4
Electricity
Terminal block
wiring
• Look and inspect if there is loosen or defected connection on the
terminal block.
