Air-to-water Heat Pump
26
The following procedure should be executed by experience and qualified maintenance men.
No.
Start up the pretest procedure
3
Check whether the phase sequence of the main power supply is correct. If not, correct the phase sequence
firstly.
Recheck the phase sequence before start-up to avoid reverse rotation of the compressor which may damage the unit.
4
Apply the universal electric meter to measure the insulation resistance between each outdoor phase and earth
as well as between phases.
Caution:
defective earthing may cause electric shock.
No.
Ready to start
1
Cut off all temporary power supply, resume all the insurance and check the electricity for the last time.
Check the power supply and voltage of the control circuit;
V must be ±10% within the range of rated
operating power.
No.
Start up the unit
1
Check all the conditions needed to start up the unit: oil temperature, mode, required load etc.
2
Start up the unit, and observe the operation of compressor, electric expanding valve, fan motor and water pump
etc.
Note: the unit will be damaged under abnormal running state. Do not operate the unit in states of high pressure
and high current.
Others:
Items for acceptance
after debugging
Estimation or suggestion on the general running situation: good, modify
Identify the potential problem (nothing means the installation and debugging are in accordance with
the requirements.)
a. problem of power supply and electric control system:
b. problem of load calculation:
c. outdoor refrigerant system:
d. noise problem:
e. problem of indoor and piping system:
h. other problems:
During operation, it is needed to charge for the maintenance due to non-quality problems such as
incorrect installation and maintenance.
Acceptance
Is the user trained as required? Please sign. Yes( ) No( )
13 Daily Operation and Maintenance
In order to avoid damage of the unit, all protecting devices in the unit had been set before delivery,
so please do not adjust or remove them.
For the first startup of the unit or next startup of unit after long-period stop (above 1 day) by cutting
off the power, please electrify the unit in advance to preheat the unit for more than 8 hours.
Never put sundries on the unit and accessories. Keep dry, clean and ventilated around the unit.
Remove the dust accumulated on the condenser fin timely to ensure performance of the unit and to
avoid stop of the unit for protection.
In order to avoid protection or damage of the unit caused by blockage of the water system, clean the
filter in water system periodically and frequently check water replenishing device.
In order to ensure anti-freezing protection, never cut off the power if ambient temperature is below
zero in winter.
In order to avoid frost crack of the unit, water in the unit and pipeline system not used for a long
period should be drained. In addition, open the end cap of the water tank for drainage.
