Test Operation; Procedure And Outline - Daikin VRV-WIII RWEYQ72PTJU Service Manual

Test Operation

1. Test Operation

1.1

Procedure and Outline

Follow the following procedure to conduct the initial test operation after installation.
1.1.1 Check Work Prior to Turn Power Supply ON
Check the below items.
• Power wiring
• Control transmission wiring
between units
• Operation signal to heat
source pump and interlock
wiring from pump
• Interlock circuit
• Ground wire
Check on refrigerant piping, water
piping and piping insulation
Check on air tight test and
vacuum drying
Check on amount of additional
refrigerant charge
Check on stop valves opening
84
Is the wiring performed as specified?
Are the designated wires used?
Are the setscrews of wiring not loose?
Is the grounding work completed?
Is the insulation of main power supply circuit deteriorated?
Use a 500V megger tester to measure the insulation. (*1)
• Do not use a megger tester for other circuits than 200V (or
240V) circuit.
*1: Measure to be taken against decreased insulation resistance in
the compressor
If the compressor is left to stand for
an extended period of time after the
refrigerant charge with the stop
valve open and the power supply
OFF, the refrigerant may be melted
in the compressor, thus decreasing
the insulation resistance.
Heat the compressor as shown on
the right and then recheck the
insulation.
Is pipe size proper? (The design pressure of this product is
580 psi.)
Are pipe insulation materials installed securely?
Liquid and gas pipes need to be insulated. (Otherwise causes
water leak.)
Is refrigerant piping carried out correctly as per installation
manual?
(Special care is required for multi condensing unit installation.)
Is the air tight test and vacuum drying carried out as per
installation manual?
Is refrigerant charged up to the specified amount?
If insufficient, charge the refrigerant from the service port of stop
valve on the liquid side with condensing unit in stop mode after
turning power ON.
If the specified amount of refrigerant can not be charged in stop
mode, charge the required refrigerant as per "Additional
refrigerant charge total flow" in operation. (Refer to P.123)
Has the amount of refrigerant charge been recorded on "Record
Chart of Additional Refrigerant Charge Amount"?
Check to be sure the stop valves are under the following conditions.
Cooling and heating
switching operation
Cooling and heating
simultaneous operation
Discharge gas side Suction side Discharge liquid side
Open
Close
Open Open
SiUS30-1301
Terminal
Dryer
(1000W)
13/64in.
Heat the left side of the
terminal for a period of
approximately 15 minutes.
Open
Open
Field Setting