Vacuum Drying - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

SiBE341027
Remove the existing equipment and wiring work
Remove the existing indoor/outdoor units and remote controllers.
Use sheathed vinyl cord or wire (2 wire) with 0.75 to 1.25 mm
wire and the remote controller wire.
Use and sheathed vinyl cord or wire (3 wire) with 0.75 to 1.25 mm
selector.
Use the existing power supply
Check the voltage, the number of phases and breaker capacity of the existing
power supply.
When using the existing power supply, check for the aging of the equipment and
the existence of damages.
Check to confirm that the earth-leakage circuit breaker is capable of handling
high harmonics.
Check the installation of indoor unit, outdoor unit and remote controller and so on. Check
the working of transmission wiring, power wiring, ground-wiring and wrong wiring.
Air tight test of existing piping
Fill nitrogen gas and check for deterioration or leakage in the existing piping.
Leave the piping in 3.3MPa for 24 hours and confirm that there is no pressure drop.

Vacuum drying

If the pipe diameter and piping length are known, calculate the insufficient amount
of refrigerant and additionally charge in the liquid pipe. Write down the amount of
additional refrigerant charging.
Test operation on installation (automatic contamination recovery and automatic refrigerant charge)
(Additional refrigerant charge is required. Refer to the installation manual in detail.)
Adjust the test operation ⇒ Delivery
General Information
(Continued for the previous page)
for the transmission
2
for the cool/heat
2
No New wiring work is
needed.
No
New power supply is
needed.
If the check operation is not
completed normaly, error code
"U3" is displayed and normal
operation is not possible.
Features
13