Daikin RXYQ96PYDN Service Manual page 241

Test Operation
10.2.5 Checking of Device and Installation Conditions
Be sure to check the following:
For those doing electrical work
1. Make sure there is no faulty transmission wiring or loosening of a nut.
2. Make sure there is no faulty power wiring or loosening of a nut.
3. Has the insulation of the main power circuit deteriorated?
For those doing pipe work
1. Make sure piping size is correct.
2. Make sure insulation work is done.
3. Make sure there is no faulty refrigerant piping.
10.2.6 Additional Refrigerant Charge and Check Operation
The outside unit is charged with refrigerant when shipped from the factory, but depending on the
size and length of the piping when installed, it may require additional charging.
For charging the additional refrigerant, follow the procedure in this chapter and
then carry out the check operation.
10.2.6.1
Before working
[About the refrigerant tank]
Check whether the tank has a siphon pipe before charging and place the tank so that the
refrigerant is charged in liquid form.
(See the figure below.)
With siphon pipe
Other tanks
NOTE:
[Shutoff valve operation procedure]
When operating the shutoff valve, use the following procedures:
226
Measure the insulation and check to ensure that the insulation is above the regular value in
accordance with relevant local and national regulations.
See 10.2.4 Pipe Insulation.
Stand the tank upright and charge.
(The siphon pipe goes all the way inside,
so the tank does not need to be put
upside-down to charge in liquid form.)
Stand the tank upside-down and charge.
Always use the proper refrigerant (R-410A). If charged with refrigerant containing an improper
material, it may cause an explosion or accident.
R-410A is a mixed refrigerant, so charging it as a gas will cause the refrigerant composition to
change, which may prevent normal operation.
SiUS34-801A_b
VRVIII R-410A Heat Recovery 60Hz