Daikin RXYQ96PYDN Service Manual page 235

Test Operation
10.2.1 Check Work Prior to Turn Power Supply On
Check the below items.
2Power wiring
2Control transmission wiring
between units
2Ground wire
Check on refrigerant piping /
insulation materials
Check airtight test and vacuum
drying.
220
Is the wiring performed as specified?
Is the designated wire used?
Is the wiring screw of wiring not loose?
Is the grounding work completed?
Is the insulation of the main power supply circuit deteriorated?
Use a 500V megger tester to measure the insulation. (*1)
2 Do not use a megger tester for 200-240 circuits.
*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 mixed in the
compressor, thus decreasing the
insulation resistance.
Heat the compressor as shown on
the right and then recheck the
insulation.
Is the pipe size correct?
Are the design pressures for the liquid pipe, suction pipe, dual
pressure gas pipe, and pressure equalizer pipe (in case of multi
units) all not less than 580psi?
Is the pipe insulation material installed securely?
Liquid, suction, and high & low pressure gas pipes need to be
insulated. (Otherwise causes water leak.)
Have the airtight test and the vacuum drying been conducted
according to the procedure in the Installation Manual?
SiUS34-801A_b
Terminal
Dryer
(3500 BTU/h)
VRVIII R-410A Heat Recovery 60Hz