78
As R410A refrigerant is adopted for the unit, the following matters will be noted:
• Use special tools of different refrigerants to avoid mixture with different kinds of oil. Especially for instrument
collector and filling hose, never share tools with other refrigerants (R22, R407C, etc.).
• Use anti-backflow adaptor to prevent air, compressor oil from mixing the cooling cycle.
(3) Charge additional refrigerant oil
When total pipe length is more than 510 m, shake the gas pipe after vacuum suction.
Charge additional 1000 cc FV50S refrigerant oil from the joint.
(4) Operating method of operating valve
Opening/closing method
• Remove the valve bonnet and turn the gas pipe side to "on".
• Rotate the liquid pipe side and the balancing oil pipe side with hexagon wrench (JISB4648) until the axle stops.
Since opening the valve violently may damage it, it is necessary to use special tool.
• Fasten the valve bonnet.
Refer to the table below for tightening torque.
Tightening torque N·m
Axle (valve body)
Bonnet (cover)
Cap nut (for check joint)
For gas pipe
Below 7
Below 30
13
For liquid gas
7.85 (MAX 15.7)
29.4 (MAX 39.2)
8.8 (MAX 14.7)
For balancing oil pipe
4.9 (MAX 11.8)
16.2 (MAX 24.5)
8.8 (MAX 14.7)
Refer to 2- (2) on-site pipe construction for tightening torque of tapered nut.
4. Seal in the charged additional refrigerant
Seal in the charged additional refrigerant in liquid state.
Make sure to use gauge for refrigerant sealing-in.
If the refrigerant cannot be completely sealed in when outdoor units are out of service, sealing in on test run
mode will be conducted. (Refer to item for test run method.)
Insufficient refrigerant and long-term running will lead to compressor fault. (Especially when unit running and
refrigerant sealing-in are simultaneous, they must be completed within 30 minutes.)
Determine sealing-in quantity of the additional refrigerant as per the calculation method below and record the
additional quantity of charged refrigerant on the refrigerant quantity recording board on the back of front panel.
The unit is charged only part of the refrigerant at the factory, also need additional refrigerant at the installation
site.
W1: Refrigerant charging volume to outdoor unit at factory.
W2: Refrigerant charging volume to outdoor unit on site.
W3: Refrigerant charging volume to liquid pipe base on different piping length calculation.
W3=actual length of liquid pipe×additional amount per meter liquid pipe=
L1×0.35+L2×0.25+L3×0.17+L4×0.11+L5×0.054+L6×0.022
Summary of Contents for AWAU-YDV1010-H13
Page 1: ...SYJS 03 2017 REV A Edition 2017 03 Service Manual Flow Logic III...
Page 56: ...54 7 Operation range...
Page 102: ...100 Power module driver board 0151800090B and 0151800090...
Page 103: ...101 Filter board MHW505A012...
Page 187: ...Airwell reserves the right to make change without any notice...
