Airwell YEVFD Series, Service Manual

Page: 42 / 92

Because the unit is with refrigerant R410A, the below issues should be paid attention:
■ To prevent the different oil into the pipe, please use the special tool for R410A, especially for gauge manifold and
charging hose.
■ To prevent the compressor oil into the refrigerant cycle, please use the anti-counter-flow adapter.
■ Take down the valve cap, gas pipe turns to
"open" state as right figure.
■ Turn the liquid pipe with hexangular spanner
until it stops. If opening the valve strongly, the
valve will be damaged.
■ Tighten the valve cap.
D. Check valve operation
E. Additional refrigerant and oil charging
Open/close method:
Tighten torque as the table below:
Tighten torque N·m
Shaft (valve body) Cap (cover) T-shape nut (check joint)
For gas pipe 8~9 22~27 8~10
For liquid pipe 5~6 13~16 8~10
Charge the additional refrigerant as liquid state with the gauge.
If the additional refrigerant can not be charged totally when the outdoor stops, charge it at the
trial mode.
If the unit runs for a long period in the state of lack of refrigerant, compressor will occur failure.
( the charging must be finished within 30 minutes especially when the unit is running, meanwhile
charging the refrigerant).
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
Open
Close
Refrigerant record form
Model
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
Total
refrigerant
volume
charging on
site during
installation
W: Total
refrigerant
volume
charging
on site for
maintenance
Liquid pipe
diameter
(mm)
Additional refrigerant
amount
(kg)
Refer to
label
0kg Ø6.35 0.022kg/m×__m=__kg
W2+W3=
___kg
W1+W2+
W3=___kg
0kg Ø9.52 0.054kg/m×__m=__kg
0kg Ø12.7 0.11kg/m×__m=__kg
Ø15.88 0.17kg/m×__m=__kg
Ø19.05 0.25kg/m×__m=__kg
Ø22.22 0.35kg/m×__m=__kg
W3=___kg
AW-YEVFD220-H16
AW-YEVFD280-H16
AW-YEVFD335-H16
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