24
Installation procedure
Because the unit is with refrigerant R410A, the below issues should be paid attention:
•
To prevent the oil going into the pipe, please use the special tool for R410A, especially for
gauge manifold and charging hose.
• To prevent the oil going into the refrigerant cycle, please use the anti-counter-flow adapter.
•
When maintaining the outdoor, release refrigerant from check valve. When taking vacuum
evacuation, set the relative dip switch. The details refer to Page38.
•
Take down the valve cap, suction gas pipe, HP
gas pipe turns to "open"
•
Turn the liquid pipe and the oil equalization pipe
with hexangular spanner until it stops. If opening
the valve strongly, the valve will be damaged.
•
Tighten the valve cap.
E. Additional refrigerant charging
D.
Check valve operation
Open/ close method: (The suction gas pipe stop valve for
AV08IMVUSA,
YCV280HR
,
YCV335HR
,
YCV400HR
,
YCV450HR
)
"open"state
"close"state
Tighten torque as the table below:
Tighten torque N·m
Shaft (valve body)
Cap (cover)
T-shape nut (check joint)
For suction gas pipe and
HP gas pipe
Less than 7
Less than 30
13
For liquid pipe
7.85 (MAX15.7)
29.4 (MAX39.2)
8.8 (MAX14.7)
For oil equalization pipe
4.9 (MAX11.8)
16.2 (MAX24.5)
8.8 (MAX14.7)
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
