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NOTE:
•
When the refrigerant is recovered or charged because
of repairing, operating or adjusting the unit, record the
refrigerant quantity again.
NOTICE
•
Emissions of the fluorocarbons without any reason are
prohibited.
•
For disposal and maintenance of this product,
collection of fluorocarbons is required.
•
Additional Refrigerant Calculation for an indoor unit
with the Expansion Valve Kit
The additional refrigerant calculation for an indoor
unit with the Expansion Valve Kit is as follows. Refer
to item "Calculating Method of Additional Refrigerant
Charge W1".
1. Firstly, calculate the additional refrigerant amount
for the liquid pipe between Multi-Kit and the
Expansion Valve Kit according to the piping length
and diameter.
2. Then, calculate the additional refrigerant amount
for the liquid pipe between indoor unit and
the Expansion Valve Kit (Pipe diameter: ɸ6.35
Refrigerant Amount for 1m Pipe: 0.011kg/m) .
NOTE:
•
Refer to Tables 2.2 and 2.3 "System Combination" for
the number of indoor units and the expansion valve
kit connectable to the outdoor unit.
Calculate the additional
refrigerant charge quantity
0.011 kg per 1 m.
Calculate the additional
refrigerant charge quantity
depending on the piping
length and the piping size.
to Outdoor Unit
Multi Kit
A16381Z84L-rev.1
3 ~ 5 m
Indoor Unit
I 6.35 mm
Expansion
Valve Kit
L < 15 m: I 6.35 mm
15 m or more: I 9.52 mm
7. Air-Tight Test and Additional Refrigerant Charge
7.4 Charging Work
1. The additional refrigerant charge is required according
to the total piping length. Refer to Table 7.1.
2. After vacuum pumping work, check that the gas stop
valve and liquid stop valve are fully closed.
Charge the additional refrigerant from the check joint
of liquid stop valve (acceptable error must be within
0.5 kg).
3. After the refrigerant has been charged, fully open the
liquid stop valve and the gas stop valve.
NOTE:
•
The gas staying at O-ring or screw part may make
sound when removing the cap of the spindle.
However, it is not gas leakage.
4. If it is impossible to charge the specified quantity of
refrigerant, follow the procedure below.
a. Fully open the stop valve for the gas line.
CAUTION
•
Do not apply excessive force to the spindle valve
after fully opening the spindle. Otherwise,
the spindle valve flies out due to refrigerant
pressure. At the test run, open fully the spindle
valve, otherwise, the devices will be damaged.
(It is closed before shipment.)
< Caution for Opening Stop Valve >
•
Do not apply excessive force after fully opening the
spindle. (Tightening Torque: < 5.0 N·m)
(The back seat is not provided.)
•
When the valve is opened, remove the tags
"Close" (Accessories) and attach the tags "Open"
(Accessories) instead.
•
Tighten securely the caps according to the tightening
torque (Caution for Operation of Stop Valves in Item
7.1) after each spindle valve is opened.
Hexagonal Wrench
(To open or close spindle valve)
O-ring
(Rubber)
Hexagonal Wrench Size (mm)
Outdoor Unit (Base Unit)
8 - 12 HP
Standard
14 - 18 HP
Type
20 - 28 HP
8 - 10 HP
High Efficiency
12 - 16 HP
Type
18 - 22 HP
Check Joint
(Only the charging hose for
Cap
R410A can be connected.)
Refrigerant Pressure
Spindle Valve
Counterclockwise...Open
Clockwise...............Close
Closed before shipment
Liquid
Gas Valve
Valve
4
10
5
4
10
5
90
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