Installation manual
8
250C7Y1B
Split system air conditioner
4PW34720-1G – 07.2010
■
If there is a possibility that condensation on the stop valve might
drip down to the indoor side through gaps in the insulation and
piping because the outdoor unit is located higher than the indoor
unit this must be prevented by sealing up the connections. See
figure 20
.
7.10. Checking of unit and installation conditions
Be sure to check the following:
1
Make sure there is no faulty power wiring or loosing of a nut. See
"8. Field wiring" on page 11
.
2
Make sure there is no faulty transmission wiring or loosing of a
nut. See
"8. Field wiring" on page 11
.
3
Make sure there is no faulty refrigerant piping. See
"7. Refrigerant piping" on page 4
.
4
Make sure piping size is correct. See
"7.1. Selection of piping
material" on page 4
.
5
Make sure insulation work is done. See
"7.9. Pipe insulation" on
page 7
.
6
Make sure insulation resistance of main power circuit is not
deteriorated.
Using a megatester for 500
V, check that the insulation
resistance of 2 M
Ω
or more is attained by applying a voltage of
500 V DC between power terminals and earth. Never use the
megatester for the transmission wiring (between outdoor and
indoor unit, outdoor and COOL/HEAT selector, etc.).
7.11. Stop valve operation procedure
Introduction
Confirm the sizes of the stop valves connected to the system
referring to the table below.
Opening stop valve
1.
Remove the cap and turn the valve counterclockwise with the
hexagon wrench.
2.
Turn it until the shaft stops.
Do not apply excessive force to the stop valve. Doing so may
break the valve body, as the valve is not a backseat type. Always
use the special tool.
3.
Make sure to tighten the cap securely.
Closing stop valve
1.
Remove the cap and turn the valve clockwise with the hexagon
wrench.
2.
Securely tighten the valve until the shaft contacts the main body
seal.
3.
Make sure to tighten the cap securely.
For the tightening torque, refer to the table below.
(See figure 18)
CAUTION
■
Always use a charge hose for service port connection.
■
After tightening the cap, check that no refrigerant leaks are
present.
7.12. Additional refrigerant charge
Important information regarding the refrigerant used
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol. Do not vent gases into the atmosphere.
Refrigerant type:
R410A
GWP
(1)
value:
1975
(1)
GWP = global warming potential
Please fill in with indelible ink,
■
➀
the factory refrigerant charge of the product,
■
➁
the additional refrigerant amount charged in the field and
■
➀
+
➁
the total refrigerant charge
on the fluorinated greenhouse gases label supplied with the product.
The filled out label must be adhered on the inside of the product and
in the proximity of the product charging port (e.g. on the inside of the
service cover).
1
Liquid line stop valve
2
Gas line stop valve
3
Indoor -outdoor interconnection piping
4
Sealing up treatment
5
Heat insulator
Be sure to insulate local pipes, as touching them can
cause burns.
Do not open the stop valve until the steps
1
~
6
of
"7.10. Checking of unit and installation conditions" on
page 8
are completed. If the stop valve is left open without
turning on the power, it may cause refrigerant to buildup in
the compressor, leading to insulation degradation.
Model
Liquid line stop valve
Gas line stop valve
RZQ200
Ø9.5
Ø22.2
RZQ250
Ø9.5
➞
12.7 (with reducer)
Ø22.2
Tightening torque (N•m) (Turn clockwise to close)
stop
valve
size
Shaft (valve body)
Cap
(valve lid)
Service
port
Flare nut
Gas line
piping
attached
to unit
Ø9.5
5.4~6.6
Hexagonal
wrench
4 mm
13.5~16.5
11.5~13.9
33~40
—
Ø12.7
8.1~9.9
18~22
50~60
Ø15.9
13.5~16.5
Hexagonal
wrench
6 mm
23~27
62~75
Ø22.2
27~33
Hexagonal
wrench
10 mm
36~44
—
22~28
Ø25.4
1
Service port
2
Cap
3
Hexagon hole
4
Shaft
5
Seal
NOTE
National implementation of EU regulation on certain
fluorinated greenhouse gases may require to provide
the appropriate official national language on the unit.
Therefore, an additional multilingual fluorinated
greenhouse gases label is supplied with the unit.
Sticking instructions are illustrated on the backside of
that label.
3
5
6
2
1
4
1
factory refrigerant charge
of the product:
see unit name plate
2
additional refrigerant
amount charged in the
field
3
total refrigerant charge
4
Contains fluorinated
greenhouse gases
covered by the Kyoto
Protocol
5
outdoor unit
6
refrigerant cylinder and
manifold for charging
