14
GB
D
Service port
Available for gas venting of the pinched connecting pipe, or vacuuming in the
refrigerant pipes on the site.
E
Cap
Remove the cap before operating the shaft. Be sure to return it to the original
position after completing the operation.
F
Pinched connecting pipe severing portion
G
Pinched connecting pipe brazing portion
Warning:
The sections between the refrigerant service valves and the pinched
FRQQHFWLQJSLSHVDUH¿OOHGZLWKJDVDQGUHIULJHUDQWRLO([WUDFWWKHJDV
and refrigerant oil in the above-mentioned pipe section before heating
the brazed section to remove the refrigerant service valve pinched
connecting pipe.
,IWKHEUD]HGVHFWLRQLVKHDWHGZLWKRXW¿UVWH[WUDFWLQJWKHJDVDQG
refrigerant oil, the pipe may burst or the pinched connecting pipe may blow
off and ignite the refrigerant oil, causing serious injury.
Caution:
Place a wet towel on the refrigerant service valve before heating the
brazed section to keep the temperature of the valve from exceeding
Û&>Û)@
'LUHFWWKHÀDPHDZD\IURPWKHZLULQJDQGPHWDOVKHHWVLQVLGHWKHXQLW
to prevent heat damage.
Caution:
Do not vent R410A into the atmosphere.
Refrigerant pipe connection
This product needs connecting pipes for front piping and bottom post-piping.
(Refer to [Fig.10.2.2])
Check the liquid/gas piping dimensions before connecting the refrigerant
pipe.
Refer to the table below for piping dimensions.
Make sure that the refrigerant pipe is not touching other refrigerants pipes,
unit panels, or base plates.
Be sure to use non-oxidative brazing when connecting pipes.
Be careful not to burn the wiring and plate when brazing.
<Refrigerant piping connection examples>
[Fig.10.2.2]
<A> <B>
<C>
<D>
<C>
<D>
A
B
C
D
E
F
A
D
E
F
<A> Front pipe routing
<B> Bottom pipe routing
<C> Liquid side
<D> Gas side
A
Refrigerant service valve piping
B
On-site piping (Adjust the pipe's position to the knockout hole.)
C
Elbow
D
Reducer etc.
E
On-site piping (gas connecting pipe)
F
On-site piping (liquid connecting pipe)
(Unit: mm [in])
Model
Diameter
Refrigerant pipe
Service valve
Liquid
Gas
Liquid
Gas
P72
ø9.52 [3/8] Brazed *1
ø22.2 [7/8]
Brazed *2
ø9.52
[3/8]
ø28.58
[1-1/8]
P96
ø9.52 [3/8] Brazed *1
(ø12.7 [1/2] Brazed) *2, *4
P120
ø9.52 [3/8] Brazed *2
(ø12.7 [1/2] Brazed) *1, *3, *5
ø28.58 [1-1/8]
Brazed *1
ø12.7
[1/2]
P144
ø12.7 [1/2] Brazed *1
*1 Expand the on-site piping and connect to the refrigerant service valve piping.
8VHWKHSLSHMRLQW¿HOGVXSSO\DQGFRQQHFWWRWKHUHIULJHUDQWVHUYLFHYDOYH
piping.
*3 In the case the unit is used in combination with other outdoor units.
*4 Furthest piping length (OU from IU) 90 m [295 ft]
*5 Furthest piping length (OU from IU) 40 m [131 ft]
Value of
D
Total capacity of connecting indoor units
D
Models
~ 27
2.0 kg
[71 oz]
Models 28 ~ 54
2.5 kg
[89 oz]
Models 55 ~ 126
3.0 kg
[106 oz]
Models 127 ~ 144
3.5 kg
[124 oz]
Models 145 ~ 180
4.5 kg
[159 oz]
Models 181 ~ 234
5.0 kg
[177 oz]
Models 235 ~ 273
6.0 kg
[212 oz]
Models 274 ~ 307
8.0 kg
[283 oz]
Models 308 ~ 342
9.0 kg
[318 oz]
Models 343 ~ 411
10.0 kg
[353 oz]
Models 412 ~ 480
12.0 kg
[424 oz]
Models 481 ~
14.0 kg
[494 oz]
<Amount of factory charged refrigerant>
Outdoor unit model
Charged amount
P72
9.0 kg
P96
11.5 kg
P120
11.8 kg
P144
11.8 kg
10.2. Precautions concerning piping
connection and valve operation
Conduct piping connection and valve operation accurately and carefully.
Removing the pinched connecting pipe
When shipped, a pinched connecting pipe is attached to the on-site liquid
and gas valves to prevent gas leakage.
Take the following steps
1
through
4
to remove the pinched connecting
pipe before connecting refrigerant pipes to the outdoor unit.
1
Check that the refrigerant service valve is fully closed (turned clockwise
all the way).
2
Connect a charging hose to the service port on the liquid/gas refrigerant
service valve, and extract the gas in the pipe section between the
refrigerant service valve and the pinched connecting pipe.
3
After vacuuming gas from the pinched connecting pipe, sever the
pinched connecting pipe at the location shown in [Fig.10.2.1] and drain
the refrigerant.
4
After completing
2
and
3
heat the brazed section to remove the
pinched connecting pipe.
[Fig. 10.2.1]
O
S
D
D
B
A
F
G
E
C
<A>
<B>
<A> Refrigerant service valve (liquid side/brazed type)
<B> Refrigerant service valve (gas side/brazed type)
A
Shaft
Fully closed at the factory, when connecting the piping, and when
vacuuming. Open fully after these operations are completed.
<When opening>
7XUQWKHVKDIWFRXQWHUFORFNZLVHZLWKDKH[DJRQDOZUHQFK
7XUQDURXQGWKHVKDIWXQWLOLWVWRSV
<When closing>
7XUQWKHVKDIWFORFNZLVHZLWKDKH[DJRQDOZUHQFK
7XUQDURXQGWKHVKDIWXQWLOLWVWRSV
B
Shaft
Fully closed at the factory, when connecting the piping, and when
vacuuming.
Open fully after these operations are completed.
<When opening>
7XUQWKHVKDIWFRXQWHUFORFNZLVH
7XUQDURXQGWKHVKDIWXQWLOLWVWRSV
<When closing>
7XUQWKHVKDIWFORFNZLVH
7XUQDURXQGWKHVKDIWXQWLOLWVWRSV
C
Stopper pin
3UHYHQWVWKHVKDIWIURPWXUQLQJÛRUPRUH
