Mitsubishi Electric CITY MULTI PUHY-HP-TJMU-A Instruction Manual page 12

Caution:
• Do not vent R410A into the atmosphere.
• Refrigerant pipe connection
This product needs connecting pipes for front piping and bottom post-piping (sold separately). (Refer to [Fig.10.2.2])
Check the liquid/gas piping dimensions before connecting the refrigerant pipe.
Refer to item 9.2 Refrigerant piping system 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>
6
<A> Front pipe routing
<Front piping and bottom post-pipting> (sold separately)
No.
1
IDø25.4 [1]
Shape
ODø25.4 [1]
<gas side>
P72 (CMY-HYS100CEB) 1pc.
P96 (CMY-YS300CEB)
• Front pipe routing
P72, P96
Liquid side Use the included connecting pipe 6 to connect.
P72
Use the included elbow 1 and connecting pipe 4 to connect.
Gas side
P96
Use the included elbow 2 and connecting pipe 5 to connect.
• Bottom pipe routing
Liquid side P72, P96 Expand the liquid side on-site piping (ID ø12.7 mm [1/2 in]) and connect to the refrigerant service valve piping.
P72
Use the included connecting pipe 4 to connect.
Gas side
P96 Use the included connecting pipe 5 to connect.
Satisfy the minimum insertion depth in the table below when expanding on-site
piping
Pipe diameter
(mm [in])
5 [7/32] or more, less than 8 [11/32]
8 [11/32] or more, less than 12 [1/2]
12 [1/2] or more, less than 16 [21/32]
16 [21/32] or more, less than 25 [1]
25 [1] or more, less than 35 [1-13/32]
35 [1-13/32] or more, less than 45 [1-25/32]
• After evacuation and refrigerant charging, ensure that the handle is fully
open. If operating with the valve closed, abnormal pressure will be imparted
to the high- or low-pressure side of the refrigerant circuit, giving damage to
the compressor, four-way valve, etc.
• Determine the amount of additional refrigerant charge by using the formula,
and charge refrigerant additionally through the service port after completing
piping connection work.
• After completing work, tighten the service port and cap securely so as not to
generate any gas leakage. (Refer to the table on the below for appropriate
tightening torque.)
Appropriate tightening torque:
Outer diameter of Cap
copper pipe (mm [in]) (N·m/kg·cm) (N·m/kg·cm)
ø9.52 [3/8] 15/150
ø12.7 [1/2] 20/200
ø15.88 [5/8] 25/250
ø19.05 [3/4] 25/250
ø25.4 [1] 25/250
ø28.58 [1-1/8] 25/250
12
<B>
12
45
45
A
B
A
B
<B> Bottom pipe routing
2
IDø28.58 [1-1/8]
IDø12.7 [1/2]
ODø28.58 [1-1/8]
<gas side>
1pc.
Minimum insertion depth
(mm [in])
6 [1/4]
7 [9/32]
8 [11/32]
10 [13/32]
12 [1/2]
14 [9/16]
Shaft Size of hexagonal Service port
wrench (mm) (N·m/kg·cm)
6/60 4
9/90 4
15/150 6 12/120
30/300 6
30/300 10
- - 16/160
Gas pipe (field supply required)
A
Liquid pipe (field supply required)
B
3 4
ODø19.05 [3/4]
ODø9.52 [3/8]
IDø25.4 [1]
<liquid side> <gas side>
1pc.
1pc.
Caution:
• Keep the valve closed until refrigerant charging to the pipes to be
added on site has been completed. Opening the valve before charging
the refrigerant may cause damage to the unit.
• Do not use a leak detection additive.
[Fig. 10.2.3]
A
Caution:
Make sure to seal-off the openings for the pipe and wire retrieval.
• Small animals, rainwater, or snow entering through the openings may
cause damage to the device.
(Unit : mm [in])
5 6
IDø12.7 [1/2]
ODø22.2 [7/8]
IDø28.58 [1-1/8] ODø12.7 [1/2]
<gas side> <liquid side>
1pc.
1pc. 1pc.
A Example of closure materials (field-
supplied)
B Fill the gap at the site
Make sure to seal-off the space around
areas where the wires and refrigerant
pipes enter the unit to ensure that small
animals, rainwater, or snow cannot
enter the unit through such openings
and cause damage to the unit.
B