Precautions Concerning Piping Connection And Valve Operation - Mitsubishi Electric CITY MULTI PQHY-P-ZLMU Installation Manual

Heat source unit model
kg [LBS]
Heat source unit model
kg [LBS] 55.0 [122]
Heat source unit model
kg [LBS]
Heat source unit model
kg [LBS]
10.2. Precautions concerning piping
connection and valve operation
Removing the pinched connecting pipe
1 through 4 to remove the pinched connecting
1
2
3
pinched connecting pipe at the location shown in [Fig.10.2.1] and drain
4 2 and 3, heat the brazed section to remove the
pinched connecting pipe.
[Fig. 10.2.1] (P.10)
<A>
<B>
A
B
Service port
C
Cap
D
Pinched connecting pipe severing portion
E
Pinched connecting pipe brazing portion
Warning:
The areas between the refrigerant service valves and the pinched
and refrigerant oil in that section before heating the brazed section.
Caution:
Place a wet towel on the refrigerant service valve before heating the
Caution:
Refrigerant pipe connection
unit panels, or base plates.
Do not burn the wiring and plate when brazing.
28
P72 P120
P312S
P72 P120
32.0 [71] 33.0 [73]
P312S
70.0 [155]
[Fig.10.2.2] (P.10 - 11)
1
with heat source unit>
2
heat source unit>
3
source unit>
4
source unit>
5
with heat source unit>
6
with heat source unit>
7
heat source unit>
8
9
0
a
b
c
d
e
f
g
h
<A> Front pipe routing
<B>
<C>
A Shape
B
C
D
E
F
G
H
I
instructions included in the kit.
Pipe routing (for PQHY-P·ZLMU-A)
: Use the included connecting pipe 3 to connect.
P120
: Use the included connecting pipe 1, 2 to connect.
P72
connecting pipe 1 to connect.
Pipe routing (for PQRY-P·ZLMU-A)
P72
service valve piping.
: Use the included connecting pipe 1, 2 to connect.
P72
connecting pipe 1 to connect.
52.0 [115] 50.0 [111]