McQuay MDS080B R - Page 19

©2005 McQuay International
18
d
i
a
m
e
t
e
r
diameter
so
Close-packed
packing
Hollow
packing
ball valve
(gas side)
A Valve stem
B Stopper pin
C Packing(accessory)
D Connecting pipe(accessory)
E Open
F Cap, copper packing
G Service port
H Flare nut
I Liquid pipe diameter
J Gas pipe diameter
K Field piping
ball valve
(liquid side)
o s
o s
A
B
C
D
J
K
H
G
I
F
E
E
● Insulation installation for
in-build through wall
Duct dimension
Diameter 6.35 ～ 25.4mm Diameter 28.58 ～ 41.3mm
Thickness Min 10mm Min 15mm
Heat resistance
Min100 ℃
7．
．．
．5 Ball valve installation and operation
● Ball valve operation steps:
（ 1 ） Operate the gas side ball valve:
① Uninstall the flange connector: to remove the flange connector from the piping;
② To stick the seal material to cover the inlet of the ball valve flange to avoid the dirt entry ;
③ To change the hallow seal pad;
④ To fix the flange connector and hallow sealed pad and fixed ball valve of gas side with screw bolt;
（ 2 ） Liquid side ball valve connecting: to expand the copper tube outlet, and connect the ball valve connector;
（ 3 ） Vacuum and in charge refrigerant, ensure to open the valve completely
（ 4 ） To calculate the additional refrigerant, and in charge to units accordingly;
（ 5 ） To check the looseness to avoid leakage of refrigerant;
●
●●
● Copper tube expanded connector dimension （ Unit: mm ）
External Diameter
mm inch
Diameter
Ф 6.35
1/4” 9.0
Ф 9.52
3/8” 13.0
Ф 12.7
1/2” 16.2
Ф 15.88
5/8” 19.4
Ф 19.05
3/4” 23.3
Matching screw specification （ Unit: mm ）
Diameter
mm inch
Diameter
Ф 6.35
1/4” 17.0
Ф 9.52
3/8” 22.0
Ф 12.7
1/2” 24.0
Ф 15.88
5/8” 27.0
Ф 19.05
3/4” 36.0
● When connecting liquid piping and liquid ball valve, to ensure the same axial and use wrench to fix it tightly;
Outside
diameter(mm)
Moment(N · m) Angle (˚ )
Ф 6.35
14~18 60~90
Ф 9.52
35~42 60~90
Ф 12.7
50~57.5 30~60
Ф 15.88
75~80 30~60
Ф 19.05
100~140 20~35