McQuay MDS080B R Installation Manual page 19

● Insulation installation for
in-build through wall
Thickness
Heat resistance
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;
E
A
o s
B
C
D
ball valve
(gas side)
J
● ● ● ● Copper tube expanded connector dimension
External Diameter
mm
Ф 6.35
Ф 9.52
Ф 12.7
Ф 15.88
Ф 19.05
Matching screw specification
Diameter
mm
Ф 6.35
Ф 9.52
Ф 12.7
Ф 15.88
Ф 19.05
● When connecting liquid piping and liquid ball valve, to ensure the same axial and use wrench to fix it tightly;
Outside
diameter(mm)
Ф 6.35
Ф 9.52
Ф 12.7
Ф 15.88
Ф 19.05
Diameter 6.35 ～ 25.4mm
Min 10mm
E
F
o s
G
A Valve stem
B Stopper pin
C Packing(accessory)
D Connecting pipe(accessory)
E Open
I
H
F Cap, copper packing
G Service port
ball valve
H Flare nut
(liquid side)
I Liquid pipe diameter
J Gas pipe diameter
K
K Field piping
Diameter
inch
1/4" 9.0
3/8" 13.0
1/2" 16.2
5/8" 19.4
3/4" 23.3
Diameter
inch
1/4" 17.0
3/8" 22.0
1/2" 24.0
5/8" 27.0
3/4" 36.0
Moment(N · m)
14~18
35~42
50~57.5
75~80
100~140
Duct dimension
Min100 ℃
Angle (˚ )
60~90
60~90
30~60
30~60
20~35
Diameter 28.58 ～ 41.3mm
Min 15mm
o s
（ Unit: mm ）
（ Unit: mm ）
diameter
©2005 McQuay International
18
Close-packed
packing
Hollow
packing