Bulletin 30-21 – Page 7
3-Way Hot Gas Defrost Valves
10G79B, 10G711B, 10G711C
INSTALLATION
CAUTION: The valve body must be wrapped with a wet cloth
while soldering to avoid damage to synthetic in ter nal parts.
While the valve’s steel body con struc tion will help avoid over-
heating of internal parts due to con duc tion, con vec tion of heat
up through the tubing and valve body while making bottom
con nec tions can dam age the in ter nal parts. If possible bench
assemble the valve utilizing stub tubes in a horizontal plane.
Cool the valve body thor ough ly af ter making each connection.
DIMENSIONS – Inches (mm)
Type A B C D E F
10G79B 1-1/8 (29) .91 (23) 6.00 (152) 1.81 (46) 9.79 (249)
1.56 (40)10G711B 1-3/8 (35) .97 (25) 5.87 (149) 1.74 (44) 9.79 (249)
10G711C 1-3/8 (35) .97 (25) 5.16 (131) 1.72 (44) 10.62 (270)
Type
Port
Size
Connection
ODF Solder
Inches
A B C D E F G H
(S)8D9B-SC 3/4 1-1/8
5.18
(132)
5.13
(130)
3.44
(87)
3.44
(87)
1.13
(29)
2.63
(67)
0.91
(23)
2.94
(75)
(S)12D11B-SC
1-1/4
1-3/8
6.87
(174)
6.94
(176)
4.19
(106)
4.19
(106)
2.38
(60)
4.25
(108)
0.97
(25)
(S)12D13B-SC 1-5/8
1.09
(28)
(S)16D17B-SC
(S)16D17C-SC
2 2-1/8
8.18
(208)
9.53
(242)
5.47
(139)
5.47
(139)
3.50
(89)
5.44
(138)
1.25
(32)
Suction
A
Pilot Valve
Piston
Upper Port
Lower Port/
Plate
Compressor
Discharge
Condenser B
Summer
Condenser A
Summer/Winter
B
C
D
E
G
H
F
Figure 7
Seat Disc
Optional 1/2”
Conduit Boss
1.64”
42 mm
INSTALLATION
Piping Suggestions
Valves must be installed in a horizontal or vertical position
with the coil level with, or above the valve body. Install Split
Condenser Valves so the connections are in the proper flow
direction as shown in Figure 7.
Figure 6 shows a piping schematic to illustrate the general
installation of the Split Condenser Valves. Sporlan recom-
mends that recognized piping references be consulted for
assistance in piping procedures. Sporlan is not responsible for
system design, any damage resulting from system design, or
for misapplication of its products.
Proper support of Split Condenser Valves, especially the larger
models, is essential because of possible vibrations of the pip-
ing and/or their location on the compressor racks. (For exam-
ple, a bracket located 2 to 3 inches from the 16D Discharge
and Condenser B socket solder joints is recommended.)
DIMENSIONS – Inches (mm)
A
B
3.44”/ 87 mm
1.50”
38 mm
7/8”
22 mm
4.95” / 126 mm 4.95” / 126 mm
2.89”
73 mm
F - Coil
Removal
B
A
E
3.95” / 100 mm
D
B
C
1.04”
26 mm
A
3.44”/ 87 mm
7/8”
22 mm
10G79B and
10G711B
4.95” / 126 mm 4.95” / 126 mm
A
B
C
D
F - Coil
Removal
E
2.89”
73 mm
2.41” / 61 mm
3.95” / 100 mm
10G711C
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