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240012994 Rev. B [08/31/2020]
9 - START UP PROCEDURE
9.1 Central Heating System Connections - Combi
GCWB95W-150 COMBI
MANIFOLD
GCWB95W-205 COMBI
LEGEND
150
205
A
Pressure Gauge
-
B
Pressure Relief Valve
30.00 psi [2.11 bar]
C
Heating return connection
3/4" [22.2 mm]
1" [25.4 mm]
D
Cold DHW inlet tap / system filling
connection for Combi
1/2"
[15.9 mm]
3/4" NPT
E
Gas shutoff connection
3/4" [22.2 mm]
F
Boiler Fast Fill
External to Boiler
NA
G
DHW outlet
1/2"
[15.9 mm]
3/4" NPT
H
Drain connection for condensate
13/16" [21 mm] ID
Hose
3/4 NPT
I
Heating supply connection
3/4" [22.2 mm]
1" [25.4 mm]
K
5 gpm DHW flow restrictor
(Factory installed) (205 only)
na
3/4"
[22.2 mm]
H
B
G
A
E
D
C
I
K
F
GCWB95W-150/205
A
B
H
I
C
G
E
K
D