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2
BOILER DIMENSIONS
VENT DAMPER
DRAFT HOOD
BLOCKED VENT
SAFETY SWITCH
DISPLAY
FRONT VIEW
GXH -WATER
10 3/4
4" to 9"
C
INSTALL
MANUAL
SHUT-OFF
VALVE 5 FT.
ABOVE
WHEN
REQUIRED
BY LOCAL
D
CODE
GAS
GROUND
32 3/4
VALVE
JOINT
UNION
FULL SIZE
13 1/4
SEDIMENT
TAP
REQUIRED
2 1/4
24 1/2
LEFT VIEW
GXH -WATER
Boiler Model
GXHII-95,115,135,155
ORIFICE SIZES indicated for Sea Level are factory installed in boiler unless otherwise specified by the local authority.
See VII, page 21 for burner input adjustment.
GAS VALVE CONNECTION Size is 1/2" f.p.t. for all sizes
COMBUSTIBLE FLOOR KIT increases all height dimensions by 1".
RAISED SLAB - When mounting boiler on a raised slab, the slabmust extend at least 2" beyond the boiler cabinet on all sides.
CHIMNEY HEIGHT: 15 ft. minimum from draft hood skirt to top of chimney.
CHIMNEY INSIDE DIAMETER must be same as Dimension "C" or larger. Larger diameter and/or height may be required if
two or more boilers or a boiler and another appliance are vented to a single chimney.
1/2" VENT
SUPPLY
TAPPING
PRESSURE
RELIEF VALVE
3/4"
TEMPERATURE/
PRESSURE
GAUGE
TEMPERATURE/
PRESSURE
JUNCTION
GAUGE
BOX
CIRCULATOR
RETURN
RIGHT SIDE VIEW
GXH -WATER
F
GAS SUPPLY
SUPPLY
H
J
E
RETURN
G
2 1/4
26 1/2
16 1/2
3
7 1/4
B
A
FRONT VIEW
GXH -WATER
GXHII HOT WATER BOILERS – DIMENSIONS IN INCHES
GXHII-95
A
23-1/2
B
16-1/2
C
5
D
50-5/8
E
11
F
9-3/4
G
1-1/4
H
2-1/2
J
3-1/2
K
9-3/4
Orifice
Gas
Size for
Type
Sea Level
2,000
Natural
45
46
Propane
55
55
ALTERNATE 1 1/2" RETURN
12 1/2
K
2 3/4
GAS VALVE
TANKLESS HEATER
CONNECTION "L"
GXH-PT ONLY
26
RIGHT SIDE VIEW
GXH -WATER
GXHII-115
GXHII-135
23-1/2
27
16-1/2
20
6
6
51-1/4
54-1/2
11
13
9-3/4
11-1/4
1-1/4
1-1/4
2-1/2
2-1/2
3-1/2
3-1/2
9-3/4
9-3/4
ORIFICE SIZES AT HIGH ALTITUDES
INCLUDES 4% INPUT REDUCTION FOR EACH 1000 FEET
ELEVATION–FEET
3,000
4,000
5,000
47
47
47
56
56
56
VENT DAMPER
DRAFT HOOD
BLOCKED VENT
SAFETY SWITCH
THERMOSTAT
TERMINAL
BEZEL
BRACKET FOR
HYDROSTAT
CONTROL
BURNERS
Location and identification of parts
(Front panel removed)
GXHII-155
27
20
6
52-1/2
11
11-1/4
1-1/4
2-1/2
3-1/2
9-3/4
6,000
7,000
8,000
48
48
49
56
56
57
GALAXY II
SUPPLY
PRESSURE
RELIEF
VALVE
TEMPERATURE/
PRESSURE
GAUGE
HYDROSTAT CONTROL
MODEL 3200-03
IGNITION
CONTROL
RETURN
ROLLOUT
SAFETY
SWITCH
GAS
MANIFOLD
9,000
10,000
49
50
57
57
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