2
ROUGH-IN DIMENSIONS
Figure 1.
IMPORTANT!
Refer to "Installation Clearances" section of manual
(page 7) for recommended service clearances prior
to boiler placement.
TOP VIEW
LEFT SIDE
TABLE 2. ROUGH - IN DIMENSIONS
AB CD EF
Model Inches cm Inches cm Inches cm Inches cm Inches cm Inches cm
GW/GB-1000 14.1 35.8 12.2 31.0 40.3 102.4 31.6 80.3 26.0 66.0 46.8 118.9
GW/GB-1300 24.8 63.0 12.2 31.0 40.3 102.4 31.6 80.3 39.3 99.8 57.3 145.5
GW/GB-1500 30.2 76.7 12.2 31.0 40.3 102.4 31.6 80.3 44.6 113.3 64.3 163.3
GW/GB-1850 27.7 70.4 11.2 28.4 43.0 109.2 32.3 82.0 44.0 111.8 78.3 198.9
GW/GB-2100 31.0 78.7 11.2 28.4 43.0 109.2 32.3 82.0 49.5 125.7 85.3 216.7
GW/GB-2500 38.1 96.8 10.5 26.7 43.0 109.2 32.3 82.0 56.5 143.5 99.3 252.2
Input Exhaust Inlet
TABLE 1: GAS AND ELECTRICAL CHARACTERISTICS
Manifold Pressure Electrical Characteristics
Model Type of Gas Inches W.C. kPa Volts/Hz Amperes
GW/GB-1000
thru 2500 NATURAL 3.5 0.87 120/60 30
GW/GB-1000
thru 2500 PROPANE 10 2.49 120/60 30
All Models - Maximum Supply Pressure: 14.0 In. W.C. (3.49 kPa)
Minimum Supply Pressure Natural Gas: 6.0 In. W.C. (1.22 kPa)
Minimum Supply Pressure Propane Gas: 11.0 In. W.C. (2.74 kPa)
Minimum Pressures must be maintained under both load and no load
(static and dynamic) conditions.
REAR VIEW
FRONT VIEW
BTU/Hr. KW BTU/Hr. KW Vent Diameter Vent Diameter Water Conn. Gas Inlet
Model Natural Gas Natural Gas Propane Gas Propane Gas Inches cm Inches cm Size
GW/GB-1000 990,000 289.95 990,000 289.95 10 25.4 8 20.3 2 1/2 NPT 2 NPT
GW/GB-1300 1,300,000 380.74 1,300,000 380.74 12 30.5 10 25.4 2 1/2 NPT 2 NPT
GW/GB-1500 1,500,000 439.31 1,500,000 439.31 12 30.5 10 25.4 2 1/2 NPT 2 NPT
GW/GB-1850 1,850,000 541.82 1,850,000 541.82 14 35.6 10 25.4 2 1/2 NPT 2 1/2 NPT
GW/GB-2100 2,100,000 615.04 2,100,000 615.04 14 35.6 12 30.5 2 1/2 NPT 2 1/2 NPT
GW/GB-2500 2,490,000 729.26 2,490,000 729.26 16 40.7 12 30.5 2 1/2 NPT 2 1/2 NPT
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