Installation Manual

11
WHL-015 REV. 12.17.14
PART 3 – TECHNICAL SPECIFICATIONS
MODEL
Residential Combi Boiler
Installation
Indoor, Floor Stand, Fully Condensing
Minimum / Maximum Input (Btu/Hr)
28,000 / 140,000
AFUE
92.7%
Hot Water Capacity
35
o
F Rise
7.1 Gal
45
o
F Rise
5.5 Gal
77
o
F Rise
3.2 Gal
Flue System
Sealed Combustion Direct Vent
Combined Vent Length
2” (50 feet), 3” (100 feet)
Shipping Weight (lbs est.)
250
Orifice Size
NG
0.232” (5.9 mm)
LP
0.185” (4.7 mm)
Gas Supply Pressure
NG
3.5” to 14” WC
LP
3.5” to 14” WC
Manifold Pressure
Min (2” / 3” Vent)
NG: -0.0039” / -0.002” WC
Max (2” / 3” Vent)
NG: -0.374” / -0.216” WC
Power Supply
Main Supply
120V 60 Hz / 6A
Maximum Power
Consumption
160W
Ignition System
Direct Electronic Ignition / Automatic Flame Sensing
Burner System
Single Orifice Premixed Fuel Modulation Ceramic Fiber Infrared
Gas Valve System
Combination Modulating (Current Proportional)
Internal Pipe Material
Copper
Dimensions
W 15.7” – H 53” – D 26.8”
Storage Tank Water Capacity (DHW)
Under 15 Gallons
Main Controller / Control Panel
GTX-920C / P-920C_CB-HTP
CH Pressure
Min 15 PSI - Max 30 PSI
DHW Pressure
Max 150 PSI
Connection
Sizes
DHW Inlet / Hot Water Outlet
¾” NPT
CH Supply / Return
1” NPT
Gas Inlet
½” NPT (1/2” X ¾” Bell Coupling Provided to Upsize Gas Line)
Materials
Cabinet
Cold Rolled Carbon Steel
Heat Exchanger
Primary Heat Exchanger: Stainless Steel
Storage Tank: Stainless Steel
Safety Devices
Flame Rod, Overheat Cut Off Device, Gas Valve Operation Detector, Exhaust
Temperature High Limit Sensor, Water Temperature High Limit Sensor
Table 3 – Technical Specifications