English
CAUTION: For your safety, DO NOT attempt repair of electrical wiring, gas piping, burners, or other
safety devices. Refer repairs to qualified service personnel.
20H Replacement Parts
Typical Installation (Some Items May Not Apply)
NOTICE: The National Fuel Gas Code (NFGC) mandates a manual gas shut- off valve: See (NFGC)
for complete instructions. Local codes or plumbing authority requirements may vary from the
instructions or diagrams provided and take precedent over these instructions.
Ser
vice
Exhaust outlet
Exhaust Collector
Anti-Freezer Thermostat
Thermostat
Anti-freezer
Heat Exchanger
Protection Device
Burner Assembly
Fan Assembly
Computer Board
Hot Water Temp. Sensor
Water Outlet
Water Inlet
Exhaust Outlet
Water Outlet
Connect Port Of Remote Control
Remote Control (Optional)
Power Cord
Gas Inlet
Water Inlet
Front Cover
Gas Inlet
Auto Water Flow
Adjust Device
Cold Water
Temp. Sensor
Gas Valve Asm.
Gas Distribution Pipe
Flame Sensor Pin
Ignition Pin A
Ignition Pin B
Heat Exchanger