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Water Heater Installation Checklist
Product Handling
Carefully uncrate the heater. Move in place with a hand truck (DO NOT use the venting
pipes for handles).
Electrical Requirements
Make sure there is 120 volts line voltage. Line voltage must be properly polarized.
Adequate ground supplied to the heater.
Venting Requirements
All venting must stay within the required lengths and diameter (see table below). Proper
support of the venting pipe is required (every 5 ft. vertical and 3 ft. horizontal).
Termination must be located to prevent re-circulation of flue gases. Use factory supplied
intake and exhaust terminations.
Gas Requirements Refer to tab
Condensate Requirements
Condensate line needs to slope to a drain at a minimum of 1/4 in. per ft. Make sure the
condensate line does not have the potential to freeze. If using more than one heater
and using a common condensate line, make sure the condensate line is properly sized.
Service/Mechanical Room
Provide adequate space for servicing heater. Leave room to get to the bottom safety
switch as well as enough overhead room to remove the anode rods for servicing (18 in.
minimum).
Vent Tables
Power Direct Vent and Power Vent Maximum Vent Length
(Combined Maximum Length for Intake and Exhaust)
Air intake CANNOT exceed exhaust
by more than 30 ft
Note: Each 90° elbow is equivalent to 5 ft. (1.5 m) of straight pipe.
Note: Each 45° elbow is equivalent to 2 ½ ft. (0.8 m) of straight pipe.
120T-400-3N(A) 399,999 BTU/hr
120T-500-3N(A) 499,000 BTU/hr
Max. Intake Length 65 ft. N/A 65 ft. N/A
Max. Exhaust Length 65 ft. 65 ft. 65 ft. 65 ft.
Max. Intake Length 100 ft. N/A 100 ft. N/A
Max. Exhaust Length 100 ft. 100 ft. 100 ft. 100 ft.
Max. Intake Length 120 ft. N/A 120 ft. N/A
Max. Exhaust Length 120 ft. 120 ft. 120 ft. 120 ft.
The 120T models are NOT approved for 2 diameter vent pipe. Venting with 2 pipe may result in damage to the water
heater or cause an unsafe condition. DO NOT use 2 in vent or air intake pipe.
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