There is a risk in using fuel burning appliances such as gas water heaters in rooms, garages or other areas where gasoline, other flammable liquids or engine driven equipment or vehicles are stored, operated or repaired. Flammable vapors are heavy and travel along the floor and may be ignited by the water heater’s igniter or Main Burner flames causing fire or explosion.
Flammable items, pressurized containers or any other potential fire hazardous articles must never be placed on or adjacent to the water heater.
Clearance To Combustible Materials
The water heaters covered in this manual are approved for installation on combustible flooring. The clearance to combustible and non combustible construction materials is 0 inches on the back and sides of the water heater. These water heaters are also approved for installation in an alcove.
Note: Adequate clearance for servicing should be maintained on all installations. See Service Clearance below.
ALCOVE | CLEARANCES TO COMBUSTIBLE |
| AND NON COMBUSTIBLE |
| CONSTRUCTION MATERIALS |
TOP COVER |
|
| 0 |
| 0 |
WATER | 0 |
HEATER |
|
FRONT |
|
| FRONT |
FRONT VIEW | TOP VIEW |
|
Figure 7
Service Clearance
A service clearance of 24 inches (61 cm) should be maintained from serviceable parts such as the T&P valve, control system components, gas valve, clean out opening, drain valve, the vent connection (exhaust elbow) and the condensate drain. Leave as much room as possible above the water heater and near the exhaust elbow for this reason. See Figure 9 on page 17.
Intake Air and Vent Pipe Clearances
The minimum clearance from combustible materials for the vent (exhaust) and intake air piping shall be 0 inches. Vent or intake air piping passing through a combustible wall or ceiling must be a continuous run (no joints).
Extended Vent Terminations
The water heaters covered by this manual can be installed using 3 inch pipe for the intake air and/or vent piping up to a maximum of 50 equivalent feet (15.2 m). The intake air and/or vent piping can be extended up to 120 equivalent feet (36.5 m) by installing 4 inch pipe. See the Venting Requirements on page 24.
The water heater ships from the factory with two (2) 3 inch terminations that are 45° PVC elbows with a debris screen installed. When 4 inch intake air or vent pipe is installed, factory supplied 4 inch terminations must be used.
Contact your local distributor or call the parts department phone number listed on the back cover of this manual to order 4 inch termination(s).
Optional Concentric Terminations
The water heaters covered in this manual can be installed in a Direct Vent configuration using an optional concentric termination. See Concentric Termination Installation on page 30.
Hard Water
Where hard water conditions exist, water softening or the threshold type of water treatment is recommended. This will protect the dishwashers, coffee urns, water heaters, water piping and other equipment. See Maintenance on page 64 for sediment and lime scale removal procedures.
Circulation Pumps
A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the water heater. See the Water Piping Diagrams beginning on page 71 for installation location of circulating pumps.
See Circulation Pump Wiring Diagrams on page 70 for electrical hookup information. Install in accordance with the current edition of the National Electrical Code, NFPA 70 or the Canadian Electrical Code, CSA C22.1.
Some circulating pumps are manufactured with sealed bearings and do not require further lubrication. Some circulating pumps must be periodically oiled. Refer to the pump manufacturer’s instructions for lubrication requirements.
Insulation Blankets
Breathing Hazard - Carbon Monoxide Gas
Do not obstruct water heater air intake with insulating blanket.
Gas and carbon monoxide detectors are available.
Install water heater in accordance with the instruction manual.
Breathing carbon monoxide can cause brain damage or death. Always read and understand instruction manual.
Insulation blankets are available to the general public for external use on gas water heaters but are not necessary with these products. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank heaters. The water heaters covered by this manual meet or exceed the Energy Policy Act standards with respect to insulation and standby heat loss requirements, making an insulation blanket unnecessary.
Should you choose to apply an insulation blanket to this heater, you should follow these instructions. See the Features and Components section of this manual for identification of components mentioned below. Failure to follow these instructions can restrict the air flow required for proper combustion, potentially resulting in fire, asphyxiation, serious personal injury or death.
•Do not apply insulation to the top of the water heater, as this will interfere with safe operation of the blower assembly.
•Do not cover the control system LCD on top of the water heater.
•Do not cover the
•Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference.
•Do obtain new warning and instruction labels from the manufacturer for placement on the blanket directly over the existing labels.
•Do inspect the insulation blanket frequently to make certain it does not sag, thereby obstructing combustion air flow.
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