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3.
Before Installation
Check the Gas
• Check that the rating plate indicates the correct type of gas.
• Check that the gas supply line is sized for
157,000 Btuh for NRC711-OD series.
(120,000 Btuh for NRC661A-OD series.)
Check the Power
• The power supply required is 120VAC, at 60Hz.
May result in fire or electric shock.
Use Extreme Caution if Using With a Solar Pre-Heater
• Using this unit with a solar pre-heater can lead to unpredictable output temperatures and possibly scalding.
If absolutely necessary, use mixing valves to ensure output temperatures do not get to scalding levels.
Precautions for Mobile Home Installation
• Verify that the gas supply type matches the gas type listed on the rating plate. If a gas conversion
must be done, follow the instructions listed in the gas conversion kit manual.
Do Not Use Equipment for Purposes Other Than Those Specified
• Do not use for other than increasing the temperature of the water supply, as unexpected accidents
may occur as a result.
Check Water Supply Quality
• If the water supply is in excess of 12 grains per gallon (200 mg/L) of hardness, acidic or otherwise
impure, treat the water with approved methods in order to ensure full warranty coverage.
4.
Choosing Installation Site
* Locate the appliance in an area where leakage from the unit or connections will not result in damage
to the area adjacent to the appliance or to the lower floors of the structure. When such installation
locations cannot be avoided, a suitable drain pan, adequately drained, must be installed under the
appliance. The pan must not restrict combustion air flow.
* As with any water heating appliance, the potential for leakage at some time in the life of the product
does exist. The manufacturer will not be responsible for any water damage that may occur.
• This water heater is for outdoor installation only.
Never install it indoors.
Do not enclose the termination
with corrugated metal or other materials.
This will cause carbon monoxide
poisoning and a potential fire
hazard.
WARNING
CAUTION
DANGER
Indoor
3
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