Rinnai Demand Duo R Series Installation And Operation Manual page 38

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The water heater is not subject to corrosive compounds in the air.
The water supply does not contain chemicals or exceed total hardness that will damage the heat
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exchanger.
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Balanced system piping for multiple units.
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Building recirculation pump is sized correctly.
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System check valves are installed for recirculation circuit.
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Clean the filter before leaving the job site.
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Clearances from the water heater unit are met.
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Clearances from the vent termination are met.
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A gas valve has been placed in the gas line to the water heater.
Ensure that a pressure relief valve is installed with a rating that exceeds the BTU input of the water
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heater model. Refer to the rating plate on the side of the water heater for BTU input.
Clean the inlet water filter by closing the cold and hot water inlet isolation (shut-off) valves. Put a
bucket under the filter at the bottom of the water heater to catch any water that is contained inside
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the unit. Unscrew the water filter. Rinse the filter to remove any debris. Install the filter and open the
isolation valves.
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Check the gas lines and connections for leaks.
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Confirm that the gas inlet pressure is within limits.
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Confirm that the water heater is rated for the gas type supplied.
Confirm that the electricity is supplied from a 120 VAC, 60 Hz power source, is in a properly
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grounded circuit, and turned on.
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Verify the temperature controller is functioning properly.
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Verify that SW 2 and SW 3 in DIPSW 1 is set correctly for your altitude. Maximum altitude is 5,400 ft.
Verify the system is functioning correctly by connecting your manometer to the gas pressure test
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port on the water heater. Operate all gas appliances in the facility at high fire. The inlet gas
pressure at the water heater must not drop below that listed on the rating plate.
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Install the front panel.
□ Explain to the customer the operation of the water heater, safety guidelines, maintenance, and war-
ranty.
The installation must conform with local codes or, in the absence of local codes, with the National
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Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA
B149.1.
Leave Installation and Operation Manual taped to the water heater, or give both manuals
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directly to the owner.
Demand Duo™ R-Series Installation and Operation Manual 38