Rinnai RU80i - Pressure Relief Valve; Visual Inspection of Flame; Freeze Protection; Winterizing

62 KB Series Manual

Operate the valve manually once a year. In doing so,
it will be necessary to take precauons with regard to
the discharge of potenally scalding hot water under
pressure. Ensure discharge has a place to ow.
Contact with your body or other property may cause
damage or harm.

Verify proper operaon aer servicing.
The burner must ame evenly over the enre surface
when operang correctly. The ame must burn with a
clear, blue, stable ame. See the parts breakdown of
the burner for the locaon of the view ports.
The ame paern should be as shown in the gures
below.

Make sure that in case of freezing weather that the
water heater and its water lines are adequately
protected to prevent freezing. Damage due to
freezing is not covered by the warranty. Refer to the
secon on Freeze Protecon.

These recommendaons are intended to suggest
pracces which are eecve for winterizing the water
heater. They should be used as a guide only. No
liability is assumed for any issues resulng from the
use of this informaon.
GAS
Shut o the gas to the water heater. It is generally
preferable to shut o the gas service to the enre
locaon if gas is not going to be used.
WATER
Shut o the cold water supply to the water heater. It
is generally preferable to shut o the water to the
enre locaon if water is not going to be used.
Drain the water heater by opening the drain valves on
the cold water line and hot water line.
Open several hot water taps and remove the lter
assembly at the water inlet in order to allow room for
expansion in case there is water in the lines that
freeze.
ELECTRIC
Disconnect the power supply by either unplugging the
electrical cord or by turning o the circuit breaker to
the water heater to prevent potenal damage from
irregular power surges or interrupons.
VENT TERMINATION
Place a cover over the vent terminaon (intake and
exhaust) if it can be safely accessed. The cover should
be easy to apply and remove. This will prevent
debris, leaves, and small animals from entering the
venng and water heater which could cause air ow
issues upon return to service.
Tesng the pressure relief valve should only be
performed by a licensed professional. Scalding hot
water may be released under pressure.
WARNING


FRONT VIEW
FRONT VIEW
BLUE FLAME
YELLOW FLAME
FLAME ROD
FLAME ROD