Installation Sheet

64 Rinnai Tankless Water Heater Installaon and Operaon Manual
Tesng the pressure relief valve should only be
performed by a licensed professional. Water discharged
from the pressure relief valve could cause severe burns
instantly or death from scalds.
WARNING
FILTERS
• Water Filter — Clean the inlet water lter by closing
the cold and hot water inlet isolaon (shut-o) valves.
Put a bucket under the lter at the boom of the
water heater to catch any water that is contained
inside the unit. Unscrew the water lter. Rinse the
lter to remove any debris. Install the lter and open
the isolaon valves.
• Air Filter — See secon “5.2 Cleaning and Inspecng
the Air Filter” for more informaon.
• Bypass Filter (Crossover Mode Only) — Clean the
bypass lter (Note: Bypass lter is only used in
Crossover Mode).
PRESSURE RELIEF VALVE
Operate the pressure relief 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 safe place to ow.
Contact with your body or other property may cause
damage or harm.
FREEZE PROTECTION
Make sure 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 “Freeze Protecon”
secon (Secon 3.2 Choose an Installaon Locaon >
Freeze Protecon). The water heater may be drained
manually. However, it is highly recommended that drain
down solenoid valves be purchased and installed, which
will automacally drain the water heater if power is lost.
(The condensate trap drain plug and Pressure Relief
Valve are not aected by the auto drain down solenoid
valves and will have to be manually opened.)
WINTERIZATION
The following recommendaons are intended to suggest
pracces that 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.
Note: See secon “5.4 Draining the Water Heater” for
detailed instrucons on:
• Draining the water heater
• Running a low volume of water through the
water heater to prevent freezing
• Steps to take when the water heater or
external pipes have frozen
• 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.
• Condensate
Drain the condensate using the condensate drain
port on the boom of the water heater.
• 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.
SATISFACTORY
FRONT VIEW
BLUE FLAME
FLAME ROD
YELLOW FLAME
FLAME ROD
VISUAL INSPECTION OF FLAME
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 images
below:
UNSATISFACTORY FRONT VIEW