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| Demand Rapid owner & installer guide 12949-B 02-19
Maintenance and servicing
Hot water systems, like cars, require regular maintenance and servicing. To ensure longevity of
your system we recommend the following.
Period
What needs to be done
Every six months
TPR valve(s)—operate the easing gear
Annually
Inspection and service of the entire hot water system, including
inspection of the flue system (if applicable), cleaning of the INFINITY
inlet water filter, draining and flushing of the cylinder if the water
supply contains excessive levels of silt
TPR valve(s)
Located near the top of the
cylinder—essential for safe
operation. The TPR valve(s)
automatically vent hot water if
the temperature or pressure of
the water in the cylinder gets
too high.
Every six months operate the
easing gear to remove lime
deposits and check that it is
not blocked. As the valve(s)
will discharge hot water,
ensure no one is near the
drain line.
Failure to operate the
relief valve easing gear
at least once every
six months may result
in the water heater
exploding.
Continuous leaking of water
from the valve(s) may indicate
a problem. It is important that
you raise and lower the easing
gear gently. During operation,
if the valve does not discharge
water when the easing gear
is lifted, or does not seal
again when closed, arrange
for an authorised person to
come and inspect the system
immediately.
During servicing of your
system the TPR valve
needs to be checked and/or
replaced. This needs to be
done by an authorised person
at intervals not exceeding
five years, or more frequently
in areas where the water is
classified as hard.
A TPR valve must not be
replaced with one that has a
higher pressure rating than
that specified for the cylinder.
Maintenance and servicing
Rinnai has a maintenance,
service, and spare parts
network with personnel who
are fully trained and equipped
to give the best advice on
your Rinnai product. Regular
maintenance and servicing
is not covered by the Rinnai
warranty.
For help locating a service
person on your area call
0800 746 624.
Lift until water flows
from the drain line,
lower gently
To
water
heater
To drain line
How to operate the easing gear
TPR position - top of cylinder
WARNING
