Rinnai new Zealand Limited
Hotflo Electric Storage Water Heater
Operation and Installation: 11151-C 03-10
9
Maintenance
your Rinnai Hotflo Electric Storage Tank requires little maintenance, but for maximum
performance the following is recommended.
Every six months:
TPR valve—operate easing gear
Every five years:
Check and service entire system and replace TPR valve and anode
if required
Temperature & Pressure Relief Valve (TPR)
This valve is located near the top of the tank and is essential for safe operation.
Every six months operate the easing gear to remove lime deposits and to verify that it is not
blocked. as this will discharge hot water, ensure no one is near the drain line.
danGER: Failure to operate the relief valve easing gear at least once every six months may
result in the water heater exploding. Continuous leakage of water from the valve may indicate
a problem with the water heater.
It is very important that you raise and lower the easing gear gently. during this operation, if
the valve does not discharge water when the easing gear is lifted, or does not seal again when
closed, attendance by an authorised person must be arranged immediately.
water
heater
drain line
lift until water
flows from drain
line, lower gently
during servicing of your tank 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 your cylinder.
Anodes in glass lined tanks
Storage tanks manufactured from metal can be susceptible to corrosion. The combined effects
of water pressure, temperature and water chemistry can create an aggressive environment
for corrosion of some materials. For this reason anodes are placed in glass lined tanks so as
to corrode first and should be changed every five years (more frequently in hard/aggressive
water areas).
Draining and filling the system
normally only occurs during installation or servicing and must be carried out by an authorised
person.
Turning the water heater off and on
If you plan to be away for only a few nights, we suggest you leave the system switched on. If
it is necessary to switch off the tank, the switch is usually marked and located in the electricity
box of the dwelling. When switching back on remember that the tank will take time to heat
back up again. This will be dependent on the size of tank you have purchased.
