Rinnai
7
HOTFLO (HFE Series) Electric Storage Water Heater OIM
SAFETY DEVICES
For safe operation this water heater is fitted with a combination Pressure & Temperature Relief Valve, a thermostat
and an over-temperature cut out for each heating element�
WARNING
DO NOT
tamper with or remove safety devices.
DO NOT
operatethiswaterheaterunlessallsafetydevicesarefittedandinworkingorder.
Theoperationofthethermalcutoutindicatesapossiblydangeroussituation.
DO NOT
reset the
thermalcutoutuntilthewaterheaterhasbeenservicedbyaqualifiedperson.
Pressure & Temperature Relief (PTR) Valve
This valve is located near the top of the water heater and is essential for safe operation�
WARNING
DO NOT
sealorblocktheoutletofthePTRvalveoritsdrainpipe.
DO NOT
replacethePTRvalvewithonethathasahigherpressureratingthanisspecifiedfor
the water heater.
The PTR valve should be checked for performance or replaced at intervals not exceeding 5 years, or more frequently
in areas with a high incidence of water deposits by a qualified person. The easing gear must be operated at least
once every six months or more frequently in areas with a high incidence of water deposits�
WARNING
Failure to do this may result in the water heater cylinder failing or under certain circumstances,
exploding.Waterdischargedwillbeveryhot.Exercisecaretoavoidscaldinjury.Ifthevalvedoes
notsealagainwhentheeasinggearisclosed,contactRinnaitoarrangeinspectionbyaqualified
person.
It is important you raise and lower the easing gear gently� If the valve does not
discharge water when the easing gear lever is lifted, there may be a serious
problem and the power supply in the meter box (the switch marked ‘Water
heater’ or ‘hot water’) or the isolating switch installed near the water heater
must be switched off immediately� Contact Rinnai to arrange inspection by
a qualified person.
It is normal for the PTR valve to release a small quantity of water through the drain pipe during heating� If the valve
dribbles or leaks continuously, try easing the valve gear for a few seconds� This may dislodge any foreign matter
and stop leakage� If leakage does not stop there may be a problem as detailed below:
•
If there are heavy flows of water until the water heater is cold which then stops until the water reheats there may
be a serious problem and the power supply in the meter box (the switch marked ‘Water heater’ or ‘hot water’) or
the isolating switch installed near the water heater must be switched off immediately� Contact Rinnai to arrange
inspection by a qualified person.
•
If there is a steady flow for long periods, often at night, it may be as a result of the water pressure exceeding the
design pressure of the water heater� Contact your installing plumber as a Pressure Limiting Valve (PLV) may
be required�
Expansion Control Valve (ECV)
An ECV is recommended in all geographical areas where the water supply has a tendency to cause scaling,
including South Australia and Western Australia. Local regulatory authorities may require that an ECV be fitted.
The ECV is to be supplied and fitted by the installer. Refer to the section Water Quality for more information on
scaling water�
If an ECV is fitted, operate the easing gear at least once every six months to remove any deposits and to verify
that it is not blocked�
The ECV should be checked for performance or replaced at intervals not exceeding 5 years, or more frequently in
areas with a high incidence of water deposits by a qualified person.
It is normal and desirable that the ECV allows a small quantity of water to be discharged through the drain pipe
during the heating cycle� If the valve dribbles or leaks continuously, operate the easing gear for a few seconds� This
may dislodge any foreign matter and stop leakage� If leakage does not stop Contact Rinnai to arrange inspection
by a qualified person.
Gently lift lever
until water flows
from drain line,
lower lever gently
to close
WARNINGS & SAFETY
