Installation manual

Rinnai Australia - 5 - HOTFLO Electric Storage Water Heater Operating/Installation Manual
WATER HEATER VALVES DISCHARGING EXCESSIVELY
Pressure and Temperature Relief (PTR) valve
It is normal and desirable that this valve allows a small quantity of water to be discharged during the heating cycle.
If it discharges more than a bucket of water during a 24 hour period or discharges continuously there may be
another problem.
If the valve dribbles continuously, try easing the valve gear for a few seconds as described under 'Regular Care'.
This may dislodge any foreign matter and alleviate the problem.
If the valve discharges at high flows, especially at night, it may be as a result of the water pressure exceeding the
design pressure of the water heater. Ask your installer to fit a Pressure Limiting Valve (PLV).
Expansion Control Valve (ECV) - if fitted
It is normal and desirable that this valve allows a small quantity of water to be discharged during the heating cycle.
If it discharges more than a bucket of water during a 24 hour period or discharges continuously there may be
another problem.
If the valve leaks continuously, try easing the valve gear for a few seconds as described under 'Regular Care'. This
may dislodge any foreign matter and alleviate the problem. If this does not alleviate the problem contact Rinnai.
SERVICE
The system should be checked and serviced by an authorised person at least every 5 years.
The PTR valve must be replaced at intervals not exceeding five (5) years.
Rinnai has a service and spare parts network with personnel who are trained and equipped to give the best service
on Rinnai appliances.
• Never replace the PTR valve with one which has a higher pressure rating than is specified
for your water heater.
• If the valve discharges hot water at high flows until the water heater is cold and then stops
discharging until the water reheats there may be a serious problem. Switch off the power
supply in the meter box (the switch marked ‘WATER HEATER’ or ‘HOT WATER’) or the
isolating switch installed near the water heater and contact Rinnai.
WARNING
SERVICING AND REPAIR