Rinnai Australia
12
Operation & Installation Manual
TROUBLESHOOTING
What Should I Check Before Making A Service Call?
If there is not enough hot water, it is recommended that the following points be considered before
making a service call. If after checking the following points the problem has not been identified, please
contact Rinnai on 1300 555 545.
No Hot Water
•
Is the Pressure & Temperature Relief Valve discharging too much water?
•
Do you have the correct size water heater for your requirements? Sizing details are available from
your Rinnai supplier.
•
Is one outlet (such as the shower) using more hot water than you think?
•
Carefully review the family's hot water usage and if necessary check the shower flow rates with a
bucket, measuring the amount of water used over that period of time. If it is not possible to adjust
water usage patterns, an inexpensive flow control valve can easily be fitted to the shower outlet.
•
Consider that during night time heating when the ambient temperature is cold, the time taken to heat
the tank can take longer so you may find that the tank has not fully recovered from a period of heavy
usage the previous evening.
•
Consider that often the hot water usage of showers, washing machines and dishwashers can be
under estimated. Review these appliances to determine if your daily usage is greater than the
storage volume of your water heater. For example, if you have a 170 litre storage tank and you are
using 300 litres of water it is possible that there will be certain times of the day where there is
insufficient hot water. It is also advisable to inspect tap washers etc. for leakage and replace if
necessary.
•
Is there a leaking hot water pipe or dripping hot water tap? A small leak can waste a large quantity of
hot water.
•
Replace faulty tap washers and have your plumber rectify any leaking pipe work.
Water Discharge from the PTR Valve
Pressure & Temperature Relief Valve (PTR)
It is normal for the PTR to allow a small quantity of water to escape during the heating cycle. The
amount of discharge will depend on hot water usage.
Continuous trickle (PTR)
This is most likely due to a build up of foreign matter. In this case try gently raising the easing lever
on the Pressure & Temperature Relief Valve for a few seconds then release gently. This may dislodge
a small particle of foreign matter and rectify the fault.
Steady flow (PTR) - more than 20L per day
This may be caused by excessive water supply pressure, a faulty Pressure & Temperature Relief
Valve or a faulty thermostat. Turn off the gas supply and contact Rinnai.
