10
THM0421 026512 Rev. C Apr 13
Thermann Owner’s Manual
250L to 400L Electric Storage Water Heaters
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
1300 412 612.
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
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, 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 315 litre storage tank
and you are using 450 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 Pressure &
Temperature Relief Valve (PTR)
It is not unusual for a small quantity
of water to discharge during the
heating of water in your storage
tank. The amount of discharge will
depend on hot water usage and size
of the storage tank. As a guide, it will
discharge 3% of the storage capacity
of water in the heating period.
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 PTR
Valve for a few seconds, then release
gently. This may dislodge a small
particle of foreign matter and rectify
the fault.
