Dux sunpro 2F136S - Troubleshooting; Pre-Service Checks; Insufficient Hot Water

Owner’s Manual – Dux Electric Boosted Solar
25
H3161 025248 Rev. D
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 identied, please
contact Dux.
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.
Steady Flow (PTR) – More than
20L per day
This may be caused by excessive water
supply pressure, a faulty PTR Valve or a
faulty thermostat. Turn off the electricity
supply and contact Dux
on 1300 365
115.
Insufcient 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 Dux
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 ow 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 ow
control valve can easily be tted to
the shower outlet.
• Consider that during night time
heating, the time taken to heat the
tank can take longer (less energy
in the air) so you may nd 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. If
for example you have a 315 litre
storage tank and you are using
Troubleshooting