Kelvinator heat pump hot water system
using your hot water system 7
Water temperature operating range
The heat pump has been designed to achieve maximum
efficiency and reduce greenhouse gas emissions. It
maintains the water inside the storage tank between 47°C
and 60°C, these temperature settings can not be modified
by the installer or customer. While this may be less than
the temperature setpoint of previously installed hot water
systems, it is still well above showering temperature. A
tempering valve has been supplied and installed with the hot
water system as an important and required safety measure. If
a tempering valve wasn’t previously installed this may create
a noticeable difference to the temperature or pressure of
the hot water at the fixtures. To maximise the amount of hot
water available and to save water it is recommended to install
and use 3 or 4 star WELS rated showerheads (previously
called AAA rated).
Bacteria and Legionella control
Once a week the heat pump will operate at a higher set
point and heat water up to 60°C. This function protects your
household by sanitising the water inside the storage tank to
prevent Legionella and other bacteria from causing a health
hazard. The heat pump will operate on this higher set point
for up to 24 hours and then revert back to the normal set
point for the remainder of the week. By default the heat
pump starts up in this sanitisation function for added safety,
and as such the weekly cycle will be reset if the heat pump
continuous power supply is switched off and on.
Ambient temperature range of the heat pump
In order for the heat pump to operate correctly, the ambient
temperature should be between -7°C and 50°C. If the
ambient temperature is outside this range the heat pump
may not operate.
Fan speed during heat pump’s heating operation
During the heat pump’s heating operation, the fan speed
will vary according to the outdoor ambient temperature and
may even stop completely. This optimises the performance
of the heat pump heating operation and is part of its
normal operation.
Heat pump freeze protection
The heat pump is suitable for use in frost conditions, however
in order for the freeze protection mechanism to operate there
must be power available to the heat pump. For this reason,
when installed in location where frost can occur the heat pump
MUST be installed on continuous only power supply. If the heat
pump is to be without power for a long period of time due to
power failure, maintenance or periodic shut down and there
is a risk of frosty conditions, the heat pump could become
damaged due to freezing. Follow the instructions in this manual
to isolate and drain the hot water system in order to protect it
from being damaged due to freezing. If it is suspected that the
heat pump has become frozen, ensure that power is available
and then call a service technician to inspect it. Resulting freeze
damage may not be covered under warranty if the above
requirements are not followed.
Periodic shut down of the hot water system
If power is to be switched off to the hot water system for
extended periods of time due to non usage or maintenance
of the hot water system, it is recommended that the system be
drained of water to prevent damage due to freezing. Follow the
instructions on page 8 of this manual to safely drain and then
re-fill the hot water system as required.
Water quality
Water quality can vary in different locations and affect the
performance and safe operation of the hot water system.
If the water quality is not within the acceptable limits as
indicated on this page, the hot water system should not be
installed and may not be covered by the Electrolux warranty.
Using your hot water system
Using your hot water system
A suitable solution is to implement a water pre-treatment
process (e.g. a water softener) to bring the water quality to
within acceptable limits to support the installation.
The saturation index (SI) is a measure of the corrosive or
scaling properties of the water supply. Corrosive water
(SI<-1.0) can corrode copper components. In these
conditions the warranty may not apply. Scaling water (SI>0.5)
can cause build up of CaCO3 (Calcium carbonate) which can
impact to the correct operation of moving parts within the
system, including the temperature and pressure relief valve.
In these conditions the warranty may not apply.
Total Dissolved Solids (TDS) and water hardness can also
impact the life of the hot water system, and warranty does
not apply outside the following limits:
• TDS exceeding 600 p.p.m
• Electrical conductivity exceeding 850us/cm
• Total hardness exceeding 200 p.p.m
• Chloride exceeding 250 p.p.m
• Magnesium exceeding 10 p.p.m
• Sodium exceeding 150 p.p.m
• Acidity/Alkalinity must also be within the limits of
pH 6.5 - 8.5
Heat pump protection devices
The heat pump is programmed to prevent unsafe conditions
occurring and to protect itself from damage. When power is
applied to the heat pump it will not start until it has several
minutes of uninterrupted power supply to protect it from
excessive cycling of the power supply. The heat pump may
stop operating and become locked out due to a fault if some
of the following occur:
• Air inlet or outlet is blocked
• Water inlet or outlet is blocked
• Air mix in water or refrigerant
• Refrigeration circuit pressure is too high
• Supply voltage is outside the accepted range
• Temperature sensor has been damaged or removed from
storage tank
• Temperature sensors inside heat pump become faulty
or damaged
Temperature and Pressure Relief valve (TPR valve)
A temperature and pressure relief valve has been installed
at the top of the storage tank to the right of the outlet
connection. It is essential to the safe operation of your hot
water system and may activate if an unsafe condition arises.
The relief valve is designed to allow a small amount of hot
water to discharge during heating to allow for hot water
expansion. Over the course of a day this could add up to a
few litres but if it continually leaks when the heat pump is not
operating it may need to be checked and gently operated.
Running out of hot water
If you find you are occasionally running out of hot water, it
may be wise to review your household's hot water usage.
Since this hot water system is designed as an energy saving
appliance, you should consider adjusting your water usage
accordingly. Install more efficient appliances e.g. washing
machines or dishwashers and water saving fixtures e.g. 3 or 4
star WELS rated showerheads. If the number of people in the
household has increased, consider installing a larger capacity
storage tank or changing the power supply from extended
off peak to continuous.