ABOUT YOUR WATER HEATER
11
HOW HOT SHOULD THE WATER BE?
The heat pump is designed to operate until a water temperature of 60°C
is reached. If heating is required and the ambient air temperature is
outside of the heat pump’s operating range, the water temperature is
boosted automatically to 60°C by the electric heating unit.
Australian Standard AS/NZS 3500.4 ‘Plumbing and drainage – Heated
water services’ requires a water heater to store water at a temperature
not less than 60°C or the water heater to satisfy the requirements of
Australian Standard AS 3498, to inhibit the growth of legionella
bacteria.
If a Timer period is set or the heat pump is connected to an Extended
time-controlled power supply, this water heater meets these
requirements provided the heat pump is energised for a sufficient
period of time each day. Refer to “Timer Control” on page 12.
HOTTER WATER INCREASES THE RISK OF SCALD INJURY
Warning: This water heater can deliver hot water at temperatures up to 60°C, sufficiently hot to cause
severe scalding. Water at this temperature may have been plumbed to fixtures where water hotter than 50°C
is allowed, such as the kitchen and laundry.
Check the water temperature before use, such as when entering a shower or filling a bath or basin, to ensure
it is suitable for the application and will not cause scald injury.
We recommend and it may also be required by regulations that an approved temperature limiting device be
fitted into the hot water pipe work to the bathroom and ensuite when this water heater is installed. This will
keep the water temperature below 50°C at the bathroom and ensuite. The risk of scald injury will be reduced
and still allow hotter water to the kitchen and laundry.
TEMPERATURE ADJUSTMENT
The thermostat and sensors controlling the heat pump and the electric heating unit are factory set and not
adjustable.
HEAT PUMP OPERATION
The heat pump may take up to 5 minutes to commence operating when the power supply is switched on. The
heat pump will only operate when:
• power is available at the water heater, and
• the water in the storage tank requires heating, and
• the water temperature in the lower part of the water heater is 39°C or less.
If the ambient air temperature is below -5°C or above 43°C and the system calls for heating, the heat pump
will not operate, and the electric heating unit will operate instead.
When the heat pump is operating, the system may switch to the electric heating unit if it detects that the
ambient air temperature is below the minimum operating temperature of -5°C or above the maximum operating
temperature of 43°C. It may also switch back to heat pump operation from the electric heating unit if it detects
the ambient air temperature has moved back to within the heat pump’s operating temperature range.
Note: The heat pump may not turn on after having just completed a heating cycle and more hot water is drawn
from the water heater, or whilst the heat pump was operating and either power was switched off or it was
turned “Off” at the Display Panel. The heat pump will wait at least 3 minutes before operating and the conditions
for start-up are favourable.
DISPLAY PANEL AND USER CONTROLLED FUNCTIONS
The water heater has a display panel to indicate the status of the water heater. The Display Panel also allows
the user to select certain settings, such as Timer Control, Vacation Mode and Manual Electric Heating. Refer
to “Display Panel” on page 14.
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