39
HOT WATER DELIVERY
This water heater can deliver hot water at temperatures up to 60°C, sufficiently hot to cause severe scalding.
Water at this temperature may be plumbed to fixtures where water hotter than 50°C is allowed, such as the
kitchen and laundry.
The installing plumber may have a legal obligation to ensure the installation of this water heater meets the
water temperature delivery requirements of the Plumbing Code of Australia so that heated water delivered to
fixtures and appliances used primarily for personal hygiene is at a temperature which is unlikely to scald.
It is necessary and we recommend that a temperature limiting device be fitted between the water heater and
the fixtures and appliances used primarily for personal hygiene such as in a bathroom, ensuite, public
amenities or other ablution areas, to reduce the risk of scalding.
The temperature limiting device used with a heat pump water heater should have a specified
‘minimum
temperature differential
’ between the hot water inlet and the tempered water outlet of no greater than 10°C.
Refer to the manufacturer’s specifications of the temperature limiting device.
If a pressure limiting valve is installed on the cold water line to the water heater and the cold water line to a
temperature limiting device branches off before this valve or from another cold water line in the premises, then
a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting device.
Where a temperature limiting device is installed adjacent to the water heater, the cold water line to the
temperature limiting device can be branched off the cold water line either before or after the isolation valve,
pressure limiting valve and non-return valve to the water heater. If an expansion control valve is required, it
must always be installed after the non-return valve and be the last valve prior to the water heater.
Two Temperature Zones Using a Temperature Limiting Device
CIRCULATED HOT WATER FLOW AND RETURN SYSTEM
A 270HAV model heat pump water heater cannot be installed as part of a circulated hot water flow and return
system in a building.
