INSTALLATION – SOLAR STORAGE TANK
31
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a minimum water supply pressure of 200 kPa
at the water heater cannot be achieved, then a pressure pump system must be installed to allow the collector
circuit system to operate. Care must be taken to avoid air locks. The cold water line from the supply tank should
be adequately sized and fitted with a full flow gate valve or ball valve.
HOT WATER DELIVERY
This water heater can deliver hot water at temperatures which on occasion could exceed 75°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 must be of a type suitable for use with a solar water heater. Refer to the
manufacturer’s specifications of the temperature limiting device.
Where a temperature limiting device is installed adjacent to the solar 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
and pressure limiting valve to the solar storage tank, but it
MUST BE
before a non-return valve. 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
solar storage tank.
Solar control unit, PN 052295 (introduced in the solar controller kit PN 299293 in August 2018) contains a non-
return valve at the inlet to the circulator. For a water heater fitted with this solar control unit, the non-return
valve installed on the cold water line to the tank, and after the cold water branch to a temperature limiting
device, is not required to be a dual check valve type.
If a combination isolation valve and non-return valve (duo or trio valve) is installed on the cold water line to the
solar water heater and the cold water line to the temperature limiting device branches off after this valve, then
a second non-return valve must be installed between the cold water branch and the solar storage tank.
If a pressure limiting valve is installed on the cold water line to the solar 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.
Two Temperature Zones Using a Temperature Limiting Device
LEGEND
Содержание Streamline 270
Страница 58: ...58 This page is intentionally blank ...
