INSTALLATION – SOLAR STORAGE TANK
15
SAFE TRAY
It is a requirement of AS/NZS 3500.4 that for a new installation,
a water heater be installed in a safe tray where in the event of a
leak, property may otherwise be damaged. Construction,
installation and draining of a safe tray must comply with the
above mentioned Standard.
FROST PROTECTION
The water heater has a frost protection system. The frost protection system will protect the water heater
from damage, by preventing ice forming in the waterways of the water heater, in the event of freezing
conditions occurring.
The solar collectors and solar cold and solar hot pipes only contain closed circuit fluid when the pump is
operating during periods of solar gain when heating is required. When the solar pump stops operating,
the closed circuit fluid drains back into the storage tank heat exchanger. The closed circuit fluid is an
anti-freeze agent which, when mixed to the correct specification, can withstand temperatures of -20°C
before it may freeze.
Damage to the water heater caused by freezing of the pipe work to or from the water heater is not
covered under warranty. Refer to AS/NZS 3500.4 for precautions to be taken for installations in frost
prone areas. The water heater is not suitable for installation in areas where the ambient temperature
falls below -20ºC.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below, an approved pressure
limiting valve is required and should be fitted as shown in the installation diagram
(refer to diagram on
page
26
)
.
Model 270
Relief valve setting
1000 kPa
Expansion control valve setting *
850 kPa
Max. mains supply pressure
With expansion control valve
680 kPa
Without expansion control valve
800 kPa
* Expansion control valve not supplied with the water heater.
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure pump system is not
installed, then the bottom of the supply tank must be at least 1 m above the highest point of the hot
water plumbing system, including the solar storage tank. Care must be taken to avoid air locks. The
cold water line to the water heater should be adequately sized and fitted with a full flow gate valve or
ball valve. Consideration must be given to any minimum water supply pressure requirements of an in-
series booster water heater.
