25
INSTALLATION – SOLAR STORAGE TANK
SOLAR WATER HEATER STORAGE TANK LOCATION
The solar storage tank is suitable for either outdoor or indoor installation. If an in-series gas booster is mounted
to the solar storage tank, then the installation must be outdoors. Whether located outdoor or indoor, the solar
storage tank should be installed close to the most frequently used outlet and its position chosen with safety
and service in mind.
Consideration must also be given to the position of the solar storage tank in relation to the solar collector(s).
There are limitations on the maximum length of the solar hot and solar cold pipes between the solar storage
tank and the solar collector(s). Refer to
on page 37, to
on page 39
and to
“Maximum height to collectors”
on page 40.
Clearance must be allowed for servicing of the solar storage tank and solar
control unit. The solar storage tank must be accessible without the use of
a ladder or scaffold. Make sure the temperature pressure relief valve lever
is accessible and the front cover, thermostat, anti-freeze heating unit,
controller cover, PCB and circulator can be removed for service.
You must be able to read the information on the rating plate. If possible
leave headroom of one water heater height so the anode can be inspected
or replaced. Remember you may have to remove the entire solar storage
tank later for servicing.
The solar storage tank is to be installed at ground or floor level and must
stand vertically upright on a stable base as acceptable to local authorities.
The base of the water heater is made of corrosion resistant material, and it
may be placed directly in contact with the supporting surface. It is not
necessary to allow for free air circulation under the base of the water
heater.
Note:
The water heater should not be placed in direct contact with a
concrete surface that is less than two months old and not fully cured as this
may attack the metal coating of the water heater base. A moisture barrier
should be used between the two surfaces in this instance. The barrier
should extend at least 100 mm from the water heater and may be trimmed
after two months.
Remember all local authorities have regulations about putting water heaters into roof spaces.
SAFE TRAY
Where damage to property can occur in the event of the water heater
leaking, the water heater must be installed in a safe tray. Construction,
installation and draining of a safe tray must comply with AS/NZS 3500.4
and all local codes and regulatory authority requirements. AS/NZS 3500.4
also has particular requirements when a safe tray must be installed.
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 the
on page 43).
Model
161
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
Min. mains supply pressure
200 kPa
* Expansion control valve not supplied with the water heater.
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