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Gas Booster
Unless specifically designated as a internal model, the gas booster is designed for outdoor installation only. As
such, it must be located in an above ground open air situation with natural ventilation, without stagnant areas,
where gas leakage and products of combustion are rapidly dispersed by wind and natural convection� The location
must comply with the clearances specified in AS/NZS 5601. See page 24.
The gas booster must be mounted on a vertical structure with the water and gas connections on the underside
pointing downwards� In most installations the gas booster is mounted directly on the storage cylinder using two
custom made mounting brackets (supplied)� In all cases the heated outlet of the cylinder is connected to cold water
inlet of the gas booster�
GAS SUPPLY
The maximum gas consumption of the gas booster and the required gas pressure are shown on the appliance data
plate. If the gas pipe sizing is insufficient the customer will not get the full performance benefit. Gas pipe sizing
must consider the gas input to the gas booster as well as all the other gas appliances on the premises� The gas
meter and regulator must be specified for this gas rate. An approved sizing chart such as the one in AS/NZS 5601
should be used. An approved full flow isolation valve and disconnection union must be fitted to the gas supply inlet
of the gas booster. Isolation valves must not be fitted directly to the booster.
ELECTRIC SUPPLY
Electrical connection must only be carried out by a qualified person and in accordance with AS/NZS 3000 'Wiring
Rules' and local authority requirements.
For electrically boosted systems with the standard controller, the electrically boosted solar hot water heating
elements must be connected to an independent, fused, AC 240V 50 Hz power supply with an isolating switch
installed at the switch board� Ensure the household wiring to the system is capable of withstanding the system
electrical load (refer to specifications for electrical load details). Twin element models are factory wired for 'non'
simultaneous' operation�
For electrically boosted systems with the deluxe controller, the connection box within the solar controller must be
connected to an independent, fused, AC 240V, 15A, 50 Hz power supply with an isolating switch installed at the
switch board� Ensure the household wiring to the system is capable of withstanding the system electrical load
(refer to specifications and the controller manual for electrical load details).
The solar pump kit requires an AC 240V power supply from a 10A earthed power point adjacent to the storage
cylinder� For outdoor installations this power point must be weatherproof� This power supply is only used for
operating the controller and the pump� It must be independent from the power supply to any heating elements�
HOT WATER TEMPERATURE
Gas Boosted Systems
Gas boosters for use in solar hot water systems are preset to deliver a temperature of 70°C when the incoming
water temperature is below 55°C, and not to heat when the incoming water temperature is above 55°C, in
accordance with plumbing regulations� In addition, they contain the warning stating "Rinnai Water Controllers are
NOT compatible with solar hot water installations and MUST NOT BE USED in the vicinity of the temperature
controller connections inside the appliance�"
Electric Boosted Systems
To comply with Australian Standards the storage cylinder thermostat set point must be at least 60°C�
Hot Water Delivery Temperature
Local regulations and/or the requirements of AS/NZS 3500.4 must be considered regarding the temperature
limitations of hot water supplied to areas used primarily for personal hygiene� The temperature of water to these
areas is limited to 45°C for early childhood centres, primary and secondary schools and nursing homes or similar
facilities for young, aged, sick or people with disabilities and 50°C for all other buildings� To comply with these
requirements, a temperature limiting device, such as a thermostatic mixing or tempering valve, will be required on
all solar hot water systems�
Rinnai
19
INSTALLATION
Split Solar OIM
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