Gas Booster Location; Water Pipes; Water Supply - Rinnai Prestige Operation & Installation Manual

GAS BOOSTER LOCATION

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.

WATER PIPES

All hot water pipework should be insulated with sealed polyethylene foamed or equivalent insulation to optimise
performance and energy efficiency. Such insulation may also be mandatory under local regulations. Rinnai
recommend insulation to achieve an R value of 0.6 K.m2/W or higher depending on location. With the exception of
solar collector flow and return pipes, water pipe sizing should be performed in accordance with AS/NZS 3500. All
external pipework MUST be insulated to prevent frost damage.
The collector flow and return pipes should be a minimum of 15 mm copper tube. Plastic pipe must not
be used. Plastic pipe is not suited to the high water temperatures and pressures that may occur in the
collector flow and return system.
WARNING
The maximum recommended combined lengths of the solar flow and return pipes are as follows:
Collector Flow and Return Pipe Sizing.
Pipe Size
DN 15 (metres)
DN 20 (metres)

WATER SUPPLY

The maximum water pressures for the various systems are listed on page 13. Approved pressure limiting valves
may be required if the maximum rated water supply pressures are exceeded. For gas boosted systems to achieve
the rated flow through the outlet of the continuous flow water heater, the minimum water supply pressures must be
supplied. The systems will operate at lower pressures but the rated flow will not be achieved.
Water chemistry and impurity limits are detailed in the separate warranty document. Most metropolitan water
supplies fall within these requirements. If you are unsure about water quality, contact your water authority. If sludge
or foreign matter is present in the water supply, a suitable filter should be incorporated in the water supply to the
storage cylinder.
Rinnai
1 Collector
60
Not recommended
21
INSTALLATION - ALL SYSTEMS
2 Collectors
50
60
3 Collectors
30
40
Split Solar OIM