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Rinnai Australia 25 Installation Manual
GENERAL INSTALLATION INSTRUCTIONS
(All Models)
This appliance must be placed as close as practicable to the most frequently used hot water outlet or
outlets to minimise the delay time for hot water delivery. For installations where the distance between
the water heater and the outlets is considerable, a flow and return system or the Rinnai Smartstart®
system can be used which minimise the waiting time for hot water delivery.
Alternatively, multiple appliances can be strategically placed to serve outlets with minimal delay time.
Contact Rinnai for further information.
An AC240V, 10 Amp, earthed power point must be provided adjacent to the appliance. For outdoor
installations this power point must be weather proof. It must be clear of the gas and water connections
to the appliance and also the flue exhaust and water pressure relief valve. The power cord of the
appliance is 1.5 Metres long.
All appliances must be installed to ensure access can be gained without hazard or undue difficulty for
inspection, repair, renewal or operational purposes. Sufficient clearances shall allow access to, and
removal of, all serviceable components. Appliances should not be mounted higher than 2.5 metres
above the ground or floor level unless the customer can arrange permanent and safe access or can
provide another means of access, for example, by means of scissor or boom lifts acceptable to local
authorities.
PIPE SIZING
See Table 1 page 26 for appliance gas consumption. 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 this appliance
as well as all the other gas appliances in 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.
Water pipe sizing and layout should be performed in accordance with AS/NZS 3500. All hot water
pipe-work should be insulated to optimise performance and energy efficiency.
WATER SUPPLY
See Table 1, page 26 for applicable water pressures. Approved pressure limiting valves may be
required if the ‘Maximum’ rated water supply pressures in Table 1 are exceeded. To achieve the rated
flow, the ‘Minimum’ water supply pressures in Table 1 must be supplied. The water heaters will
operate at lower pressures but will not achieve the rated flow. Contact Rinnai for ‘gravity fed’ or ‘low
pressure’ installations.
Water chemistry and impurity limits are detailed under ‘Warranty Conditions’. Most metropolitan water
supplies fall within the requirements. If you are unsure about your local water quality, contact your
water authority. If sludge or foreign matter is present in the water supply, a suitable filter or strainer
should be incorporated in the water supply to the water heater.
HOT WATER DELIVERY TEMPERATURE
Local regulations and or the requirements of AS/NZS 3500 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 may be limited to 50°C or less. To ensure these regulations and
or requirements are met the system MUST be installed in accordance with the 'Water Heater and
Controller Installation Configurations' Section of these instructions.
WATER HEATER AND CONTROLLER INSTALLATION CONFIGURATIONS
If the appliance is marked to state that it delivers water not exceeding 50°C, local regulations may
permit it's installation without a Temperature Limiting Device. Installations without a Temperature
Limiting Device are shown in Diagram 1 (page 26). If you are unsure about your local regulations
contact your regulating authority or Rinnai.
If the appliance is NOT marked to state that it delivers water not exceeding 50°C, or your local
regulations require installation with a Temperature Limiting Device then install the appliance in
accordance with Diagram 2 (page 26).
Ensure that suitable fixing screws or bolts are used to secure the units to the wall, in accordance with
AS/NZS 5601 section 6. Wooden plugs shall not be used.
The top bracket has a keyhole slot so that the appliance can be positioned by hanging it on one screw,
then the other screws can be secured.
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