Rinnai new Zealand Limited
Hotflo Electric Storage Water Heater
Operation and Installation: 11151-C 03-10
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Installation: General information
Hot water storage and delivery temperatures
Sanitary fixtures delivery temperature
Water temperatures over 55 °C can cause severe scalds. Local regulations must be considered
regarding temperature limitations of hot water supplied to areas used primarily for personal
hygiene. The temperature is limited to 45 °C for early childhood centres, schools, nursing
homes or similar facilities and 55 °C for all other buildings.
To comply with these requirements, a temperature limiting device, such as a tempering or
thermostatic mixing valve will be required on all installations.
Water pipes
all hot water pipe work should be insulated with Polythene foam or equivalent insulation to
optimise performance and energy efficiency.
Water pipe sizing should be performed in accordance with aS/nZS 3500.4 and/or G12 aS1.
To prevent damage to the water heater when attaching pipe clips or saddles to the jacket, it is
recommended that self drilling screws with a maximum length of 12 mm are used. If drilling is
required take extreme care not to penetrate the inner cylinder. damage to the inner cylinder is
not covered by warranty.
Electrical supply and connections
Electrical connection must be carried out by a qualified person and in accordance with nZ
Electrical Regulations. The water heater must have the heating element connected to an
independent, fused, aC 230 V 50 Hz power supply with an isolating switch installed at the
switch board.
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The water heater must be filled with water prior to connection to the power supply
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disconnect all power prior to installation and commissioning
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Household wiring to the heater must be capable of withstanding the appliance load
WARNING
Connection to a supplementary heat source
When the water heater is connected to a supplementary heat source, such as a solar system,
heat pump or wetback, the system must be arranged so that the water does not exceed 80 °C
to prevent damage to the cylinder lining, operation of the TPR valve or the thermostat thermal
cutout. For a split solar system this can achieved by turning off the circulating pump once the
water being drawn from the cylinder exceeds 65 °C.
