Electrical Supply; Valves And Fittings - Rinnai HOTFLO HFE Series Operation & Installation Manual

Electrical Supply

Electrical connection must be carried out by a qualified person and in accordance with AS 3000 'Wiring Rules' and
local authority requirements.
A water heater not fitted with a power cord & plug must have the heating element connected to an independent,
fused, AC 240V 50 Hz power supply with an isolating switch installed at the switch board, which shall effectively
isolate all active supply conductors from the circuit and means for disconnection must be incorporated in the fixed
wiring in accordance with the wiring rules. Ensure the household wiring to the system is capable of withstanding
the system electrical load (refer to Specifications - Table 1 for electrical load details).
A water heater fitted with a power cord & plug must be plugged into a switched, AC 240V AC, 50 Hz mains power
outlet rated at 10 Amps. A power cord is available for replacement. Please contact Rinnai Customer Care for part
number.
The power supply to a single element model can be Off-Peak (overnight), Extended Off-Peak (overnight and day),
or Continuous (day).
The power supply to a twin element model should be Off-peak (overnight) to bottom heating element and
Continuous to the top heating element.
Check the avaible tariffs with the local electricity supplier. The Off-Peak (overnight) is usually the most economical
for the customer.

Valves and fittings

Valves & fittings supplied with water heater are placed in the Styrofoam packaging base during transit.
The pressure ratings of valves are shown in Table 1.
1. A combined Pressure & Temperature (PTR) Relief Valve (supplied). This valve is fitted at the top of the
storage cylinder. The PTR valve is a safety device and it is mandatory that it is fitted by the installer in all
installations.
2. Three brass plugs are supplied to plug the unused PTR, hot and cold connections.
3. A reducing bush is supplied to enable fitment of the ¾" PTR valve connection to the ½" cylinder connection.
4. 500 kPa PLV is supplied with some models as listed in Table 1. It must be fitted if the Mains Pressure exceeds
the limits shown in Table 1. If the mains pressure is within the limits shown in Table 1 fitment of the PLV is
optional. However, it is recommended that the PLV is fitted in all installations as it aids water and energy
conservation.
5. A cold water Expansion Control Valve (ECV) (not supplied) must be fitted in areas with a 'scaling' water
supply, having a total hardness in excess of 200 mg/litre (expressed as Calcium Carbonate) or Saturation
Index in excess of + 0.4 as detailed under Water Quality, if required. ECVs' must be fitted in South Australia
and Western Australia to comply with local regulations. For pressure setting information refer Table 1.
6. A stop cock and non return valve (not supplied). Combination valves incorporating these functions (such as
'Duo' or 'Trio' valves) are suitable. These are fitted to the cold water supply to the water heater.
7. A temperature limiting device (not supplied), such as a tempering valve if required.
Valves with pressure ratings other than those listed above must not be used.
WARNING
Rinnai Australia
GENERAL INSTALLATION
- 10 - HOTFLO Electric Storage Water Heater Operating/Installation Manual