Installation manual

Rinnai Australia - 11 - HOTFLO Electric Storage Water Heater Operating/Installation Manual
PLUMBING CONNECTIONS
Refer to Figure 1 for the location and specification of each plumbing connection to the water heater.
The water heater has 'dual handed' PTR valve, cold supply and hot outlet connections. The brass plugs (supplied)
are used to plug unused connections.
PTR Valve Connection
The PTR Valve must be fitted before the water heater is operated. Before installation, ascertain that the probe is
straight and undamaged. Seal the thread with Teflon tape - never use hemp.
Make certain the edge of the Teflon tape does not protrude past the end of the thread. Screw the reducing bush
supplied into the fitting on the water heater marked PTR Valve, then screw the PTR valve into the reducing bush.
Leave the valve outlet pointing down. Tighten the valve using the spanner flats - never use the valve body.
Expansion Control Valve (ECV)
The expansion control valve (if used) must always be installed after the non return valve and be the last valve
installed before the water heater (Refer to Figures 2 - 5).
Drain Lines
Copper drain lines (½” or DN15) must be fitted to the PTR valve and ECV (if fitted). The water may drip from the
discharge pipe of the pressure relief device and this must be left open to atmosphere. The length should be as
short as possible on a continuous downward slope with no restrictions and is a frost-free environment. Length
should not exceed 9 metres with no more than three right angle bends. In areas where water pipes are prone to
freezing, drain lines must be insulated and not exceed 300mm in length. In this case the drain line must discharge
into a tundish through an air gap of between 75mm and 150 mm.
The outlet of drain lines must be positioned so that they are readily visible but not cause injury, damage or
nuisance.
ELECTRICAL CONNECTIONS
Models: HFE25S / HFE50S have foam caps supplied. These MUST be used to cover up these
brass plugs to prevent heat losses.
The water heater must be filled with water prior to connection to the power supply.
Disconnect all power prior to installation and commissioning. This appliance is designed for
single phase 240 Volts, AC mains electrical operation. All electrical connections must be made
by an authorised person and must comply with all local electrical supply regulations and
AS/NZS 3000.
s
The household wiring to the heater must be capable of withstanding the appliance load.
Electrical access is via a 20 mm hole beneath the element cover for mounting with an approved weatherproof
electrical conduit nipple. For entry to the element cover remove the two fixing screws. Connect all ACTIVE and
NEUTRAL wires in accordance with the wiring diagram which is also included at the rear of the element access
cover. Ensure the incoming EARTH wire is securely fixed to the earth post provided on the heater case. Inspect
and ensure that all wiring links are secure prior to fixing the access cover and turning the POWER ON.
To ensure the Over-temperature and Energy Cutout is set, press the (red) 'reset' button on the Thermostat.
NOTE
CAUTION
WARNING
NOTE
GENERAL INSTALLATION