Filter
Top Products
31
CONNECTIONS – ELECTRICAL
The power supply to the water heater must not be switched on until the water heater is filled
with water and a satisfactory megger reading is obtained.
All electrical work and permanent wiring must be carried out by a qualified person and in accordance
with the Wiring Rules AS/NZS 3000 and local authority requirements.
If this water heater is installed as a solar preheater to an in-series water heater, then the booster
heating unit does not need to be connected to a power supply and the references to the booster heating
unit, thermostat and manual controls are not applicable.
SOLAR STORAGE TANK
The solar storage tank with an electric booster heating unit must be directly connected to a
240 V AC 50 Hz mains power supply with an isolating switch installed at the switchboard.
The power supply can be either an
Off-Peak (overnight), an Extended Off-Peak (overnight and day) or
a
continuous electricity supply. An Off-Peak (overnight) power supply will provide the maximum
financial savings. Discuss the power supply requirements with the householder.
A flexible 20 mm conduit is required for the electrical cable to the solar storage tank. The conduit is to
be connected to the unit with a 20 mm terminator. Connect the power supply wires directly to the
terminal block and earth tab connection, ensuring there are no excess wire loops inside the front cover.
THERMOSTAT SETTING
The thermostat is adjustable from 60°C to 70°C. The thermostat is adjusted by turning the adjuster
anticlockwise to decrease the temperature setting and clockwise to increase the temperature setting.
Only adjust the temperature setting when the isolating switch is switched off at the switchboard.
For reasons of safety and economy, we advise the thermostat be set at the lowest temperature that will
provide sufficient hot water during periods when boosting is required. Solahart recommends the
thermostat is set at 60°C to maximise solar contribution. Discuss the thermostat setting requirements
with the householder.
SOLAR CONTROL UNIT
The solar control unit, supplied with a 1.8 metre power cord, requires a switched 240 V AC 50 Hz
general purpose outlet (GPO) to be located within 1.2 metres of the installation. The GPO must have a
continuous power supply originating from a circuit other than the water heater circuit. The GPO is
required to be weatherproof if installed outdoors.
MANUAL CONTROLS
Solahart recommends an additional manual isolating switch be installed in the power supply circuit to
the solar storage tank. This booster switch is to be installed in a convenient location such as the kitchen
or laundry and will enable the householder to control the electrical boosting during periods of poor solar
gain.
A suitably rated single-pole
on / off switch should be used to control a booster heating unit connected to
an Off-Peak electricity supply. A booster heating unit connected to a continuous electricity supply
should be controlled by either a suitably rated single pole on / off switch or
“One Shot Control” switch.
Refer to the manufacturer’s instructions supplied with the switch for installation details. Discuss the
manual switching arrangements with the householder.