Solahart 151J, Руководство пользователя

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INSTALLATION INSTRUCTIONS - ALL MODELS
22
Electrical
ELECTRICAL CONNECTION AND CODES
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, or damage to the heating unit will result.
All electrical work and permanent wiring must be carried out by a qualified person and in accordance with national and
local codes and regulatory authority requirements applicable in your area. In Australia and New Zealand this must be in
accordance with the edition of the Wiring Rules AS/NZS 3000 in force in the state or territory at the time of installation.
If this water heater is installed with an in-series booster, then the electric booster heating unit will not need to be connected
to a power supply and the references to the electric booster heating unit, thermostat and boosting controls in these
installation instructions will not be applicable to the installation.
Note: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in potable
water. This water heater can satisfy this AS 3498 requirement provided, where an in-series booster water heater is not
installed, the electric booster is energised for a sufficient period each day and the electric booster thermostat setting is 60°C
or higher.
If this water heater is installed with an in-series continuous flow gas booster, then this requirement of AS 3498 can be
satisfied provided the booster is energised, its preset outlet temperature setting is 70°C or higher and a remote temperature
controller is not used.
Solar Storage Tank
The solar storage tank with an electric booster heating unit must be directly connected to a 220 V - 240 V a.c. 50 Hz mains
power supply with an isolating switch installed at the switchboard. The Wiring Rules AS/NZS 3000:2018 requires a
second and lockable isolating switch be installed adjacent to but not on or attached to the solar storage tank, and a residual
current device (RCD) installed in the electrical circuit to the water heater.
The power rating and current requirement of the water heater is specified on the rating label, located on the electrical cover
located at the side of the tank. The booster heating unit and the terminal block for the electrical connection is behind the
electrical cover. 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. The temperature rating of the power supply wires insulation must suit this application, or the
wiring protected by insulating sleeving with an appropriate temperature rating if it can make contact with the internal
storage cylinder. The temperature of the internal storage cylinder can reach 95°C during its operation.
The water heater is more suited for the booster heating unit to be connected to either a continuous, or a time of use, or an
extended Off-Peak (overnight and day) electricity supply. A timer can also be used to control the boosting periods and help
maximise solar savings. Refer to
“Booster Control”
on page 23.
The booster heating unit may be connected to an Off-Peak (overnight) electricity supply, however this will only allow the
booster to heat the water overnight. If this type of connection is considered, care must be taken to ensure there is sufficient
boost capacity to meet the household’s full day and night’s hot water supply during periods of no or low solar gain,
particularly in cold weather.
Temperature Redistribution (refer to page 11) is more evident with this type of electricity
supply connection and its implications should be discussed with the householder. Discuss the power supply and hot water
usage requirements with the householder.
If water and / or power are not available on completion of installation, leave the isolation switch in the meter box in the off
position and place a warning label “Do not turn on electricity until the water heater is filled with water and the water heater
has been commissioned” on the electrical isolating switch.
Thermostat Setting
The thermostat is adjustable from 60°C to 70°C. The factory setting of the thermostat is 60°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. It is recommended the thermostat is set at 60°C to maximise solar
contribution. Discuss the thermostat setting requirements with the householder.
The thermostat has a safety cut-out (also called an over-temperature energy cut-out) that will de-energise the element
should the temperature within the tank reach 83°C whist the element is activated. This safety cut-out is not resettable. This
cut-out is of a type that will not activate due to solar heating of the water in the storage tank above this temperature whilst
the element is not energised.