Specifications

48
COMMISSIONING
TO FILL AND TURN ON THE WATER HEATER
The power supply to the solar control unit must not be switched on until the water heater is filled
with water.
Open all of the hot water taps in the house (don‟t forget the shower).
Open the cold water isolation valve fully on the cold water line to the water heater.
Air will be forced out of the taps.
Close each tap as water flows freely from it.
Check the pipe work for leaks.
Bleed the solar collector(s) (refer to “Bleeding the Solar Collector(s)” on page 49).
Plug in the solar control unit at the power outlet and switch on the electrical supply.
The power outlet must be switched on for the solar control unit to operate and solar gain to be achieved
and for the anti-freeze heating unit to operate and offer additional freeze protection.
Refer to “Solar Controller Operation at Start-Up” on page 50.
Note: The solar control unit automatically controls the flow rate through the collector circuit. This is
achieved via the hot and cold sensors and differential controller programming providing control over the
operation of the circulator. There is no provision for nor is adjustment to the solar control unit required.
Remove the packaging / covers from the solar collector(s).
Explain to the householder or a responsible officer the functions and operation of the solar water heater.
Upon completion of the installation and commissioning of the water heater, leave this guide with the
householder or a responsible officer.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation, such as on a building site or
where the premises is vacant, then:
Switch off the electrical supply at the power outlet to the solar control unit (refer to note below).
Close the cold water isolation valve at the inlet to the water heater.
Refer to the Owner‟s Guide and Installation Instructions supplied with the in-series water heater for the
procedure to turn off the in-series water heater.
Notes:
The freeze protection system will be rendered inoperable if electrical power is not available at the solar
control unit. Damage caused by freezing due to no power at the solar control unit is not covered by the
Vulcan warranty.
If there is a risk of freezing, then it is necessary to drain the solar collector(s) and solar flow and return
pipe work (refer to “Draining the Solar Collector(s)” on page 52).
Refer to “Terms of the Vulcan Warranty” on page 55.