ABOUT YOUR WATER HEATER
8
CIRCULATED HOT WATER FLOW AND RETURN SYSTEM
A Vulcan 244 627 model continuous flow water heater can be installed as part of a circulated hot water flow
and return system in a building. Refer to
“Circulated Hot Water Flow and Return System”
on page 19 for
further information and notes on this type of installation.
GOING ON HOLIDAYS
If you are going on holidays, it is not necessary to turn the water heater off. If it is necessary to turn off the
water heater, refer to
“To Turn Off The Water Heater”
on page 8.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater:
Switch off the electrical supply at the power outlet to the water heater if there is no risk of freezing
conditions occurring (refer to note below).
Close the gas isolation valve at the inlet to the water heater.
Close the solar preheat water isolation valve at the inlet to the water heater.
Note:
If there is a risk of freezing conditions, the electrical supply to the water heater should not be switched
off unless the water heater is drained, otherwise damage could result (refer to
“Frost Protection”
on page 8
and
“Draining the Water Heater”
on page 9).
TO TURN ON THE WATER HEATER
Screw in the drain plugs at the solar heated water inlet and hot water outlet of the water heater if the
water heater has been drained.
Open all of the hot tap
s in the house (don‟t forget the shower).
Open the cold water isolation valve fully at the inlet to the solar water heater.
Open the solar heated water isolation valve fully at the inlet to the in-series gas booster.
Air will be forced out of the taps.
Close each tap as water flows freely from it.
Open the gas isolation valve fully at the inlet to the water heater.
Plug in the power supply cord at the power outlet.
Switch on the electrical supply at the power outlet to the water heater.
The water heater will operate automatically when you open a hot tap if boosting is required.
FROST PROTECTION
The in-series gas booster has a frost protection system. The frost protection system will protect the in-series
gas booster from damage, by preventing ice forming in the waterways of the in-series gas booster, in the
event of freezing conditions occurring.
Notes:
The frost protection system will be rendered inoperable if electrical power is not available at the water
heater. Damage caused by freezing due to the unavailability of power at the water heater is not covered
by the Vulcan warranty (refer to
“Terms of the Vulcan Warranty”
on page 31).
If it is necessary to switch the power off to the water heater and there is a risk of freezing, then it is
necessary to drain the water heater (refer to
“Draining the Water Heater”
on page 9).
Pipe work to and from the water heater must be adequately insulated to prevent freezing.
The water heater is not suitable for installation in areas where the ambient temperature falls below -20°C
(including wind chill factor).
Refer to
“Terms of the Vulcan Warranty”
on page 31.
