ABOUT YOUR WATER HEATER
12
REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD
At a cold start-up, i.e. when the gas booster has not operated for some time (which is most often first thing in
the morning), the initial flow of hot water may be reduced for a period of 5-10 seconds while the heat exchanger
warms up.
This is both an energy and water saving feature of this water heater.
Once the heat exchanger
has warmed up the hot water flow will increase and remain at normal flow levels. This feature will only occur
at a cold start-up and not when the heat exchanger is already warm from a recent use of hot water.
TO TURN OFF THE WATER HEATER
If you plan to be away from home for a few nights, we suggest you leave the water heater switched on.
If it is necessary to turn off the water heater:
Switch off the electrical supply at the power outlets to the solar storage tank and gas booster 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 cold water isolation valve at the inlet to the water heater.
Notes
The in-series gas booster frost protection system will be rendered inoperable if electrical power is not
available at the gas booster. Damage caused by freezing due to the unavailability of power at the in-series
gas booster is not covered by the Rheem warranty (refer to
on page 4).
If it is necessary to switch the power off to the in-series gas booster and there is a risk of freezing, then it
is necessary to drain the gas booster (refer to
“Draining the Gas Booster Water Heater”
on page 14).
TO TURN ON THE WATER HEATER
Screw in the drain plugs at the cold water inlet and hot water outlet of the gas booster if the gas booster
has been drained.
Open the cold water isolation valve fully at the inlet to the water heater.
Open all of the hot water taps in the house (don’t forget the shower).
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 solar storage tank and gas booster at their power outlets and switch on the electrical supply.
The power outlets must be switched on for the solar controls to operate and solar gain to be achieved and
for the gas booster to operate.
The gas booster will operate automatically when you open a hot tap, if boosting is required.
PRECAUTIONS
The water heater must be maintained in accordance with the Owner’s Guide and Installation Instructions. Refer
to
on page 15 and to
“Anode Inspection and Replacement”
on page 18.
If this water heater is to be used where an uninterrupted hot water supply is necessary for your application or
business you should ensure that you have back-up redundancy within the hot water system design. This should
ensure the continuity of hot water supply in the event that this water heater were to become inoperable for any
reason. We recommend you seek advice from a plumber or specifier about your needs and building back-up
redundancy into your hot water supply system.
