Rheem GAS BOOSTED SOLAR WATER HEATER Service Manual download pdf (Page 59)

COMMISSIONING

PRESET OUTLET TEMPERATURE SETTING

Note: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in

potable water. This water heater has an in-series gas booster which can satisfy this AS 3498 requirement

provided the gas booster is energised, the booster preset outlet temperature setting is 70°C or higher and a

remote temperature controller is not used.

It will be necessary to check and if required to adjust the preset outlet temperature setting of the in-series

gas booster. Refer to the “Preset Outlet Temperature Setting” section of the Installation Instructions and

Owner‟s Guide supplied with the in-series gas booster.

GAS INLET PRESSURE

IMPORTANT - CHECK the gas supply pressure at the inlet to the water heater with the water heater and all

other gas burning appliances in the premises operating (burners alight). The minimum gas supply pressure

is:

Natural Gas 1.13 kPa Propane 2.75 kPa

If this minimum cannot be achieved, it may indicate the meter or the gas line to the water heater is

undersized. It is important to ensure that an adequate gas supply pressure is available to the water heater

when other gas burning appliances, on the same gas supply, are operating.

It is necessary to remove the pipe cover from underneath the gas booster, by undoing the retaining screws,

in order to test the gas pressure at the inlet of the gas booster. Refit the pipe cover at the completion of the

installation.

Refer to the “Gas Inlet Test Point Pressure” section of the Installation Instructions and Owner‟s Guide

supplied with the gas booster.

BURNER GAS PRESSURE

It is necessary to check the burner gas pressure at both the minimum and maximum operational settings. It

is necessary to have the electrical supply to the water heater switched on, the hot water must be flowing and

the burners on to check and if necessary adjust the operational gas pressures.

Warning: The removal of the front cover will expose 240 volt wiring. Take care not to touch wiring

terminals.

Refer to the “Minimum Test Point Gas Pressure” and “Maximum Test Point Gas Pressure” sections of the

Installation Instructions and Owner‟s Guide supplied with the gas booster.

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 outlets to the solar storage tank and gas booster (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.

Drain the gas booster if there is a risk of freezing conditions occurring (refer to “Draining The Water

Heater” on page 60).

Notes:

The frost protection system of the gas booster 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 gas booster is not covered by the

Rheem warranty (refer to “Terms of the Rheem Warranty” on page 63).

If the power has been switched off to the gas booster and there is a risk of freezing, then it is necessary

to drain the gas booster (refer to “Draining the Water Heater” on page 60).

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Rheem GAS BOOSTED SOLAR WATER HEATER Service Manual Page 59

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