Operating instructions

ABOUT YOUR WATER HEATER

WATER HEATER APPLICATION

This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable

water. Its use in an application other than this may shorten its life.

MODEL TYPE

The Rheem

continuous flow gas water heater model you have chosen is for outdoor installation only. This

model has an extended manufacturer’s warranty (refer to the Rheem warranty on page 71).

The water heater has a maximum preset outlet temperature setting of:

• 884 series 75°C

• 886 series 50°C

Notes:

• The 886 series water heater is marked “THIS APPLIANCE DELIVERS WATER NOT EXCEEDING 50°C

IN ACCORDANCE WITH AS 3498” on the front panel. This model;

 must not be installed as an in-series gas booster to a solar water heater, as water temperature

greater than 50°C can be delivered from the water heater contravening its compliance to AS 3498.

 must not be installed with a Water Star water heater as water

temperature greater than 50°C can be delivered from the system.

• The 884 series water heater may be installed as an in-series gas

booster to a solar water heater. For information relating to the function

and operation of the solar water heater, refer to the Owner’s Guide

and Installation Instructions supplied with the solar water heater.

• When installed as an in-series gas booster to a solar water heater, the

884 series water heater:

 can deliver water at temperatures up to 75°C for a Premier Loline

and Loline pumped system and a Hiline thermosiphon system and

possibly higher temperatures from a Premier Hiline thermosiphon

system.

 during periods of low solar energy gain, will boost the water

temperature automatically to its preset outlet temperature setting.

WATER HEATER OPERATION

The water heater operates automatically, heating water as it passes through the water heater. When a hot

tap is opened, the gas burners ignite to provide immediate heating of the water. The heat produced by the

burner is transferred to the water through the heat exchanger. The water is heated to a constant temperature

by the automatic adjustment of the gas supply to the burner to suit the water flow rate (refer to “Temperature

Control” on pages 11 to 30). The gas burners extinguish when the hot tap is closed.

Automatic safety controls are fitted to the water heater to provide safe and efficient operation.

GAS BOOSTING FOR A SOLAR WATER HEATER

Water stored in the solar storage tank passes through the in-series gas booster when a hot tap is opened.

The in-series gas booster is for heating water at times of low solar energy gain, such as during cloudy or

rainy weather, or during colder months.

Solar heated water can reach temperatures up to 75°C for a Premier Loline and Loline pumped system and

a Hiline thermosiphon system and possibly higher for a Premier Hiline thermosiphon system. The in-series

gas booster operates automatically. When the solar heated water temperature is 58°C or higher, the flow

passes through the in-series gas booster without boosting. When the solar heated water temperature is

below 58°C, the in-series gas booster heats the water to its preset outlet temperature setting.