Specifications

4
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 Aquamax
®
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 Aquamax warranty on page 59).
The water heater has a maximum preset outlet temperature setting of:
CG20-60 series 70°C
CG20-50 series 48°C
Notes:
The CG20-50 model water heaters are marked “THIS APPLIANCE DELIVERS WATER NOT
EXCEEDING 50°C IN ACCORDANCE WITH AS 3498” on the front panel. These models;
 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.
The CG20-60 model water heaters 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
CG20-60 model water heaters:
 can deliver water at temperatures up to 70°C to 80°C with an
Aquamax pumped direct solar 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 21). 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 70°C to 80°C for an Aquamax pumped direct solar 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.