Specifications

TM040 16, 18 & 20L Continuous Flow Gas Water Heater Service Instructions
D.O.I: 2/06/2009
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10
In-series Gas Boosting
Temperature controllers must not be fitted if this water heater is installed
as part of a solar water heater system because water at a temperature
much higher than the controller setting can be delivered.
246, 276, 876 series water heaters are not suitable for use as in-series solar
gas boosters.
The 244, 274, 874 series may be installed as an in-series booster water heater to a solar
preheat water heater. In this application the outlet temperature setting of the heater must
be set at 60 C. Refer to page 7 for details on checking and adjusting the outlet
temperature.
When the inlet water temperature is 58°C or higher the fan and burner will not operate
despite water flowing through the heat exchanger. When the inlet water temperature is
less than or equal to 57°C the burner will fire and boost the outlet temperature to 60°C
provided the flow rate is greater than 3 litres per minute.
Note: If an existing 871 series Integrity water heater with a bypass valve is replaced with a
244, 274, 874 series heater, the solar bypass valve must be removed and the plumbing
connections remade directly to the inlet and outlet water connections of the replacement
244, 274, 874 series water heater.
In-series Gas Boosting - Solar Loline Installation
Typical Installation - Solar In-Line Gas Booster
Solar Pumped Open Circuit Systems