PART 2 - SECTION I - INSTALLATION INSTRUCTIONS
PUMP SELECTION
The filtration pump must be sized to provide an adequate water flow for the filtration system and the heater. In some cases however, this can cause a high back pressure which reduces the filtration capacity and in this case it would be more of on advantage to install an additional pump for the heater only. This pump must be installed on the inlet side.
DO NOT connect the pump to the heater outlet.
Some heater models incorporate their own ByPass Pump but this is used to control the temperature of the water entering the heater to prevent condensation and scale and will not be suitable as the additional pump described above.
Refer to the Flow Rate chart following when sizing the pump.
Where the water flow rate exceeds the maximum shown in the chart, a by pass valve must be installed to reduce the water flow through the heater.
A pump run on timer must be fitted to remove any residual heat from the boiler and prevent any nuisance tripping of the high limit switch.
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