INSTALLATION
HEATING CONNECTION
The HeatMaster has two connections at the rear that can be used to connect a central heating circuit. Connecting a heating system may reduce the domestic hot water performance.
WARNING
The maximum pump motor load for the MCBA is 250 Watt. If a larger pump is required, install a relay between the pump and the MCBA.
Expansion
HeatMaster 71/101 models are fitted with two 10 litre expansion vessels, which are sized for hot water operation only. If a heating sys- tem is connected to the primary circuit, calculate the expansion capa- city necessary for the total volume of the heating system (Refer to the
technical instructions from a relevant manufacturer of expansion vessels.)
Example of a single circuit connection
1.
2.Heating pump.
3.
4.Isolating valve.
5.Safety valve set to 3 bar with pressure gauge.
6.Expansion vessel.
7.Drain cock.
8.Primary circuit filling valve.
9.Controller.
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WARNING
The pimary safety valve is supplied with a plastic tube connected to the discharge outlet - this is for test purposes only and should be removed. The safety valve should be connected to a drain using a metallic pipe eg. copper.
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