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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. 3-way valve.
2. Heating pump.
3. Non-return valve.
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.
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.
9
INSTALLATION
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4
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6
4
3
5
9
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