INSTALLATION
HOT WATER CONNECTIONS
Pressure reducing valve
If the mains water pressure is greater than 6 bar, a pressure reducing valve must be fitted.
Expansion relief valve
The tank expansion relief valve must be ACV approved and calibrated to a maximum of 7 bar. The valve discharge must be connected to the drain.
Hot water expansion vessel
A hot water expansion vessel must be installed.
Hot water circulation
If the tank is situated a long way from the point of use, then installing a recirculation loop can provide a faster supply of hot water to the outlets.
Temperature and pressure relief valve
If using the HeatMaster as an unvented hot water unit, in some coun- tries, a temperature and pressure relief valve must be fitted - consult your ACV stockist for assistance.
Example of hot water connection with thermostatic mixer
1.Stop cock
2.
3.Pressure reducing valve
4.Expansion relief valve
5.Hot water expansion vessel
6.Hot water secondary pump (it fitted)
7.Thermostatic mixing valve
8.Drawoff tap
9.Drain cock
10.Stop cock for cleaning
11.Temperature relief valve
Example of parallel connection
Recommended for applications with a high continuous flow.
Example of series connection
Preferable for high temperature applications with up to three units.
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1 2
4 
2 6
8
7 
10
11
5
Example of heating + storage connection
Recommended for applications requiring a high peak flow.
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DANGER!
As a safety measure against scalding, we strongly recommend installing a thermostatic mixing valve.
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