Pressure Relief Valve; Electrical Connections - MHG Heating ProCon HT 150 Installation And Operating Manual

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6.0 Pressure (Safety) Relief Valve (Integral within the HTP)
In accordance with BS 6644: 2005, the installer shall install as suitably sized Pressure
(Safety) Relief Valve.
The location of this valve is important with respect to the applied pressure of the
boiler circulation pump, it is therefore recommended to locate the Pressure (Safety)
Relief Valve on the flow pipe immediately adjacent to the boiler; furthermore, there
must not be any means of isolation between the boiler and the Pressure (Safety)
Relief Valve.

7.0 Electrical Connections

Basic electrical connection for all types of ProCon HT/HTP
External Flow and return sensors (QAD36) are required for Cascade Manager Units
only. The sensors must be wired to the RL and VL terminals shown above.
(If internal sensors are in place please disconnect and install the remote sensors.)
Module Controller Mounted Safety Interlock Terminals (X10:03) (Low Voltage<25V)
If required each module can be connected to an external safety device. A relay must
be used to ensure separation of the voltages generated by each module controller.
(X10:03)
AVS75 Extension Module Mixing Clip Wiring Connections.
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