Electrical Connections - MHG Heating ProCon 16 Installation And Operating Manual

6.0 Pressure (Safety) Relief Valve
In accordance with the prevailing British Standard 5440/6644, 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
Legend
1
RU
2
3
RT Heating Circuit 1 Volt Free Enable Not Polarity Sensitive (Room stat/BMS) < 24 Volts
4
5
AT
6
7
BW
8
E 9
10 Permanent 230 Volt Output for Motor Open Motor Close Hot Water Diverter Valve
BW/K3 11
12
13 230 Volt Output For Heating Circuit Pump (ProCon 16-27)/Boiler Pump ProCon 47, 75&77)
K2
14
E 15
16
K1
17 230 Volt Output For Boiler Pump (ProCon 16-27)/Heating Circuit Pump ProCon 47,75&77)
E 18
N 19
L 20
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email
© MHG Heating Ltd
Low Voltage Control terminals < 25 Volts
QAA73 Room Unit Not Polarity Sensitive < 24Volts
(Link terminals to activate second heating zone control.)
Outside Air Sensor (QAC34) Not Polarity Sensitive < 24Volts
(Required to Activate Direct on Boiler Weather Compensation)
Hot Water Sensor (QAZ36) or Hot Water Volt Free Enable (Thermostat/BMS).
High Voltage Output and Input Terminals 230 Volts
Neutral Terminal for Hot Water Diverter Valve or Charging Pump
230 Volt Output For Hot Water Diverter Valve or Charging Pump (Max 1Amp)
Neutral Terminal for heating/Boiler Pump
Neutral Terminal for heating/Boiler Pump
Switched Fused Permanent Neutral
Switched Fused Permanent 230 Volt Live (Max 5Amp)
Not Polarity Sensitive < 24Volts
Common Earth Terminal
Common Earth Terminal
Permanent Earth Terminal
info@mhgheating.co.uk
010711
Web www.mhgheating.co.uk
(Max 1Amp)
(Max 1Amp)
18