© MHG Heating Ltd
14
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 01737 358000 Fax 08456 448803 Email
Web www.mhgheating.co.uk
010517
7.3 Hydraulic Design Single Unit (Option 4)
Electrical Connections Single Unit (Option 4)
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Heating Circuit Pump
Output
Q2 Central Heating Pump Max 0.5Amp
230Volts-50Hz
3 Way Valve Open
Output
Additional internal wiring required at
Commissioning
230volts-50Hz
3 Way Valve Close
Output
Additional internal wiring required at
Commissioning
230volts-50Hz
DHW Pump
Output
Q3DHW Storage Pump Max 0.5Amp
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Outside Air Sensor
Input
Outside temperature Sensor. QAC34 sensor
provided
**Room Thermostat
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable
Input
0-10Volt Enable H3
0-10Volts
Mixed Circuit Sensor
Input
Additional internal wiring required at
Commissioning
QAD 36 sensor required
<24 Volts
MHG Pressure Manager
Input
Multifunctional to be configured during
commissioning
<24 Volts
**Only one enable to be used per installation. Volt Free or 0-10.