© MHG Heating Ltd
13
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email
Web www.mhgheating.co.uk
140116
8.1Hydraulic Design Single Unit (Option 2)
Electrical Connections Single Unit (Option 2)
Terminal
Description
Terminal
Description
N
Permanent Neutral
20
B9 Outside Air Sensor (QAC34)
E
Permanent Earth
21
B9 & B3 Sensor Ground
L
Permanent Live 5Amp
33
H5 Ground
12
QX3/QX1 Neutral
34
H5 Room thermostat VF or 0-10V
13
QX3/QX1Earth
35
CL+ QAA75/78 Room Unit (if used)
14
*QX1 Live Heating Circuit 1 Pump
36
CL- QAA75/78 Room Unit (if used)
37
G+ QAA75/78 Room Unit (if used)
*Max switching capability 0.5 Amps