© MHG Heating Ltd
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MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email
info@mhgheating.co.uk
Web www.mhgheating.co.uk
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8.4Hydraulic Design Single Unit (Option 5)
Electrical Connections Single Unit (Option 5)
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
QX1 Neutral Circuit 1 Heating Pump
34
H5 Room thermostat VF or 0-10V
13
QX1 Earth Circuit 1 Heating Pump
35
CL+ QAA75/78 Room Unit (if used)
14
*QX1 Live Circuit 1 Heating Pump
36
CL- QAA75/78 Room Unit (if used)
37
G+ QAA75/78 Room Unit (if used)
*Max switching capability 0.5 Amps