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© 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
Web www.mhgheating.co.uk
140116
8.0 Hydraulic Design Single Unit (Option 1) (New Installations only)
Electrical Connections Single Unit (Option 1)
Terminal
Description
N
Permanent Neutral
E
Permanent Earth
L
Permanent Live 5Amp
20
B9 Outside Air Sensor (QAC34)
21
B9 & B3 Sensor Ground
33
H5 Ground
34
H5 Room thermostat VF or 0-10V
35
CL+ QAA75/78 Room Unit (if used)
36
CL- QAA75/78 Room Unit (if used)
37
G+ QAA75/78 Room Unit (if used)