© MHG Heating Ltd
18
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
8.6Hydraulic Design Single Unit (Option 7)
Electrical Connections Single Unit (Option 7)
Max switching capability 0.5 Amps
Parameter #
Parameters Description
Default
Proposed
Change
6020
Function Extension module 1
Heating Circuit 2
Heating Circuit 1
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
22
B3 DHW sensor / Volt Free Enable
12
QX1 Neutral Heating Circuit 1 Pump
26
BX21 Sensor Ground
13
QX1 Earth Heating Circuit 1 Pump
27
BX21 Flow Sensor Heating Circuit 2
14
*QX1 Live Heating Circuit 1 Pump
33
H5 Ground
15
*QX23 Live Circuit 2 Heating pump
34
H5 Room thermostat VF or 0-10V
16
QX23 Neutral Circuit 2 Heating pump
32
H4 HC2 Room Thermostat VF or 0-10V
17
QX23 Earth Circuit 2 Heating pump
33
H4 Ground
18
*QX22 Live HC2 3 Way Valve Close
35
CL+ QAA75/78 Room Unit (if used)
19
*QX21 Live HC2 3 Way Valve Open
36
CL- QAA75/78 Room Unit (if used)
37
G+ QAA75/78 Room Unit (if used)