© MHG Heating Ltd
32
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
010711
8.12 Separately Housed RVS43 Cascade Manager
Terminal Designation
Tag Voltage
Description/Operation/Function
H1
<25V
0-10 Volt Input via BMS/Volt Free Enable via Room Thermostat/BMS
(M terminal used to create circuit)
B70
/B4
<25V
System Return Sensor (QAD36)
(To be positioned on boiler side of system Low Loss Header)
B3
<25V
Hot Water Sensor (QAZ36)/Volt Free Enable via Calorifier Thermostat/BMS
(Parameter alteration required if Volt Free Enable Used)
M
<25V
Ground Connection for all Sensors/Inputs
B10
<25V
System Flow Sensor (QAD36)
(
To be positioned on system side of system Low Loss Header)
B9
<25V Outside
Air
Sensor
(QAC34) or (3000
Ω
Substitute Resistor = -1
0
C)
(Mounted on North Facing Wall)
MD
<25V
QAA75/78 Room Unit (BSB Ground)
A6
<25V
QAA75/78 Room Unit (BSB Data)
MB
<25V
Boiler Communication
(LPB Ground connected in parallel to boiler mounted OCI420 Clips)
DB
<25V
Boiler Communication
(LPB Data connected in parallel to boiler mounted OCI420 Clips))
Q3
230V
Hot Water Charging Pump/3 Way Valve Output
(Max 2 Amp)
Q1
230V Heating
Pump
Output
(Max 2 Amp)
F1
230V
Power Input for Heating and Hot Water Pump Outputs
(To be linked to Live Input)
L
230V Permanent
Live
(Max 6 Amp)
N
230V Permanent
Neutral