© MHG Heating Ltd
22
MHG Heating Ltd, Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey, KT20 5LR
0845 6448802 Telephone. 0845 6448803 Fax. Email
Website www.mhgheating.co.uk
010310 Draft
7.0 Electrical Connections
Basic electrical connection for all types of ECOSTAR 500s
Legend
High Voltage Output and Input Terminals 230 Volts
B/ATB
Flue Gas Limit (supplied with link installed
S3
Lockout Output
B4 Burner
Run
Output SK1 Safety
Interlock
BS1
Connector Plug
SK3
Safety Interlock
CL-
QAA Room Unit/Programmer
T1
Burner Enable / Lockout RESET
CL+
QAA Room Unit/Programmer
T2
Burner Enable IN (230V)
G
Display Light Power Supply
W-SB
Burner Connector Plug
L
Unit Power Supply Live
b
QAA Room /Programming Unit
L1
Burner Power Supply
b 1
Main Power Isolator
N
Unit Power Supply Neutral
b 3
Limit Thermostat
N A
Appliance Connector Plug Mains IN
b 4
Flue Gas Limit Thermostat
N-R
Connector Plug
b 5
Lockout Reset Button
OEV
Wiring external to the appliance
b r
Brown
RG
Connector Socket for QAA Room Unit
h 6
Lockout Light (Red)
RS
Appliance Controller RVS 53/63
sw
Black
