Wiring; Internal Wiring Combustion Manager - Keston HEAT 2 45 Installation & Servicing

4.

WIRING

Evomax 2 Schematic Diagram Rev. 1.8

4.1 INTERNAL WIRING COMBUSTION MANAGER

(To be updated at next revision)
FS
2
1
PCB
PELV PWM
Internal
pump connection
Boiler
Pump
Boiler
Run
C NO C NO
I6
1 2 3
To internal
boiler pump
CH2/DHW/
CH1/Boiler
Shunt Valve/
System
Pump
C NO PE C NO PE
I5
1 2 3 4 5 6
Chassis PE
GV
8 7 6 5
4 3 2 1
Chassis PE
IGN
1 2 3
Chassis PE
To internal
boiler pump
230V 50Hz
Mains Supply
Auxiliary
L N PE
L N
I4 I1
1 2 1 2 3
CH/CH2
Chassis PE
DHW Demand
SL1 L SL2 L
I2
1 2 3 4
Installation & Servicing
SECTION 4 - WIRING
3 ION Analogue
2 ION PE
1 ION Digital
Boiler
Fault
4
5 Lockout COM
4 Lockout NO
3
2 Burner ON COM
1 Burner ON NO
5 Pump DHW COM
4 Pump DHW NO
3
2 Pump CH COM
1 Pump CH NO
8 Valve AC N2
7 Valve AC N1
6 Valve DC+
5 Valve DC-
4 Valve AC L2
3 Valve AC L1
2 IGN Neutral
1 IGN Live
5 Mains Aux Live
4 Mains Neutral
3 Mains Live
DHW SWL
2
1 CH SWL
DP
View from rear
CC TX 1
CC RX 2
CC 5V 3
CC GND 4
CC 24V 5
Varican TTL lead
To SM X1
CAN VCCon 1
OpenTherm
0-10V 1
CAN Mode 2
CAN Tx 3
CAN Rx 4
10V OT1+ OT2+
I9 GND OT1-
CAN 5V 5
CAN GND 6
CAN 24V 7
1 2 3 4 5
OT- 1
OT+ 2
0-10V - 3 OpenTherm lead
To SM X2
0-10V + 4
Header - 1
Header + 2
Room - 3
Room + 4
OWC - 5
OWC + 6
DHW GND
7
DHW + 8
Flow Ret H/X
Flue - 1
1 2 1 2
Flue + 2
Flow - 3
Flow + 4
Return - 5
Return + 6
Heat Ex - 7
Heat Ex + 8
1
P PWM 1
2
3
P GND 2
P 0-10V 3
F PWM 4
F GND 5
F FB 6
Turbine Signal 1
WPSa
Turbine GND 2
Turbine 5V 3
WPSb
WPS Signal 4
WPS GND 5
WPS 5V 6
S Interlock b 1
APS b 2
3
2
S Interlock a 4 1
5 SIa SIb
APS a 6
Header Tank Room Outside
2 Sensor Sensor Sensor Sensor
S GND S GND S GND S GND
OT2- I10
1 2 3 4 5 6 7 8
6
*Option
Pump control
Kit
1 2
PWM GND 10V
I8
To internal boiler pump
PCB
FC
PCa
5 4 3 2 1
PELV *Option
Interlock
Kit
I0 I1
I7
2
1
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