Page 4
5
Connector
Description
HT
SELV
no. of location and type
Pin nr.
Board Silk
CN7
1,8
F.S
Flame Sensor
SELV (5V)
2,9
OP.S
Outlet Operating Water Temperature Sensor
3,10
DH.S
DHW Temperature Sensor
4,11
I.S
Inlet Water Temperature Sensor
5,12
BG.S
Exhaust Water Temperature Sensor
6,13
ST.S
Surface Temperature Sensor
7,14
SP.S
Unused
CN12
1
AGM
AGM Stepper Motor Coil / Y Phase
SELV (24V)
2
3
AGM Stepper Motor Coil / Y Phase
4
5
GND
6
AGM Stepper Motor Position
7
VDD
CN10
1
DHM
(Mixing Valve)
DHM Stepper motor coil /Y phase
SELV (14V)
2
3
DHM Stepper motor coil /X phase
4
5
GND
6
DHM Stepper motor position
7
VDD
8
VDD
CN14
1
IWM
(Flow Control Valve)
GND
SELV (14V)
2
IWM Stepper motor position
3
VDD
4
IWM Stepper motor coil /X phase
5
IWM Stepper motor coil Y phase
6
VDD
7
IWM Stepper motor coil /X phase
8
IWM Stepper motor coil Y phase
9
Unused
CN3
1
Push Button Switch
VCC
SELV (5V)
2
Title 24
3
GND
4
FLUX1
VCC
5
Water Flow Sensor
6
GND
CN5
1
RPM
Fan RPM Sensor
SELV (5V)
2
GND
CN15
1
FLUX2
VCC
2
Recirculation Flow Sensor
3
GND
Summary of Contents for LT Series
Page 42: ...Page 42 4 20 Wiring Diagram...
Page 43: ...Page 43 4 21 Ladder Diagram...
