Install Instructions

Mascot ST Tankless Water Heater
Page 39
Connector
Description HT SELV
#, Location, Type PIN Label
CN7
LWD1140-14
1
F.S Flame Detect Sensor SELV (5VDC)
8
2
OP.S Operation water temperature sensor SELV (5VDC)
9
3
DH.S DHW temperature sensor SELV (5VDC)
10
4
I.S
Inlet water temperature sensor SELV (5VDC)
11
5
BG.S Exhaust temperature sensor SELV (5VDC)
12
6
ST.S Not Used -
13
7
SP.S Not Used -
14
CN12
SMW250-07
1
AGM
AGM Stepper motor coil /Y phase SELV (24VDC)
2 AGM Stepper motor coil Y phase SELV (24VDC)
3 AGM Stepper motor coil /X phase SELV (24VDC)
4 AGM Stepper motor coil X phase SELV (24VDC)
5 GND SELV (24VDC)
6 AGM Stepper motor position SELV (14VDC)
7 VDD SELV (24VDC)
CN10
SMW250-08
1
DHM
DHM Stepper motor coil /Y phase SELV (14VDC)
2 DHM Stepper motor coil Y phase SELV (14VDC)
3 DHM Stepper motor coil /X phase SELV (14VDC)
4 DHM Stepper motor coil X phase SELV (14VDC)
5 GND SELV (14VDC)
6 DHM Stepper motor position SELV (14VDC)
7 Not Used SELV (14VDC)
8 VDD SELV (14VDC)
CN14
SMW250-09
1
IWM
GND SELV (14VDC)
2 IWM Stepper motor position SELV (14VDC)
3 VDD SELV (14VDC)
4 IWM Stepper motor coil X phase SELV (14VDC)
5 IWM Stepper motor coil Y phase SELV (14VDC)
6 VDD SELV (14VDC)
7 IWM Stepper motor coil /X phase SELV (14VDC)
8 IWM power IWM Stepper motor coil /Y phase SELV (14VDC)
9 Not Used -
CN3
SMW250-06
1
WPS
Not Used SELV (5VDC)
2 Not Used SELV (5VDC)
3 Not Used SELV (5VDC)
4
FLUX1
VCC SELV (5VDC)
5 Water Flow Sensor SELV (5VDC)
6 GND SELV (5VDC)
CN5
SMW250-10
1
RPM
FAN RPM Check SELV (5VDC)
2 GND SELV (5VDC)