HTP UFT-140W - Page 50

50
LP-542 REV. 6.2.16
CONNECTOR
DESCRIPTION
HT SELV
NO. OF LOCATION
PIN
BOARD SILK
CN7
LWD1140-14
1
F.S
Flame Detect Sensor
SELV (5V)
8
2
OP.S
Supply Operating Water Temperature Sensor
9
3
DH.S
Exhaust Temperature Sensor
10
4
I.S
Return Water Temperature Sensor
11
5
BG.S
External DHW Temperature Sensor / Aquastat
12
6
ST.S
External System Temperature Sensor
13
7
SP.S
Over-Heat Temperature Sensor
14
CN14
SMW250-09
1-9
IWM
NOT USED
SELV (5V)
CN3
SMW250-06
1-6
FLUX1
NOT USED
CN5
SMW250-10
1
RPM
Fan RPM Check
2
GND
Table 21 – Boiler Wiring 2
Figure 41 – Low Voltage Wiring Detail