HTP UFT-140W - Page 49

49
LP-542 REV. 6.2.16
CONNECTOR
DESCRIPTION
HT SELV
NO. OF LOCATION
PIN
BOARD SILK
CN9
65001WS-12
1
GROUND
HT (120V~) AC
2
L
Power Supply Line
3
CP1
Boiler Pump Power Supply (Live)
4
IT
Ignitor Power Supply
5
L(HT)
CH / System Pump Power Supply (Live)
6
GV
Gas Valve Power Supply
7
-
8
N
Boiler Pump Power Supply (Neutral)
9-12
N
Power Supply (Neutral)
CN6
LW6A4-03
1
CP2/3WAY
DHW Pump Power Supply (Live)
3
DHW Pump Power Supply (Neutral)
CN1
SMW250-03
1
RS-485
RS485 +
Cascade
Connection
SELV (5V) DC
2
RS485 -
3
-
4
RS485 +
5
RS485 -
CN4
LWD1140-06
1
FAN
NOT USED
-
2
GND
SELV (14V) DC
3
VDD
4
Fan power (start coil)
SELV (8-26VAC)
5
Fan power (end coil)
6
Fan speed feedback signal
SELV (14V) DC
CN8
SMW250-04
1
MCU ISP
GND
SELV (5V) DC
2
ISP / Reset Port
3
ISP TOOL0 Data Port
4
VCC
CN11
LWD1140-16
1
HWL
NOT USED
SELV (12V~) AC
9
2
LWL
Water Level Sensor
10
3
HD
Central Heating Demand (T/T)
SELV (5V) DC
11
4
TH
Connect to the Display Control
SELV (14V) DC
12
5
APS
Flue Air Pressure Switch
13
6
EL
Low Water Cutoff (External)
14
7
BL
Burner High Limit
15
8
HL
Condensate APS
16
Table 20 – Boiler Wiring 1
Figure 40 – Line Voltage Wiring Detail