Use and Care Manual

TANKLESS WATER HEATER
Table 19 – Water Heater Wiring 1
48
CONNECTOR
DESCRIPTION HT SELV
NO. OF LOCATION
PIN BOARD SILK
CN9
65001WS-12
1 - UNUSED -
2 L Power Supply Line
HT (120V~)
3 CP1 UNUSED
4 IT Ignitor
5 L(HT) Ceramic Heater (Freeze Protection)
6 GV Gas Valve
7 EARTH GROUND
8 N Power Supply Neutral
9-12 N AC Power COM Line
CN1
SMW250-03
1
RS-485
RS485 +
SELV (5V)
2 GND
3 RS485 -
CN4
LWD1140-06
1
FAN
Unused -
2 GND SELV (30V)
3 VDD SELV (14V)
4 Fan power (start coil)
SELV (30V)
5 Fan power (end coil)
6 Fan speed feedback signal SELV (14V)
CN8
SMW250-04
1
MCU ISP
GND
SELV (5V)
2 ISP / Reset Port
3 ISP TOOL0 Data Port
4 VCC
CN11
1
HWL Unused
-
8
8
LWL Unused
10
3
HD Unused
11
4
TH
Connect to the Display Control
(Thermostat)
SELV (14V)
12
5
Condensate APS Condensate Air Pressure Switch
13
6
Jumper Jumper
14
7
BL Burner Limit
15
8
HL Water High Limit
16