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Westinghouse WBRCNG140F Installation Manual Page 38
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Table of contents
TROUBLESHOOTING
BOOKMARKS
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38
W
HL-015 REV. 12.
17
.14
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
Pump 1: Central Heating Pump
4
IT
Ignitor
5
L(HT)
Pump 2: Recirculation Pump
6
GV
Gas Valve
7
-
-
8
N
Power Supply Neutral
9-
12
AC Power COM Line
CN6
LW6A4-
03
1
CP2/3WAY
NOT USED
3
CN1
SMW250-
05
1
RS
-
485
RS485 +
SELV (5V) DC
2
RS485 -
3
GND
-
4
RS485 +
SELV (5V) DC
5
RS485 -
CN4
LWD1140-
06
1
FAN
Unused
-
2
GND
SELV (14
V)
DC
3
VDD
SELV (14V) DC
4
Fan power (start coil)
SELV (8~26.5V) AC
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
H
W
L
Not Used
SELV (12V~) AC
8
2
LWL
Low
W
ater Level Leakage Sensor
10
3
HD
Central Heating Demand
SELV (5V)
DC
11
4
TH
Connect to the Display Control
(Thermostat)
SELV (14V) DC
12
5
APS
Air Pressure Switch
13
6
EL
Not Used
14
7
BL
Burner Limit
15
8
HL
Condensate Block
16
Table
18
–
Appliance Wiring 1
1
2
...
33
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39
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42
43
...
72
73
Gas Fired
1
Residential
1
Combi Boiler
1
FOREWORD
4
FOR THE INSTALLER
4
TABLE OF CONTENTS
4
PART 2 – SAFETY REGULATIONS
8
B. IMPROPER COMBUSTION
9
E. WATER QUALITY
10
F. FREEZE PROTECTION
10
A. UNCRATING THE APPLIANCE
13
C. LEVELING
15
PART 5 – VENTING
18
B. APPROVED VENT MATERIALS
20
E. VENT TERMINATION
22
SAFETY INSTRUCTIONS
23
PART 7 – GAS PIPING
25
PART 8 – WATER PIPING
27
B. DHW PIPING
28
D. CIRCULATOR SIZING
32
E. PRESSURE RELIEF VALVE
33
B. WIRING INFORMATION
34
C. DIP SWITCHES
35
Figure 25 – Ladder Diagram
37
A. CONTROL PANEL
40
B. LCD DISPLAY DESCRIPTIONS
40
C. START-UP SEQUENCE
40
F. CHANGING THE CH SET-POINT
41
G. STORAGE MODE
42
H. STATUS DISPLAY MODE
42
I. INSTALLER MODE
43
J. ERROR MODE
45
K. ERROR TREE ANALYSIS
48
M. 0-10 VOLT INPUT
50
B. CHECK FOR GAS LEAKS
51
WHAT TO DO IF YOU SMELL GAS
52
E. PURGE AIR FROM DHW SYSTEM
53
G. CONDENSATE REMOVAL
54
PART 13 – TROUBLESHOOTING
57
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