Wiring Diagram - Lochinvar Shield SNR200-100 Installation And Service Manual

14
Diagrams
Figure 14-2 Wiring Diagram
DISPLAY
PC
INTERFACE
EXTERNAL
LIMITS
ALARM
CONTACTS
RUN-TIME
CONTACTS
24 VAC
LOW
WATER
CUT-OFF
COM
GAS
PRESSURE
SWITCH
S4
TANK
SENSOR
+
EXTERNAL
0-10V
CONTROL
-
CAUTION
Notes:
1. All wiring must be installed in accordance with: local, state, provincial and national code requirements per either N.E.C. in USA or C.S.A. in Canada.
2. If any original equipment wire as supplied with the appliance must be replaced, it must be replaced with wire having same wire gauge (AWG) and rated for a
minimum of 105°C. Exceptions: Replacement high voltage spark lead and ribbon cables must be purchased from the factory. Use of a non-approved spark lead
or ribbon cables can lead to operational problems which could result in non-repairable damage to the integrated controller or other components.
3. Actual connector block locations may vary from those shown on diagrams. Refer to actual components for proper connector block locations when using
diagrams to troubleshoot unit.
(continued)
INTEGRATED CONTROL
X3
X8
CONNECTION BOARD
CN2
CN1
OR
CN2-9 X6-10
1
BK
CN2-3
X6-5
2
PR
CN2-7
5
PR
CN2-1
6
R
CN2-8
3
R
CN2-2
4
CN5
BL
CN5-1 X6-2
CN2-6
GY
X6-7
CN5-3 CN2-12
BR
CN5-4
CN2-11
X6-9
Y
CN5-2
CN2-4 X6-3
Y
CN2-10
X6-8
CN4-3
P
CN4-6 CN2-5 X6-4
CN4-1
X4
CN4-4 CN3
CN4-5
CN4-2
CN3
CN4
HIGH VOLTAGE SPARK LEAD
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
W
X1-5
PUMP
RELAY
1
OR
X1-3
BK
X1-6
X3-4
G
X1-8
X3-2
X3-1
R
X1-1
X3-3
BLOWER
1 2 3
R
X5-5
T
X5-13
W
X5-6
BK
X5-12
BL
X5-7
PR
X5-14
OR/BK
X5-11
P
X5-3
OR
X5-4
GY
X5-10
BK
X5-8
R
X5-1
W
X5-2
Y
X5-9
BK
X2-2
Y
X2-1
FLAME
W/R
ROD
X1-7
SPARK
TR1
ROD
Installation & Service Manual
TM
WARNING
DISCONNECT POWER
BEFORE SERVICING
JUNCTION
BOX DEPICTS
BOX
OPTIONAL ITEMS
OR
L
N
GND
W
3
2
4
L
BK
L
N
GND GND
W
N
TERMINAL STRIP
R W G
1 2 3
4 5
BL
MANUAL RESET
PR
HI-LIMIT
OR/BK
AIR PRESSURE
OR
SWITCH
OR
BLOCKED
P
DRAIN
OR
AUTO RESET
GY
HI-LIMIT
S2
INLET
SENSOR
S1
OUTLET
SENSOR
S3
FLUE
SENSOR
GAS
VALVE
G

WIRING DIAGRAM

LBL20025 REV A
DHW
PUMP
120V
SUPPLY
71