Wiring Diagram - Lochinvar Shield SNR150-100 Installation & Service Manual

13
Diagrams
Figure 13-2 Wiring Diagram
DISPLAY
X3
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: Repl acement 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)
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
INTEGRATED CONTROL
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
CN3 X4
CN4-4
CN4-5
CN4-2
CN4 CN3
HIGH VOLTAGE SPARK LEAD
TM
BOX DEPICTS
OPTIONAL ITEMS
OR
W
W
X1-5
PUMP
RELAY
3
1 2
4
OR
X1-3
BK
BK
X1-6
W
X3-4
G
X1-8
X3-2
X3-1
R
X1-1
X3-3
R W
G
BLOWER
1 2 3
1 2 3 4 5
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
O-TEMP HEX SW
GY
X5-10
BK
X5-8
R
X5-1
W
X5-2
Y
X5-9
BK
X2-2
Y
X2-1
FLAME
W/R
X1-7 ROD
SPARK
TR1
ROD
Installation & Service Manual
WARNING
DISCONNECT POWER
BEFORE SERVICING
JUNCTION
BOX
L
DHW
N
GND
PUMP
L
L
120V
N
GND GND
SUPPLY
N
TERMINAL STRIP
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 C
75