Lochinvar Shield SNA285-125 - Manual (Page 71)

71
14
Diagrams
(continued)
DISPLAY
X1-8
X5-5
X5-13
X5-6
X5-12
INTEGRATED CONTROL
BLOWER
X1-1
X2-2
X2-1
X1-7
GAS
VALVE
FLAME
ROD
SPARK
ROD
W/R
G
R
R
T
W
BK
G R
1 3 2
W
G
BOX DEPICTS
OPTIONAL ITEMS
WIRING DIAGRAM
LBL20025 REV A
WARNING
DISCONNECT POWER
BEFORE SERVICING
INLET
SENSOR
OUTLET
SENSOR
FLUE
SENSOR
MANUAL RESET
HI-LIMIT
BLOCKED
DRAIN
X5-8
X5-1
X5-2
X5-9
X5-7
X5-14
X5-11
X5-3
X5-4
X5-10
BK
R
W
Y
BL
PR
OR/BK
P
OR
GY
BL
PR
OR
P
OR
GY
1 2 4 5 3
TANK
SENSOR
0-10V
+
-
CONNECTION BOARD
CN3 X4
X1-3
X1-5
X1-6 120V
SUPPLY
DHW
PUMP
JUNCTION
BOX
TERMINAL STRIP
OR
W
BK
OR
W
BK
W
L
N
L
GND
N
BK
Y
EXTERNAL
LIMITS
LOW
WATER
CUT-OFF
CN5-1
CN2-11
CN2-4
CN2-3
X6-9
X6-3
X6-5
BR
Y
BK
CN2-8
CN2-2
CN2-7
CN2-1
ALARM
CONTACTS
RUN-TIME
CONTACTS
X3-1
X3-3
X3-4
X3-2
R
R
PR
PR
EXTERNAL
CONTROL
AUTO RESET
HI-LIMIT
CAUTION HIGH VOLTAGE SPARK LEAD
CN5-3
CN5-4
CN5-2
24 VAC
COM
L
N
GND
GND
TR1
X8
120 VAC
LOW VOLTAGE
HIGH VOLTAGE
X3
PC
INTERFACE
CN2-6
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.
4
3
6
5
2
1
CN1
CN5
CN2
CN3
S4
S2
S1
S3
AIR PRESSURE
SWITCH
OR/BK
OR
PUMP
RELAY
CN2-9
OR
X6-10
CN2-12 X6-7
X6-2
GAS
PRESSURE
SWITCH
CN4-3
CN4-6
CN4-1
CN4-4
CN4-5
CN4-2
CN4
CN2-10 X6-8
Y
CN2-5 X6-4
P
BL
GY
1 2
3
4
Figure 14-2 Wiring Diagram
Installation & Service Manual TM