Lochinvar ARMOR 151 - Manual (Page 72)

Installation & Operation Manual
13
Diagrams
Figure 13-1 Ladder Diagram
BOX DEPICTS
OPTIONAL ITEMS
LADDER DIAGRAM
LBL20149 REV B
120 VAC
24 VAC
120VAC
TERMINAL STRIP
120V SUPPLY "L"
ON / OFF
SWITCH
X1-6 F2
NEUTRAL
FLOW
CN5-12
CN5-11
X4-10
X4-11
INTEGRATED
CONTROL
LOW GAS
PRESSURE
SWITCH
HIGH GAS
PRESSURE
SWITCH
LOUVER
RELAY COIL
24VAC
LOUVER
PROVING SWITCH
CN5-4 X4-4
BLOCKED
DRAIN SWITCH
X5-2
X5-11
X5-10
X2-1
GAS VALVE
GAS VALVE
RELAY
X5-7
X5-16
X5-8
X5-15
1
2
4
5
3.15A
F1
5A
TR2
X1-7
FLAME ROD
SPARK
ROD
INTEGRATED CONTROL
GROUND JUNCTION BOX
BLOWER
CONNECTION
BOARD
INLET
SENSOR
OPERATING SENSOR
FLUE
SENSOR
INTEGRATED
CONTROL
RUN-TIME
CONTACTS
RIBBON CABLE
X7
TANK
SENSOR
0-10V
+
-
CASCADE
A
B
SHIELD
SHIELD
13
6
2
1
SIL
E N
C
IN
G
SW
ITCH
ALA
R
M
BEL
L
S4
BMS
CN3-9 X4-9
CN3-6 X4-6
CN6 X6
CN6 X6
CN5-2 X4-6
CN5-9 X4-13
CN5-1 X4-7
CN5-8 X4-14
CN6 X6
CN6 X6
CN6 X6
HIGH LIMIT SENSOR
FLUE
SENSOR
X5-4
X5-12
X5-5
X5-13
X5-14
X5-6
0-10V
+
-
RATE
OUT
IN
MODBUS
A
B
SHIELD
SHIELD
CN6 X6
CN8-1 X6-1
CN8-2 X6-2
CN8-3 X6-3
X4-1 X9-2
X4-2 X9-1
X4-3 X9-3
PC INTERFACE
S2
S1a
S1b
S3a
S3b
16
17
19
20
21
22
23
24
25
26
27
28
29
30
3
4
1
2
ALARM
CONTACTS
CN6 X6
M
O
D
B
U
S
10
14
9
5
6
7
8
X2-2
NOTES:
1. Where possible, switches are shown without utilities (gas, water or
electricity) connected to the unit. As such, actual switch states may
vary from those shown on diagrams depending upon whether utilities
are connected or a fault condition is present.
2. See wiring diagram for additional notes.
AIR PRESSURE
SWITCH
CN5-3 X4-5
X1-1
1 2
BLOWER
BUILDING
RECIRC PUMP
RELAY
DHW PUMP
RELAY
24V DC
SUPPLY
F3
.8A
X5-1 X5-9
3.5A
AW 801 ONLY
3
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
LWCO
CONNECTION BOARD
TANK
THERMOSTAT
11 12 SWITCH CN7-1
CN7-3 CN7-2
CN7-4
CN5-10 X4-12
CN5-14 X4-8
CN5-5
X4-3
CONNECTION BOARD
X1-3
X1-2
DHW
PUMP "L"
SYSTEM
PUMP "L"
DHW
PUMP
BUILDING
RECIRC
PUMP
DHW
PUMP "N"
SYSTEM
PUMP "N"
TERMINAL
STRIP
TERMINAL
STRIP
GND
GND
TERMINAL STRIP
120V SUPPLY "N"
13
HIGH VOLTAGE SPARK LEAD CAUTION
72