Diagrams; Ladder Diagram - Lochinvar 151 - 801 Operation Manual

10

Diagrams

Figure 10-1 Ladder Diagram
120VAC
PC INTERFACE
SENSOR
CASCADE
MODBUS
Outdoor Armor Water Heater
JUNCTION BOX
TERMINAL STRIP
120V SUPPLY "L"
AW MODELS ONLY
INTEGRATED CONTROL
ON / OFF
SWITCH
X1-1
F2
3.15A
X1-6
F1 X1-2
5A BUILDING
RECIRC PUMP
RELAY
X1-3
DHW PUMP
RELAY
F3
.8A
24V DC
SUPPLY
X5-9
X5-1
120 VAC
X4-3 X4-3
24 VAC
3.5A
AW 801
ONLY
CN5-5
FLOW
SWITCH
11
TANK
THERMOSTAT
13 13
LOW GAS HIGH GAS
PRESSURE PRESSURE
SWITCH SWITCH
9
9
LOUVER
RELAY COIL
24VAC
LOUVER
PROVING SWITCH
RIBBON CABLE
X5-6
S2
INLET
SENSOR
X5-4
S1a
OPERATING
1 SENSOR
X5-12
S1b
HIGH LIMIT
SENSOR
2
X5-5
S3a
FLUE
SENSOR
6
X5-13
S3b
FLUE
SENSOR X5-14
13
CONNECTION
BOARD
CN5-1 X4-7
1
ALARM
CONTACTS
X4-14
2 CN5-8
CN5-2 X4-6
3
RUN-TIME
CONTACTS
CN5-9
X4-13
4
S4 CN6 X6
16
TANK
CN6 X6
17
19
SHIELD
CN6 X6
20
A
CN6
X6
B 21
SHIELD 22
CN6
X6
BMS + 23
0-10V
CN6
- X6
IN 24
CN6 X6
+ 25
RATE
0-10V
OUT CN6
- X6
26
M
27
SHIELD
O
28 CN8-1 X6-1 X4-1
A
D
X6-2 B
29 CN8-2 X4-2
B
U
CN8-3 X6-3 X4-3
30
SHIELD
S
NEUTRAL GROUND
TERMINAL STRIP
L
120V SUPPLY "N"
IN
1 2
BLOWER
3
BUILDING
RECIRC PUMP
CONTACTS
BUILDING
RECIRC PUMP
RELAY
DHW PUMP
RELAY
DHW PUMP
CONTACTS
JUNCTION BOX
CONNECTION BOARD
LWCO
CN7-4
12
CN7-3
24 VAC
CN7-2
CN7-1
14
10
5
6
6
7 7
8
INTEGRATED
CONTROL
X7
AW 286-801 ONLY
BLOCKED
O-TEMP HEX SW
DRAIN SWITCH
AIR PRESSURE
SWITCH
GAS VALVE
BLOWER
SPARK
ROD
CAUTION HIGH VOLTAGE SPARK LEAD
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.
X9-2
X9-1
X9-3
Installation & Operation Manual
L
OUT
BUILDING
RECIRC
PUMP
DHW
PUMP
INTEGRATED
CONTROL
CN5-14 X4-8
CN5-10 X4-12
X4-10
CN5-12
X4-11
CN5-11
CN5-3 X4-5
CN5-4 X4-4
X5-2
X5-10
X5-11
X2-2
GAS VALVE
RELAY
X2-1
1 X5-7
2 X5-16
4 X5-8
5 X5-15
TR2
X1-7
FLAME ROD
BOX DEPICTS
OPTIONAL ITEMS
LOW VOLTAGE
120 VAC
HIGH VOLTAGE

LADDER DIAGRAM

LBL20341 REV A
49