Ladder Diagram - Lochinvar Knight XL 601 Installation & Operation Manual

10
Diagrams
Figure 10-2 Ladder Diagram
120VAC
PC INTERFACE
SYSTEM
SENSOR
OUTDOOR
SENSOR
TANK
SENSOR
SHIELD
CASCADE
SHIELD
BMS
SYS PUMP
BLR PUMP
OUT
RATE
OUT
SHIELD
MODBUS
SHIELD
(continued)
JUNCTION BOX
TERMINAL STRIP
120V SUPPLY "L"
INTEGRATED CONTROL
ON / OFF
SWITCH
X1-6 F2 X1-1
3.15A
F1 X1-2
5A
SYSTEM PUMP SYSTEM PUMP
RELAY RELAY
X1-3
DHW PUMP DHW PUMP
RELAY
RELAY
X1-4
BOILER PUMP BOILER PUMP
RELAY RELAY
F3
.8A
24V DC
SUPPLY
X5-9
X5-1
120 VAC
3.5A
X4-3
24 VAC
KB 801
ONLY
LWCO
CN5-5
CN7-3
24 VAC
CN7-1
HEAT/LOOP
1
DEMAND
19
HEAT/LOOP 2
DEMAND
17
HEAT/LOOP 3
DEMAND
15
TANK
THERMOSTAT
13
LOW GAS HIGH GAS
PRESSURE PRESSURE
SWITCH SWITCH
10
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
CN5-8 X4-14
2
CN5-2 X4-6
3
RUN-TIME
CONTACTS
CN5-9
X4-13
4
CN6 X6
S6
21
CN6 X6
22
S5 CN6 X6
23
24
CN6
S4 26 X6
CN6 X6
27
29
CN6 X6
30
A
CN6 X6
31
B
CN6 X6
32
CN6
X6
+ 33
0-10V
- CN6 X6
IN 34
CN6 X6
+ 35
0-10V
IN
CN6 X6
- 36
CN6 X6
37
+
0-10V
CN6
- X6
38
CN6 X6
+ 39
0-10V
-
40
M
41
O
42 CN8-1 X6-1 X4-1
A
D
43 CN8-2 X6-2 B X4-2
B
U
CN8-3 X6-3 X4-3
44
S
Outdoor Knight XL Installation & Operation Manual
NEUTRAL
TERMINAL STRIP
120V SUPPLY "N"
L
IN
GROUND
BLOWER
1 2
3
RELAY BOARD
CONNECTION BOARD
FLOW
CN7-4 SWITCH
11 12
CN7-2
20
18
16
14
9 9
INTEGRATED
CONTROL LOUVER
5
RELAY COIL
6
24VAC
LOUVER
7
PROVING SWITCH
X7
8
DOOR
TEMP O-TEMP
BLOCKED
SW 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
L
OUT
SYSTEM
PUMP
CONTACTS
SYSTEM
PUMP
BOILER
PUMP
CONTACTS
BOILER
PUMP
DHW
PUMP
CONTACTS
DHW
PUMP
INTEGRATED
CONTROL
CN5-14 X4-8
CN5-10 X4-12
CN5-7 X4-1
CN5-13 X4-9
CN5-6 X4-2
CN5-12
X4-10
CN5-11 X4-11
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

LBL20400 REV A
55