Ladder Diagram - Lochinvar EcoKnight EKW85CE Installation, Commissioning And Maintenance Instructions

11.8

LADDER DIAGRAM

230VAC
TERMINAL STRIP
230V SUPPLY "L"
INTEGRATED CONTROL
ON / OFF
SWITCH
X1-6
X1-8
JUNCTION
BOX
F3
1.25A
F2
X5-7
X6-7
3.5A
X6-2
CONNECTION CONNECTION
CN4-7
CN4-14
MANUAL RESET
HIGH LIMIT X5-14
INTEGRATED
DISPLAY
PC
INTERFACE
RUN-TIME
CONTACTS
ALARM
CONTACTS
S4
TANK
SENSOR
SHIELD
A
RS485
B
SHIELD
+
EXTERNAL
0-10V
CONTROL
-
JUNCTION BOX
RETURN
F5
PUMP "L"
X1-2
5A RETURN PUMP
RELAY
RETURN
PUMP
DE-STRAT
PUMP "L"
X1-4
DE-STRAT PUMP
RELAY
DE-STRAT
PUMP
PRIMARY
PUMP "L"
X1-3
PRIMARY PUMP
TERMINAL
RELAY
STRIP
PRIMARY
PUMP
F4
X1-1
3.5A
BLOWER
RELAY
VENT SOLENOID
VALVE VLAVE
X1-5
230 VAC
X6-8
24 VAC
X6-3
BOARD BOARD
CN5-1
CONNECTION
FLOW
BOARD
SWITCH
CN5-3
16
15
TANK
THERMOSTAT
9
CONNECTION
PRESSURE
BOARD
X6-4 CN4-9
18
CONTROL
INTEGRATED
CONTROL
X3
RIBBON CABLE
X8
X5-8
S2
INLET
SENSOR
X5-1
S1
OUTLET
SENSOR
X5-2
S3
FLUE
X5-9
SENSOR
CONNECTION BOARD
CN4-11 X3-1
12
CN4-12 X3-3
11
CN4-10 X3-4
14
CN4-4 X3-2
13
CN3-5 X4-5
CN3-9 X4-9
CN3-7 X4-7
CN3-8 X4-8
8
CN3-6 X4-6
7
6
CN3-2 X4-2
5
CN3-1 X4-1
4
CN3-3 X4-3
3
CN3-10 X4-10
2
CN3-4
X4-4
1
FIGURE 11.6 LADDER DIAGRAM
NEUTRAL GROUND
TERMINAL STRIP
230V SUPPLY "N"
GND
RETURN
PUMP "N"
GND
DE-STRAT
PUMP "N"
GND
PRIMARY
PUMP "N"
TERMINAL
STRIP
FAN
1 2
3
JUNCTION BOX
CONNECTION
BOARD
CN4-8
CN4-1
CN5-2
LWCO
CN5-4
CN4-13
10
LOW GAS HIGH GAS
PRESSURE
SWITCH SWITCH
17
AUX. DEVICE 22
PILOT SUPPLY
24VAC 21
AUX. DEVICE
20
PROVING
CN4-2
19
BLOCKED
DRAIN
SWITCH
AUTO RESET
HI-LIMIT
GAS VALVE
FAN
FLAME ROD
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.
BOX DEPICTS
OPTIONAL ITEMS
LOW VOLTAGE
230 VAC
HIGH VOLTAGE
INTEGRATED
CONTROL
CN4-6 X6-9
X6-6
CN4-5 X6-1
CN4-3 X6-5
X6-10
X5-11
X5-4
X5-3
X5-10
X2-2
GAS VALVE
RELAY
X2-1
1 X5-5
2 X5-13
4 X5-6
5 X5-12
TR1
X1-7
33