Lochinvar 400-801 operation manual 2Ladder Diagram

Outdoor Knight XL Installation & Operation Manual

10 Diagrams (continued)

Figure 10-2Ladder Diagram

120VAC	JUNCTION BOX	NEUTRAL
TERMINAL STRIP		TERMINAL STRIP
120V SUPPLY "L"		120V SUPPLY "N"
		L
		IN

GROUND

ON / OFF	INTEGRATED CONTROL
SWITCH				BLOWER
X1-6	F2		X1-1	1	2
	3.15A
	F1		X1-2	3
	5A	SYSTEM PUMP	SYSTEM PUMP
		RELAY	X1-3	RELAY
		DHW PUMP		DHW PUMP
		RELAY	X1-4	RELAY
		BOILER PUMP		BOILER PUMP
	F3	RELAY		RELAY
	.8A	24V DC
X5-9		SUPPLY	X5-1
	120 VAC
	3.5A

SYSTEM

PUMP

CONTACTS

BOILER

PUMP

CONTACTS

DHW

PUMP

CONTACTS

RELAY BOARD

L

OUT

SYSTEM

PUMP

BOILER

PUMP

DHW

PUMP

X4-3

KB 801

ONLY

CN5-5

PC INTERFACE

ALARM BELL 1

24 VAC

		CONNECTION BOARD
								INTEGRATED
	LWCO							CONTROL
				FLOW		CN5-14		X4-8
CN7-3		CN7-4	11	SWITCH	12
						CN5-10		X4-12
	24 VAC
CN7-1		CN7-2
	HEAT/LOOPDEMAND 1					CN5-7		X4-1
19		20
	HEAT/LOOPDEMAND 2					CN5-13		X4-9
17		18
	HEAT/LOOPDEMAND 3					CN5-6		X4-2
15		16
	TANK
	THERMOSTAT					CN5-12		X4-10
13		14
	LOW GAS	HIGH GAS
	PRESSURE	PRESSURE
	SWITCH	SWITCH				CN5-11		X4-11
10		9				CN5-3		X4-5
		INTEGRATED
				LOUVER
		CONTROL			5
				RELAY COIL
				24VAC	6
				LOUVER	7
				PROVING SWITCH		CN5-4		X4-4
		X7			8
	RIBBON CABLE
							X5-2
				O-TEMP HEX SW	BLOCKED		X5-10
		X5-6			DRAIN SWITCH
	S2
INLET
SENSOR					AIR PRESSURE
		X5-4					X5-11
OPERATING S1a					SWITCH
SENSOR
HIGH LIMIT	S1b	X5-12		GAS VALVE
							X2-2
SENSOR

2

6

FLUE SENSOR

S3a

X5-5

X5-13

	GAS VALVE
X2-1	RELAY

FLUE

S3b

SENSOR

X5-14

13

CONNECTION

BOARD

BLOWER	1	X5-7
	2	X5-16

	ALARM		1		CN5-1		X4-7
CONTACTS			2		CN5-8		X4-14
			3		CN5-2		X4-6
	RUN-TIME
CONTACTS			4		CN5-9		X4-13
SYSTEM		S6	21		CN6		X6
SENSOR			22		CN6		X6
OUTDOOR		S5	23		CN6		X6
SENSOR			24
TANK		S4	26		CN6		X6
SENSOR			27		CN6		X6
SHIELD			29		CN6
	A		30				X6
CASCADE
	B		31		CN6		X6
SHIELD			32		CN6		X6
BMS +			33		CN6		X6
		0-10V
IN -			34		CN6		X6
					CN6
SYS PUMP	+		35				X6
		0-10V
IN	-		36		CN6		X6
BLR PUMP	+		37		CN6		X6
		0-10V
OUT	-		38		CN6		X6
RATE	+		39		CN6		X6
		0-10V
OUT	-		40
						M
SHIELD			41
	A		42	CN8-1	X6-1	O	X4-1	X9-2
						D
MODBUS B			43	CN8-2	X6-2	B	X4-2	X9-1
SHIELD			44	CN8-3	X6-3 U		X4-3	X9-3
						S

4 X5-8

5 X5-15

TR2

X1-7

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 120 VAC HIGH VOLTAGE

LADDER DIAGRAM

LBL20141 REV D

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