Lochinvar 801, 400 operation manual 2Ladder Diagram

Installation & Operation Manual

13 Diagrams

Figure 13-2Ladder Diagram

120VAC JUNCTION BOX NEUTRAL

TERMINAL STRIP					TERMINAL STRIP
120V SUPPLY "L"					120V SUPPLY "N"		L
							IN
						GROUND	SYSTEM
ON / OFF		INTEGRATED CONTROL					PUMP
SWITCH					BLOWER		CONTACTS
X1-6		F2		X1-1	1	2
		3.15A
		F1		X1-2	3		BOILER
							PUMP
							CONTACTS
		5A	SYSTEM PUMP	SYSTEM PUMP
			RELAY	X1-3	RELAY
			DHW PUMP		DHW PUMP		DHW
			RELAY	X1-4	RELAY		PUMP
							CONTACTS
			BOILER PUMP		BOILER PUMP
		F3	RELAY		RELAY
		.8A	24V DC				RELAY BOARD
X5-9			SUPPLY	X5-1
		120 VAC
X4-3	3.5A	24 VAC
KB 801 ONLY						CONNECTION BOARD

		CN5-5					FLOW		CN5-14		X4-8
			LWCO
			CN7-1		CN7-4	11	SWITCH		12
									CN5-10		X4-12
			CN7-3		CN7-2
			CONNECTION BOARD				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
						INTEGRATED			CN5-3		X4-5
								LOUVER
						CONTROL			5
								RELAY COIL
								24VAC	6
								LOUVER	7
								PROVING SWITCH
									CN5-4		X4-4
						X7			8
					RIBBON CABLE
										X5-2
	PC INTERFACE							O-TEMP HEX SW	BLOCKED	X5-10
					X5-6				DRAIN SWITCH
				S2
			INLET
ALARM	BELL	1	SENSOR						AIR PRESSURE	X5-11
					X5-4				SWITCH
			OPERATING	S1a
			SENSOR
			HIGH LIMIT	S1b	X5-12			GAS VALVE
										X2-2
		2	SENSOR
SILENCING			FLUE	S3a	X5-5
	SWITCH
		6	SENSOR							X2-1
					X5-13
				S3b
			FLUE
			SENSOR		X5-14			BLOWER
		13	CONNECTION							1	X5-7
			BOARD							2	X5-16

L

OUT

SYSTEM

PUMP

BOILER

PUMP

DHW

PUMP

INTEGRATED

CONTROL

GAS VALVE

RELAY

	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		CN3-9		X4-9
SENSOR			27		CN3-6		X4-6
SHIELD			29
	A		30		CN6		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 C

78