Lochinvar WH 55-399 Diagrams, 1 Ladder Diagram, Installation & Operation Manual, Low Voltage

Installation & Operation Manual

13 Diagrams

Figure 13-1Ladder Diagram

120VAC		JUNCTION BOX					NEUTRAL GROUND
TERMINAL STRIP							TERMINAL STRIP
120V SUPPLY "L"							120V SUPPLY "N"
						1	2
ON / OFF	INTEGRATED CONTROL					GND	BLOWER
SWITCH				SYSTEM		SYSTEM
X1-6	F2		X1-1				3
			X1-2	PUMP "L"		PUMP "N"
	3.15A
	F1				SYSTEM	GND
				BOILER	PUMP	BOILER
	5A	SYSTEM PUMP
			X1-4	PUMP "L"		PUMP "N"
		RELAY
		BOILER PUMP			BOILER	GND
		RELAY			PUMP
				DHW		DHW
		DHW PUMP	X1-3	PUMP "L"		PUMP "N"
	F3	RELAY
				TERMINAL		TERMINAL
	.8A	24V DC		STRIP	DHW	STRIP
X5-9		SUPPLY	X5-1		PUMP
	120 VAC
X4-3	24 VAC

CN5-5

CN7-3

CN7-1

19

17

15

15

13

13

10

PC INTERFACE

	CONNECTION BOARD
					INTEGRATED
					CONTROL
LWCO			FLOW	CN5-14 X4-8
	CN7-4	11	SWITCH	12
				CN5-10	X4-12
24 VAC
	CN7-2
HEAT/LOOPDEMAND 1				CN5-7	X4-1
	20
HEAT/LOOPDEMAND 2				CN5-13	X4-9
	18
HEAT/LOOPDEMAND 3				CN5-6	X4-2
	16
TANK
THERMOSTAT				CN5-12	X4-10
	14
LOW GAS	HIGH GAS
PRESSURE	PRESSURE
SWITCH	SWITCH			CN5-11	X4-11
	9
	INTEGRATED			CN5-3	X4-5
	CONTROL		LOUVER	5
			RELAY COIL
			24VAC	6
			LOUVER	7
			PROVING SWITCH
				CN5-4	X4-4
	X7
RIBBON CABLE
				X5-2
S2	X5-6			X5-10

ALARM	BELL	1
SILENCING	SWITCH	2
		6

13

ALARM

CONTACTS

RUN-TIME

CONTACTS

INLET

SENSOR

OPERATING

SENSOR

HIGH LIMIT

SENSOR

FLUE

SENSOR

FLUE

SENSOR

CONNECTION

BOARD

1

2

3

4

S1a	X5-4	AIR PRESSURE	X5-11
		SWITCH
S1b	X5-12
			X2-2
S3a	X5-5	GAS VALVE
				GAS VALVE
	X5-13		X2-1	RELAY
S3b
	X5-14	BLOWER
			1	X5-7
			2	X5-16
CN5-1	X4-7
CN5-8	X4-14		4	X5-8
CN5-2	X4-6		5	X5-15
CN5-9	X4-13		TR2

SYSTEM

S6

21

CN6	X6
	X1-7

SENSOR

OUTDOOR S5 SENSOR

TANK S4 SENSOR

SHIELD

A

CASCADE

B

SHIELD

BMS +

22

23

24

26

27

29

30

31

32

33

CN6	X6
CN6	X6	FLAME ROD
		SPARK
CN6	X6	ROD
CN6	X6	CAUTION HIGH VOLTAGE SPARK LEAD
CN6	X6	NOTES:
CN6	X6	1. Where possible, switches are shown without utilities (gas, water or
CN6	X6	electricity) connected to the unit. As such, actual switch states may

IN -

0-10V

34

CN6	X6	vary from those shown on diagrams depending upon whether utilities
CN6	X6	are connected or a fault condition is present.

SYS PUMP +

35

2. See wiring diagram for additional notes.

IN -

0-10V

36

CN6	X6
CN6	X6

BLR PUMP + 0-10VOUT -

RATE + 0-10V OUT -

SHIELD

A

MODBUS

B

SHIELD

37

38

39

40

41

42

43

44

	CN6	X6		BOX DEPICTS
	CN6	X6		OPTIONAL ITEMS
		M		LOW VOLTAGE
				120 VAC
CN8-1	X6-1	O X4-1	X9-2
		D		HIGH VOLTAGE
CN8-2	X6-2	B X4-2	X9-1
CN8-3	X6-3 U X4-3		X9-3	LADDER DIAGRAM
		S
				LBL20170 REV D

78