Lochinvar 399 operation manual 2 Ladder Diagram, Diagrams continued

Installation & Operation Manual

13 Diagrams (continued)

Figure 13-2Ladder Diagram

			BOX DEPICTS
			OPTIONAL ITEMS
120VAC	JUNCTION BOX	NEUTRAL	GROUND
			LOW VOLTAGE
TERMINAL STRIP		TERMINAL STRIP	120 VAC
120V SUPPLY "L"		120V SUPPLY "N"

HIGH VOLTAGE

ON / OFF

SWITCH

X1-6

X1-8

JUNCTION

BOX

X5-7

X6-7

X6-2

CN4-7

CN4-14

MANUAL RESET

HIGH LIMIT

	PC
BELLALARM	INTERFACE
	CN2-15
SWITCH	CN2-10
SILENCING	CN2-9
	CN2-7
	CN2-8

INTEGRATED CONTROL						L		L
				SYSTEM PUMP
F5			X1-2	RELAY		IN	SYSTEM	OUT
5A		SYSTEM PUMP					PUMP
							CONTACTS
		RELAY
				BOILER PUMP
			X1-4	RELAY				SYSTEM
							BOILER	PUMP
		BOILER PUMP					PUMP
		RELAY					CONTACTS
				DHW PUMP
			X1-3	RELAY
								BOILER
		DHW PUMP					DHW	PUMP
		RELAY					PUMP
							CONTACTS
				BLOWER
	F4		X1-1	1	2
								DHW
	3.5A	BLOWER					RELAY BOARD	PUMP
F3		RELAY		3
1.25A
	120 VAC		X1-5	JUNCTION BOX
F2			X6-8
3.5A	24 VAC		X6-3	RESISTOR		CN4-1	CONNECTION BOARD
CONNECTION
BOARD		CN5-1				CN5-2		INTEGRATED
					LWCO
			CONNECTION					CONTROL
		FLOW
				BOARD
		SWITCH		CN5-3		CN5-4	CN4-6	X6-9
	CN2-9			CN2-10
		ROOM THERMOSTAT
		ZONE CONTROL					CN4-13 X6-6
	CN2-2						CN2-1
		DHW
		THERMOSTAT					CN4-5 X6-1
	CN2-4		CONNECTION		LOW GAS	HIGH GAS	CN2-3
				BOARD	PRESSURE	PRESSURE
X5-14		X6-4 CN4-9			SWITCH	SWITCH	CN4-3 X6-5
INTEGRATED				CN2-12			CN2-11
CONTROL				INTEGRATED
				CONTROL		AUX. DEVICE	CN2-16
						PILOT SUPPLY
DISPLAY						24VAC	CN2-15
						AUX. DEVICE	CN2-14
						PROVING
							CN4-2	X6-10

X3		AIR PRESSURE	CN2-13
			X5-11
		SWITCH
	RIBBON CABLE		X5-4
		X8
		BLOCKED	X5-3
	X5-8	DRAIN SWITCH

INLET	S2		X5-10
SENSOR
	S1	X5-1
OUTLET		GAS VALVE	X2-2
SENSOR
	S3	X5-2		GAS VALVE
FLUE		X5-9	X2-1	RELAY
SENSOR
		BLOWER	1	X5-5
CONNECTION BOARD

			CN2-6	CN4-11 X3-1
	RUN-TIME			CN4-12	X3-3
	CONTACTS
			CN2-5
				CN4-10	X3-4
		ALARM	CN2-8	CN4-4	X3-2
	CONTACTS
			CN2-7
		S6		CN3-8 X4-8
SYSTEM			CN1-12	CN3-7	X4-7
SENSOR			CN1-11
(AUX) DHW		S4		CN3-9	X4-9
			CN1-10
TANK				CN3-6	X4-6
SENSOR		S5	CN1-9
OUTDOOR			CN1-8	CN3-5	X4-5
SENSOR			CN1-7
SHIELD
			CN1-6	CN3-2	X4-2
	A
RS485			CN1-5	CN3-1	X4-1
	B
			CN1-4	CN3-3	X4-3
SHIELD
			CN1-3	CN3-10	X4-10
EXTERNAL +
		0-10V	CN1-2	CN3-4	X4-4
CONTROL	-
			CN1-1

2 X5-13

4 X5-6

5 X5-12

TR1

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.

LADDER DIAGRAM

LBL2356 REV C

73