Lochinvar 51-211 operation manual 2Wiring Diagram

Installation & Operation Manual

13 Diagrams

Figure 13-2Wiring Diagram

ALARM BELL	BELL JUMPER
SILENCING SWITCH

			LOW VOLTAGE			BOX DEPICTS
			120 VAC
						OPTIONAL ITEMS
			HIGH VOLTAGE				BOX DEPICTS
							DUAL SENSOR
						SINGLE HOUSING
			CONNECTION BOARD		INTEGRATED				BOX DEPICTS
					CONTROL			JUNCTION
									OPTIONAL
								BOX		ITEMS
ALARM		1			X-7	X1-3	OR	L
CONTACTS		2							G	DHW
RUN-TIME		3						N		PUMP
							W
CONTACTS		4
						X1-4	BR	L
24 VAC LOUVER		5							G	BOILER
RELAY COIL		6						N		PUMP
							W
LOUVER		7
			CN5-1	BK	X4-7	X1-2	PR	L
PROVING SWITCH		8							G	SYSTEM
			CN5-8	BK	X4-14
GAS PRESSURE		9					W	N		PUMP
			CN5-2	BK	X4-6
SWITCH		10
			CN5-9	BK	X4-13
			CN5-3	BK	X4-5		KB ONLY
			CN5-10	BK	X4-12		ON/OFF
			CN5-11	BK	X4-11		SWITCH		L	120V
FLOW		11	CN5-4	BK	X4-4	X1-6	BK	L
			CN5-5	BK	X4-3	X1-5	W	N	GND	SUPPLY
SWITCH		12	CN5-14	BK	X4-8				N
TANK		13	CN5-12	BK	X4-10
THERMOSTAT		14	CN5-6	BK	X4-2
HEAT/LOOP	3	15	CN5-13	BK	X4-9	X1-8	G
DEMAND		16	CN5-7	BK	X4-1	X1-1
HEAT/LOOP	2	17					R
DEMAND		18
HEAT/LOOP	1	19						TRANSFORMER
DEMAND		20

SYSTEM	21		R W G
SENSOR	22		1 2 3
OUTDOOR	23
SENSOR	24
	25	BLOWER
TANK	26
SENSOR	27
	28	1 2 3	4 5
SHIELD	29
A	30
CASCADE	31
B
SHIELD	32

				CN6	X5-7	R
					X6	T
					X5-16
BMS	+		33		X5-8	W
		0-10V
IN	-		34		X5-15	BK
SYS PUMP	+	0-10V	35		X5-9	Y
IN	-		36
BLR PUMP	+	0-10V	37		X5-1	BL
OUT	-		38		X5-2	O	KB 286 ONLY
RATE	+	0-10V	39
					X5-10	BLOCKED DRAIN SWITCH	O-TEMP HEX SW
OUT	-		40			P
SHIELD			41			AIR PRESSURE SWITCH
MODBUS	A		42		X5-11	O/BK
OPTION	B		43		X5-4	-T
						R/BK	OPERATING SENSOR S1a
SHIELD			44
					X5-12	-T	HIGH LIMIT SENSOR S1b
		24 VAC	CN7-1			GY
LOW					X5-6	-T	INLET SENSOR S2
CUT-OFF		COM	CN7-2	CN8-1 CN8-2 CN8-3		P/BK
			CN7-4		X5-5	W/BK	FLUE SENSOR S3a
WATER			CN7-3			-T
					X5-13	-T	FLUE SENSOR S3b
				R BLG		PR

X5-14

X6-3

X6-2 X6-1 X6-4

Y

X2-2

BK

GAS VALVE

X4-1

O

X9-1

X2-1

@24VAC

Y

X4-2

GY

X9-2

MODBUS BOARD

X4-3

G

X9-3

X1-7

W/R

FLAME SENSOR

G

X4-4

X9-4

MTR-01

TR2

SPARK

SHIELD

ROD

GROUNDING

X5-1

X5-2

CAUTION

HIGH VOLTAGE SPARK LEAD

JUMPER

X1-1

BK

X1-2

W

X1-3

G

Notes:

1.All wiring must be installed in accordance with: local, state, provincial and national code requirements per either N.E.C. in USA or C.S.A. in Canada.

2.If any original equipment wire as supplied with the appliance must be replaced, it must be replaced with wire having same wire gauge (AWG) and rated for a minimum of 105°C. Exceptions: Replacement high voltage spark lead and ribbon cables must be purchased from the factory. Use of a non-approved spark lead or ribbon cables can lead to operational problems which could result in non-repairable damage to the integrated controller or other components.

3. Actual connector block locations may vary from those shown on diagrams. Refer to actual components for proper connector block locations when using	WIRING DIAGRAM
diagrams to troubleshoot unit.	LBL20127 REV E

79