Lochinvar 150,000Btu User Manual

EFFICIENCY BOILERS / WATER HEATERS WIRING DIAGRAMS

EB-EW-WRG-01

LADDER DIAGRAM – WATER HEATER

MODELS 150,000 - 300,000 BTU / HR

TO 120 VAC POWER SUPPLY

OPTIONAL EQUIPMENT WIRING

IF EQUIPPED

*

LWCO

6

POWER SWITCH

OFF ON

A

IGN MOD P5

IGN MOD P6

2

L1

(HOT)

PUMP

DELAY

IGNITER

120 VAC

24 VAC

THERMOSTAT

L2

COMBUSTION
AIR BLOWER

TRANSFORMER

CN 7

CN 8

24VDC

PUMP

DELAY

PUMP

*

WATER HEATER

LBL20019 REV A

LWCO

*

C

NO

NC

TDR

*

ALARM BELL

*

P 3-3

P 3-6

SWITCH

FLOW

SWITCH

X

IGNITION
MODULE

LIMIT

B

LOW

AIR

P 3-1P 3-7

P 3-8P 3-2

P 3-5

GAS

VALVE

MRHL

R1

W1

*

C

NO

NC

ALARM

*

CONTACTS

RELAY

(ALARM)

CN 1-4

CN 2-2

HFGV

*

LOUVER

**

CONTACTS

CN 1-3

CN 2-1

R2

W2

2 of 4

WIRING DIAGRAM – WATER HEATER
MODELS 150,000 - 300,000 BTU / HR

TRANSFORMER

ON-OFF

SWITCH

LOW AIR

NO

NC

C

PUMP

*

R1

W1

A

X

SWITCH

TERMINAL

BOARD

IGNITER

BLOWER

BC

LIMIT

GAS VALVE

IGNITION

MODULE

BK

BK/W

BK/W

W

GR

W

GR

BL

OR/R

BL

OR

Y

R/W

R/OR

R/BK

T

R

Y

Y

GR

W

Y

BL

BK W

BR

W

GY

GY

R/BK

GAS VALVE

HIGH FIRE

R/BK

LBL20017 REV A

R2

W2

Y

GY

GY

BURNER GROUND

GR

W

BR

R/W

BL

W

BK

*

OR

Y

W

21 C

NO
C

*

FLOW

SWITCH

PUMP DELAY/

FREEZE

PROTECTION

24 VDC

OPT. AMRHL

OPT. FMRHL

*

R/BK

R/W

BL/W

R/BK

OR

OR

BR

IF EQUIPPED

WIRING NOTES:

1. REMOVE JUMPER BETWEEN “ W1” AND “R1” TO CONNECT

REMOTE OPERATOR OR MOD-U-PAK.

2. WIRE ALL PROVING SWITCHES, FLOW SWITCHES, AND CONTROLS T

O

“X” & “B” IN SERIES TO SCREW TERMINALS.

NOTE: REMOVE JUMPER BETWEEN "X" & "B".

OPTIONAL AMRHL REQUIRES

MAX STOP SET @ 240°F

INLET

SENSOR

BK

BK

TANK

SENSOR

8

7-C

6-NO

5-NC

1

2-C

3-NO

4-NC

*

1

4

3

6

2

5

IF NOT EQUIPPED

WITH LWCO CONNECT

TO "R1". ELSE

CONNECT TO

LWC O "COM ".

BL

BL

OR

Y

Y

BL

BL

BL

BR

BR

ALARM BELL

ALARM

*

24V RELAY

TIME DELAY RELAY

BL

BL

BL

BL

SPLICE 5

Y

Y

T

Y

*

IF NOT EQUIPPED

WITH LWCO

WIRES TIED

OFF & CAPPED

IF NO HIGH FIRE GAS VALVE

WIRES TIED OFF & CAPPED

THERMOSTAT

*

ALARM

CONTACTS

DISCONNECT POWER BEFORE SERVICING UNIT

BL

C

NO

123

Y

OR

R

R

24V RELAY

TERMINAL

STRIP

*

LOUVER

CONTACTS

WATER HE ATER

T

P

OPTIONAL EQUIPMENT WIRING

BL/W

2

1

(+)

USE ELECTRICAL CONNECTION 1& 2

2

1

RESET

GND

RESET

P

J4

1

2

3

J2

J1

O.C.

3

2

1

6

4

5

J3

T

G

24

VAC

LWCO

BL/BK

OR

24

V

Y

BL

PRPR

OR

OR

OR

BUTTON

TEST

PROBE

T

T

RESET

PR

PR