Lochinvar 495, 000 - 2 Control Box Connections, MODELS 985,000, Wiring Diagram, 2,065,000 BTU/HR

51

BOARD

CONTROL BOX CONNECTIONS

CONNECTEDUNLESS ALARMADDED

R

8

S1

PR/BK

B

WIRING BOX

5

PR

C

PR/BK

Y

1

COM

1

4

7

10

13

CONNECTOR

4

PR

PR

Y BL

BL

2

+24

1

BR

1

4

BL/W

3

RST1

2

5

8

11

14

PR/BK

4

ALR

2 BR

2 5

3 2 1

W

5

S2-

DISPLAY

BK

6

S2+

3

6

9

12

15

3

PR/BK

3

6

SENSOR

3

2 1

R/BK

7

S2

OPTIONAL

P

10

P1

6

PR/BK

CONNECTOR

9

GY

11

IGN1

I/O RESET BOARD

GY

12

IGN1

BOILER ONLY

PR

R/

R/

BL/

PR

P

P

Y

PR/BK

BR

O

BR BR

Y BL

O/B T/W

T

PR

O

T

AC POWER

Y

BL

PR/

ELECTRONIC

BK

BK

BK

CONNECTOR A

PR/BK

2

3

11

1

6

9

5

4 8

12

10

7

8

14

13

15

PR/

CONTROLLER

CN3

1

2

3

4

Y

BK

BR

CN7

CN2

BR

BR

PUMP

CN7

1

INLET

BK

G

W

BK/

CN8

PROBE

BR

W

SHRINK

SENSOR

2

CN4

1

2

3

4

TUBING

ON

ENABLE

R

ALARM

FLAME FAIL

O

4

SHUTDOWN

DISABLE

R/BK

ENABLE RELAY ENABLE RELAY

OPTIONAL

SHUTDOWN

CN5

GROUND

24VOPTIONAL 24V

BR

3

O.A.

PR

I/O RESET

W2

SYS/

LINE

G

2

TANK

PR

1

CN6

NEUTRAL

O.A. MAX.

RATIO

W1

Y

W3

CHASSIS

BK

CN1

GROUND

BL

CN9 Y W

OPERATOR 2-STAGE THERMOSTAT

24V

SHRIN

OPTIONAL

COMMON Y

24VACXFMR.

RUNTIME

P

24V

120V

K

CONTACTS

TUBIN

G

BL/

-24V COM

PR

W

BKBK

OPTIONAL

BL

BL

24V

3

1

P

P

P

P

6

5

4

P

NOT USED

5

5

Y

9

7

Y

STG #1

Y

4

4

F

TO

R

Y

3

3

Y

9

NOT

R

2

2

R

9

7

F

LWCO

USED

BL

TH

R/BK

R

1

1

PR

6

6

5

4

7

RUNTIME

3

1

R/BK

R

MONITORING RELAY

RESET

PR

4

TO

R/BK

24V

5

BL/

-

+

F1

Y

BK

LWCO

O

GY

BK

5 S1

F2

C

NO

GY

-

BK/W

PR RESET

24 VAC

J1

BL

LINE

4

BK

BK/W

Y

W

C

NO NC

PR

1

LWCO

3

BK

+

R

FLAME

P

2

NEU

2

W

O.C.

3

J2

GY

1

S2/FS

FAIL

BK/W

BK

GY

G

GY

R/BK Y

R

O

T

W R BK

GND

GY

RESET #2

FULL-FIRE/

BL/

BLOWER RELAY

2 3

1

4

6

7

8

9

3

2

1

T

J4

O

BK BL

O

10

TH

PR

BL/W

SOCKET TOP VIEW

4

5

6

P

9

PI

BL

IGNITER

Y

8

24COM

BL/W

1

4

7

1

2

3

BL

CONNECTOR

J3

BL/W

7

RESET

BL

2

5

8

BL

6

24VAC

E

Y

R

5

MV

3

6

9

T

T/W

4

PS

IGNITION

CIRCUIT

M/S

BREAKER

MAIN UNIT

MODULE

D

CHASSIS GROUND

PR/BK

1

FF

T

CONNECTOR

CONNECTION DIAGRAM A

TO TEST SWITCH

LBL20015 REV A

MODELS 985,000 -	WIRING DIAGRAM
2,065,000 BTU/HR	- CONTROL BOX CONNECTIONS