Lochinvar 000 - 2, 495 MODELS 985,000, 2,065,000 BTU/HR, Wiring Diagram, Schematic And

50

120 VAC

WARNING: THIS HEATER MAY BE CONNECTED TO ONE OR

NOTES:

STRIP REQUIRE THE REMOVAL OF SOME OF THE SHORTING BARS FROM THE TERMINAL STRIP.

Ground Line

15AMPS

Neutral

MORE BRANCH CIRCUITS.

TO PREVENT ELECTRICAL SHOCK,

(3) SCHEMATIC IS WIRING DIAGRAM, REFER TO ACTUAL COMPONENTS FOR EXACT TERMINAL LOCATIONS.

ENSURE ALL BRANCH CIRCUITS ARE DE-ENERGIZED BEFORE

(1) WHERE POSSIBLE, ALL SWITCHES AND CIRCUITRY ARE SHOWN IN THEIR AT REST STATES.

G

BK

W

ATTEMPTING TO SERVICE THIS EQUIPMENT.

(2) ADDITION OF ENERGY MANAGEMENT SYSTEMS OR OPTIONAL LIMIT SWITCHES TO THE TERMINAL(4) WHEN REPLACING DAMAGED WIRING, USE EQUIVALENT TYPE AND GAUGE.

60Hz

W

LOUVER/

FLAME CURRENT TEST PINS

GY

CHASSIS

NC

POWER

GROUND

BK

BK

BK

BK

C

GY

VENTER

1

2

NO

CONTACTS

ON/OFF

BURNER

BK

LR

W

POWER

BK

W

- +

F1

BK/W

NC

LOW

W

PR

TD

Y

GROUND

SWITCH

120

FIELD SUPPLIED

FIELD SUPPLIED

G

GY

5

S1

F2

BK/

R

ALARM

R

VAC

SAFETY DEVICES

SAFETY DEVICES

GY

4

LINE

-

W

C

NO

BK

HIGH

-

BL

PR

PR

PR

PR

PR CONTINUOUS

PR

INTERMITTENT

PR

PR

CONTACTS

R

TRIAL

3

STATUS

BLOWER

+

HI-LIMIT

AUX. HI-

ALARMS

ALARMS

BL

BL

NEU

+

24

HiGas

A1

A2

A3

SILENCE

Y

IGNITER

GY

2

W

2

LIMIT

B1

B2

B3

Y

VAC BL

NO

NO

LoGas

O/

STAGE #1

BR

OPTIONAL

CONTACTS

GY

1

S2/FS

C

NO P

RUN-TIME

BL

ALARM BELL

C

BR

C

BK

LOW FIRE

ANY FAILURE

OPTIONAL

P

CONTACTS

NC

C

NO

11

OPTIONAL

NC

C

1C

1NO

C

Y

R

O/BK

O/BK

O

TH

CIRCUIT BREAKER

~~

1

BL/

BL

DC 24V COIL

O

BL

10

RT

Y

O.C.

O

O

6

24VAC

RUN-TIME RELAY

TEST

BL/

O

PR

P

P

9

PI

FIELD INSTALLED

BL

~

SWITCH

~~~

NC

PURGE

RESETS

8

24COM

Y

Y

~~

SAFETY DEVICES

~ PROBE

T

T

T

PUMP RELAY

FACTORY FLOW SWITCH

BL

BL/W

7

RESET

~

~~

~~

LOW FIRE VALVE(S)

CONTINUOUS INTERMITTENT

Y

~

LOUVER

J1

O BK

BR

OPERATOR

CN2

CN3

INLET

LOW AIR

T/

5

MV

R

R

Y

BL

J3

BL & Y = 24VAC

CN7

T

PROVING

A1 A2

A3

B1 B2

B3

RESET

24 VAC

5

BR

SENSOR

4

PS

IGNITION

R

Y

LWCO

3

PU

BR

2-STAGE THERMOSTAT

INLET

W

3

6

CN8

1

CONTINUOUSLY INTERMITTENTLY

CHASSIS

GROUND

PR

4

2

Y

PUMP

NO

PROBE

R/BK

2

M/S

MODULE

C

NO

BL

PR

O

1

PR

BK

4

BR

STAGE #2

R

STAGE #1 LED

OK

OK

J2

TO POWER

C

2

PR/BK

1

FF

NC

COM

FAIL

COM

FAIL

Y

P

1

2 3

J4

W

NC

BLANK COVER

R

R

R

R/BK

Y

RESET

MONITORED

MONITORED

Y

OPTIONAL ON

BK

3

PROVIDED IF

CN5

SYSTEM/TANK

ALARM

R/BK

HIGH FIRE

HIGH FIRE VALVE(S)

NOTE: SHOWN WITH SHORTING

GND

BOILER

NO I/O RESET

PR

SENSOR

Y

Y

2

SYS/

PR/

2C 2NO

BARS REMOVED AND ATTACHED

OPTION IS

TANK

BK

R/BK

R/BK

HL

Y

DEVICES IN NON-ALARM STATE.

1

PR

EXAMPLE DEVICES:

BL

PROVIDED

CN6

PR/

PR/

HIGH/LOW FIRE & BLOWER

HIGH/LOW GAS, AUX. HI-LIMIT

OPTIONAL

CN9

PR/BK

CN1

SPEED CONTROL RELAY STAGE #2 LED

AUX. LIMITS, EXT. FLOW SWITCH

Y

O.A.

BK

BK

PR/BK

I/O RESET

R/BK

Y

SENSOR

BOARD

BL

OPTIONAL

ITEM

INDICATES

CN7

BOILER ONLY

FFR

NO

Y

JUNCTION POINT

SENSOR

NC

(ELECTRICALLY SAME)

R

= RELAYS LOCATED ON CO NTRO L

ON

ENABLE

C

P

NO

CLOSED END SPLICE

PANEL

SHUTDOWN

DISABLE

BL

C

PR

DOTTED LINE

R = RELAYS LOCATED IN WIRING BO X

O.A.SHUTDOWN

TO

PR

INDICATES OPTIONAL

W2

CN9

OFF

DIFFERENTIAL

HIGH-FIRE

P

EQUIPMENT

= LEDS LO CATED ON DISPLAY BOARD

SETPOINT

W = WHITE

T=TAN

OFFSET

C

NO

Y

BK = BLACK

Y=YELLOW

CONNECTS HERE

PR=PURPLE

BR=BROWN

= O PTIONAL DIN RAIL CONNECTORS

O.A. MAX.

RATIO W1

W3

PR

AL

Y

BL=BLUE

G=GREEN

LO CATED IN ELECTRICAL WIRING BO X .

CONTACTS

Y

P=PINK

GY=GRAY

O=ORANGE

R=RED

ANY FAILURE

Y/G = YELLOW WITH GREEN STRIPE

LBL20014 REV- A

MODELS 985,000	SCHEMATIC AND
- 2,065,000 BTU/HR	WIRING DIAGRAM