Lochinvar 90 Schematic Diagram - M9 Unit, Wiring Diagram - M9 Unit, Installation & Service Manual

Installation & Service Manual

10 Diagrams (continued)

Schematic Diagram - M9 Unit

Wiring Diagram - M9 Unit

315,000 - 399,999 Btu/hr Models

315,000 - 399,999 Btu/hr Models

120

120V

A

GROUND

MV

MV/PV

PV

24V

GND

GNDBURNER

IGNITION

MODULE

SPARK

BL

PILOT

DEPICTSBOX

ITEMSOPTIONAL

REVLBL20159

LINE

CIRCULATION

NEUTRAL

BK

24VDC RELAY

PUMP

W

G

BK

PK

BK

MOT

W

R W BL

GY Y G

BK

120V

W

BL

TRANSFORMER

P

HI

GY

GY

24V

Y

C

CN1-1

OPERATOR CN1-2

VENTER

BL

SWITCH

R2W2

PV

C

MV

RELAYLOUVER

AUTO-RESET

HIGHLIMIT

GY

LOUVER

213

PLUG

GYY

V P

R=REDGY=GRAY

T=TANOR=ORANGE

W=WHITEPK=PINK

Y=YELLOWPR=PURPLE

SWITCH

HIGH LIMIT

Y

R

BL

1

LOW WATER

2

Y

CUTOFF

2

Y

BL

5

VENT DAMPER

3

R

THERMOSTAT

W

RELAY

BK

R

W

24VAC RELAY

PR

R

Y

W

LOW WATER

PR

ROLLOUT

MANUAL RESET

SPILL

CUTOFF

3

C

4

PR

PR

PR

1

INLET

SENSOR

SYSTEM

SENSOR

DAMPER PLUG

VENT

GY

BK=BLACK

BL=BLUE

BN=BROWN

G=GREEN

BK

BK

BL

BL

DAMPERVENT

YBKBNORBN

BL

R

23451

YRBL

PR

PR

PR

OPERATOR

FLOW

CN1-4

X

SWITCH

B

C

CN1-3

T

R

NO

BK

PR

LOUVER RELAY

2

VENTER RELAY

315&360 ONLY

R

Y

R

GY

VENTER

PR

VENT DAMPER

CNO

B

4

1

1

BK

PROVING

INLET

SENSOR

SYS/ TANK

15

GY

3

O R

13 614 155200

FIRE-HIGHDIFFERENTIAL

OFFSET

BL

W

Y

CN1

SENSORO.A.

65

SW1

DISABLE

O.A.SHUTDOWN HIGH

0.70.8

0.6 65W3 VR2

1.50.5

RATIO

9

8

FLOW SWITCH

W1R1X

WR

V

P

10

T

AUTO-RESET

GY

FIRE

W2

5

HIGH LIMIT

1.0 1.1

W1

ENABLEON

0.9

1.3

24V

GAS VALVE

IGNITION

10

12

MV/

MV/

24V

PV

MODULE

GND

PV

PV

PV

AIROUTDOORRESET

7 120

5060 PUMP RELAY

4070

SHUTDOWN-°FLOW

55FIRE5060

4070

MAX.O.A.-°F

180 140

240OFF

SETPOINT

ONCONTACT

FAILUREANY

43215

YWPRRT

IGNITION

PILOT

BURNER

G

SPARK

55

VR3

45

VR1

160

200

220

MODULE

BL

GND

45

MV

MV

R

R

LOW

HIGH FIRE

PILOT

R

HIGH

OUTDOOR SENSOR

OR

OR

PR T

Y

BL

ONLY

OPERATOR

W2

CN2-1

CN2-2

R2

O

CN3

BK

T

SERVICINGBEFORE

RESETMANUALOR LIMITHIGHOR

PUMP

DELAY

21CSWITCH

CUTOFFWATERLOW

T MANUALROLLOUT RESET A

PRP2

P1 BK1

OR BN AUTO

RESET

1BK 2

4 PR

WIRING,REPLACINGWHENUSE HIGHEROREQUALOFWIRE GAUGE.ANDTEMPERATURE

315&360

CN4

INLET SENSOR

2

3

4

BK

PRSPILL

PR

WATERLOW

PLUGCUTOFF

BL1

2

W3W

SYSTEM SENSOR

SWITCH

Y

CN5

BL

T

CN6

BL

CN7

OR

R

CN8

24VDC RELAY

Y

Y

OR

BN

OR

3

4

5

1

2

T

OFF RELAY

OR

ARMING RELAY

BL

TD

Y

W

TIMER

OFF RELAY

6

7

FAILURE CONTACTS

R

R

Y

ARMING RELAY

POWERDISCONNECT

LBL20160

BK

24VDC

RELAY

(BLACK)

BK

CIRCULATION

PUMP

PKBK

W BKBK

BL

WWY

TRANSFORMER

GG

BOXJUNCTION

PR

R

Y

PK

CONTACTS ON ANY FAILURE

315&360 ONLY

W

BK=BLACK

GY=GRAY

R=RED

BOX DEPICTS

REV

BL=BLUE

OR=ORANGE

T-TAN

BN-BROWN

PK=PINK

W=WHITE

OPTIONAL ITEMS

YLPPUS REWOP

A

G=GREEN

PR=PURPLE

Y=YELLOW

65