Diagrams | Lochinvar 90, 500 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

Image 65

Lochinvar 90, 500 service manual Diagrams

Contents

Models 90,000 500,000 Btu/hr Contents Checking equipment Please read before proceeding Codes Copper-fin =B=R Rating Ratings Copper-fin Specifications Gas connection pipe Copper-fin How it works Models CWN270 Front View Model CWN399 Front View 422 Location of unit Determine unit location 3Combustion Air Direct from Outside Determine boiler location 6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Vent Pipe Sizes VentingConventional Negative Draft Venting System Venting Less from Ridge From Parapet Wall Vertical Vent Termination Clearances Vent Materials Masonry Chimney InstallationSidewall Venting Number 7CB with Vent Damper and Vent Damper Terminal Block Automatic Vent Damper Gas Supply Gas Pressure Test Gas connectionsGas Connection Manifold Pressure Gas Piping Install Piping to Control Clockwise to raise regulator gas pressure, counterclockwise Gas Manifold Pressure Adjustment Procedure 4Gas Supply Pressure Checking Gas Supply Pressure Two Stage Burner Control System Combination Gas ValvesVenting of Combination Gas Valves Relief Valve Water Flow Switch if equippedHydronic piping Low Water Cutoff if equipped Typical Heating Boiler InstallationsMinimum Required Flow For Heating Boiler General Plumbing Rules Piping of the Boiler System System Temperature Rise Chart Circulator Pump Specifications Heat Exchanger Pressure Drop ChartWater Connections Heating Boilers Only Circulator Pump Requirements Primary/Secondary Boiler Piping Boiler Flow Rates Three Way Valves 4Primary / Secondary Piping of a Single Boiler Primary / Secondary Piping Not to Exceed 4 Pipe DIA or MAX. of 12 Apart 8Multiple Boilers Zoned with Circulators Boiler Operating Temperature Control Terminal Strip WiringPower Venter Connection to Terminal Strip Electrical connections Operating Temperature Control Temperature AdjustmentPump Wiring for a Heating Boiler Temperature Control Settings Locating Temperature ControlMaximum SET Point Determination Maximum Set Point Determination Inlet Water Temperature Sensor Temperature Control SensorsMulti-Purpose Temperature Sensor Outdoor Air Temperature Sensor Installation of a Tank Sensor Water Heater Application Outdoor Air Reset OptionInstallation of a Remote Sensor Boiler Application Additional Temperature Controls Manual Reset High Water Temperature Limit Control Blocked Vent and Flame Roll-Out / Flame Interlock Switch Initial Start-up Pre-start ChecklistStart-up 1Gas Valve 90,000 270,000 Btu/hr Models Lighting Instructions To Turn OFF GAS to Appliance Safety Shutoff Test For Standing Pilot Ignition System Operating Instructions Intermittent Pilot Spark Ignition System F9/M9 Safety Shutoff Test for Spark Ignition Pilot SystemFreeze Protection To Turn Off Gas to Appliance Freeze Protection for a Heating Boiler System if required Water Treatment Required Temperature Rise Required Temperature RiseDomestic water heaters Domestic Water Heaters 90,000 500,000 Btu/hr Models Pump Operation Water ChemistrySoftened Water Systems 1Single water heatersingle tank 2Single water heatermultiple tank 3Multiple water heatersingle tank Thermostat Settings Remote Sensor InstallationMinimum Pump Performance Heat Exchanger 5Danger Warning Pressure Only Relief Valve Water Flow Switch if equippedThermal Expansion Cathodic Protection Service technician Maintenance and annual startupOwner maintenance See the User’s Information Manual for instructions Maintenance Check Relief Valve Check Expansion Tank Check Control Settings Check All WiringCombustion Air Adjustment Perform Start-up and Checks Inspection and Cleaning Procedure Inspect and Clean BurnerHeat Exchanger / Burner Access Clear Area Pilot Flame Adjustment ProcedureInspection of Heat Exchanger Waterways Water Circulating Pump Gas Train and Controls Review with owner Troubleshooting Pilot or replace Schematic Diagram F1 Unit DiagramsWiring Diagram F1 Unit 90,000 270,000 Btu/hr Models 315,000 399,999 Btu/hr Models Schematic Diagram F9 UnitWiring Diagram F9 Unit Diagrams Diagrams Page Revision a ECO #C06290 initial release CFA-I-S Rev a 09/10