Lochinvar 1, 000 through 2 warranty Ladder Diagram

Page 77

Ladder Diagram

1,500,000 - 1,300,000 - 2,000,000 Btu/hr Models

HOT

WARNING:To

avoid possible shock hazard, disconnect power before servicing.

NEUTRAL

POWER

 

SWITCH

2

 

 

C

N

7

NO

3

GROUND

UNIT POWER 120VAC 15AMP

 

 

 

GND

VFD

NO

G

COM

 

L1

 

 

L2

VFD POWER

 

 

RELAY

 

R

 

 

L1

 

 

T1 T2 T3

M

BLOWER ASSEMBLY

PUMP POWER 120VAC 15AMP

GROUND PUMP MOTOR

M COM NO

L2

S1

S2

IGNITION MODULE

 

OPTIONAL

NO

VENT VALVE

 

 

HOT

COM

 

 

 

SURFACE

 

EXT. GAS VALVE

1

2

IGNITER

 

CONTROLLER HSI

 

 

 

COM

NO

 

 

 

 

 

120

 

 

120VAC GAS VALVE

 

VAC

 

 

 

LOW VOLTAGE

GROUND

TRANSFORMER

 

LV1

COMMAND DISPLAY

EBUS EBUS

24 VAC LV2

GAS VALVE RELAY

 

R

TO

EARTH 24VAC

24VAC

 

OVERRIDE

 

 

Back

Select

TOGGLE

 

 

 

SWITCH

 

 

 

 

GROUND

 

 

7

8

9

CONTROLLER INPUTS

4

5

6

2

3

 

 

1

R

1

2

3

PUMP RELAY

CONTROLLER OUTPUTS

 

COMMUNICATION CABLE #1

IGNITION

RESET

24VAC SOLENOID VALVE

 

 

IGNITION

 

 

MODULE

F2

 

 

 

 

F1

11

N/A

-

+

10

TH

9

PI

 

8

LV2

 

7

RESET

 

T

T

TEST

 

SWITCH

 

~~~~

 

~~~~~~~~

O.C.

 

J1

LWCO

24 VAC

PROBE

 

LWCO

 

RESET J2

24 VAC

BL

Y

T

 

6

3

5

2

4

1

 

O/BK

FLOW SWITCH

NO C

OPTIONAL

Low

High

Gas

Gas

NC

NO

C

C

 

NC

NO

 

 

AIR

Blocked

 

Drain

SWITCH

NO

C

NO

C

 

 

 

NC

NC

 

 

OPTIONAL Louver

Proving Sw NO C

NC

6

LV1

 

 

 

5

MV

 

 

 

4

PS

 

 

 

3

FF

 

 

 

2

M/S

 

 

 

1

FF

 

 

 

 

3

2

1

CONTROLLER

 

VFD

 

R

 

 

 

 

 

 

1

2

3

P

 

GND

PU

 

G

 

 

PU

NC

CONTROLLER

 

 

 

 

 

INPUTS

1

2

3

4

5

LOUVER RELAY

PU

O

 

 

 

 

CHASSIS

 

 

 

 

RESET

GROUND

 

STD.

ALARM

 

 

COM

 

 

 

 

CONTACTS

 

COM

NO

 

 

ALARM

 

 

NO

 

 

INDICATOR

HI-LIMIT

COM

 

 

 

 

 

 

 

 

 

 

 

 

STD.

OVER TEMP

INDICATOR

COM

NO

LOUVER

 

STD.

RELAY

 

 

CONTACTS

 

REAR

 

 

COMMUNICATION

 

CABLE CONNECTION

NO

SILENCE SWITCH

 

ALARM 24VAC OUT

NC

COM

 

NC

COM

 

R

ALARM RELAY

R

IGNITION RELAY

1

2

3

1

2

3

R

CONTROL PANEL

HI-LIMIT ALARM

COMMUNICATION

RELAY

CABLE CONNECTION

 

BYPASS

VALVE

1

2

CONTROLLER 24VAC

 

 

 

 

DIP SWITCH #5 ON

 

 

 

 

 

 

OVER- RIDE

MANUA L

XUM

 

EM TI

 

 

 

 

 

 

 

 

RADD

 

ES A B DEOM

-

+

rw P

moC

tOu

tuO

 

 

 

 

 

GI S

GI S

V42

Am

stloV

 

 

 

 

 

SIGIN-

SIGIN+

24VPwr

Com

mAOut

VoltsOut

CALIBRATED .

 

 

 

 

 

 

NOTICE:

 

 

 

 

 

 

 

FACTORY

PWM

 

 

DO NOT

 

 

ADJUST .

CONV.

 

 

 

 

 

 

 

 

 

 

 

RUN

8888

VOLTS

 

 

 

 

 

FWD

AMPS

 

 

 

 

 

REV

 

 

HERTZ

 

 

 

 

DIP SWITCH IN

01

02

 

 

 

 

 

 

DOWN

 

 

 

 

 

 

 

POSITION

 

 

 

 

 

 

 

 

 

 

 

11

 

14

15

 

 

 

 

L1

L2

 

T1

T2

T3

7 8 9

4

5

6

 

PUMP

 

 

OUTPUTS

1

2

3

3

2

1

VFD

 

 

 

ENABLE

 

ENABLE

 

1

2

24VAC

 

 

 

 

HSI

 

 

1

2

 

 

INPUTS

 

3

2

1

GAS

 

 

FLOW

ON

 

 

 

 

 

 

FLAME

 

FAILURE

16

 

8

OUT

 

CONTROLLER

JACK J3

 

 

 

 

CABLE #2

 

 

 

 

BUS-E

 

 

 

 

 

 

 

 

 

PWM/4-20ma

 

 

 

 

 

 

COMMUNICATION

1718

 

67

OUTOUT

 

 

BUS-E

1514

 

 

 

 

 

 

 

n/a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dial Alarm

 

 

 

 

 

 

 

INPUTS

 

19

 

5

OUT

 

Float Close

Hi-LoGas/

22VDC

OUT

13

 

 

 

1

BLK DRAIN

20

 

4

OUT

 

Float Open

A1-6

V/ma

12

 

 

 

1

 

 

Louver

 

 

 

 

LO AIR

 

 

 

 

 

 

 

 

 

 

 

 

21

 

 

OUT

 

Ignition Enable

GND

11

 

 

 

2

 

3

 

 

 

 

 

 

 

 

 

 

 

 

LOUVER

 

 

 

 

 

 

 

 

 

 

 

 

 

22

 

2

OUT

 

n/a

LowAir/Block Drain

A1-5

V/ma

10

 

 

 

3

 

 

 

 

 

4

GAS HI/LO

 

 

 

 

 

 

 

 

 

 

 

23

 

1

OUT

 

Pump Relay

OA Sensor

A1-4

OHM

9

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24

24

VAC COM

 

 

 

 

GND

8

 

3

2

BYPASS SENSOR

25

24

VAC

 

Bypass Water Sensor

A1-3

OHM

7

 

2

26

 

 

DI-1

HSI

Outlet Water Sensor

A1-2

OHM

6

BYPASS

1

1

1

OA SENSOR

 

 

SENSOR

1

 

 

 

GND

 

 

 

 

GND

 

 

OA

 

2 7

 

 

 

 

 

5

1 2

1

SENSOR

OPTIONAL

28

 

 

DI-2

Gas Valve

Inlet Water Sensor

A1-1

OHM

4

2

1 2

 

 

 

 

 

 

 

 

 

 

 

 

 

29

 

 

DI-3

Low Wtr Flow

 

S/S

 

 

3

1

 

1

1

OUTLET

30

 

 

GND

 

 

 

LED

 

 

2

ENABLE

INLET

OUTLET

 

 

 

 

 

 

 

SENSOR

 

 

 

 

 

 

 

 

31

 

 

DI-4

Flame Failure

 

 

 

GND

1

SWITCH

SENSOR

SENSOR

 

 

 

 

E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G BK

BK

INLET SENSOR

 

 

 

 

 

 

 

 

 

 

CHASSIS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OVERRIDE TOGGLE SWITCH

GROUND

 

 

 

 

 

 

 

 

 

RUN/STOP SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TO PUMP

 

 

 

 

 

 

 

 

 

 

 

 

 

RELAY COIL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPTIONAL:

 

 

 

 

 

 

 

 

 

 

 

 

50 Hz Limit Resistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.2K Ohm

 

 

 

 

 

LBL20021 REV B

77

Page 76 Page 78
Image 77
Page 76 Page 78
Contents
IFB/IFW-i&s-05 WarrantySpecial Instructions To Owner Table of Contents Do not Checking EquipmentWhat to do if YOU Smell GAS Owner WarningRecommended Service Clearances Installation Procedure Location of UnitTable a Clearances from Combustible ConstructionCombustion Air Direct from Outside Minimum Recommended Combustion Table BAIR Supply to Mechanical Room 500 in2 3226 cm2 667 in2 4303 cm2 000 in2 12,903 cm2Construction Air Filter Construction AIR FilterVenting Construction AIR Filter Kits Table CTable D Category IV Flue Pipe SizesCategory IV Venting Category IV Positive Pressure Venting SystemCategory IV Flue Pipe Materials Venting Guidelines for a Category IV VentExceed a maximum of 100 equivalent feet 30.5 m in length Drain Tee InstallationGeneral Category IV Vent Termination Clearances Vertical Venting Terminations Masonry Chimney InstallationsTable E Sidewall Venting TerminationsSidewall Vent Cap Kits Sidewall VentDirect Vent INTELLI-VENT Systems Location of a Sidewall Vent TerminationDirect Vent and Intelli-Vent Flue Air Inlet Pipe Sizes Table FAir Inlet Length of Air Inlet PipeCombined Combustion Air Inlet Points Vertical Direct Vent SystemsHorizontal Direct Vent Multiple Vertical Direct Vent InstallationsLocation of a Sidewall Air Inlet Cap Sidewall Combustion AIR InletTable G These are Multiple Horizontal Direct Vent InstallationsCombined Air Inlet Points Table HMaximum Length of an Intelli-Vent System Air Inlet Sidewall Input Flue Pipe Btu/hr SizeAir Inlet Sidewall Input Flue Pipe Horizontal INTELLI-VENT with Vertical Combustion AIRBtu/hr Size Cap Kit 500,000 SVK3026Location of a Rooftop Air Inlet Cap Vertical Combustion Horizontal INTELLI-VENT AIR InletTable J Table K GAS Supply GAS Pressure TestGAS Connection Table LMultiple Appliance Installations Gas Pipe Size Chart Recommended Gas Pipe Size Single Appliance InstallationsTable M Table NInstall Piping to Control GAS Manifold Pressure AdjustmentGAS Piping Checking GAS Supply PressureChecking Manifold GAS Pressure Water Connections Water ConnectionsMinimum Pipe Size Requirements Secondary Heat Exchanger Primary Heat ExchangerInlet and Outlet Connections Bypass Valve Synchronization Integral BypassIntegral Circulator Bypass Piping AssemblyOptional Intermittent Pump Operation Bypass Initial Set-up of Maximum Water FlowBtu/hr Input Temperature Rise Minimum Water TemperaturesTable P Bypass OperationTable Q Water Flow SwitchLOW Water Cutoff GAS Train and ControlsDiaphragm GAS Valve Ratio GAS Valve Relief ValveElectrical Connections Jacket AssemblyFront Control Panel Locations Access to Components and ControlsTransformer and Relay Locations Variable Frequency DriveExcel High GAS Pressure Switch LOW GAS Pressure Switch OptionalLOW AIR Pressure Switch Be used as a diagnostic indicator Default Values Pre-programmed in the Excel Temperature AdjustmentTable S To Activate the Manual OverrideConfiguring Command Display Password FunctionTable T Display Default Values Accessing the SIX Changeable Points from Command DisplayTotal Run Time Calculated Set PointSet Point Temp Sequencing TypeCommand Display Data Screen Table U Status PointsStatus Point Operational Modes Hot Surface Igniter OnOptional on Heating Boilers Only Outdoor Reset Function SelectionsEfficiency Optimized with Time Equalization Multiple Appliance InstallationsTable W Singly Terminated FTT Network Bus Topology SpecificationsInterfacing Multiple Appliances Additional Components Used to Interface Multiple Appliances Wire Termination for E-Bus ConnectionTypical Building Management System Diagram High Water Temperature Limit ControlIgnition Module Lockout Functions Service PartsHOT Surface Ignition System Table Y Diagnostic Status IndicationIgnition and Control Timings Table ZIndicator OPERATION/DIAGNOSTIC LIGHTS, Resets and SwitchesBurner Table AACombustion Air Blower and Transition Chamber Combustion AIR BlowerSystem Optional Condensate ManagementTable BB Condensate Drain Location On RearReplenishing the Neutralizer Condensate TestingCondensate Trap Installation Lighting Instructions Install Condensate TrapIgnition System Checkout To Turn OFF GAS to ApplianceHeat Transfer Process Sequence of OperationEnd of Sequence MaintenanceBurner Maintenance Burner Removal and CleaningLocation of Primary Heat Exchanger Burner Cleaning ProcedureSecondary Heat Exchanger Inspection Lubrication Freeze Protection Freeze Protection for a Heating Boiler System If Required Heating Boiler InstallationsWater Treatment Water Connections Heating Boilers onlyPiping Lengths Primary Loop Circulator Pump SpecificationsBoiler Circulator Pump Limitations Circulator Pump OperationPRIMARY/SECONDARY Boiler Piping Minimum Boiler Water TemperaturesTable CC Boiler Temperature Rise Chart Table DDMaximum Flow for Heating Boiler Btu/hr Input Maximum FlowPlacing the Boiler Operation TEMPERATURE/PRESSURE GaugeTypical Heating Boiler Installations Boiler Operation Installation with a Chilled Water SystemBoiler Operating Temperature Control Typical Water Heater Piping with Storage Tank Water Velocity ControlMaximum Flow Rate Btu/hr Input Table EETable FF Water Chemistry Single Water Heater Piping with Two Storage Tanks Piping Multiple Unit InstallationsPump Operation Table GGHeat Exchanger Common ManifoldTable HH Thermostat SettingsCathodic Protection Optional Relief ValveThermal Expansion Ladder Diagram PWM Wiring Diagram
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