Lochinvar 81 - 286 operation manual 2Wiring Diagram

Page 78

Installation & Operation Manual

13 Diagrams

Figure 13-2Wiring Diagram

ALARM BELL

BELL JUMPER

SILENCING SWITCH

 

 

 

 

 

LOW VOLTAGE

BOX DEPICTS

 

 

 

 

 

 

 

120 VAC

 

 

 

 

 

 

 

 

 

OPTIONAL ITEMS

 

 

 

 

 

 

 

 

HIGH VOLTAGE

 

BOX DEPICTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DUAL SENSOR

 

 

 

 

 

 

 

 

 

 

SINGLE HOUSING

 

 

 

 

 

 

 

CONNECTION BOARD

 

INTEGRATED

 

 

 

BOX DEPICTS

 

 

 

 

CONTROL

 

JUNCTION

 

 

 

 

 

 

 

 

OPTIONAL

 

 

 

 

 

 

 

 

BOX

 

 

ITEMS

ALARM

1

 

 

X-7

X1-3

OR

L

 

 

 

CONTACTS

2

 

 

G

 

DHW

 

 

 

 

 

 

 

RUN-TIME

3

 

 

 

 

 

N

 

PUMP

 

 

 

 

W

 

 

CONTACTS

4

 

 

 

 

 

 

 

 

 

 

X1-4

BR

L

 

 

 

24 VAC LOUVER

5

 

 

 

G

 

BOILER

 

 

 

 

 

 

 

RELAY COIL

6

 

 

 

 

W

N

 

 

PUMP

LOUVER

7

 

 

 

 

 

 

 

CN5-1

BK

X4-7

X1-2

PR

L

 

 

 

PROVING SWITCH

8

G

 

SYSTEM

CN5-8

BK

X4-14

 

 

 

 

GAS PRESSURE

9

 

W

N

 

 

PUMP

CN5-2

BK

X4-6

 

 

 

 

SWITCH

10

 

 

 

 

CN5-9

BK

X4-13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN5-3

BK

X4-5

 

KB ONLY

 

 

 

 

 

 

 

CN5-10

BK

X4-12

 

ON/OFF

 

 

 

 

 

 

 

CN5-11

BK

X4-11

 

SWITCH

 

 

L

120V

 

 

 

CN5-4

BK

X4-4

X1-6

BK

L

 

FLOW

11

CN5-5

BK

X4-3

X1-5

W

N

GND

SUPPLY

 

N

SWITCH

12

CN5-14

BK

X4-8

 

 

 

 

 

 

TANK

13

CN5-12

BK

X4-10

 

 

 

 

 

 

THERMOSTAT

14

CN5-6

BK

X4-2

 

 

 

 

 

 

HEAT/LOOP

1

15

CN5-13

BK

X4-9

X1-8

G

 

 

 

 

DEMAND

16

CN5-7

BK

X4-1

X1-1

 

 

 

 

 

HEAT/LOOP

2

17

 

 

 

R

 

 

 

 

DEMAND

18

 

 

 

 

 

 

 

 

 

HEAT/LOOP

3

19

 

 

 

 

 

TRANSFORMER

 

 

DEMAND

20

 

 

 

 

 

 

 

 

 

SYSTEM

 

 

21

 

 

R W G

 

SENSOR

 

 

22

 

 

1 2 3

 

OUTDOOR

 

 

23

 

 

 

 

 

 

 

 

 

SENSOR

 

 

24

 

 

 

 

 

 

 

25

 

 

BLOWER

 

TANK

 

 

26

 

 

 

SENSOR

 

 

27

 

 

 

 

 

 

 

28

 

 

1 2 3 4 5

 

SHIELD

 

 

29

 

 

 

 

 

 

 

 

 

A

 

 

30

 

 

 

 

CASCADE

 

 

31

 

 

 

 

B

 

 

 

 

 

 

SHIELD

 

 

32

 

 

 

 

 

 

 

CN6

X5-7

R

 

 

 

 

 

X6

T

 

 

 

 

 

 

X5-16

 

 

BMS

+

 

33

X5-8

W

 

 

0-10V

 

 

 

 

IN

-

34

X5-15

BK

 

 

SYS PUMP

+

0-10V

35

X5-9

Y

 

 

IN

-

36

 

 

 

 

BLR PUMP

+

0-10V

37

X5-1

BL

 

 

OUT

-

38

X5-2

O

 

KB 286 ONLY

RATE

+

0-10V

39

 

 

 

P BLOCKED DRAIN SWITCH

O-TEMP HEX SW

OUT

-

40

X5-10

 

SHIELD

 

41

X5-11

 

AIR PRESSURE SWITCH

 

MODBUS

A

 

42

O/BK

-T

 

OPTION

B

 

43

X5-4

R/BK

 

 

OPERATING SENSOR S1a

SHIELD

 

44

 

 

 

-T

 

 

24 VAC

CN7-1

 

X5-12

GY

HIGH LIMIT SENSOR S1b

LOW

 

X5-6

P/BK

-T

CUT-OFF

COM

CN7-2

CN8-1 CN8-2 CN8-3

INLET SENSOR S2

CN7-4

X5-5

W/BK

FLUE SENSOR S3a

WATER

 

CN7-3

 

 

 

-T

 

 

 

 

 

 

 

 

 

X5-13

PR

-T

 

 

 

R BLG

FLUE SENSOR S3b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X5-14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X6-3

X6-2 X6-1 X6-4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X2-2

 

 

BK

 

 

 

 

 

 

 

GAS VALVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X4-1

 

 

 

 

O

 

 

 

 

X9-1

 

X2-1

 

 

 

 

 

 

 

 

 

 

 

 

 

@24VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X4-2

 

 

 

 

 

X9-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODBUS BOARD

 

 

 

 

X4-3

 

 

 

 

G

 

 

 

X9-3

 

X1-7

 

W/R

 

 

FLAME SENSOR

G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X4-4

 

 

 

 

 

 

 

 

 

 

X9-4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MTR-01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TR2

 

 

 

 

 

 

 

 

 

SPARK

 

 

 

 

 

 

 

 

 

 

 

SHIELD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ROD

 

 

 

 

 

 

 

 

 

 

 

GROUNDING

 

 

 

 

 

 

 

 

 

X5-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X5-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

HIGH VOLTAGE SPARK LEAD

 

 

 

 

 

 

JUMPER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X1-1

 

 

 

BK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X1-2

 

 

 

 

W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X1-3

 

 

 

 

G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Notes:

1.All wiring must be installed in accordance with: local, state, provincial and national code requirements per either N.E.C. in USA or C.S.A. in Canada.

2.If any original equipment wire as supplied with the appliance must be replaced, it must be replaced with wire having same wire gauge (AWG) and rated for a minimum of 105°C. Exceptions: Replacement high vo ltage spark lead and ribbon cables must be purchased from the factory. Use of a non-approved spark lead or ribbon cables can lead to operational problems which could result in non-repairable damage to the integrated controller or other components.

3. Actual connector block locations may vary from those shown on diagrams. Refer to actual components for proper connector block locations when using

WIRING DIAGRAM

diagrams to troubleshoot unit.

LBL20127 REV C

78

Image 78
Contents Models 81 Contents When servicing boiler Please read before proceedingKnight Boiler How it works Stainless steel heat exchangerModels 81 Model Ratings Knight Boiler =B=R RatingDetermine boiler location Installation must comply withCloset and alcove installations Before locating the boiler, check1Closet Installation Minimum Required Clearances Vent and air piping Residential garage installationProvide air openings to room Flooring and foundationWhen using an existing vent system to install a new boiler Products to avoidAreas likely to have contaminants When removing a boiler from existing common vent system Gas conversions Prepare boilerRemove boiler from wood pallet Leveling the boilerGeneral venting Direct venting options Sidewall VentDirect venting options Vertical Vent Direct venting options Vertical Vent, Sidewall AirInstalling vent and air piping Install vent and combustion air pipingRequirements for installation in Canada PVC/CPVC vent piping materialsPVC/CPVC air intake/vent connections Vent Pipe, and FittingsAir inlet pipe materials Stainless steel ventBoiler Flue BoilerBoiler Flue Intake Air Adapter Termination Optional room air LengthRemoving from existing vent Vent/air termination sidewall If using the alternate sidewall terminationSidewall direct venting Determine location2AClearance to Gravity Air Inlets Prepare wall penetrations Alternate Field Supplied Option Prepare wall penetrationsTermination and fittings Multiple vent/air terminationsSidewall termination installation Sidewall termination optional concentric ventDescription and usage 10 Concentric 12Concentric Vent Sidewall Attachment Multiventing sidewall terminationsVertical direct venting Vent/air termination verticalPrepare roof penetrations Multiple vent/air terminations 2Vertical Terminations with Multiple BoilersVertical termination installation Vertical termination optional concentric vent6Concentric Vent Roof Installation Multiventing vertical terminationsAlternate vertical concentric venting Concentric Venting ArrangementExisting vent as a chase 10Existing Vent as a ChaseHydronic piping Near boiler piping components Indirect water heaters Near boiler piping connectionsCirculator sizing StrainerModel FeetPressure Minimum Pipe Pump Size GrundfosVariable speed pump setup Variable speed pump optionUP26-96 FC/VS IFC VS Stratos 1.25 3 x 4Single Boiler Single Temperature Zoned with Circulators Number of Units 6Single Boiler Multiple Temperatures Number of Units Model Required Pipe Sizes MAY Substitute Number of Units Model 10Multiple Boilers Non-Zoned Primary/Secondary Piping Connecting gas supply piping Gas connectionsNatural gas Propane GasSingle Unit Natural Gas Pipe Capacity Chart Check inlet gas supplyLength of Pipe in Straight Feet for 1/2 PSI Gas valve replacement Gas PressureLine voltage connections Field wiringInstallation must comply with Low voltage connectionsHigh gas pressure switch Outdoor temperature sensorLouver proving switch Low gas pressure switchWiring of the cascade Flow switchAlarm contacts ModBusManual Condensate disposal Condensate drainCheck/control water chemistry Freeze protection when usedStart-up Fill and test water systemInspect/fill condensate system Check for gas leaksCheck thermostat circuits Inspect/check condensate lines and fittingsIf boiler does not start correctly Final checks before starting the boilerStart the boiler Check system and boiler2Operating Instructions Set space heating operation Natural Gas PropaneVerify DHW mode Configuration of the cascadeSet domestic hot water DHW operation Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if used CascadeSequence of operation Operation DisplayStandby, ready to start a new cycle Knight boiler control module Navigation DialAccess modes InstallerUser Call for Heat Information Dial Function Owner maintenance Maintenance Maintenance and annual startupService technician See the Knight User’s Information Manual for InstructionsCheck water system MaintenanceFlue vent system and air piping Check expansion tankInspect boiler area Address reported problemsClean condensate trap Inspect boiler interiorCheck control settings Check ignition ground wiringCheck all boiler wiring Check flame signalOiled bearing circulators Cleaning boiler heat exchangerReview with owner Kit Part Component Number DescriptionDiagrams PC Interface2Wiring Diagram
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Manual 16 pages 57.5 Kb

81 - 286 specifications

Lochinvar 81 - 286 is a state-of-the-art boiler recognized for its efficiency and reliability in both residential and commercial applications. This high-performance heating solution is designed to meet the diverse needs of users while adhering to modern environmental standards.

One of the standout features of the Lochinvar 81 - 286 is its advanced condensing technology. This allows the unit to harness more heat from the combustion gases, significantly boosting its thermal efficiency. With an impressive efficiency rating of over 95%, users can expect lower energy bills and reduced carbon emissions, making this boiler an environmentally friendly choice.

The Lochinvar 81 - 286 incorporates a robust stainless steel heat exchanger that guarantees durability and longevity. This corrosion-resistant material not only prolongs the unit's life but also ensures consistent performance over time. Additionally, the heat exchanger’s design facilitates optimal heat transfer, further enhancing the boiler's efficiency.

In terms of control, the Lochinvar 81 - 286 features a user-friendly control interface that simplifies operation. The boiler is equipped with advanced modulation capabilities, allowing it to adjust its output based on real-time heating demands. This responsiveness reduces energy waste and optimizes comfort levels within the space it serves.

The boiler also supports a variety of installation configurations, providing flexibility for different building layouts. Its compact design allows for easy installation in restricted spaces, while versatile venting options facilitate integration into various systems.

Safety is a paramount consideration in the design of the Lochinvar 81 - 286. The unit comes with integrated safety features such as a built-in diagnostic system that alerts users to any potential issues before they escalate. This proactive technology helps in maintaining seamless operation and reducing downtime.

Finally, the Lochinvar 81 - 286 is compliant with the latest regulations and industry standards, ensuring that it meets the expectations of both consumers and environmental agencies. With its impressive combination of efficiency, durability, and advanced technology, the Lochinvar 81 - 286 stands out as a top choice for anyone seeking a high-performance heating solution. This boiler not only addresses the immediate needs of heating but also supports long-term sustainability initiatives, proving to be a wise investment for the future.