Lochinvar 51 operation manual 2Wiring Diagram

Page 76

Installation & Operation Manual

13 Diagrams

Figure 13-2Wiring Diagram

LOW VOLTAGE 120 VAC HIGH VOLTAGE

BOX DEPICTS

OPTIONAL ITEMS

BOX DEPICTS DUAL SENSOR SINGLE HOUSING

 

 

 

 

CONNECTION BOARD

 

 

ALARM

1

 

 

BELL JUMPER

CONTACTS

2

 

ALARMBELL

RUN-TIME

3

 

CONTACTS

4

 

24 VAC LOUVER

5

 

RELAY COIL

6

 

LOUVER

7

CN5-1

 

 

PROVING SWITCH

8

 

 

CN5-8

 

 

GAS PRESSURE

9

 

 

CN5-2

 

 

SWITCH

10

 

 

CN5-9

 

 

 

 

SWITCH

 

 

 

CN5-3

 

 

 

CN5-10

 

 

 

CN5-11

SILENCING

 

 

 

CN5-4

 

FLOW

11

CN5-5

 

SWITCH

12

CN5-14

 

TANK

13

CN5-12

 

 

THERMOSTAT

14

CN5-6

 

 

ROOM TSTAT

15

CN5-13

 

 

ZONE CONTROL 3

16

CN5-7

 

 

ROOM TSTAT

17

 

 

 

ZONE CONTROL 2

18

 

 

 

ROOM TSTAT

 

 

BK

BK

BK

BK

BK

BK BK

BK

BK

BK

BK

BK

BK

BK

INTEGRATED

CONTROL

 

X-7

 

 

X1-3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X1-4

 

 

 

 

 

 

 

 

 

 

 

 

X1-2

 

 

 

X4-7

 

 

 

 

 

 

 

 

 

 

X4-14

 

 

 

 

 

 

 

 

 

 

 

 

X4-6

 

 

 

 

 

 

 

 

 

 

 

 

X4-13

 

 

 

 

 

 

 

 

 

 

 

 

X4-5

 

 

 

 

 

 

 

 

 

 

 

 

X4-12

 

 

 

 

 

 

 

 

 

 

 

 

X4-11

 

 

 

 

 

 

 

 

 

 

 

 

X4-4

 

 

X1-6

 

 

 

 

 

 

 

 

X4-3

 

 

X1-5

 

 

 

 

 

 

 

 

X4-8

 

 

 

 

 

 

 

 

 

 

 

 

X4-10

 

 

 

 

 

 

 

 

 

 

 

 

X4-2

 

 

 

 

 

 

 

 

 

 

 

 

X4-9

 

 

X1-8

 

 

 

 

 

 

 

 

X4-1

 

 

X1-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR

BR

PR

BK

W

G

R

W

W

W

KB ONLY

ON/OFF

SWITCH

 

 

 

 

 

 

JUNCTION

BOX DEPICTS

OPTIONAL

BOX

 

ITEMS

 

 

 

 

 

 

L

DHW

G

PUMP

N

 

L

BOILER

G

PUMP

N

 

L

SYSTEM

G

N

PUMP

 

L

L

120V

N

GND

SUPPLY

N

ZONE CONTROL 1

19

 

 

 

20

 

 

 

SYSTEM

 

 

21

 

 

 

SENSOR

 

 

22

 

 

 

OUTDOOR

 

 

23

 

 

 

SENSOR

 

 

24

 

 

 

 

 

 

25

 

 

 

TANK

 

 

26

 

 

 

SENSOR

 

 

27

 

 

 

 

 

 

28

 

 

 

SHIELD

 

 

29

 

 

 

A

 

 

30

 

 

 

CASCADE

 

 

31

 

 

 

B

 

 

 

 

 

SHIELD

 

 

32

 

 

 

 

 

 

 

CN6

BMS

+

0-10V

33

 

 

 

IN

-

34

 

 

 

SYS PUMP

+

0-10V

35

 

 

 

IN

-

36

 

 

 

BLR PUMP

+

0-10V

37

 

 

 

OUT

-

38

 

 

 

RATE

+

0-10V

39

 

 

 

OUT

-

40

 

 

 

SHIELD

 

41

 

 

 

MODBUS

A

 

42

 

 

 

OPTION

B

 

43

 

 

 

SHIELD

 

44

 

 

 

LOW

 

24 VAC

CN7-1

 

 

 

WATER

 

 

CN7-2

CN8-3

CN8-2

CN8-1

 

 

CN7-3

CUT-OFF

 

 

 

COM

CN7-4

 

 

 

 

 

 

 

 

 

R BLG

TRANSFORMER

R W G

1 2 3

 

 

BLOWER

 

 

1 2 3 4 5

X5-7

R

 

X6

T

 

X5-16

 

X5-8

W

 

X5-15

BK

 

X5-9

Y

 

X5-1

BL

 

X5-2

O

 

X5-10

P

BLOCKED DRAIN

SWITCH

X5-11

O/BK

AIR PRESSURE

SWITCH

X5-4

R/BK

-T

OPERATING SENSOR S1a

X5-12

 

-T

GY

HIGH LIMIT SENSOR S1b

X5-6

 

-T

P/BK

INLET SENSOR S2

X5-5

 

-T

W/BK

FLUE SENSOR S3a

X5-13

PR

-T

FLUE SENSOR S3b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X5-14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X6-3

X6-2 X6-1 X6-4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X2-2

 

 

BK

 

 

 

 

 

 

 

GAS VALVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X4-1

 

 

 

 

O

 

 

 

 

X9-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

@24VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X2-1

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X5-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 B

76

Page 75 Page 77
Image 76
Page 75 Page 77
Contents Models 51 Contents When servicing boiler Please read before proceedingKnight Wall Mount Boiler How it works Stainless steel heat exchangerModels 51 Ratings Knight Wall Mount Boiler =B=R RatingInstallation must comply with Closet and alcove installationsDetermine boiler location Before locating the boiler, check1Closet Installation Minimum Required Clearances Provide air openings to room Vent and air pipingWall mounting location Prevent combustion air contaminationProducts to avoid When using an existing vent system to install a new boilerAreas likely to have contaminants When removing a boiler from existing common vent system Remove boiler from wood pallet Prepare boilerGas conversions Mounting the boiler Mounting to a concrete wallMounting to a metal studded wall Mounting to a wood studded wallGeneral venting Direct venting options Sidewall VentDirect venting options Vertical Vent Direct venting options Vertical Vent, Sidewall AirInstall vent and combustion air piping Requirements for installation in CanadaInstalling vent and air piping PVC/CPVC Vent piping materialsPVC/CPVC air intake/vent connections Air inlet pipe materialsApproved Stainless Steel Vent Manufacturers MakeStainless steel vent Boiler FlueBoiler Boiler Flue Intake Air AdapterStainless steel air intake/vent connections Removing from existing ventVent and air system Vent, air piping and terminationOptional room air Model Kit Number KIT30051 Air contaminationIf using the alternate sidewall termination Sidewall direct ventingVent/air termination sidewall Vent Size2AClearance to Gravity Air Inlets Prepare wall penetrations Prepare wall penetrations Alternate Field Supplied OptionTermination and fittings Multiple vent/air terminationsSidewall termination optional concentric vent Sidewall termination installationDescription and usage 8Concentric Vent Dimensional Drawing Sidewall termination optional concentric vent models10Concentric Vent Sidewall Attachment Multiventing sidewall terminationsVertical direct venting Vent/air termination verticalPrepare roof penetrations 2Vertical Terminations with Multiple BoilersVertical termination installation Vertical termination optional concentric ventMultiventing vertical terminations Minimum Combustion AIR TypicalAlternate vertical concentric venting Concentric Venting ArrangementExisting vent as a chase AIR Inlet Flue Exhaust Seal CAP Existing Flue OutletHydronic piping Near boiler piping components Near boiler piping connections Circulator sizingMinimum Pipe Pump Size Grundfos ModelArmstrong Variable speed pump setup Variable speed pump optionModel Grundfos UP26-96 FC/VS IFC VS Stratos 1.25 3 x3Single Boiler Single Temperature Zoned with Circulators Number of Units 5Single Boiler Multiple Temperatures Multiple Boilers Multiple Temperatures Model 8Single Boiler Zoned with Valves Model 10Single Boiler Non-Zoned Primary/Secondary Piping Connecting gas supply piping Gas connectionsNatural gas Propane GasCheck inlet gas supply Natural Gas Pipe Capacity ChartLength of Pipe in Straight Feet for 1/2 PSI Gas valve replacement Gas PressureField wiring Installation must comply withLine voltage connections Low voltage connectionsOutdoor temperature sensor Louver proving switchFlow switch ThermostatAlarm contacts Wiring of the cascadeSystem supply sensor Boiler management systemInstallation Condensate disposal Condensate drainFreeze protection when used Start-upCheck/control water chemistry Fill and test water systemClean/Inspect Trap Assembly Check for gas leaks Check thermostat circuitsInspect/fill condensate system Inspect/check condensate lines and fittingsFinal checks before starting the boiler Start the boilerIf boiler does not start correctly Check system and boiler2Operating Instructions Set space heating operation Natural Gas PropaneConfiguration of the cascade Verify DHW modeSet domestic hot water DHW operation Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if used CascadeSequence of operation Operation DisplayInstaller Access modesUser Knight wall mount boiler control module 1Control PanelCall for Heat Information Right Select no Service technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Check ignition ground wiring Check all boiler wiringCheck control settings Check expansion tankCheck flame signal Cleaning boiler heat exchangerReview with owner Oiled bearing circulatorsDiagrams PC Interface2Wiring Diagram Page Page

51 specifications

Lochinvar 51 is an innovative and robust residential boiler system designed for high-efficiency heating needs. A popular choice among homeowners, the Lochinvar 51 stands out in the market due to its advanced features and eco-friendly technologies.

One of the main features of Lochinvar 51 is its compact design, making it ideal for installation in limited space environments such as attics or closets. Despite its small footprint, it boasts a powerful heating capacity, suitable for varying home sizes. The boiler operates with a modulating gas burner that allows it to adjust its heat output according to the demand, ensuring efficiency and comfort throughout the day.

The Lochinvar 51 employs a cutting-edge heat exchanger made from stainless steel, which is highly durable and resistant to corrosion. This design not only enhances the boiler's performance but also increases its lifespan. The unit offers impressive AFUE (Annual Fuel Utilization Efficiency) ratings, showcasing its capability to convert a significant portion of fuel into usable heat, thus minimizing energy waste and reducing heating costs.

Technologically, the Lochinvar 51 is equipped with advanced control systems that facilitate precise temperature management. The intuitive interface allows homeowners to easily set their desired temperature and monitor the system’s performance. Additionally, the integration of outdoor reset technology helps optimize energy consumption by adjusting the water temperature based on outside weather conditions, leading to further energy savings.

Safety features are also paramount in the Lochinvar 51. It includes built-in safeguards that monitor pressure and temperature, automatically shutting down the system in case of any irregularities. This not only protects the boiler but also ensures peace of mind for users.

Moreover, Lochinvar 51 supports compatibility with smart home systems, providing homeowners with remote control capabilities via mobile devices. This innovative feature enhances user convenience, allowing for easy adjustments and monitoring of the heating system from anywhere.

In conclusion, the Lochinvar 51 is an exceptional choice for homeowners looking for a reliable, efficient, and technologically advanced heating solution. With its impressive heating capacity, durable design, and innovative control features, it sets a high standard in residential boiler performance, making it a top contender in today’s market.
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