Lochinvar 51 operation manual Diagrams, PC Interface

Models: 51

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Installation & Operation Manual

13 Diagrams

Figure 13-1Ladder Diagram

120VAC

 

JUNCTION BOX

 

 

 

 

 

NEUTRAL GROUND

TERMINAL STRIP

 

 

 

 

 

 

TERMINAL STRIP

120V SUPPLY "L"

 

 

 

 

 

 

120V SUPPLY "N"

 

 

 

 

 

 

 

1

2

ON / OFF

INTEGRATED CONTROL

 

 

 

GND

BLOWER

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X1-6

F2

 

X1-1

SYSTEM

 

SYSTEM

 

3

 

 

 

X1-2

PUMP "L"

 

PUMP "N"

 

 

 

3.15A

 

 

 

 

 

 

 

 

F1

 

 

 

SYSTEM

GND

 

 

 

 

 

 

BOILER

PUMP

BOILER

 

 

 

5A

SYSTEM PUMP

 

 

 

 

 

X1-4

PUMP "L"

 

PUMP "N"

 

 

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOILER PUMP

 

 

BOILER

GND

 

 

 

 

RELAY

 

 

PUMP

 

 

 

 

 

 

 

DHW

DHW

 

 

 

 

 

 

 

 

 

 

 

DHW PUMP

X1-3

PUMP "L"

 

PUMP "N"

 

 

 

F3

RELAY

 

 

 

 

 

 

 

 

 

 

TERMINAL

 

TERMINAL

 

 

 

.8A

24V DC

 

STRIP

DHW

STRIP

 

 

X5-9

 

SUPPLY

X5-1

 

PUMP

 

 

 

 

 

 

 

 

 

 

 

120 VAC

 

 

 

 

 

 

 

X4-3

24 VAC

 

 

 

 

 

 

 

3.5A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KB 801 ONLY

 

 

 

CONNECTION BOARD

 

INTEGRATED

 

 

 

 

 

 

CN5-5

 

 

 

 

 

 

 

CONTROL

 

 

 

 

FLOW

 

CN5-14

X4-8

 

LWCO

 

 

 

 

 

 

 

 

 

 

 

 

CN7-1

 

CN7-4

 

11

SWITCH

 

12

 

 

 

 

 

 

 

 

CN5-10

X4-12

CN7-3

 

CN7-2

 

 

 

 

 

 

 

 

 

CONNECTION BOARD

 

 

 

 

 

 

 

 

 

 

ROOM

 

 

 

 

 

 

 

 

 

THERMOSTAT 1

 

 

 

CN5-7

X4-1

 

 

 

 

 

 

 

 

 

 

 

 

 

19

 

 

 

20

 

 

 

 

 

 

ROOM

 

 

 

 

 

 

 

 

 

THERMOSTAT 2

 

 

 

CN5-13 X4-9

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

 

 

18

 

 

 

 

 

 

ROOM

 

 

 

 

 

 

 

 

 

THERMOSTAT 3

 

 

 

CN5-6 X4-2

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

16

 

 

 

 

 

 

TANK

 

 

 

 

 

 

 

 

 

THERMOSTAT

 

 

 

CN5-12 X4-10

 

 

 

 

 

 

 

 

 

 

 

 

 

13

 

 

 

14

 

 

 

 

 

 

LOW GAS

HIGH GAS

 

 

 

 

 

 

 

 

 

PRESSURE

PRESSURE

 

 

 

 

 

 

 

 

 

SWITCH

SWITCH

 

 

 

CN5-11 X4-11

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

9

CN5-3

X4-5

 

 

 

 

INTEGRATED

 

 

 

 

 

 

 

 

LOUVER

 

 

 

 

 

 

 

 

 

CONTROL

 

 

5

 

 

 

 

 

 

 

RELAY COIL

 

 

 

 

 

 

 

 

 

24VAC

 

 

6

 

 

 

 

 

 

 

LOUVER

 

 

7

 

 

 

 

 

 

 

PROVING SWITCH

CN5-4

X4-4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X7

 

 

 

8

 

 

 

 

 

 

RIBBON CABLE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X5-2

 

PC INTERFACE

 

 

 

 

BLOCKED

X5-10

 

 

 

 

X5-6

 

DRAIN SWITCH

 

 

 

 

 

INLET

S2

 

 

 

 

 

 

ALARM

BELL

1

SENSOR

 

 

 

 

 

 

 

 

X5-4

 

AIR PRESSURE

X5-11

 

 

 

OPERATING

S1a

 

 

SWITCH

 

 

 

SENSOR

 

 

 

 

 

 

 

 

 

 

 

X5-12

 

GAS VALVE

 

 

 

 

 

HIGH LIMIT

S1b

 

X2-2

 

 

 

 

SENSOR

 

 

 

 

 

 

2

6

FLUE SENSOR

S3a

X5-5

X5-13

 

GAS VALVE

X2-1

RELAY

FLUE

S3b

SENSOR

X5-14

13

CONNECTION

BOARD

BLOWER

1

X5-7

 

2

X5-16

 

ALARM

1

 

CN5-1

 

X4-7

 

 

 

 

 

 

 

CONTACTS

2

 

CN5-8

 

X4-14

 

 

 

 

 

 

 

 

 

 

 

 

3

 

CN5-2

 

X4-6

 

 

RUN-TIME

 

 

 

 

 

CONTACTS

4

 

CN5-9

 

X4-13

 

 

 

 

 

 

 

 

 

SYSTEM

S6

21

 

CN6

 

X6

 

 

 

 

 

 

SENSOR

 

22

 

CN6

 

X6

 

 

 

 

 

 

 

OUTDOOR

S5

23

 

CN6

 

X6

 

 

 

 

 

 

SENSOR

 

24

 

 

 

 

 

TANK

S4

26

 

CN3-9

 

X4-9

 

SENSOR

 

27

 

CN3-6

 

X4-6

 

 

 

 

 

 

 

 

 

SHIELD

 

29

 

 

 

 

 

 

A

 

30

 

CN6

 

X6

 

CASCADE

 

 

 

 

 

 

B

 

31

 

CN6

 

X6

 

 

 

 

 

 

 

 

SHIELD

 

32

 

CN6

 

X6

 

 

 

 

 

 

 

BMS +

 

33

 

CN6

 

X6

 

0-10V

 

 

 

 

 

IN -

34

 

CN6

 

X6

 

 

 

 

 

 

 

CN6

 

 

 

SYS PUMP

+

 

35

 

 

X6

 

0-10V

 

 

 

 

 

IN

-

36

 

CN6

 

X6

 

 

 

 

 

BLR PUMP

+

 

37

 

CN6

 

X6

 

0-10V

 

 

 

 

 

OUT -

38

 

CN6

 

X6

 

 

 

 

 

 

 

 

 

 

 

RATE

+

 

39

 

CN6

 

X6

 

0-10V

 

 

 

 

 

OUT

-

40

 

 

 

 

 

 

 

 

M

 

 

SHIELD

 

41

 

 

 

 

 

A

 

42

CN8-1

X6-1

O

X4-1

X9-2

 

 

D

MODBUS B

 

43

CN8-2

X6-2

B

X4-2

X9-1

SHIELD

 

44

CN8-3

X6-3

U

X4-3

X9-3

 

 

 

S

 

 

 

 

 

 

 

 

 

 

4 X5-8

5 X5-15

TR2

X1-7

FLAME ROD

SPARK

ROD

CAUTION HIGH VOLTAGE SPARK LEAD

NOTES:

1.Where possible, switches are shown without utilities (gas, water or electricity) connected to the unit. As such, actual switch states may vary from those shown on diagrams depending upon whether utilities are connected or a fault condition is present.

2.See wiring diagram for additional notes.

BOX DEPICTS

OPTIONAL ITEMS

LOW VOLTAGE 120 VAC HIGH VOLTAGE

LADDER DIAGRAM

LBL20148 REV B

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Lochinvar 51 operation manual Diagrams, PC Interface

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.