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

KB ONLY

ON / OFF

INTEGRATED CONTROL

 

 

 

GND

BLOWER

 

 

 

 

 

 

 

 

SWITCH

 

 

 

SYSTEM

 

SYSTEM

 

 

 

X1-6

F2

 

X1-1

 

 

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

 

 

 

HEAT/LOOPDEMAND 1

 

 

 

 

 

 

 

 

 

 

 

 

CN5-7

X4-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19

20

 

 

 

 

 

 

 

 

 

 

HEAT/LOOPDEMAND 2

 

CN5-13 X4-9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

18

 

 

 

 

 

 

 

 

 

 

HEAT/LOOPDEMAND 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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KB 286 ONLY

 

 

X5-2

 

 

 

 

 

 

 

 

 

 

 

 

 

PC INTERFACE

 

 

 

 

 

 

O-TEMP HEX SW

BLOCKED

 

X5-10

 

 

 

 

 

 

X5-6

 

DRAIN SWITCH

 

 

 

S2

 

 

 

 

 

 

 

 

INLET

 

 

 

 

 

 

 

 

 

ALARM BELL

1

SENSOR

 

 

 

 

 

AIR PRESSURE

 

 

 

 

 

 

 

X5-4

 

 

X5-11

 

 

OPERATING

S1a

 

 

 

SWITCH

 

 

 

SENSOR

 

 

 

 

 

 

 

 

 

 

 

 

HIGH LIMIT

S1b

 

 

X5-12

 

GAS VALVE

 

 

 

 

 

 

 

 

 

 

X2-2

 

 

2

SENSOR

 

 

 

 

 

 

 

 

 

SILENCING SWITCH

 

S3a

 

 

X5-5

 

 

 

 

 

GAS VALVE

 

FLUE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

SENSOR

 

 

 

 

 

 

 

 

X2-1

RELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X5-13

 

 

 

 

 

 

S3b

 

 

 

 

 

 

 

 

 

 

FLUE

 

 

 

 

 

 

 

 

 

 

 

SENSOR

 

 

 

X5-14

 

BLOWER

 

 

 

 

13

CONNECTION

 

 

 

 

 

 

 

1

X5-7

 

 

 

 

 

 

 

 

 

 

 

 

BOARD

 

 

 

 

 

 

 

 

2

X5-16

 

 

 

 

 

 

 

 

 

 

 

ALARM

1

 

CN5-1

 

X4-7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTACTS

2

 

CN5-8

 

X4-14

 

 

 

 

4

X5-8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

CN5-2

 

X4-6

 

 

 

 

5

X5-15

 

 

 

 

 

 

 

 

 

 

RUN-TIME

 

 

 

 

 

 

 

 

 

 

CONTACTS

4

 

CN5-9

 

X4-13

 

 

 

 

TR2

 

 

 

 

 

 

 

 

 

 

 

 

SYSTEM

S6

21

 

CN6

 

X6

 

 

 

 

X1-7

 

 

 

 

 

 

 

 

 

 

SENSOR

 

22

 

CN6

 

X6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTDOOR

S5

23

 

CN6

 

X6

 

 

 

FLAME ROD

 

 

 

 

 

SPARK

SENSOR

 

24

 

 

 

 

 

 

 

 

S4

 

CN3-9

 

 

 

ROD

 

 

 

 

TANK

26

 

 

X4-9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SENSOR

 

27

 

CN3-6

 

X4-6

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

HIGH VOLTAGE SPARK LEAD

SHIELD

 

29

 

CN6

 

X6

 

A

 

30

 

 

 

 

 

 

 

 

CASCADE

 

31

 

CN6

 

X6

NOTES:

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SHIELD

 

32

 

CN6

 

X6

1. Where possible, switches are shown without utilities (gas, water or

 

 

 

 

 

BMS +

 

33

 

CN6

 

X6

 

electricity) connected to the unit. As such, actual switch states may

0-10V

 

 

 

 

 

vary from those shown on diagrams depending upon whether utilities

IN -

34

 

CN6

 

X6

 

 

 

CN6

 

 

 

are connected or a fault condition is present.

SYS PUMP +

 

35

 

 

X6

 

0-10V

 

 

 

 

2. See wiring diagram for additional notes.

 

IN -

 

36

 

CN6

 

X6

 

 

 

 

 

 

BLR PUMP +

 

37

 

CN6

 

X6

 

 

 

 

 

 

0-10V

 

 

 

 

 

 

 

 

 

 

OUT -

38

 

CN6

 

X6

 

 

 

 

 

BOX DEPICTS

 

 

 

 

 

 

 

 

RATE +

0-10V

39

 

CN6

 

X6

 

 

 

 

 

OPTIONAL ITEMS

 

 

 

 

 

 

 

 

 

 

OUT -

40

 

 

 

 

 

 

 

 

 

LOW VOLTAGE

 

 

 

M

 

 

 

 

 

 

SHIELD

 

41

 

 

 

 

 

 

 

 

120 VAC

 

CN8-1

 

O

X4-1

 

 

 

 

 

A

 

42

X6-1

D

X9-2

 

 

 

 

HIGH VOLTAGE

MODBUS B

 

43

CN8-2

X6-2

B

X4-2

X9-1

 

 

 

 

SHIELD

 

44

CN8-3

X6-3 U

X4-3

X9-3

 

 

 

 

LADDER DIAGRAM

 

 

 

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LBL20148 REV C

 

 

 

 

 

 

 

 

 

 

 

 

77

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Image 77
Lochinvar 81 - 286 operation manual Diagrams, PC Interface

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.