Installation & Operation Manual

13 Diagrams

Figure 13-2Ladder Diagram

120VAC

JUNCTION BOX

NEUTRAL

TERMINAL STRIP

 

 

 

 

TERMINAL STRIP

 

120V SUPPLY "L"

 

 

 

 

120V SUPPLY "N"

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IN

 

 

 

 

 

 

GROUND

SYSTEM

ON / OFF

 

INTEGRATED CONTROL

 

 

 

PUMP

SWITCH

 

 

 

 

BLOWER

 

CONTACTS

X1-6

 

F2

 

X1-1

1

2

 

 

 

3.15A

 

 

 

 

 

 

 

F1

 

X1-2

3

 

BOILER

 

 

 

 

 

PUMP

 

 

 

 

 

 

 

CONTACTS

 

 

5A

SYSTEM PUMP

SYSTEM PUMP

 

 

 

 

 

RELAY

X1-3

RELAY

 

 

 

 

 

 

 

 

 

 

 

 

DHW PUMP

 

DHW PUMP

 

DHW

 

 

 

RELAY

X1-4

RELAY

 

PUMP

 

 

 

 

 

 

CONTACTS

 

 

 

 

 

 

 

 

 

 

BOILER PUMP

 

BOILER PUMP

 

 

 

 

F3

RELAY

 

RELAY

 

 

 

 

.8A

24V DC

 

 

 

RELAY BOARD

X5-9

 

 

SUPPLY

X5-1

 

 

 

 

 

 

 

 

 

120 VAC

 

 

 

 

 

X4-3

3.5A

24 VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KB 801 ONLY

 

 

 

CONNECTION BOARD

 

 

 

 

 

 

 

 

 

 

CN5-5

 

 

 

 

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

 

 

 

 

 

 

 

 

INTEGRATED

 

CN5-3

X4-5

 

 

 

 

 

 

LOUVER

 

 

 

 

 

 

 

 

 

CONTROL

 

5

 

 

 

 

 

 

 

 

 

 

RELAY COIL

 

 

 

 

 

 

 

 

 

 

 

24VAC

6

 

 

 

 

 

 

 

 

 

 

LOUVER

7

 

 

 

 

 

 

 

 

 

 

PROVING SWITCH

 

 

 

 

 

 

 

 

 

 

CN5-4

X4-4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X7

 

 

8

 

 

 

 

 

 

 

RIBBON CABLE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X5-2

 

PC INTERFACE

 

 

 

 

 

O-TEMP HEX SW

BLOCKED

X5-10

 

 

 

X5-6

 

 

DRAIN SWITCH

 

 

 

 

S2

 

 

 

 

 

 

 

 

 

INLET

 

 

 

 

 

 

 

ALARM

BELL

1

SENSOR

 

 

 

 

 

AIR PRESSURE

X5-11

 

 

X5-4

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

OPERATING

S1a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SENSOR

 

 

 

 

 

 

 

 

 

 

 

HIGH LIMIT

S1b

X5-12

 

 

GAS VALVE

 

 

 

 

 

 

 

 

X2-2

 

 

 

2

SENSOR

 

 

 

 

 

 

 

SILENCING

 

FLUE

S3a

X5-5

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

6

SENSOR

 

 

 

 

 

 

X2-1

 

 

 

 

X5-13

 

 

 

 

 

 

 

S3b

 

 

 

 

 

 

 

 

 

FLUE

 

 

 

 

 

 

 

 

 

 

SENSOR

 

X5-14

 

 

BLOWER

 

 

 

 

13

CONNECTION

 

 

 

 

1

X5-7

 

 

 

 

 

 

 

 

 

 

 

 

 

BOARD

 

 

 

 

 

 

2

X5-16

L

OUT

SYSTEM

PUMP

BOILER

PUMP

DHW

PUMP

INTEGRATED

CONTROL

GAS VALVE

RELAY

 

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

LBL20141 REV C

78

Page 78
Image 78
Lochinvar 801, 400 operation manual 2Ladder Diagram

400, 801 specifications

The Lochinvar 801,400 is a cutting-edge solution in the realm of high-efficiency commercial water heating. This model represents a significant advancement in the design and functionality of water heaters, catering primarily to the demands of large-scale facilities like hotels, hospitals, and large industrial operations.

One of the standout features of the Lochinvar 801,400 is its impressive heating capacity, which can produce up to 801,400 BTUs, making it suitable for high-demand applications. This output is crucial for establishments that require a consistent supply of hot water, such as commercial kitchens and laundry facilities. The robust design ensures that it can handle peak demand periods without compromising performance.

Another significant aspect is the innovative use of advanced technology in its operation. The Lochinvar 801,400 integrates smart controls that enhance its efficiency and ease of operation. These controls allow for precise monitoring and adjustment of water temperatures, ensuring that the system operates within optimal parameters while maximizing energy savings. The intelligent monitoring system can provide real-time updates, making it easier for facility managers to keep track of performance and address maintenance needs proactively.

The construction of the Lochinvar 801,400 incorporates durable materials that not only enhance the longevity of the unit but also offer resistance to corrosion and wear. This durability translates into lower maintenance costs and an extended lifespan for the unit, making it a worthwhile investment for businesses.

Moreover, the Lochinvar 801,400 is designed with energy efficiency in mind. It boasts a high thermal efficiency rating, which reduces operational costs and minimizes the carbon footprint of heating operations. This efficiency is critical in today’s environmentally conscious market, where businesses are seeking to reduce their energy consumption and comply with strict regulations.

The design of the Lochinvar 801,400 also prioritizes safety, featuring innovative safety controls and fail-safes that protect both the unit and the users.

In summary, the Lochinvar 801,400 offers a combination of high capacity, advanced technology, durability, and energy efficiency, making it an excellent choice for commercial water heating solutions. As industries continue to evolve, the demand for reliable and efficient water heating solutions like the Lochinvar 801,400 will only increase.