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

 

 

GND

 

 

 

 

 

BUILDING

 

 

 

 

 

 

RECIRC

 

 

 

5A

BUILDING

 

PUMP

 

 

 

 

RECIRC PUMP

 

 

 

 

 

 

RELAY

 

 

 

 

 

 

DHW PUMP

 

DHW

 

 

 

 

RELAY

DHW

PUMP

 

 

 

 

 

DHW

 

 

 

 

X1-3

PUMP "L"

PUMP "N"

 

 

 

F3

 

 

 

 

 

 

 

 

TERMINAL

TERMINAL

 

 

 

.8A

24V DC

STRIP

STRIP

 

 

X5-9

 

SUPPLY

 

 

 

 

 

X5-1

 

 

 

 

 

120 VAC

 

 

 

 

 

X4-3

24 VAC

 

 

 

 

 

3.5A

 

 

 

 

 

 

 

 

 

 

 

AW 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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOUVER

 

5

 

 

 

 

 

 

 

 

 

 

RELAY COIL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTEGRATED

24VAC

 

6

 

 

 

 

 

 

 

 

 

CONTROL

 

 

 

 

 

 

 

 

 

 

 

LOUVER

 

7

 

 

 

 

 

 

 

 

 

 

PROVING SWITCH

CN5-4

X4-4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

X7

 

 

 

 

 

 

 

 

 

RIBBON CABLE

 

 

 

 

 

 

PC INTERFACE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S2

 

 

X5-6

 

 

 

 

 

 

 

 

INLET

 

 

 

 

 

 

 

 

 

ALARM BELL

1

SENSOR

 

 

 

 

 

 

 

 

 

 

OPERATING

S1a

 

 

X5-4

 

 

 

 

X5-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SENSOR

 

 

 

 

 

 

 

 

 

 

 

 

 

S1b

 

 

X5-12

 

 

BLOCKED

X5-10

 

 

HIGH LIMIT

 

 

 

DRAIN SWITCH

 

 

 

 

 

 

 

 

 

2

SENSOR

 

 

 

 

 

 

 

 

 

 

SILENCING SWITCH

FLUE

S3a

 

 

X5-5

 

AIR PRESSURE

 

 

 

 

 

X5-14

 

X2-2

 

 

SENSOR

 

 

 

 

GAS VALVE

 

 

6

 

 

 

 

 

 

 

SWITCH

 

 

 

 

S3b

 

 

X5-13

 

 

 

 

 

 

 

 

FLUE

 

 

 

 

 

 

 

 

 

 

 

SENSOR

 

 

 

 

 

 

 

 

 

 

13

CONNECTION

 

 

 

 

 

 

 

 

 

 

 

 

BOARD

 

 

 

 

 

 

 

 

 

GAS VALVE

 

 

 

 

CN5-1

 

X4-7

 

 

 

 

X2-1

RELAY

ALARM

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTACTS

2

 

CN5-8

 

X4-14

 

BLOWER

1

X5-7

 

 

 

 

 

 

 

 

 

3

 

CN5-2

 

X4-6

 

 

 

 

2

X5-16

RUN-TIME

 

 

 

 

 

 

 

 

CONTACTS

4

 

CN5-9

 

X4-13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

X5-8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

X5-15

 

 

 

 

 

 

 

 

 

 

 

TR2

 

TANK

S4

16

 

CN3-9

 

X4-9

 

 

 

 

X1-7

 

SENSOR

 

17

 

CN3-6

 

X4-6

 

 

 

 

 

 

SHIELD

 

19

 

CN6

 

 

 

 

 

SPARK

FLAME ROD

A

 

20

 

 

X6

 

 

 

 

 

 

 

 

 

 

 

 

 

ROD

 

 

CASCADE

 

21

 

CN6

 

X6

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SHIELD

 

22

 

CN6

 

X6

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

 

HIGH VOLTAGE SPARK LEAD

BMS +

 

23

 

CN6

 

X6

 

 

IN -

0-10V

24

 

CN6

 

X6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

RATE +

 

25

 

CN6

 

X6

 

are connected or a fault condition is present.

0-10V

 

 

 

 

2. See wiring diagram for additional notes.

 

OUT -

 

26

 

CN6

M

X6

 

 

 

 

 

 

SHIELD

 

27

 

 

 

 

 

 

 

 

 

A

 

28

CN8-1

X6-1

O

X4-1

X9-2

 

 

 

 

BOX DEPICTS

 

D

 

 

 

 

MODBUS

 

29

CN8-2

X6-2

B

X4-2

X9-1

 

 

 

 

OPTIONAL ITEMS

B

 

 

 

 

 

SHIELD

 

30

CN8-3

X6-3

U

X4-3

X9-3

 

 

 

 

LOW VOLTAGE

 

 

 

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VAC

 

 

 

 

 

 

 

 

 

 

 

 

HIGH VOLTAGE

LADDER DIAGRAM

LBL20149 REV B

72

Page 72
Image 72
Lochinvar 151 operation manual Diagrams, PC Interface

151 specifications

Lochinvar 151,286 is a notable model in the realm of commercial water heating solutions, designed primarily for large-scale applications. This model incorporates advanced technologies and features that set it apart in terms of efficiency, usability, and reliability.

One of the hallmark features of Lochinvar 151,286 is its high-efficiency system that leverages condensing technology. This technology enables the unit to extract additional heat from exhaust gases, allowing it to operate at an impressive annual fuel utilization efficiency (AFUE) rating. This not only reduces energy consumption, but it also significantly lowers operational costs.

The Lochinvar 151,286 is equipped with a robust stainless steel heat exchanger, which provides both durability and enhanced thermal efficiency. This design withstands the rigors of high-demand environments, making it ideal for restaurants, schools, hospitals, or any facility requiring consistent hot water supply. Its compact footprint allows it to be installed in tight spaces without sacrificing performance.

Another standout characteristic is its intelligent control system. The built-in touchscreen interface offers users an intuitive way to manage settings, monitor performance, and troubleshoot issues. This smart technology aids in simplifying maintenance and improves overall system reliability. The unit also features advanced safety protocols, including multiple sensors that monitor operation and provide alerts in case of irregular performance.

In terms of capacity, the Lochinvar 151,286 can deliver an impressive output, accommodating varying demands with ease. Its innovative modulation capabilities allow the unit to adjust its heating output based on real-time hot water needs, ensuring unmatched comfort and efficiency.

Supporting the model’s performance are versatile connectivity options. Lochinvar 151,286 can integrate seamlessly with building management systems, allowing facility managers to monitor and control heating processes remotely. This level of connectivity not only enhances control but also supports energy-saving strategies across the facility.

In conclusion, Lochinvar 151,286 stands out as a premium choice for commercial water heating needs. With its high-efficiency ratings, durable construction, intelligent control system, impressive capacity, and versatile connectivity, it ensures that hot water is delivered reliably and efficiently, meeting the demands of modern businesses while reducing energy costs. This combination of technology and design makes it an essential component for any large-scale facility focused on performance and sustainability.