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

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

CN5-5

CN7-3

CN7-1

19

17

15

15

13

13

10

PC INTERFACE

 

CONNECTION BOARD

 

 

 

 

 

 

 

 

INTEGRATED

 

 

 

 

 

CONTROL

LWCO

 

FLOW

CN5-14 X4-8

 

 

 

 

CN7-4

11

SWITCH

12

 

 

 

 

 

CN5-10

X4-12

24 VAC

 

 

 

 

 

 

CN7-2

 

 

 

 

HEAT/LOOPDEMAND 1

 

 

CN5-7

X4-1

 

 

 

 

 

20

 

 

 

 

HEAT/LOOPDEMAND 2

 

 

CN5-13

X4-9

 

 

 

 

 

18

 

 

 

 

HEAT/LOOPDEMAND 3

 

 

CN5-6

X4-2

 

16

 

 

 

 

TANK

 

 

 

 

THERMOSTAT

 

 

CN5-12

X4-10

 

14

 

 

 

 

LOW GAS

HIGH GAS

 

 

 

 

PRESSURE

PRESSURE

 

 

 

 

SWITCH

SWITCH

 

 

CN5-11

X4-11

 

 

 

 

 

9

 

 

 

 

 

INTEGRATED

 

 

CN5-3

X4-5

 

 

 

 

 

 

CONTROL

 

LOUVER

5

 

 

 

 

RELAY COIL

 

 

 

 

 

 

 

 

 

24VAC

6

 

 

 

 

LOUVER

7

 

 

 

 

PROVING SWITCH

 

 

 

 

CN5-4

X4-4

 

X7

 

 

 

 

 

 

 

RIBBON CABLE

 

 

 

 

 

 

 

 

X5-2

S2

X5-6

 

 

X5-10

 

 

 

 

ALARM

BELL

1

SILENCING

SWITCH

2

6

13

ALARM

CONTACTS

RUN-TIME

CONTACTS

INLET

SENSOR

OPERATING

SENSOR

HIGH LIMIT

SENSOR

FLUE

SENSOR

FLUE

SENSOR

CONNECTION

BOARD

1

2

3

4

S1a

X5-4

AIR PRESSURE

X5-11

 

 

 

SWITCH

 

 

S1b

X5-12

 

 

 

 

 

X2-2

 

 

 

 

 

S3a

X5-5

GAS VALVE

 

 

 

 

GAS VALVE

 

 

 

 

 

 

 

 

X5-13

 

X2-1

RELAY

S3b

 

 

 

 

 

 

 

 

X5-14

BLOWER

 

 

 

 

1

X5-7

 

 

 

2

X5-16

CN5-1

X4-7

 

 

 

CN5-8

X4-14

 

4

X5-8

CN5-2

X4-6

 

5

X5-15

 

 

 

CN5-9

X4-13

 

TR2

 

 

 

 

 

SYSTEM

S6

21

CN6

X6

 

X1-7

SENSOR

OUTDOOR S5 SENSOR

TANK S4 SENSOR

SHIELD

A

CASCADE

B

SHIELD

BMS +

22

23

24

26

27

29

30

31

32

33

CN6

X6

 

CN6

X6

FLAME ROD

 

 

SPARK

CN6

X6

ROD

 

CN6

X6

CAUTION HIGH VOLTAGE SPARK LEAD

 

CN6

X6

NOTES:

 

 

CN6

X6

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

 

 

CN6

X6

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

IN -

0-10V

34

CN6

 

 

 

X6

vary from those shown on diagrams depending upon whether utilities

CN6

 

 

X6

are connected or a fault condition is present.

SYS PUMP +

35

2. See wiring diagram for additional notes.

IN -

0-10V

36

CN6

X6

CN6

X6

BLR PUMP + 0-10VOUT -

RATE + 0-10V OUT -

SHIELD

A

MODBUS

B

SHIELD

37

38

39

40

41

42

43

44

 

CN6

X6

 

BOX DEPICTS

 

CN6

X6

 

OPTIONAL ITEMS

 

 

M

 

LOW VOLTAGE

 

 

 

120 VAC

CN8-1

X6-1

O X4-1

X9-2

 

 

D

 

HIGH VOLTAGE

CN8-2

X6-2

B X4-2

X9-1

CN8-3

X6-3 U X4-3

X9-3

LADDER DIAGRAM

 

 

S

 

 

 

 

LBL20170 REV D

 

 

 

 

78

Page 78
Image 78
Lochinvar WH 55-399 operation manual Diagrams, PC Interface

WH 55-399 specifications

The Lochinvar WH 55-399 is a high-efficiency water heater designed for residential and commercial applications, offering a reliable solution for hot water needs. This model represents an advanced approach to water heating, combining cutting-edge technologies and features that ensure optimal performance and energy efficiency.

One of the standout features of the Lochinvar WH 55-399 is its high thermal efficiency, which is a key factor in reducing energy consumption and operating costs. With an efficiency rating exceeding 90%, this water heater ensures that more energy is converted into usable hot water, making it an environmentally friendly choice.

The WH 55-399 utilizes advanced condensing technology, which allows it to extract additional heat from the exhaust gases before they are expelled. This process not only increases efficiency but also significantly decreases greenhouse gas emissions. The unit is also equipped with an intelligent control system that allows for precise temperature adjustments, ensuring that the user has an optimal supply of hot water while maintaining energy savings.

Another important aspect of this model is its impressive recovery rate. The ability to quickly heat water after a significant draw ensures that users will not experience interruptions in their hot water supply, making it ideal for busy households or commercial environments. This is particularly beneficial in applications requiring consistent hot water availability, such as restaurants or athletic facilities.

The Lochinvar WH 55-399 is designed with durability in mind. Constructed from high-quality materials, this water heater boasts a robust tank lined with corrosion-resistant coatings, extending the lifespan of the unit and reducing maintenance needs. Additionally, it features a reliable gas burner and a well-insulated tank, contributing to its overall efficiency and performance.

Safety is also a priority with the WH 55-399. The unit incorporates multiple safety features, including a flame sensor, automatic shut-off valve, and over-temperature protection, ensuring peace of mind for users.

In summary, the Lochinvar WH 55-399 stands out with its combination of high efficiency, advanced technology, and durable construction. Whether for residential or commercial use, this water heater provides a dependable and cost-effective solution for all hot water needs. Its innovative design and performance characteristics make it a top choice for anyone seeking a premium water heating option.