Lochinvar 2.5, 3.5 service manual Field, Wiring

Page 38

38

Figure 7-3 Low Voltage

7 Field

BUILDING MANAGEMENT

SYSTEM

TANK THERMOSTAT

ENABLING

DEVICE

LOUVER

PROVING

SWITCH

LOUVER

RELAY

AUX

SWITCH 1

AUX

SWITCH 2

 

 

 

 

B

 

 

 

 

A

 

 

 

 

SHIELD

 

 

40

SHIELD

 

 

39

B

CASCADE

 

 

38

A

 

 

37

SHIELD

1

ALARM

36

- SYSTEM PUMP

2

CONTACTS

35

+

IN

3

RUN TIME

34

-

BMS

4

CONTACTS

33

+

IN

5

TANK

32

 

OUTDOOR

6

THERMOSTAT

31

 

SENSOR

7

ENABLE

30

 

TANK

8

 

29

 

SENSOR

9

LOUVER

28 SYSTEM SUPPLY

10

PROVING

27

 

SENSOR

11

LOUVER

26 SYSTEM RETURN

12

RELAY

25

 

SENSOR

13

AUX

24

- BOILER PUMP

14

SWITCH 1

23

+

OUT

15

AUX

22

-

RATE

16

SWITCH 2

21

+

OUT

 

 

20

SHIELD

 

 

19

B

MODBUS

 

 

18

A

 

 

17

SHIELD

SHIELD

A FROM PREVIOUS BOILER

B

B

A TO NEXT BOILER

SHIELD

0-10V INPUT SYSTEM PUMP

OUTDOOR SENSOR

TANK SENSOR

SYSTEM SUPPLY SENSOR

SYSTEM RETURN SENSOR

0-10V OUTPUT BOILER PUMP

B MODBUS

A

SHIELD COMMUNICATION BUS

Field Wiring Connections

wiring

Installation & Operation Manual

Image 38
Contents Save this manual for future reference Contents When servicing boiler Please read before proceedingCrest How it works BlowersCrest How it works Models 1.5 2.0 2.5 3.0 Ratings Crest Ahri RatingDetermine boiler location Installation must comply withRecommended clearances for service access Before locating the boiler, checkVent and air piping Provide air openings to roomFlooring and foundation Prevent combustion air contaminationAreas likely to have contaminants When using an existing vent system to install a new boilerProducts to avoid When removing a boiler from existing common vent system Remove boiler from wood pallet 7Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Optional room air General ventingDirect venting Install vent and combustion air piping Air inlet pipe materialsApproved Stainless Steel Vent Manufacturers Make Model Air intake/vent connectionsRemoving from existing vent Common venting Determine location Vertical direct ventingVent/air termination vertical Prepare roof penetrationsMultiple vent/air terminations 4Alternate Vertical Terminations with Multiple BoilersSidewall direct venting Vent/air termination sidewallPrepare wall penetrations 2Clearance to Doors and WindowsRoom air 4Multiple Vent Terminations must also comply with FigureHydronic piping 20F 40F 60F Circulator sizingModel Near boiler piping components Ball Valve Multiple Boilers Common Header Primary / Secondary Flow For all equipment and detailing required by local codes AIR Seperator Drain Port Typical System Supply Sensor Model Gas Inlet Size Connecting gas supply pipingGas connections Natural gas Propane GasGAS Piping Size Chart Check inlet gas supplyGas valve replacement Gas PressureLine voltage connections Field wiringInstallation must comply with Louver proving switch EnableOutdoor temperature sensor Low voltage connectionsWiring of the cascade Auxiliary switch 1Alarm contacts System supply sensorWiring FieldCondensate disposal Condensate drainCheck/control water chemistry Freeze protection when usedStart-up Fill and test water systemInspect condensate system Check for gas leaksCheck thermostat circuits Inspect/check condensate lines and fittingsIf boiler does not start correctly Final checks before starting the boilerStart the boiler Check system and boilerFor Your Safety Read Before Operating Set space heating operation Gas Natural Gas Propane ValveSet clock Verify HWG circulator mode Set HWG target temperatureConfiguration of the cascade Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if usedCascade Sequence of operation Crest control module Home Screen2Main Menu Screen Owner maintenance Maintenance Maintenance and annual startupService technician See the Crest User’s Information Manual for InstructionsMaintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Check flame signalHandling ceramic fiber materials Cleaning boiler heat exchangerReview with owner Niosh stated First AidDiagrams Integrated Control2Wiring Diagram
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3, 2, 3.5, 2.5 specifications

The Lochinvar 2, 3, 3.5, and 2.5 models are a standout lineup in the realm of commercial and residential water heating solutions. Known for their advanced technology and high efficiency, these units cater to a wide range of applications, ensuring optimal performance and reliability.

One of the key features of the Lochinvar models is their robust construction. Each unit is designed to withstand rigorous operational demands while providing excellent thermal efficiency. They are equipped with stainless steel heat exchangers, which offer superior resistance to corrosion and extend the lifespan of the equipment. This durability is essential for both commercial and residential settings where demand can vary significantly.

The Lochinvar 2, 3, 3.5, and 2.5 models utilize innovative control systems that enhance their operational efficiency and user convenience. The built-in Smart Control technology allows for easy monitoring and adjusting of system parameters, ensuring that users can maintain optimal performance with minimal effort. This feature is especially beneficial in commercial settings where large volumes of hot water are required, as it enables users to effectively manage their energy consumption.

Energy efficiency is another hallmark of the Lochinvar lineup. With high-efficiency ratings, these models help reduce energy costs significantly, making them an environmentally friendly option for heating water. The use of advanced combustion technology ensures that these units can deliver maximum heat output with minimal fuel consumption.

Additionally, the Lochinvar models are designed with safety and reliability in mind. They feature multiple safety controls and diagnostics that alert users to potential issues before they escalate, providing peace of mind. The integration of advanced venting options allows for flexible installation configurations, accommodating various building layouts and space requirements.

In summary, the Lochinvar 2, 3, 3.5, and 2.5 models define modern water heating technology with their combination of durability, efficiency, and advanced features. With their innovative design and user-friendly controls, they meet the demanding needs of both commercial and residential users, making them a top choice in the water heater market. Whether for new installations or replacements, these units deliver reliable performance and value.