Lochinvar 2.5, 3.5 service manual Contents

Page 2

Contents

HAZARD DEFINITIONS

2

5. HYDRONIC PIPING

 

PLEASE READ BEFORE PROCEEDING

3

System Water Piping Methods

24

THE CREST -- HOW IT WORKS

4-5

Low Water Cutoff Device

24

RATINGS

6

Chilled Water System

24

1. DETERMINE BOILER LOCATION

 

Freeze Protection

24

Clearances

7

General Piping Information

24

Provide Air Openings to Room

8

Circulator Sizing

25

Flooring and Foundation

8

Near Boiler Piping Components

26-30

Vent and Air Piping

8

6. GAS CONNECTIONS

 

Prevent Combustion Air Contamination

8

Connecting Gas Supply Piping

31

Using an Existing Vent System to Install a New Boiler

..... 9

Natural Gas

32

Corrosive Contaminants and Sources

9

Pipe Sizing for Natural Gas

32

Removing a Boiler from Existing Common Vent

10

Natural Gas Supply Pressure Requirements

............. 32

Remove Boiler from Wood Pallet

11

Propane Gas

32

Combustion and Ventilation Air Requirements

12-13

Pipe Sizing for Propane Gas

32

2. GENERAL VENTING

 

Propane Supply Pressure Requirements

32

Direct Venting Options - Sidewall Vent

14

Check Inlet Gas Supply

33-34

Direct Venting Options - Vertical Vent

14

Gas Pressure

34

Direct Venting Options - Vert. Vent, Opt. Rm Air

14

Gas Valve Replacement

34

Direct Venting Options - Vert. Vent, Sidewall Air

14

7. FIELD WIRING

 

Install Vent and Combustion Air Piping

15

Line Voltage Connections

35

Air Inlet Pipe Materials

15

Low Voltage Connections

36

Requirements for Installation in Canada

15

Wiring of the Cascade

37

Vent and Air Piping

16

8. CONDENSATE DISPOSAL

 

Air Intake / Vent Connections

16

Condensate Drain

39

Min./Max. Combustion Air & Vent Piping Lengths

17

9. STARTUP

40-45

Vent and Air Piping

17

10. OPERATING INFORMATION

 

Common Venting

18

General

46-48

3. VERTICAL DIRECT VENTING

 

Cascade

49

Vent/Air Termination - Vertical

19

Sequence of Operation

50

Determine Location

19

Status Screen

51

Prepare Roof Penetrations

19

Main Screen

52

Termination and Fittings

19-20

11. MAINTENANCE

 

Multiple Vent/Air Terminations

20

Maintenance & Annual Startup

53-57

4. SIDEWALL DIRECT VENTING

 

12. DIAGRAMS

 

Vent/Air Termination - Sidewall

21-23

Ladder Diagrams

58

Determine Location

21-23

Wiring Diagram

59

Prepare Wall Penetrations

22

Revision Notes

Back Cover

Termination and Fittings

22

 

 

Multiple Vent/Air Terminations

22-23

 

 

Room Air

23

 

 

Hazard definitions

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.

￿DANGER

￿WARNING

￿CAUTION CAUTION NOTICE

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage.

NOTICE indicates special instructions on installation, operation, or maintenance that are important but not related to personal injury or property damage.

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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.
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