Lochinvar 402 - 2072 operation manual Set DHW operation, Set clock, Configuration of the cascade

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Installation & Operation Manual

6 Start-up

Set DHW operation

Verify DHW circulator mode (boiler only)

The DHW Mode is programmed to heat an indirect domestic hot water tank. When the tank thermostat or tank sensor calls for heat, the SMART SYSTEM control will turn on the DHW pump and turn off the boiler pump (if running). If the system pump is running, it will remain on. When the DHW call for heat ends, and there is no space heating call for heat, the DHW pump will continue to run for a period of time. This pump delay is set at the factory to 30 seconds. If a shorter or longer delay is desired, the appropriate parameter in the control must be changed. See the Copper-fin II Service Manual for a detailed explanation of this procedure. If there is an active space heating call for heat, then the boiler pump will be turned on and the DHW pump will be turned off.

Set outlet target temperature (boiler only)

When in the DHW Mode, the control will modulate to maintain the outlet temperature to a set point. This set point is set at the factory to 180°F (82.2°C). If a different set point is desired, the appropriate parameter in the control must be changed. See the Copper-fin II Service Manual for a detailed explanation of this procedure.

Set tank target temperature

If a tank sensor is used, the tank set point can be adjusted by pressing either the UP or DOWN key. A menu will appear on the LCD display. Press the DOWN key to select the tank set point, and press ENTER. Use the UP and DOWN keys to adjust the set point. Press the ENTER key again to save the new set point and return to the normal display.

Set clock

The SMART SYSTEM control has a built-in clock that it uses for its night setback feature and for logging events. This clock must be set when the appliance is installed, and anytime the appliance has been powered off for more than one month. Use the following procedure to set the clock:

1.Press and hold the MENU key (FIG. 7-1) for at least 5 seconds.

2.The display changes to ready “ENTER MENU CODE”, with four (4) zeros below it.

3.Change the zeros to match the user code (factory set at “0704”). Use the UP and DOWN keys to increment or decrement the flashing digit, and the NEXT and PREVIOUS keys to select which digit flashes.

4.Press the ENTER key.

5.The display changes to read USER CODE for a few seconds, then displays a menu.

6.Press the ENTER key.

7.Press the UP key twice to display “A3 DATE AND TIME”.

8.Press the ENTER key once.

9.The date and time are displayed as “YY:MM:DD W hh:mm”, where:

mm:minutes

hh:hour (24 hour time; e.g., 2:00 PM = 14:00)

W:day of the week (1 = Sunday, 2 = Monday, 3 = Tuesday, etc.,)

YY:

year

MM:

month

DD:

date

NOTICE

The internal clock does not adjust for

Daylight Savings Time and therefore, will

 

require a manual adjustment.

Use the UP and DOWN keys to increment or decrement the flashing number, and the NEXT and PREVIOUS keys to select which number flashes.

10.Press the ENTER key to save the setting.

11.Press the MENU key twice to exit the Programming Mode.

Configuration of the cascade

When installed in a Cascade system, the individual controls must be programmed for cascade operation. This is accomplished by accessing the control parameters.

Input the Installer code as described in the Copper-fin II Service Manual. Once the control parameters have been accessed, use the DOWN arrow key to select the H Control Mode parameters. Press the ENTER key to access these parameters. Use the UP arrow key to access parameter H4 Cascade. Press the ENTER key to access this parameter. Use the DOWN arrow key to select Enable. Press the ENTER key to program this into the control. Press the EXIT key, then press the DOWN key until I Cascade is selected.

Press the ENTER key to select the parameter I1 BLR Address. Press the ENTER key to access this parameter. Each unit in the Cascade system must be programmed with its own address. The unit designated as the Leader will have an address of 0. The remaining units in the Cascade will be Members and have addresses from 1 - 7. Use the UP and DOWN arrow keys to select the appropriate address. Press the ENTER key to program this into the control.

Press the MENU key twice to exit the control parameters. Repeat this procedure for all appliances in the Cascade, designating the Leader control and the Member controls.

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Contents Models 402 Save this manual for future referenceContents Removal of Combustion Chamber Lining or Base Panels Please read before proceedingSpecial instructions Safety information Owner warningCopper-fin II How it works Copper-fin II How it works Copper-fin II How it works Ratings Copper-fin =B=R RatingIndoor clearances from combustible construction Determine unit locationLocation of unit Freeze protectionHydronic systems anti-freeze Outdoor boiler installationLocation Combustion and ventilation airOutside Combustion Air Using Direct Venting Minimum Recommended Combustion AIR Supply to Equipment RoomExhaust fans Combustion air filterCAT IV Flue pipe materials VentingIdentify your appliance’s vent system CAT I Negative pressure non-condensingDirect Vent see Barometric damper location General informationVenting support Flue outlet piping Conventional negative draft venting seeNegative draft Common Venting SystemsInspection of a masonry chimney Masonry chimney installationsVertical vent termination clearances and location 1Vent Termination from Peaked Roof 10 ft. or Less From Ridge Length of air inlet pipe Vertical DirectAire venting seeCombustion air inlet piping Sidewall air inletClearances Vertical Rooftop Air InletCombined air inlet points Venting of flue products Directaire Kits Model Horizontal KIT Vertical KITSidewall venting termination Sidewall venting seeSidewall with fan Sidewall vent termination clearances and locationDrain tee installation Sidewall venting without fanModels 402 Horizontal DirectAire venting Powered Venting see Venting of flue productsVertical DV venting termination Direct venting seeFlue outlet piping Horizontal Vent Termination Clearances and Location Masonry chimney installationHorizontal DV venting termination Combustion air inlet pipingLength of air inlet pipe Connecting the air inlet pipe to the unitAir inlet piping materials Sealing PVC, CPVC, ABS, dryer vent, and flex duct vent pipeHorizontal combustion air inlet clearances Multiple sidewall direct vent installationsVertical and sidewall combustion air inlet Vertical Combustion Air Inlet ClearancesOutdoor vent cap kit Outdoor installation seeOutdoor vent/air inlet location Gas pressure test Connecting to gas supplyGas connections Gas connectionVenting of combination gas valves Combination gas valvesGas train and controls GAS Piping Size Chart Checking gas supply pressureInlet and outlet connections Water flow switchWater connections Heat exchangerPiping of the boiler system Heating boiler installationsRelief valve Water connections heating boilers onlyLow temperature bypass requirements Minimum boiler water temperaturesLow Temperature Return Water Systems LTV Valve Kits Model LTV Valve KITRadiant floor and snow melt heating systems Low system water volumeThree way valves in system Maximum Flow for Heating BoilerInstallation with a chilled water system Temperature / pressure gaugeTypical heating boiler installations DHW installationGPM Diameter4Primary/Secondary Piping of Multiple Boilers Floor Drain Heating Supply Loop 6Primary/Secondary Piping with Buffer Tank Boiler operating control module Installation must comply withElectrical connections AMP Draw DataLow voltage connections Line voltage connectionsEMS or remote thermostat connection DHW Domestic Hot Water thermostatLouver relay Louver proving switchAlarm contacts System supply sensor recommended useWiring of the cascade 4Low Voltage Field Wiring ConnectionsStart-up Placing the boiler in operation Check thermostat circuitsCheck vent and air piping Start the boiler1Lighting Instructions Set clock Configuration of the cascadeSet DHW operation How the appliance operates Operating informationGeneral How the control module operatesTemperature control Protection featuresCascade Boiler temperature regulationOutdoor reset operation, if used boilers only Sequence of the cascade DHW, Night Setback, and Ramp Delay operation with cascadeDAY Switching on Sequence Sequence of operation Operation DisplayMENU/EXIT Display Screen ENTER/RESET Updown Copper-fin II control moduleUser Access modesInstaller To save parameters and exit programmingStatus display screens Inlet Shorted Inlet ***FInlet Open Syssup ***FSTG Demand Unit Pump DelayDHW Pump Delay FAN SpeedOperation of the cascade MIX VAL POS ** %Domestic water heaters Temperature Rise AT Full Rate Fire 90 GPM FlowModel Temperature Rise F Maximum Water FlowWater chemistry 1Typical Water Heater Piping with Storage Tank 2Single Water Heater Piping with Two Storage Tanks 3Multiple Water Heater Piping with a Single Storage Tank 4Multiple Water Heater Piping with Multiple Storage Tanks Minimum Pump Performance Pump operationHeat exchanger Ft. HdDomestic water temperatures Thermostat adjustment procedureMinimum water temperatures domestic hot water use Cathodic protection Optional relief valveThermal expansion Location of Cold Water Supply Piping ConnectionsOwner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check relief valve Inspect/replace hot surface igniter Check all wiringCheck control settings Ignition system checkoutCheck burner flame Inspect and clean burnerPerform start-up and checks Check flue gas passagewaysOiled bearing circulators Inspect and clean the heat exchangerReview with owner Connection diagram Digital HarnessSplay Diagram LadderFlow Switch
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402 - 2072 specifications

The Lochinvar 402 - 2072 is a versatile and highly efficient boiler designed to meet the heating demands of modern residential and commercial applications. This model stands out due to its innovative technologies, advanced features, and a high level of reliability, making it an ideal choice for consumers looking for an enduring and economical heating solution.

One of the primary characteristics of the Lochinvar 402 - 2072 is its impressive energy efficiency. With an exceptional annual fuel utilization efficiency (AFUE) rating, this boiler ensures minimal energy waste, allowing homeowners and business operators to save significantly on their energy bills. The model incorporates advanced condensing technology that enables it to extract heat from the combustion gases, maximizing heat transfer and reducing emissions.

The Lochinvar 402 - 2072 is built with a robust stainless steel construction that enhances durability and resilience against corrosion and other environmental factors. This material not only prolongs the lifespan of the unit but also contributes to its outstanding thermal efficiency. Additionally, the boiler's compact design allows for flexible installation options, making it suitable for various spaces, including tight utility rooms and basements.

Equipped with a user-friendly control interface, the Lochinvar 402 - 2072 allows for easy monitoring and adjustment of settings. Its advanced digital display provides real-time data on system performance, ensuring the operator can maintain optimal performance and efficiency.

Another noteworthy feature is the unit's quiet operation. The design includes sound-dampening insulation and high-efficiency circulators, keeping noise to a minimum, which is an essential trait for both residential and commercial settings.

The Lochinvar 402 - 2072 is also designed with safety in mind. It incorporates multiple safety features including an automated vent damper, low water cutoff, and a comprehensive control system that monitors various operating conditions. This proactive approach to safety ensures that potential issues are identified and addressed before they become critical.

In conclusion, the Lochinvar 402 - 2072 boiler presents an exceptional combination of efficiency, durability, and user-friendly features. Its advanced condensing technology, stainless steel construction, and focus on safety make it a leading choice in the competitive boiler market, catering to the heating needs of a diverse range of applications while ensuring environmental responsibility. For those in search of a dependable and efficient heating solution, the Lochinvar 402 - 2072 is certainly worth considering.
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