Lochinvar 402 - 2072 Inlet ***F, Inlet Open, Inlet Shorted, Syssup ***F, Syssup Open, Sysrtn ***F

Page 59

Installation & Operation Manual

7 Operating information (continued)

Status Display Screens (cont’d)

By using the Previous/Next (, ) arrow keys on the SMART SYSTEM display panel, you can navigate through the 11 display screens. Each screen will contain two (2) viewable items. The following is a description of the individual items and what they can display:

Screen #

Display shows:

Description

 

 

 

 

 

When the inlet sensor has been selected as the control sensor, the

 

INLET: ***F (***)

control will display the inlet temperature as well as the set point in

 

 

parenthesis.

Screen #2

 

 

INLET: ***F

If the inlet sensor has not been selected as the control sensor or a system

Line 1

return sensor is connected, only the inlet temperature will be displayed.

 

 

 

 

 

INLET: OPEN

The control does not detect the inlet sensor.

 

 

 

 

INLET: SHORTED

The inlet sensor wires or the sensor itself has become shorted.

 

 

 

Screen #2

RISE: ***F

The difference between the inlet temperature and the outlet temperature

Line 2

is displayed.

 

 

 

 

Press the Next arrow key on the SMART SYSTEM display to access Screen #3.

 

 

When the system supply sensor has been selected as the control sensor,

 

SYSSUP: ***F (***)

the control will display the system supply temperature as well as the set

 

 

point in parenthesis.

Screen #3

SYSSUP: ***F

If the system supply sensor has not been selected as the control sensor,

only the system supply temperature will be displayed.

 

Line 1

 

 

SYSSUP: OPEN

The control does not detect the system supply sensor.

 

 

 

 

 

SYSSUP: SHORTED

The system supply sensor wires or the sensor itself has become shorted.

 

 

 

 

 

When the system return sensor has been selected as the control sensor,

 

SYSRTN: ***F (***)

the control will display the system return temperature as well as the

 

 

set point in parenthesis.

 

 

 

Screen #3

SYSRTN: ***F

If the system return sensor has not been selected as the control sensor,

Line 2

only the system return temperature will be displayed.

 

 

 

 

SYSRTN: OPEN

The control does not detect the system return sensor.

 

 

 

 

SYSRTN: SHORTED

The system return sensor wires or the sensor itself has become

 

shorted.

 

 

Press the Next arrow key on the SMART SYSTEM display to access Screen #4.

 

OUTDOOR: ***F

The control will display the outdoor air temperature as sensed by the

 

outdoor air sensor.

Screen #4

 

 

 

OUTDOOR: OPEN

The control does not detect the outdoor air sensor.

Line 1

 

OUTDOOR: SHORTED

The outdoor air sensor wires or the sensor itself has become shorted.

 

 

 

 

TANK: ***F

The control will display the tank temperature as sensed by the tank

 

sensor.

Screen #4

 

TANK: OPEN

The control does not detect the tank sensor.

Line 2

 

 

 

TANK: SHORTED

The tank sensor wires or the sensor itself has become shorted.

 

 

 

59

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Contents Save this manual for future reference Models 402Contents Removal of Combustion Chamber Lining or Base Panels Please read before proceedingSpecial instructions Owner warning Safety informationCopper-fin II How it works Copper-fin II How it works Copper-fin II How it works Copper-fin =B=R Rating RatingsFreeze protection Determine unit locationLocation of unit Indoor clearances from combustible constructionCombustion and ventilation air Outdoor boiler installationLocation Hydronic systems anti-freezeMinimum Recommended Combustion AIR Supply to Equipment Room Outside Combustion Air Using Direct VentingCombustion air filter Exhaust fansCAT I Negative pressure non-condensing VentingIdentify your appliance’s vent system CAT IV Flue pipe materialsDirect Vent see Barometric damper location General informationVenting support Common Venting Systems Conventional negative draft venting seeNegative draft Flue outlet pipingInspection of a masonry chimney Masonry chimney installationsVertical vent termination clearances and location 1Vent Termination from Peaked Roof 10 ft. or Less From Ridge Sidewall air inlet Vertical DirectAire venting seeCombustion air inlet piping Length of air inlet pipeClearances Vertical Rooftop Air InletCombined air inlet points Directaire Kits Model Horizontal KIT Vertical KIT Venting of flue productsSidewall vent termination clearances and location Sidewall venting seeSidewall with fan Sidewall venting terminationSidewall venting without fan Drain tee installationModels 402 Venting of flue products Horizontal DirectAire venting Powered Venting seeVertical DV venting termination Direct venting seeFlue outlet piping Combustion air inlet piping Masonry chimney installationHorizontal DV venting termination Horizontal Vent Termination Clearances and LocationSealing PVC, CPVC, ABS, dryer vent, and flex duct vent pipe Connecting the air inlet pipe to the unitAir inlet piping materials Length of air inlet pipeVertical Combustion Air Inlet Clearances Multiple sidewall direct vent installationsVertical and sidewall combustion air inlet Horizontal combustion air inlet clearancesOutdoor vent cap kit Outdoor installation seeOutdoor vent/air inlet location Gas connection Connecting to gas supplyGas connections Gas pressure testVenting of combination gas valves Combination gas valvesGas train and controls Checking gas supply pressure GAS Piping Size ChartHeat exchanger Water flow switchWater connections Inlet and outlet connectionsWater connections heating boilers only Heating boiler installationsRelief valve Piping of the boiler systemLTV Valve Kits Model LTV Valve KIT Minimum boiler water temperaturesLow Temperature Return Water Systems Low temperature bypass requirementsMaximum Flow for Heating Boiler Low system water volumeThree way valves in system Radiant floor and snow melt heating systemsDHW installation Temperature / pressure gaugeTypical heating boiler installations Installation with a chilled water systemDiameter GPM4Primary/Secondary Piping of Multiple Boilers Floor Drain Heating Supply Loop 6Primary/Secondary Piping with Buffer Tank AMP Draw Data Installation must comply withElectrical connections Boiler operating control moduleDHW Domestic Hot Water thermostat Line voltage connectionsEMS or remote thermostat connection Low voltage connectionsSystem supply sensor recommended use Louver proving switchAlarm contacts Louver relay4Low Voltage Field Wiring Connections Wiring of the cascadeStart-up Start the boiler Check thermostat circuitsCheck vent and air piping Placing the boiler in operation1Lighting Instructions Set clock Configuration of the cascadeSet DHW operation How the control module operates Operating informationGeneral How the appliance operatesProtection features Temperature controlCascade 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 Operation Display Sequence of operationCopper-fin II control module MENU/EXIT Display Screen ENTER/RESET UpdownTo save parameters and exit programming Access modesInstaller UserStatus display screens Syssup ***F Inlet ***FInlet Open Inlet ShortedFAN Speed Unit Pump DelayDHW Pump Delay STG DemandMIX VAL POS ** % Operation of the cascadeMaximum Water Flow Temperature Rise AT Full Rate Fire 90 GPM FlowModel Temperature Rise F Domestic water heatersWater 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 Ft. Hd Pump operationHeat exchanger Minimum Pump PerformanceDomestic water temperatures Thermostat adjustment procedureMinimum water temperatures domestic hot water use Location of Cold Water Supply Piping Connections Optional relief valveThermal expansion Cathodic protectionOwner maintenance Maintenance Maintenance and annual startupService technician Maintenance Ignition system checkout Check all wiringCheck control settings Check relief valve Inspect/replace hot surface igniterCheck flue gas passageways Inspect and clean burnerPerform start-up and checks Check burner flameOiled bearing circulators Inspect and clean the heat exchangerReview with owner Digital Harness Connection diagramSplay Ladder DiagramFlow 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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