Lochinvar 402 - 2072 service manual What is in this manual?, Service, Maintenance, Troubleshooting

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Copper-fin II/IIE Boiler and Water Heater Service Manual

What is in this manual?

Service

The Copper-fin display

• Display panel readout, buttons and their functions

Control module inputs

• Control module inputs and options

Control module outputs

• Control module outputs and options

General

How the appliance operates

How the control module operates

Access modes -- user and installer

Sequence of operation -- Domestic Hot Water (DHW)/space heating

Control panel menu access

Accessing programming mode and locating menus

(See separate guides covering the ModBus and PC interfaces)

Maintenance

Service and maintenance schedules

Address reported problems

Inspect appliance area and appliance interior

Check all piping for leaks

Flue vent system and air piping

Combustion air filter

Check water system

Check expansion tank

Check relief valve

Check igniter

Check all appliance wiring

Flame inspection

Check flue gas passageways

Inspect and clean burner

Checking combustion air pressure

Checking manifold gas pressure

Cleaning heat exchanger

Review with owner

Control panel parameter access

• Accessing and changing parameters from the display panel

Quick start information -- parameter tables

An index of available adjustments and readouts, where to access them and where to find detailed information.

Copper-fin boiler operation (pages 13 - 14)

A: General

B: Temperature Settings

C: Data Logging

D: Functions

E: DHW Settings

F: Outdoor Air Reset

G: Anti-cycling

H: Control Modes

I: Cascade

J: Building Management System (BMS)

K: Pumps

L: Service Notification

Copper-fin water heater operation (pages

15 - 16)

A: General

B: Temperature Settings

C: Data Logging

D: Functions

E: DHW Settings

F: Anti-cycling

G: Control Modes

H: Cascade

I: Building Management System (BMS)

J: Pumps

K: Service Notification

Troubleshooting

Troubleshooting table - No display

Checking temperature sensors

Troubleshooting table - Noisy system

Troubleshooting table - Fault messages displayed on Operator Interface

4

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Contents Copper-fin II/IIE Boiler and Water Heater Models 402 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid What is in this manual? ServiceMaintenance TroubleshootingService Copper-fin displayControl inputs Control outputs General Operation How the appliance operatesHow the control module operates Sequence of operationSequence of operation OUT 123.8F129HTR Postpurge Display panel menu access Display panel parameter access Parameter table a Boiler Operation OnlyAnti-cycle Time Anti Cycl Tm Parameter table B Water Heater Operation BMS Service Notification Pumps Temperature settings Viewable and changeable control parametersData logging FunctionsDHW settings Outdoor air reset boiler only Anti-cycling Control modes Building Management System BMS CascadeService Notification Circulation pumpsMaintenance Maintenance and annual startup Service technicianOwner maintenance See the User’s Information Manual for instructionsMaintenance Inspect/replace hot surface igniters Check relief valveInspect/replace hot surface igniter Check all wiring Check control settingsInspect and clean burner Perform start-up and checks2Adjusting air shutter 399,999 750,000 Btu/ hr Models Adjusting combustion air pressure Checking manifold gas pressureValve Fitting Control Knob Review with owner Inspect and clean the heat exchangerOiled bearing circulators Troubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit DoesResistance Temperature Checking temperature sensorsTemperature Resistance Noisy No PumpOperation Boiler Pump System Pump DHW PumpFlame Sequence Flow SwitchAnti-cycling Error No Flame IgnHSI Current Low Flame CKTAuto Reset No FlameRunning High LimitManual Reset Inlet LowSensor Open Sensor ShortedLouver Proving Tank OpenAPS Open APS ClosedRem Ctrl Flt Temp O/ShootParameters Progr Service Blk Watch Dog ErrorNo Error Stored Low Voltage
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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.