Lochinvar SNR200-100, SNA500-125, SNA285-125 Status display screens, Status Display Screens

Page 51

TM

Installation & Service Manual

11 Operating information (continued)

Status display screens

Status Display Screens

By using the Previous/Next (￿, ￿) arrow keys on the electronic control module display panel, you can navigate through the five (5) 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

 

 

HTR: OFF

The unit has been turned OFF by the Enter/Reset button on the

 

 

electronic control module display panel.

 

 

 

 

 

 

 

 

 

Standby

The unit has not received a call for heat.

 

 

 

 

 

 

Prepurge

The unit has initiated a 10 second purge period on a call for heat.

 

 

 

 

 

 

Ignition

The unit has begun a 5 second spark period to ignite the main burner.

 

 

 

 

 

 

RUN***% Rate

The unit has fired and is running at the displayed percentage.

#1

 

 

 

 

 

The call for heat has been satisfied and the unit runs the fan for an

 

 

 

 

 

Postpurge

additional 10 seconds to clear the combustion chamber and vent system

 

 

 

of residual flue products.

 

 

 

 

 

 

Service

The unit has been placed in a temporary mode that will allow the unit

 

 

to fire at 100% of rate for the purpose of combustion analysis.

 

 

 

 

 

 

 

 

 

TANK:***.*F

The tank temperature is displayed.

 

 

 

 

 

 

Open

The control does not detect the tank sensor.

 

 

 

 

 

 

Shorted

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

 

 

 

 

 

Press

the Next ￿ arrow key on the

electronic control module display to access Screen #2.

 

 

HEX IN: ***.*F

The temperature at the inlet to the heat exchanger is displayed.

 

 

 

 

 

 

Open

The control does not detect the heat exchanger inlet sensor.

 

 

 

 

 

 

Shorted

The heat exchanger inlet sensor wires or the sensor itself has become

#2

 

shorted.

 

 

 

 

HEX OUT: ***.*F

The temperature at the outlet of the heat exchanger is displayed.

 

 

 

 

 

 

Open

The control does not detect the heat exchanger outlet sensor.

 

 

 

 

 

 

Shorted

The heat exchanger outlet sensor wires or the sensor itself has become

 

 

shorted.

 

 

 

 

 

 

 

 

Press

the Next ￿ arrow key on the

electronic control module display to access Screen #3.

 

 

 

 

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Contents What to do if YOU Smell GAS Installation & Service ManualContents Hazard definitions Please read before proceedingBlower Shield How it worksModels SNR150-100 -- SNA285-125 Model SNA500-125 Model SNA400-125CSA RatingsBefore locating the water heater, check Installation must comply withCloset and alcove installations Determine water heater location1Closet Installation Minimum Required Clearances Flooring and foundation Remove water heater from wood palletPrevent combustion air contamination Do not install the Shield water heater into 3Combustion Air Direct from Outside Minimum Recommended Combustion AIR Supply to Equipment Room Direct venting options General ventingVenting and combustion air CanadaVent pipe and fittings Air inlet pipe materials Air intake/vent connectionsVent Length Removing from existing ventVent and air piping Vent Size If using the alternate sidewall terminationSidewall direct venting Vent/air termination sidewall2Clearance to Gravity Air Inlets Prepare wall penetrations Prepare wall penetrations Alternate Field Supplied OptionTermination and fittings 5AMultiple Vent Terminations must also comply with -1A Multiple vent/air terminationsSidewall termination installation Sidewall termination optional concentric ventDescription and usage 9Concentric Vent Dimensional Drawing Multiventing sidewall terminations 12Concentric Vent Sidewall AttachmentVent/air termination vertical Vertical direct venting2Vertical Terminations with Multiple Water Heaters Prepare roof penetrationsVertical termination optional concentric vent Vertical termination installationMultiventing vertical terminations 6Concentric Vent Roof Installation1Vertical Direct Venting w/Room Air Conventional and sidewall ventingGeneral piping information System pipingSystem water piping methods ScaldingPiping components Water chemistryDelta T Single Unit 3Multiple Units Water Tank Supply Gas connections Connecting gas supply pipingPropane gas Natural gasNatural Gas Pipe Capacity Chart Check inlet gas supplyLength of Pipe in Straight Feet for 1/2 PSI Gas pressure Gas valve replacementField wiring 3Low Voltage Field Wiring Connections Inputs Condensate drain Condensate disposalStart-up Check for gas leaks Inspect/fill condensate systemFinal checks before starting the water heater Check flame and combustion Start the water heaterIf water heater does not start correctly Check system and water heater2Operating Instructions Models SNR150-100 -- SNA285-125 3Operating Instructions Models SNA400-125 -- SNA500-125 General Temperature controlProtection features Operating informationWater heater temperature regulation Adjustable control parametersSaving parameters HTR Ignition Sequence of operation1Control Panel Shield control moduleStatus Display Screens Status display screensStatus Display Screens cont’d Maintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Check water heater relief valve Flue vent system and air pipingCheck water system Check expansion tankCheck flame signal Check ignition ground wiring Check burner flameCheck all water heater wiring Check control settingsNiosh stated First Aid Cleaning heat exchangerHandling ceramic fiber materials Oiled bearing circulatorsCheck the following TroubleshootingBefore troubleshooting Check control module fusesAbove 50% No DisplayNo Burner Operation Unit Does Not ModulateTemperature F Resistance Ω Checking temperature sensorsTroubleshooting Flame SequenceNo Flame Ign Fail No FlameRunning GV/RelayFan Speed Low Manual ResetHigh Limit Fan LowSensor Open SwitchFan High Fan Speed HighProgr ParametersWrite EEProm Service BlkWatch Dog Error Low 24 VACGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or ObstructionModel SNA500-125 Gas valve adjustment procedureModels SNR150-100 -- SNA285-125 Model SNA400-125120 VAC DiagramsLOW Voltage

SNA400-125, SNR150-100, SNA285-125, SNR200-100, SNA500-125 specifications

Lochinvar has established itself as a leader in the realm of high-efficiency heating solutions, and its line of condensing boilers, including the SNA500-125, SNR200-100, SNA400-125, SNA285-125, and SNR150-100, exemplifies the brand’s commitment to innovation, efficiency, and reliability.

The SNA500-125 model stands out with its impressive heating capacity, designed for larger commercial applications. Featuring advanced modulating burners, it can precisely adjust its output based on real-time demand, significantly enhancing energy efficiency. The stainless steel heat exchanger ensures robust durability and improved thermal performance, while the integrated controls offer advanced diagnostic capabilities and user-friendly operation.

Next in the lineup, the SNR200-100 serves as a versatile option for mid-sized applications. Its compact design allows for flexible installation, making it a valuable choice for facilities with limited space. The boiler incorporates a high-efficiency combustion system that maximizes fuel utilization, while its low NOx emissions technology aligns with environmental standards, reducing the carbon footprint of users.

The SNA400-125 delivers a robust solution for diverse heating needs, equipped with state-of-the-art modulation technology that not only optimizes efficiency but also offers quiet operation – a crucial feature for facilities where noise reduction is paramount. This model also includes built-in redundancy options, enhancing reliability during peak operational periods.

The SNA285-125 provides a balance of performance and efficiency for smaller commercial settings. Its innovative control system offers precise temperature management and easy integration with existing systems. Energy Star certified, this model is not only cost-effective but supports sustainability efforts in various industries.

Lastly, the SNR150-100 is ideally suited for light commercial applications, featuring a compact footprint and excellent heat transfer capabilities. The user-friendly interface and robust safety features make it an excellent choice for operators prioritizing both ease of use and reliability.

All these models incorporate Lochinvar's commitment to superior design and advanced technologies, setting a benchmark in the high-efficiency heating market. With a focus on long-term performance and compliance with modern environmental standards, Lochinvar continues to deliver top-tier solutions tailored to meet diverse customer needs. Whether for large-scale operations or smaller settings, these boilers represent a significant advancement in commercial heating technology.
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