Lochinvar SNA400-125, SNA500-125, SNR200-100, SNA285-125 2Clearance to Gravity Air Inlets

Page 19

TM

Installation & Service Manual

3Sidewall direct venting (continued)

Vent/air termination – sidewall

Figure 3-1CAlternate Venting Arrangement (if Space Allows) w/Field Supplied Fittings

TO BOILER

INTAKE AIRCOUPLING

CONNECTION

12” MIN

15” MAX

FROM BOILER

VENT PIPE

CONNECTION

BIRD SCREEN

12”

MIN

BIRD

SCREEN

ALTERNATE VENTING ARRANGEMENT

(IF SPACE PERMITS)

5.Maintain clearances as shown in FIG.’s 3-1A thru 3-3B, pages 18 and 19. Also maintain the following:

a.Vent must terminate:

•At least 6 feet from adjacent walls.

•No closer than 12 inches below roof overhang.

•At least 7 feet above any public walkway.

•At least 3 feet above any forced air intake within 10 feet.

•No closer than 12 inches below or horizontally from any door or window or any other gravity air inlet.

b.Air inlet must terminate at least 12 inches above grade or snow line; at least 12 inches below the vent termination; and the vent pipe must not extend more than 24 inches vertically outside the building.

c.Do not terminate closer than 4 feet horizontally from any electric meter, gas meter, regulator, relief valve, or other equipment. Never terminate above or below any of these within 4 feet horizontally.

6.Locate terminations so they are not likely to be damaged by foreign objects, such as stones or balls, or subject to buildup of leaves or sediment.

Figure 3-2Clearance to Gravity Air Inlets

12"

MIN.

VENT / AIR

TERMINATION

12" MIN.

12" MIN.

Figure 3-2BAlternate Clearance to Gravity Air Inlets w/Field Supplied Fittings

Figure 3-3AClearance to Forced Air Inlets

IF LESS

THAN 10’

VENT / AIR

36"

TERMINATION

MIN.

 

FORCED AIR

INLET

7' MIN. ABOVE ANY PUBLIC WALKWAY

Figure 3-3BAlternate Clearance to Forced Air Inlets w/Field Supplied Fittings

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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 Remove water heater from wood pallet Flooring and foundationPrevent 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 ventingCanada Venting and combustion airVent pipe and fittings Air inlet pipe materials Air intake/vent connectionsRemoving from existing vent Vent LengthVent and air piping Vent Size If using the alternate sidewall terminationSidewall direct venting Vent/air termination sidewall2Clearance to Gravity Air Inlets Prepare wall penetrations Alternate Field Supplied Option Prepare wall penetrationsTermination and fittings 5AMultiple Vent Terminations must also comply with -1A Multiple vent/air terminationsSidewall termination optional concentric vent Sidewall termination installationDescription 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 ScaldingWater chemistry Piping componentsDelta T Single Unit 3Multiple Units Water Tank Supply Gas connections Connecting gas supply pipingPropane gas Natural gasCheck inlet gas supply Natural Gas Pipe Capacity ChartLength of Pipe in Straight Feet for 1/2 PSI Gas pressure Gas valve replacementField wiring 3Low Voltage Field Wiring Connections Inputs Condensate drain Condensate disposalCheck for gas leaks Inspect/fill condensate system Start-upFinal 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 informationAdjustable control parameters Water heater temperature regulationSaving parameters HTR Ignition Sequence of operation1Control Panel Shield control moduleStatus Display Screens Status display screensStatus Display Screens cont’d Service technician Maintenance Maintenance and annual startupOwner 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 Sequence FlameNo 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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