Laars JVS Installation And Operation Instructions Manual

Laars JVS Installation And Operation Instructions Manual Manual pdf 4 page image

LAARS Heating SystemsPage 41. Plumbing materials for the bypass piping, whichis required for:a. Any system where the return watertemperature may be less than 120°F, suchas in-floor radiant systems, snow meltsystems or other systems where a “coldstart” is expected frequently due tothermostat setbacks, etc. See Figure 11.b. Any system where the temperature riseacross the heat exchanger is above 30°F(see Section 5 and Figure 7).2. Combustion air grates for openings sized inaccordance with Section 3.1.3. Field interlock wiring for any motorizedcombustion air louvers to ensure the boiler doesnot fire if motorized louvers do not open.4. A suitable non-combustible base if installed on acombustible floor (see Section 2.3.2)1.5.3 Diagnostic ToolsThe following materials are needed to verifycorrect installation:1. Gas manometer to verify gas pressure2. Strap-on, digital or infrared thermometer tocheck temperature rise across the heat exchanger.3. Suggested: Draft gauge and combustion testequipment.1.6 Specifications1.6.1 General Specifications1. Installation Location:Certified for use in Indoor Applications only2. Minimum Clearance From CombustibleMaterial:See Table 1 in Section 2.3.1.3. Supply Gas Type:Certified for use with Natural Gas and LP Gas4. Gas Pipe/Boiler Gas Valve Connection:Nat LP50-225 ½" NPT ½" NPT5. Inlet Gas Supply Pressure:Minimum MaximumNatural Gas: 5.5" WC 10.5" WCLP Gas: 10.0" WC 13.0" WC6. Water Pipe/Boiler Connection:1 ¼" NPT7. Water Flow Rate:See Table in Section 5.28. Pressure Relief Valve:30 PSI9. Recommended system pressure:12 PSI10. Exhaust Vent Connection Size:50 4" Diameter75-100 5" Diameter125-160 6" Diameter225 7" Diameter11. Electrical Supply:115 Volts AC12. Modification of Boiler for High Altitude:Mini-Therm II Boilers are normally shippedfrom the factory in the low altitude (sea level)operational configuration. When requested, theboilers can be configured and shipped for higheraltitudes. For field conversions to change altitudeconfigurations, conversion parts are availablefrom Laars. For more information or call theCustomer Service Department.1.6.2 DimensionsSee Figure 1 for a diagram showing the boiler’sexterior dimensions and dimensions to criticalconnections on the boiler.SECTION 2.Installation Instructions2.1 IntroductionWARNINGImproper installation or maintenance can causenausea or asphyxiation from carbon monoxide influe gases which could result in severe injury, ordeath.AVERTISSEMENTUne installation ou un entretien in adéquat peutcauser la nausée ou l’asphyxie en raison dumonoxyde de carbone présent dans les gaz decombustion et même entrainer des blessuresgraves ou la mort.Install the Mini-Therm II boilers and ventdampers in accordance with the procedures in thismanual, local codes and ordinances, and in accordancewith the latest edition of the appropriate national code(see Section 1.3 “Codes and Standards”).All gas-fired products require correct installationto assure safe operation. The requirements for boilersinclude the following:1. Field assembly2. Appropriate site location (clearances) andflooring3. Sufficient combustion and ventilation air4. Properly sized gas meter and piping5. Proper electrical wiring (if required)6. Adequate water flowThis manual provides the information needed tomeet these requirements. Review all application andinstallation procedures completely before continuingthe installation.NOTE: The Mini-Therm II boiler is approved for indoorinstallation only.