Laars NEOTHERM NTH Installation And Operation Instructions Manual

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Laars NEOTHERM NTH Installation And Operation Instructions Manual Manual pdf 31 page image

NeoTherm Boiler Page 311/16 of a revolution increments until the CO2 iswithin the range identified.3. Measure the CO2 /O 2 in the flue products at lowfire. NeoTherm can be forced to low fire to allowfor easier setup. Refer to Section 5.2.3 forinstructions on how to access the forced rate menu.CO 2 readings should be between the values shownin Table 13. If the CO 2 is not within the rangeshown, adjustments may be made. To adjust thelow fire CO 2 , locate the low fire adjuster screwaccording to the appropriate figure. Slowly makeadjustments in 1/16 of a revolution incrementsuntil the CO 2 is within the range identified.4. Repeat steps 2 and 3 to confirm that the CO2ranges are within the required ranges. Adjust ifnecessary.5. Confirm that the differential pressure is still withinthe appropriate range.6. If any of the measurements cannot be adjusted tothe specified ranges or the CO levels are above150ppm when adjusted please consult the factoryFigure 25B. NeoTherm Gas Valves (600, 750 and 850).600750, 850for further information.7. Remove the differential pressure gauge from theair and gas pressure taps making sure to close allports after the gauge has been removed.WARNINGImproper adjustment may lead to poor combustionquality, increasing the amount of carbon monoxideproduced. Excessive carbon monoxide levels maylead to personal injury or death.6.3 Shutting Down NeoTherm1. Turn off the main electrical disconnect switch.2. Close all manual gas valves.3. If freezing is anticipated, drain NeoTherm and besure to also protect building piping from freezing.All water must be removed from heat exchanger ordamage from freezing may occur.This step to be performed by a qualified service person.6.4 To Restart NeoThermIf drained, follow Section 6.1 in this manual forproper filling and purging.1. Turn off the main electrical disconnect switch.2. Close all manual gas valves.3. WAIT FIVE (5) MINUTES.4. Set the aquastat or thermostat to its lowest setting.5. Open all manual gas valves.6. Reset all safety switches (pressure switch, manualreset high limit, etc.).7. Set the temperature controller to the desiredtemperature setting and switch on electrical power.8. Burner will go through a prepurge period andignitor warm-up period, followed by ignition.SECTION 7.MaintenanceWARNINGDisconnect all power to the appliance beforeattempting any service to the appliance. Contact withelectricity can result in severe injury or death.7.1 System Maintenance (Yearly)1. Lubricate the system water-circulating pump, ifrequired, per the instructions on the pump.2. If a strainer is employed in a pressure reducingvalve or the piping, clean it every six months.3. Inspect the venting system for obstruction orleakage at least once a year. Periodically clean thescreens in the vent terminal and combustion airterminal (when used).4. Keep the appliance area clear and free fromcombustible materials, gasoline, and otherflammable vapors and liquids.