The SmartValve® System Controls combine gas flow control and electronic intermittent pilot sequencing functions into a single unit. The Q3450 or Q3480 Pilot hardware supplies the low voltage igniter, flame sensor and pilot burner. These ignition system controls provide all gas ignition safety functions by controlling gas flow, ignition source, and a 120 Vac or 240 Vac combustion air blower. The controls also monitor the appliance airflow proving switch and limit string to assure proper appliance operation, and provide prepurge, postpurge, and timed trial for pilot ignition with 100 percent shutoff and continuous retry. Includes a diagnostic LED indicates system status.
- These controls communicate directly with an electronic fan timer (ST9160 Electronic Fan Timer for single stage applications; ST9162 Electronic Fan Timer for two-stage applications) in typical forced warm air furnace applications.
- It can directly interface with the appropriate power supplies and a system thermostat for additional appliance applications.
- When controlled directly by a thermostat, these controls do not provide a postpurge function, because power to the control is removed when the thermostat call for heat ends.
- The Systems are suitable for a wide range of fan-assisted combustion gas-fired appliances including furnaces, rooftop furnaces, boilers, unit heaters, infrared heaters, water heaters and commercial cooking appliances.
Dimensions (in.)3.2 in. wide x 4.9 in. high x 4.1 in. longDimensions (mm)81 mm wide x 124 mm high x 104 mm longIncludesTwo 3/4 x 1/2 in. reducer bushings; Natural to LP Conversion KitItem TypeProductMounting0 to 90 degrees in any direction from the upright position of the gas control knob, including vertically.Electrical Ratings24 VacFrequency50 Hz; 60 HzApprovals, Canadian Standards AssociationCSA International: 112395Tradeline ValueUniversalFlame Failure Response Time (sec)1.6 sec @ 3 µAPrePurge15 secondsPostPurge30 secondsAmbient Temperature Range (F)-40 F to +175 FAmbient Temperature Range (C)-40 C to +79 CIgnition System TypeIntermittent Hot Surface Pilot IgnitionIgnition SequenceIntermittent PilotType of GasNaturalFlame SenseHSIIgnition SourcePilotIgnition Trials To Lockoutcontinuous retryIgnition Trial Time (sec)90 secTypical Ignition HardwareQ3450; Q3480Body PatternStraight-throughOpening CharacteristicsStandardPressure Regulator Setting (psi)3.5 in. WCPressure Regulator Setting (kPa)0.87 kPaPressure Ratings (psi)1/2 psiPressure Ratings (kPa)3.5 kPaInlet/Outlet Size (in.)3/4 in. NPT x 3/4 in. NPT.Pilot Gas OutletYesCapacity (ft³/hr)Maximum at 1 in. P.D.--300 ft³/hr; Maximum--415 ft³/hr; Minimum--30 ft³/hrCapacity (m³/hr)Maximum at 1 in. P.D.--8.5 m³/hr; Maximum--11.8 m³/hr; Minimum--0.8 m³/hrPressure Tapping1/8 in. - NPT