Showing 2001–2025 of 2146 results
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Read moreOverview Microprocessor-based integrated burner control for automatically fired gas, oil, coal or combination fuel single burner applications. Provides safety, functional capability and features beyond conventional controls. Features Functions include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and troubleshooting. Access for external electrical voltage checks. Application flexibility and communication interface capability. Five LEDs provide sequence information. Five function Run/Test Switch. Interchangeable plug-in flame amplifiers. Local or remote annunciation of RM7840 operation and fault information. Nonvolatile memory retains history files and lockout status after loss of power. Compatible with existing Honeywell flame detectors. Product Specifications ApplicationProgramming ControlDimensions (in.)5 in. wide x 5 in. high x 5 1/4 in. deep with Q7800A Subbase x 6 3/32 in. deep with Q7800B SubbaseDimensions (mm)127 mm wide x 127 mm high x 133 mm deep with Q7800A Subbase x 155 mm deep with Q7800B SubbaseWeight (lb)1 lb 13 ozWeight (kg)0.8 kgCommentsLHL-LF&HF ProvenFrequency50 Hz; 60 Hz (±10%)Approvals, Underwriters Laboratories Inc.Component Recognized, File No. MP268; Guide No. MCCZ.Approvals, CSACertified, File No. LR95329-3.Voltage120 Vac (+10, -15%)Shipping and Storage Temperature Range (F)-40 F to +140 FShipping and Storage Temperature Range (C)-40 C to +60 CApprovals, Federal Communications CommissionFCC Part 15, Class B, Emissions.Flame Establishing Period – Pilot4 sec or 10 secFlame Establishing Period – Main10 sec or IntermittentInterlocksLockoutPreignitionYesPrePurgeDetermined by ST7800A Purge Timer CardPostPurge15 secEarly Spark TerminationYes, 5 secRequired ComponentsQ7800A,B Universal Wiring Subbases. R7847, R7848, R7849, R7851, R7852, R7861, or R7886 Flame Signal Amplifier. ST7800A Plug-in Purge Timer Card.AirFlow CheckUser selectableSecond Stage Pilot ValveIntermittentPilot TypeinterruptedVibration0.5 G environmentApprovals, Control Safety DevicesAcceptable: CSD-1Approvals, Swiss REAcceptableApprovals, Factory MutualReport No. OX4A5.AF.
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Overview Primary control provides solid state, electronic flame safeguard protection for industrial and commercial single or dual fuel burners applications using Ultraviolet flame detectors. Features Design for interrupted ignition with intermittent pilot on gas burners, and interrupted or intermittent ignition on oil burners. Use with a C7027, C7035 or C7044 Minipeeper Ultraviolet Flame Detector for flame sensing. Recycles if flame signal lost while in Run. Failure to establish pilot results in a lockout. Safe-start check prevents start-up if flame-simulating failure occurs in flame detector circuit. Includes SPDT alarm contacts. Solid state circuitry, eliminates warm-up and increases resistance to vibration. Mounts and removes easily through use of captive mounting screws. Mounting bas
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Overview Solenoid-operated diaphragm valves provide slow opening and fast closing suitable for controlling natural, LP or manufactured gases. They are normally used on atmospheric boilers, commercial water heaters, and rooftop heaters. Features V48 for line voltage service; V88 for 24Vac service. Close firmly with diaphragm that is both weight and spring loaded. Two second maximum closing time. Valve closes on power failure; recommended for final shutoff service. Set opening time with various sized bleed orifices or adjustable bleed valve. Use with LP, natural or manufactured gases. Made with cast aluminum in straight-through valve pattern. Valve position indicator available for 1-1/4 in. V48A2227. Product Specifications Dimensions (in.)6 1/16 in. high x 4 5/16 in. wide x 5 in. deepDimensions (mm)154 mm high x 127 mm wide x 109 mm deepMaterialsBody–AluminumMountingUpright (horizontal)Frequency60 HzApprovals, Underwriters Laboratories Inc.File No. MH1639, Guide No. YIOZApprovals, Canadian Standards AssociationCertificate No. 158158-2500005576 (Z21.21-CSA 6.5)Electrical Connections6 in. LeadwiresPower Consumption9 W; 15 VA maxVoltage24 VacOperating Temperature Range (F)32 F to 125 FOperating Temperature Range (C)0 C to 52 CCurrent Ratings0.62 max amps at rated Vac/HzBody PatternStraight-throughPressure Ratings (psi)1/2 psiPressure Ratings (kPa)3.4 kPaType of FuelNatural; LP; ManufacturedPipe Size (inch)1 in.Pipe Size (DN)DN25Bleed Tapping1/8-27 NPTPilot Tapping1/8-27 NPTValve Opening Time5 sec maxValve Closing Time2 sec max
