HEATING COMPONENTS 1 Robertshaw® proprietary and confidential ©2014 Ignitors Pilots / Thermocouples / Thermopiles Air Pressure Sensing Switches Heating Kits Manufacturers Comparison Literature Website Q&A Universal Ignitor Kits Product Advantages Silicon Nitride Ignitors Product Features Manufacturer Analysis Hot Surface Igniter Types Robertshaw® 41-400 Series Silicon Carbide Robertshaw® 41-400N Series Silicon Nitride (stronger) Robertshaw ® Universal 41-800 Series Kitted with brackets and screws Kits include mounting brackets and hardware for contractor convenience Low cost and universal usage Packaging is clam shell style for additional protection Peg board ready Replaces 130 competitor parts See Sell Sheet 150-2185B for cross reference charts 41-803 is a GOOD offering Silicon Carbide for good physical strength Double helix spiral uses less current 1 Year Warranty 41-801N is a BETTER offering Silicon Nitride technology for better durability Rod shaped heating element 2 Year Warranty 41-802N is the BEST offering Ultimate Silicon Nitride for best durability Made by Kyocera™ Flat blade heating element Best heat dissipation 3 Year Warranty What is Silicon Nitride? A light, hard material with low thermal expansion coefficient Typical characteristics of Silicon Nitride (SiN) include: High Mechanical Strength Fracture resistance – stronger than Silicon Carbide Good thermal shock resistance Good chemical resistance Resistant to deformation at room and elevated temperatures Longer Usable Life Unlike Silicon Carbide which has a porous construction, Silicon Nitride is non porous and does not oxidize with age Silicon Nitride ignitor elements can be cleaned with tough cleaners and can withstand strong alkali’s and acids Due to its outstanding performance, Silicon Nitride offers peace of mind to the home owner when the temperatures dip into the low teens during the winter months 2 Year Warranty 17 seconds or less to operating temperature – 1800°F All ignitors are 120V AC Ignitors are kitted with mounting hardware and OEM termination or ceramic wire nuts Durable, robust and resistant to dirt and oil High temperature leads for wire protection Flame sensor required for all Silicon Nitride ignitors Less breakage during installation and servicing 12 SKUs available Trusted Robertshaw® brand Feature Robertshaw® Crystal Technica MARS® Series 41-400N Glo-Stix 120- 67900 400 Supco SSN2000 Replacement OEM Hardware OEM Termination Passes 2 Meter Drop Test NA Pros and Cons Robertshaw® Competition Replacement OEM Hardware Easier installation ensuring that the igniters is placed in position Correctly Hardware with multiple holes making it less durable with variation in the placement of the hot zone OEM Termination Quick tool free installation Longer install time Passes 2 Meter Drop Test Durability for easier installation and handling Fragility defeats one of the purposes of SiN What allows silicon nitride igniters to work in HVAC Heating applications? □ Low thermal expansion coefficient □ High Mechanical Strength □ Fracture resistance □ All of the above Silicon Carbide has a porous construction, Silicon Nitride is non porous and does not oxidize with age? □ True □ False Pilot Basics • Robertshaw® 1820 Series with Left or Right flame pattern type • Pilot Uni-Kits® are with or without thermopile pre-mounted •Used On DC CURRENT AC CURRENT Flame Rod (Smaller) Flame Ground (Larger) PILOT / BURNER – IPI Intermittent Pilot Ignition – DSI Direct Spark Ignition – HSI Hot Surface Ignition How it Works • Rectifies AC Current into DC • Requires flame to ground • Proves pilot or burner ignition GND “Hot” Junction Copper-Nickel Alloy Copper-Iron Alloy “Cold” Junction Insulated Copper Wire Copper Sheath Contact Button UUUUUUU Load (Safety Magnet) Fitting Nut Contact Button • The 1980 series offers easy installation into most pilot burners • Uses Snap-Fit® technology • End of part number refers to various lengths: • 1980-012 is 12 inches • 1980-072 is 72 inches • The 1950 series thermopiles have two lead wire connections and are primarily used in HVAC • The 1951 coaxial series used on Commercial Cooking Twin lead wires • Monitors Air Pressure – – – – – Conditioned Air Filters Defrost Cycle in Refrigeration Coils Gas-Fired Units with Draft from the Blower Air-Supported Structures and Enclosures Exhaust Fans and Fume Hoods • • • • • • • NEMA NC NO PSI SPST SPDT WC = = = = = = = National Electrical Manufacturers Association Normally Closed (switch) Normally Open (switch) Pounds per Square Inch Single Pole Single Throw Single Pole Double Throw Water Column in Inches • Reliable devices to remotely sense operation of – Fans – Blowers • Senses positive, negative or differential air pressure – Maximum pressure 10.0“ Water Column • Adjustable air sensing actuates internal switch • Types of switches – SPST = Single Pole Single Throw – SPDT = Single Pole Double Throw • Robertshaw line up of air pressure switches is Simply the Right Choice™ for flexibility, reliability, accuracy and ease-of-use • With a wide array of applications, the 2374-510 kit replaces hundreds of other manufacturers’ air pressure switch models • HVAC contractors now have a one-stop option to meet all their air pressure switch needs • This latest addition to the Robertshaw product line includes: • • • • • High impact polycarbonate housing Works in a variety of harsh conditions Snap-acting switch with three male 90º quick-connect terminals Field adjustable set points ranging from 0.10” to 10” WC Installers use 10-650 sensing probe kit for hard-to-reach air streams • Sensing switch 2374-510 is field adjustable • Relatively insensitive to temperature • Range includes -40°F to 190°F • Operates at 120 or 277 VAC • Detection of static pressure drop across filters and coils • Air switches can turn ON or OFF the following • • • • • • • Blowers Exhaust Fans Electronic air cleaners Remote status indicators Alarms Control circuits And more •Sensing Switch 2374-510 contractor kit includes the following: – – – – Calibration Springs (5 options within 0.05” to 10.0” WC) Orifice Restrictors (4 options) Mounting Brackets (2 options) Calibration adjustment tool (hex wrench) • Easy installation and calibration • 2 Year Warranty • Housing is made of plastic to compete on price •When extended tube is needed for hard-to-reach air streams use Robertshaw® Sensing Probe Kit 10-650 •Probes are used in conjunction with the air switch as a means to sense air pressure in the appliance • Probes are mounted in: • • • • • Ducts Intakes Vents Pressure Control Rooms All HVAC Applications Typical Applications For Sensing Switch and Sensing Probe Kit 1 Positive static pressure increases as the filter gets dirty. 2* Differential across filter changes as filter gets dirty. 3 Flow is reduced as filter gets dirty. 4 Fan operation or air flow with little or no static pressure. 5 Negative pressure increases as the filter gets dirty. 6* Fan operation and true air flow with varying amounts of static pressure. Probes must be perpendicular to the air flow. * Applications uses two Sensing Probe Kits Fan Filter Fan Filter Fan SPDT switch stands for what? 1. 2. 3. 4. Single Pole Differential Terminal Single Polarity Dip Termination Single Pole Double Throw Single Pole Single Throw • • • • • • Robertshaw® 2374 series Honeywell® IS2 series Micro Pneumatics Logic® MPL 9370 series Endura® ES2000 series White-Rodgers® Siemens® Features Robertshaw® Honeywell® MPL® Endura® 2374-510 IS2 MPL9370 ES2000 Complete Installation Kit Full Line of Replacement Switches Self Cleaning Contacts Series Wider Operating Range (up to 10.0 “ W.C.) (3” W.C.) (2” W.C.) Product cross references at www.uni-line.com (5” W.C.) Robertshaw® Competition Complete Installation Kit Easier Installation with all Necessary Hardware and Tools Included Incomplete Kit Complicates Installation Full Line of Replacement Switches One Source for All Major Replacements with Cross Reference Charts Multiple Suppliers Needed and Possible Obsolescence Self Cleaning Contacts Helps Resist Welding from Arcing Switch May Stick and Need Service Calls Rated for More Applications Rated for Fewer Applications Made in the USA Majority Imported Pros and Cons Wider Operating Range US Jobs Value Proposition Wholesaler / Distributor Contractor End-User Complete Installation Kit “One Stop Shop” Offering Includes Hardware & Tool “Grab and Go” No Need to Wonder About Right Installation Tools “Hi and Bye” Installer Minimizes Disruption Full Line of Replacement Switches Limits Need for Carrying Several Suppliers Full Selection From One Source Installer has Right Part Regardless of Application Upsell Reliability Opportunity Limits Call Backs Reliable Operation to Minimize Future Service Calls Additional Feature to Sell Wider Range of Applications Quality Product Self Cleaning Contact Wider Operating Range Cross Reference available online at: www.robertshaw.com/Products/Cross-Reference • Sell Sheets with Cross Reference Charts – Part Number in English: 150-2314 Literature available online at www.Uni-Line.com UNI-KIT 360 MILLIVOLT KIT Millivolt Heating Kit Uni-Kit 360 Heating Repair Kit Applications Sales Support Tools Millivolt Kit is updated New pricing New packaging New mercury-free thermostat Universal Kit 360 All universal parts Replaces 1600 parts in field Reduces inventory with easy-to-order SKU Reduces installation time with right parts Gas Valve 710-502 Thermostat 986-1R Pilot 1820-009 Plus Free Pocket Guide Low capacity gas valve 710-502 used in space heaters Designed for natural gas applications Natural gas max 70,000 BTU, ½” inlet and outlet Nat to LP conversion kit 1751-013 included Economy mechanical Robertshaw® thermostat 986-1R Simply reliable with easy installation 24V AC with UL Listing Robertshaw® 1820-009 with 90° right flame pattern Pilot Uni-Kits® with thermopile 1950-532 pre-mounted Replaces ITT-General part number PG9A42JTL02 Wall Thermostat Gas Cock Safety Pilot Line Operator Pilot and Thermopile Safety Magnet OPERATOR TH/TP R TP W Safety Magnet OPERATOR TH/TP TP TP R W TH 1950 Series Two-Lead Thermopile TH 1951 Series Coaxial Thermopile Gas Valve Ignition Control Module Nitride Ignitor Flame Sensor Air Pressure Sensing Switch Plus free tools Robertshaw® Toolbag Robertshaw® Screwdriver Pocket Guide Cross Reference Guide Reorder form Gas Valve 720-079 Universal model Intermittent Pilot Direct Spark Hot Surface 150,000 BTU, ½” inlet and ¾” outlet Factory set at 3.5” W.C. for natural gas Can be converted to LP with conversion kit included Universal hot surface ignition module kit 780-910 Designed for gas fired systems Diagnostic green LED for quick troubleshooting Kit includes all necessary hardware Replaces most hot surface modules manufactured by Robertshaw®, Honeywell® and White-Rodgers® Local or remote sensing 120V AC units Hot Surface Igniter Types Silicon Nitride Silicon Carbide (fragile) Robertshaw® 41-802N Silicon Nitride Brackets included Flame Sensor 10-760 Rod can withstand 1800 °F Rod is 4” and can be cut and bent Replaces White-Rodgers 760-401 56 Universal Air Pressure Sensing Switch 2374-510 Senses air flow from 0.10” to 10.0” W.C. Switch controls wide variety of HVAC applications Kit includes springs, orifices, mounting bracket Calibration hex tool included Robertshaw® replaces 1,600 solutions Not all kits have the same parts Uni-Kit 360 equivalents: 50M56U-843 White-Rodgers ® Y8427U9045 Honeywell® Natural Gas or Liquid Propane Inlet and Outlet Size BTU Requirement Ignition Method being Used Outlet Pressure Setting Requirement Ambient Temperature Orientation of Gas Valve Valves should not to be mounted upside down Actuator Type: Manual, Millivolt, Voltage, Hydraulic Opening and Closing Speed of Gas Valve Condition Flame Too Large Noisy Flame Yellow Tip Flame Floating Flame Possible Cause Possible Cure 1. Outlet pressure too high 1. Adjust regulator 2. Defective regulator 2. Replace regulator 3. Orifice too large 3. Replace Orifice 1. Excessive primary air 1. Adjust air shutter 2. Noisy Pilot 2. See Pilot Troubleshooting slide 3. Burr in orifice 3. Remove burr or replace orifice 1. Too little primary air 1. Adjust air shutter 2. Clogged burner ports 2. Clean burner ports 3. Misaligned orifice 3. Realign orifice and burner 1. Blocked venting 1. Inspect vent and clean 2. Insufficient primary air 2. Adjust air shutter Condition Delayed Ignition Failure to Ignite Burner won’t turn “Off” Rapid Burn Cycles Possible Cause Possible Cure 1. 2. 3. 4. Improper ignition location Pilot flame too small Burner ports clogged Low outlet pressure 1. 2. 3. 4. Reposition ignition source Check orifice and clean Clean burner ports Adjust pressure regulator 1. 2. 3. 4. Main gas “Off” Poor electrical connections Defective gas valve Defective thermostat 1. 2. 3. 4. Open manual valve Check, clean, & tighten Replace with new Replace with new 1. Poor thermostat location 2. Defective gas valve 3. Defective thermostat 1. Relocate thermostat 2. Replace with new 3. Replace with new 1. Clogged furnace filters 2. Excess t-stat anticipation 3. Poor thermostat location 1. Clean or replace 2. Adjust t-stat anticipator 3. Relocate thermostat When all else fails…check gas supply is in the “ON” position Condition Solution Correct Flame Tip of thermocouple or thermopile is 3/8” to 1/2” into pilot flame Noisy, Lifting, Blowing Flame High gas pressure Wrong Pilot Orifice Lazy Yellow Flame Clogged primary air opening Low gas pressure Clogged pilot orifice Wavy Blue Flame Draft condition as pilot Hard Sharp Flame High gas pressure Pilot orifice too small Small Blue Flame Wrong pilot orifice size Low gas pressure Clogged pilot tube Open circuit 25 to 30 Millivolts HOT JUNCTION 30 MV COLD JUNCTION CONTACT BUTTON MILLIVOLT METER Hot Junctions Cold Junctions UUUUUU Load (Safety Magnet) UUUUUU Load (Gas Valve) 1950 Twin Lead Connector • • • Problem # 1: Hot Surface Igniter Does Not Glow Red Possible Causes – No main power – Faulty Transformer – Faulty Thermostat- check call for heat – Faulty Limit Switch – Faulty blower interlock switch – Faulty hot surface igniter – Faulty ignition control – Remember to wait for purge time, 17 or 34 seconds Troubleshooting – With power on and thermostat at its highest position, check voltage between “TH” and “TR” on HS780 module. • • – If 24 Volts not present, check transformer output If no 24 Volts present on secondary side, change transformer Check for 120 Volts at the igniter across “IGN” and “GND” • • If voltage present, change igniter If no voltage present, change module • • • Problem # 2: Igniter Glows Red but Main Burner Will Not Light Possible Causes – Improper Igniter or Sensor Alignment – Faulty Ignition Control – Faulty Gas Valve – High Inlet Gas Pressures – Polarity Reversed – No Earth Ground Troubleshooting – Check availability of gas at gas valve. Make sure valve upstream is in the Full On position. Check pressure ok. – Check “GRD” and “PV/MV” by reversing wires • If reversed the gas valve will not open. – Check proper ignition position and properly grounded – Check for 24 Volts at gas valve terminals – “1” and “2” on a 7200 series, “TH” and “TR” on a 7000 series • If Yes, check wire resistance or change gas valve • If no, change the 780 series module • • • Problem # 3: Main Burner Shuts Off before the Thermostat is Satisfied Possible Causes – Improper Igniter or Sensor Alignment – Faulty Ignition Control – Contaminated Igniter and/or sensor – Bad burner ground Troubleshooting – Check polarity – Check for proper igniter position – Check for proper ignition control grounding – Visually inspect igniter and remote sensor for any contamination. • Clean and replace – Check main burner ground – If above steps are ok, replace igniter • • • Problem # 4: Main Burner Does Not Shut Off When Thermostat is Satisfied Possible Causes – Faulty Gas Valve – Faulty Ignition Control Troubleshooting – Check thermostat to make sure contacts are open – Check for 24 Volts between “TH” and “TR” • Should be Zero, if gas valve is stuck open, replace valve – Check for 24 Volts between “PV/MV” and “GND” • If 24 Volts present, replace ignition control • If 24 Volts not present, replace gas valve Telephones: Technical Service 1-800-445-8299 Technical Service Fax 1-630-260-7294 Customer Service 1-800-304-6563 Customer Service Fax 1-800-426-0804 Websites: Uni-Line® Catalog: www.robertshaw.com/Uni-Line Cross Reference: www.robertshaw.com/Products/Cross-Reference Toolbox: www.robertshaw.com/toolbox/Toolbox-Main General Information for: Robertshaw®, Paragon®, Ranco®, Uni-Line® and Publication Zone® Robertshaw®, Paragon®, Ranco®, Uni-Line®, and Make the Connection™ are propriety marks of Robertshaw or its subsidiaries. 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