Ignition Controls - Robertshaw Thermostats

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Igniter Types1. Direct Spark– Spark Rod acts as a Flame Sensor2. Hot Surface– Silicon Carbide (fragile)– Silicon Nitride• Requires Flame Sensor– Mini-Ignitors• Faster Heat Time• Gas Furnace ApplicationsNEW3. Intermittent Pilot– Requires Pilot Valve
Hot Surface Igniters – Silicon NitrideWhat is Silicon Nitride? A light, hard material with low thermal expansion coefficientTypical characteristics of Silicon Nitride include: High Mechanical Strength Fracture resistance – stronger than Silicon Carbide Good thermal shock resistance Good chemical resistance Resistant to deformation at room and elevated temperaturesSelecting Exact OEM Replacement parts in the <strong>Robertshaw</strong> family: Add an “N” to existing silicon carbide part numbers (41-410 41-410N)
Page 4 and 5: Acronyms GND = Ground IGN = Ignitio
Page 6 and 7: Gases Liquid Propane tends to hover
Page 8 and 9: Ignition Control System1. Thermosta
Page 10 and 11: ManufacturersJohnson ControlsWhite
Page 12 and 13: Fenwal Uni-Line® Products Direct S
Page 14 and 15: Ignition Control KitsKits are for C
Page 16 and 17: Aftermarket Opportunities Original
Page 20 and 21: Hot Surface Igniters - Silicon Nitr
Page 22 and 23: Transformers Transformers change AC
Page 24 and 25: Air Pressure Switches The 2374 Seri
Page 26 and 27: Trouble Shooting Tips Problem # 1:
Page 28 and 29: Trouble Shooting Tips Problem # 3:
Page 30: When you have Questions? Technical

Ignition Controls - Robertshaw Thermostats

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