• Interrupted ignition type
• Combine a Protectorelar unit for cycling the burner and a Pyrostat flame detector for sensing temperature changes of flue gases up to 1000 deg F
• Manual reset of safety switch required after ignition failure completely shuts off main burner
• Include manual trip safety switch to assure burner shutdown during servicing
• Mount with flange for mounting on curved or flat surfaces
• Works with 2-wire and 3-wire 24 VAC thermostat
• 2 years warranty

• Interrupted ignition type
• Combine a Protectorelar unit for cycling the burner and a Pyrostat flame detector for sensing temperature changes of flue gases up to 1000 deg F
• Manual reset of safety switch required after ignition failure completely shuts off main burner
• Include manual trip safety switch to assure burner shutdown during servicing
• Mount with flange for mounting on curved or flat surfaces
• Works with 2-wire and 3-wire 24 VAC thermostat
• 2 years warranty

• Remanufactured with 100% pure, solid silver pyrostat contacts for longer on-the-job service life
• Backed by 2-year warranty
• All new stack relays contain brass contacts covered with a slight silver plating, it wears off as the contacts open and close, exposing the brass surface over time, the exposed surface is a poor conductor and may result in relay failure and nuisance callbacksSid Harvey Item #:R5R: Replaces Part #:'s : 0R541R,
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• Eliminates necessity to manually add water to the boiler
• Can be used with mechanical or electronic low water cut-off controls
• Quick-change replaceable cartridge valve and strainer
• Manual feed button Mcdonnell & Miller 169400 Electric Water Feeder, 2350000 BTU/hr Output, Import,
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• Continuous maintenance of minimum safe water level, independent of electrical service
• Proportional feed action
• Quick hook-up fittings provided
• Quick change replaceable cartridge valve and strainer
• Model 47 can be field upgraded with a No #2 switch to add low water cut-off function Mcdonnell & Miller 47-2 Mechanical Water Feeder, 3/4 Inch NPT Threaded, 120/240 VAC,
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• Continuous maintenance minimum safe water level, independent of electrical device
• Direct action feeder mechanism
• Quick hook-up fittings provided (new only)
• Quick-change replaceable cartridge valve and strainer
• Quiet, durable operation
• Isolated feed valve minimizes lime and scale build-up
• Blow-off valve
• Burner switch cut-off,
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• Quick hook-up fittings provided
• Lever operated, full port ball valve for easy blow down
• Adjustable Bx outlet for easy installation
• Dual precision switches for dependable operation of cut-off, alarm or electric water feeder Mcdonnell & Miller 67 Mechanical Low Water Cut-Off, 120/240 VAC, 20 psi, Automatic Reset,
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Aprilaire 2210D1