Mills 3500A Burners
The forced draft flame retention burners for light oil, gas or gas-oil firing are U.L. certified and have been custom designed for optimum performance in each size 3500A unit. All burners have prewired burner mounted controls with standard low fire start, high fire run and two position air control.
Burner specification sheet lists standard and optional burner components. Burners can be furnished for lo-hi-lo and full modulation firing, and equipped with control systems to comply with most insurance and state or local code requirements.
STANDARD EQUIPMENT
All Units
- Foundation front plate completely cut and tapped.
- Insulated metal jacket.
- Pre-cast combustion chamber complete with insulating blocks.
- Return yoke with flexible seals.
- Two 1 1/2" drain valves with pipe and fittings.
Steam Units
- Manual reset high-pressure limit control.
- Operating pressure control.
- Syphon, pipe tree for control mounting including inspector's gauge cock.
- ASME side-outlet safety valve set at 15 psi.
- Combination water column, low water cut-off and pump controller with piping.
- 41/2!1 pressure gauge.
Oil Units
- Pressure-atomizing oil burner Clow-high-off) fire-tested at the factory.
- Prewired burner-mounted controls.
Water Units
- Manual reset high-temperature limit control.
- Operating temperature control.
- ASME relief valve set at 40 psi.
- Low water cut-off and piping.
- Pressure-altitude gauge.
- Mercury column thermometer.
- Dip tube.
- Air removal fitting.
- Manual air vent valve.
Gas Units
- Forced draft flame retention power bummer.
- Prewired electronic bufier-mounted control panel with numbered terminal strip (115V, 1 phase, 60 Hz control circuit).
- U.L. approved gas train.
Combination Gas/Oil Units
- Forced draft pressure atomizing flame retention combination gas/oil bummer.
- Prewired electronic bummer mounted control panel with numbered terminal strip (115V, 1 phase, 60Hz control circuit).
- U .L. approved gas train.
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- Combination water feeder and low water cut-off. (Steam boilers only, piping not included).
- Field draft control for natural draft units in the following sizes: 12" (6 section), 14" (7 section), 16" (8-10 section) and 18" (11-14 section).
- Induced draft fan- Wing or Auburn. Fan systems are equipped with constant speed 1,750 rpm, 60-Hz motor. Adjustable pitch sheaves are used to achieve fan speed regulation.
- Draft control panel which includes magnetic starter, prepurge and draft safety switch and eight-point terminal block (I phase) or 12-point, terminal block (3 phase) installed and wired in panel box suitable for wall mounting. Red warning light (for low draft condition) in cover.
- Field draft controls with special mounting collars are available for Auburn and Wing fans.
- Start-up and one year's service.
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Mills 3500A Brochure (241K)
