Under 120 MBTU Man Hours 2.5
120-300 MBTU Man Hours 5
300-500 MBTU Man Hours 8
500-700 MBTU Man Hours 24
700-1000 MBTU Man Hours 32
Over 1000 MBTU Man Hours 40
Application:
Hot air furnaces are used primarily to heat, but can be used with refrigerant
coils to cool or as a backup for heat pump applications using multi-speed fan
motors. The furnace is equipped with a gas/oil burner that is serviced by using
PM Inspections BURNERSG-A/BURNERO-A. The housing contains the burner, heat
exchanger, circulating fan, fan motor, controls and safeties. If equipped with a
humidifier, it is serviced using PM Inspection HUMDSYS-A. These units can be
horizontal or vertical, heating only or heating/cooling. Cooling would be
provided by utilizing a refrigeration condensing unit, with a refrigerant coil
located in the furnace plenum.
Special Instructions:
1. Review manufacturer's instructions.
2. Schedule shutdown with building personnel.
3. Coordinate other related preventive maintenance items, such as, burners
(BURNERSG-A/BURNERO-A), fuel tank (TNKFUELOIL-4Y), humidifier (HUMDSYS-A),
etc.
3. Shut off fuel and power; tag and lock out all circuits.
Items to Check & Initial Completion:
1. ___ Remove furnace ends and access panels if applicable.
2. ___ Check the fire box liner or refractory for cracks and leaks.
3. ___ Check smoke stack for obstructions, leaks, etc.
4. ___ Clean bottom of smoke stack (breaching).
5. ___ Clean all fans and motors.
6. ___ Check operation of controls and safeties.
7. ___ Lubricate as required.
8. ___ Check and clean plenum (clean cooling coils and check for leaks, if
equipped.)
9. ___ Replace furnace and access panels ends if removed.
10.___ Check all motors, belts, pulleys, shafts, etc. for alignment.
11.___ Treat all rusted areas with rust inhibitor and touch up paint.
12.___ Remove lock outs and tags. Restore fuel and power supply.
Tools and Materials:
1. Standard Tool Kit
Plus Refrigeration - gauges
Leak detector-electronic or halogen
Pocket thermometer
Clamp on meter (volt - ohm - amp meter)
Flaring tool
Tubing cutters
Packing kit and packing
Crescent wrenches to 14"
Insulated pliers and screwdrivers
Wire strippers
Wire crimpers
Voltmeter - Ohmmeter - Milliammeter
Clamp on meter(volt - ohm - amp meter)
Soldering kit
1/8" 25' fish tape
Burnishing tool
2. Vacuum cleaner and attachments
3. Rust inhibitor, paint, brushes. Consult the Material Safety Data Sheet
(MSDS) for hazardous ingredients and proper personal protective equipment
(PPE).
Consult the MSDS to ensure that the paint lead level is 0.06% or less.
4. Cleaning and patching materials. Consult the MSDS for hazardous ingredients
and proper PPE.
5. Respirator, goggles and gloves.
6. Flue and stack cleaning brushes.
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