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HEATING & COOLING
58EFA Gas-Fired Horizontal Induced-Combustion Furnaces
Service and Maintenance instructions
For Sizes 050-125, Series 110
NOTE: Read the entire instruction manual before starting the installation.
SAFETY CONSIDERATIONS
Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified person nel should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. When working on heating equipment, observe precautions in the literature, tags, and labels attached to or shipped with the unit and other safety precautions that may apply.
Follow all safety codes, including NFPA 54/ANSI Z223.1-1988, National Fuel Gas Code. Wear safety glasses and work gloves. Have fire extinguisher available during start-up and adjustment procedures and service call.
Recognize safety information. This is the safety-alert sy When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury.
Understand the signal word—DANGER, WARNING, or CAU TION. These words are used with the safety-alert symbol. DANGfeR'idehtifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards that could result in personal injury or death. CAUTION is used to identify unsafe practices, which would result in minor personal injury or product and property damage.
A WARNING
Never store anything on, near, or in contact with, the furnace, such as:
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum cleaners, or other cleaning tools.
2.Soap powders, bleaches, waxes or other cleaning com pounds, plastic or plastic containers, gasoline, kerosene, cigarette lighter fluid, dry cleaning fluids, or other volatile fluids.
3.Paint thinners and other painting compounds, paper bags or
other paper products.
Failure to follow this warning can cause corrosion of the heat exchanger, fire, personal injury, or death.
A WARNING
The ability to properly perform maintenance on this equip ment requires certain expertise, mechanical skills, tools, and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment other than those procedures recommended in the User’s Manual. FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE TO THIS EQUIPMENT, SERIOUS PERSONAL INJURY, OR DEATH.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equip ment failure, it is essential that maintenance be performed annually on this equipment. Consult your local dealer for maintenance and the availability of a maintenance contract.
A91314
Fig. 1—Model 58EFA Horizontal Furnace
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.
Book 1 4 |
PC 101 |
Catalog No. 565-839 |
Printed in U.S.A. |
Form 58EFA-2SM |
Pg1 |
8-92 |
Replaces: 58EFA-1SM |
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Tab 6a 8a |
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A WARNING
Turn OFF the gas and electrical supplies to the unit before performing any maintenance or service. Follow the operating instructions on the label attached to the furnace. Failure to follow this warning could result in personal injury.
The minimum maintenance that should be performed on this equipment is as follows:
1.Check and clean or replace air filter each month, or as required. (See Step 1.)
2.Check blower motor and wheel for cleanliness and lubrication each heating and cooling season. Clean and lubricate as necessary. (See Step 2.)
3.Check electrical connections for tightness and controls for proper operation each heating season. Service as necessary.
4.Check for blockages of vent pipe.
A CAUTION
As with any mechanical equipment, personal injury could result from sharp metal edges, etc. Be careful when removing parts, panels, or components.
Step 1—Air Filter Cleaning and Replacement
The air filter arrangement may vary depending on the application. Each furnace may be supplied with a permanent, washable filter and wire filter retainer option. If so, the filter is normally located in the return-air plenum opening before the blower. (See Fig. 2.)
A91175
Fig. 2—Blower Compartment Table 1—Horizontal Furnace Filters
FURNACE SIZE |
FILTER SIZE |
FILTER TYPE |
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(INPUT BTUH) |
(IN.) |
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50,000 |
(1) 13x23x1 |
Cleanable |
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75,000 |
(1) 13x23x1 |
Cleanable |
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100,000 |
(1) 16x23x1 |
Cleanable |
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125,000 |
(1) 20x23x1 |
Cleanable |
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A CAUTION
Never operate unit without a filter or with filter access door removed. Failure to follow this warning could result in a fire or personal injury.
To clean or replace the filters, proceed as follows;
1.Turn OFF electrical supply to unit.
2.Remove blower access door located at inlet (return air) end of furnace; 4 screws must be removed.
3.Bend wire filter retainer until it clears furnace flange and swing it toward the blower.
4.Remove filter from furnace. If filter is tom, replace it.
5.Furnaces may be equipped with permanent, washable filters. Clean these filters by spraying cold tap water through filter in opposite direction of airflow. A mild liquid detergent may be used if necessary.
6.Rinse filters and let dry. Oiling or coating of filters is not recommended or required for factory-supplied filters.
7.Reinstall filters with cross-mesh binding facing blower.
8.Replace blower access door and reinstall 4 screws.
9.Turn ON electrical supply to furnace.
Step 2—Blower Motor and Wheel Maintenance
For long life, economy, and high efficiency; clean accumulated dirt and grease from blower wheel and motor annually.
The following items should be performed by a qualified service technician:
Some motors have prelubricated, sealed bearings and require no lubrication. These motors can be identified by the absence of oil ports on each end of the motor. For motors with oil ports, lubricate as follows:
Lubricate motor every 5 years if motor is used for intermittent operation (thermostat FAN switch in AUTO position), or every 2 years if motor is in continuous operation (thermostat FAN switch in ON position).
Clean and lubricate as follows:
1.Turn OFF electrical supply to unit.
2.Remove blower access door; 4 screws must be removed.
3.Remove blower assembly as follows:
a.Remove 4 screws securing front blower support bracket and remove bracket. (See Fig. 2.)
b.Using a 3/8-in. ratchet with a 3-in. extension, reach through 4-in. diameter holes in rear blower support bracket and remove 2 screws securing bracket to blower shelf. (See Fig.
2.)
c.Disconnect motor leads from motor speed selector. (See Fig. 2.)
d.Remove blower assembly from unit.
4.Mark blower wheel location on shaft before disassembly to insure proper reassembly.
5.Loosen setscrew holding blower wheel on motor shaft.
6.Disconnect ground wire from blower housing.
7.Remove bolts holding motor mount to blower housing and slide motor and mount out of housing.
8.Lubricate motor (when oil ports are provided).
a.Remove dust caps or plugs from oil ports located at each end of motor. If motor does not have these caps or plugs, bearings are sealed and need no further lubrication.
b.Use a good grade of SAE 20 nondetergent motor oil and add 1 teaspoon (5 cc, 3/16 oz, or 16 to 25 drops) in each oil port. The use of other types or grades of oil will damage the motor. Excessive oiling can cause premature bearing fail ures.
c.Allow time for total quantity of oU to be absorbed by each bearing.
WA
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