valutazioni - 6, GPA: 3.7
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3. Paint thinners and other painting compounds, paper bags or other paper products. A failure to follow this warning could result in corrosion of the heat exchanger, fire, personal injury, or death. The minimum maintenance that should be performed on this equipment is as follows: 1. Check and clean air filter each month or more frequently if required. Replace if torn. 2. Check blower motor and wheel for cleanliness and lubrication each heating and cooling season. Clean and lubricate as necessary. 3. Check electrical connections for tightness and controls for proper operation each heating season. Service as necessary. CAUTION:Aswithanymechanicalequipment,per- sonalinjurycanresultfromsharpmetaledges,etc., therefore,becarefulwhenremovingparts. A. Air Filter Arrangement The air filter arrangement may vary depending on the application. Refer to Table 1 or 2 for filter size information. TABLE 1—FILTER SIZE INFORMATION FOR DOWNFLOW FURNACE (IN.) FURNACE CASING WIDTH FILTER QUANTITY AND SIZE FILTER TYPE 14-3/16 (2) 16 X 20 X 1 Cleanable 17-1/2 (2) 16 X 20 X 1 Cleanable 21 (2) 16 X 20 X 1 Cleanable 24-1/2 (2) 16 X 20 X 1 Cleanable TABLE 2—FILTER SIZE INFORMATION FOR UPFLOW FURNACE (IN.) FURNACE FILTER QUANTITY AND SIZE FILTER TYPE Cleanable CASING WIDTH 14-3/16 Side Return (1) 16 X 25 X 1* Bottom Return (1) 14 X 25 X 1 17-1/2 (1) 16 X 25 X 1* (1) 16 X 25 X 1 Cleanable 21 (1) 16 X 25 X 1 (1) 20 X 25 X 1* Cleanable 24-1/2 (2) 16 X 25 X 1* (1) 24 X 25 X 1 Cleanable * Factory provided with the furnace. Filters may be field modified by cutting as required. Each furnace requires 2 filters which are installed in the return-air duct. (See Fig. 3.) Fig.3—FilterPositionsA88486RETURN-AIR PLENUM ........................................................................AIRFLOW ACCESS DOOR INSTALLATION POSITION OF FILTERS To remove filters for cleaning or replacement, proceed as follows: a. Disconnect electrical power before removing access door. b. Remove blower access door after removing 2 screws. c. Reach up behind top plate, tilt filters toward center of return-air plenum, remove filters, and clean as needed. Replace if torn. d. Furnaces are equipped with permanent, washable filters. Clean filters with tap water. Spray water through filter in opposite direction of airflow. e. Rinse and let dry. Oiling or coating of filters is not recommended or required. f. Reinstall filters. g. Replace access door and secure with 2 screws. h. Restore electrical power to furnace. 2. Upflow Each furnace requires 1 or 2 filters which are installed in the blower compartment. (See Fig. 4.) To remove filters for cleaning or replacement, proceed as follows: a. Disconnect electrical power before removing access doors. —2— RELIEF BOX MOUNTING SCREWS CONTROL BOX RELIEF BOX MOUNTING SCREWS CONTROL BOX DRAFT SAFEGUARD SWITCH FLUE COLLECTOR BOX GAS VALVE PILOT SPEED SELECTOR FILTER RETAINER WASHABLE FILTER SPEED SELECTOR MOUNTING SCREWS RELIEF BOX AUXILIARY LIMIT SWITCH (NOT VISIBLE) VENT PIPE ENCLOSURE CONTROL BOX DRAFT SAFEGUARD SWITCH FLUE COLLECTOR BOX A92178 Fig. 4—Model 394HAD Upflow b. Remove blower and control access doors. c. Release filter retainer from clip at front of furnace casing. (See Fig. 4.) For side return, clips may be used on either or both sides of the furnace. d. Slide filter out. e. Furnaces are equipped with permanent, washable filters. Clean filters with tap water. Spray water through filter in opposite direction of airflow. f. Rinse and let dry. Oiling or coating of filter is not recommended or required. g. Reinstall filter. h. Replace access doors. i. Restore electrical power to furnace. B. Blower Motor and Wheel For long life, economy, and high efficiency, clean accumulated dirt and grease from the blower wheel and motor annually. The following steps 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 those motors with oil ports, lubricate motor every 5 years if motor is used on intermittent operation (thermostat FAN switch in AUTO position), or every 2 years if motor is in continuous operation (thermostat FAN switch in ON position). Remember to disconnect the electrical supply before removing access doors. Clean and lubricate as follows: 1. Remove 2 screws from blower access door (downflow furnace only). Remove blower access door. 2. Remove vent pipe enclosure (downflow furnace only) and disconnect short piece of vent pipe from relief box. A92179 Fig. 5—Model 396HAD Downflow 3. Disconnect wires from auxiliary limit on blower housing (downflow furnace only). 4. Remove control box. 5. Remove electrical leads from numbered side of blower speed selector. (See Fig. 4 and 5.) Note location of wires for reassembly. 6. Remove screws holding blower assembly to blower deck and slide blower assembly out of furnace. 7. Squeeze side tabs of blower speed selector and pull it o...