Assessments - 2, GPA: 3.5 ( )

Fabricante : Thermo Products Arquivo Tamanho: 1.31 mb Arquivo Nome : Língua de Ensino:

“Y” DIMENSION IS MEASURED FROM THE BLOWER PAN ON “H” MODELS AND FROM THE BASE ON “L” AND “C” MODELS. Fig 1: Recommended location for drilling hole to connect vent pipe to the furnace through the left hand side casing. A. DRAFT REGULATORS: A draft regulator is supplied with the furnace and should be installed according to the regulator manufacturers recommendations. With the burner operating, use a draft gauge to adjust the regulator to the proper setting. (refer to the instructions enclosed with draft regulator to adjust to the proper setting). When the burner air supply and draft are properly adjusted, the overfire draft should be a negative (-).01" to (-).02" WC, as measured at the 5/16" overfire air tap (See Fig. T). This tap is provided in the upper burner mounting plate. To measure the flue draft, punch a small hole in the vent connector pipe as close to the furnace as possible and always before the draft regulator. B. DUCT WORK/AIR CONDITIONING: If the furnace is used in connection with summer air conditioning (cooling), the furnace should be installed parallel with or on the upstream side of the evaporator coil to avoid condensation in the furnace heat exchanger. If the cooling unit is installed with a parallel flow arrangement, dampers or other means used to control flow of air should be provided to prevent chilled air from entering the furnace. If such a damper is manually operated, it must be equipped with a means to prevent operation of either unit, unless the damper is in the full heat or cool position. 3 All installations and services must be performed by qualified service personnel. 4 The duct system should again follow the current design standard of Air Conditioning Contractors of America (ACCA) or ASHRAE Fundamentals volume. The most common location for the A-shaped coil (A style) is shown in Fig. 2. Fig 2: Acceptable locations for the air conditioner evaporator coil. NOTICE: The minimum coil pan clearance for a sectional or drum type heat exchanger is three inches unless specified otherwise by the individual coil manufacturer. A slab coil (H-style) is available for the horizontal air flow application on the OT5-11-16 furnaces refer to Fig. 3. Fig. 3: An acceptable location for the air conditioner evaporator coil when used with a horizontal furnace. To obtain proper airflow with an air conditioning coil installed on a belt drive unit, the motor and/or blower pulley may need to be changed. On a direct drive unit, the blower motor speed may need to be changed depending upon the size of the air conditioning system installed and the airflow resistance of the duct system. NOTE: The horizontal units have direct drive blowers and no pulley or motor change is required. C. FILTERS MOUNTED EXTERNAL TO THE FURNACE: The filters of the OC2-5 mount in the return air plenum on the top opening on the top of the furnace. (For installation detail, see figure 4). Fig. 4: Air filter mounting location for the OC2-5 furnace. All installations and services must be performed by qualified service personnel. On highboy furnaces, it is necessary to cut the return air opening in the side or rear casing, depending upon the needs of the specific installation. The filter rack provided with the furnace, refer to Fig. 5, will serve as a template to scribe a mark for the return air opening on the casing. Place the filter rack on the casing one inch up from the bottom of the furnace and centered from side to side. Place the securing flange against the casing when locating the return air opening. Fig. 5: A typical filter rack and dimensions for the highboy furnaces. PLEASE NOTE: While scribing the return air opening, the filter rack can be held in position by tape or similar temporary means. Position the open end of the filter rack so as to provide access for filter replacement. Once the filter rack is positioned correctly, scribe a line along the inside of the securing flange on three of the sides. To scribe a line on the fourth side (the open end), use the open end support as a guide. Remove the filter rack and cut the return air opening in the casing. Now the filter rack can be anchored to the furnace with screws or pop-rivets through the securing flange of the filter rack. . WARNING: When cutting openings in the casing DO NOT CUT ANY SUPPORTING CLIPS OR ANGLES. Cut as close to the scribed line as possible, but do not cut the base clip or blower pan support angle. (See Fig. 6). Fig. 6: Cutaway view of fan section of a typical highboy furnace. Connect the return air plenum to the filter rack and slide the filter into place. Dimensions for adapting the return air plenum to the filter rack are provided on the bottom of the previous page. 5 All installations and services must be performed by qualified service personnel. D. FAN AND LIM...

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