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Resumen del manual
It can be installed at ground level or on a rooftop. The 479 is factory assembled, pre-wired and charged with the primary refrigerant. Installation consists of the following: I. Locating the Unit II. Installing Vent Caps III. Duct Connections IV. Gas Connections V. Electrical Connections VI. Chilled Water System VII. Start-Up and Adjustments VIII. Furnace Operation IX, Cooling Operation X. Maintenance Read the entire Installation Instructions before starting installation. I. LOCATE AND MOUNT THE UNIT The condenser air discharges upward; therefore, avoid locations where obstructions will deflect the hot condenser discharge air back into the condenser inlet air supply. In all cases, the condenser should be at least 2 feet from any wall or obstruction and outside of the plumb line from any overhang. Use caution to prevent damage when moving the unit. Use an adequate rope or cable sling and keep the unit in an upright position at all times during rigging and moving operations. CAUTION: Protect the top and sides so that the rigging sling will not damage the unit. A70224 Figure 2—Dimensional Drawing TABLE I HEATING RATINGS and CAPACITIES 180/240-479 Input 1st Stage Btuh 225,000 Output 1st Stage Btuh 168,000 Input 1st and 2nd Stage Btuh 450,000 Output 1st and 2nd Stage Btuh 337,000 Approved Temp Rise Model 180-479 °F 45 - 75 Model 240-479 °F 20 - 50 TABLE II COOLING RATINGS and CAPACITIES MODEL 180-479 240-479 Capacity (Total Cooling) Btuh 180,000 240,000 Air Flow CFM 6,000 8,000 External Static Pressure In. wg. 0.3 0.4 Entering Air Temperature °F 80/67 80/67 Entering Water Temperature °F 45 45 Gas Input (Total) Btuh 450,000 600,000 Electrical Input (Total) KW 5.0 6.0 Refrigerant Type R717 R717 Amount per Chiller Lbs. 18 26 Total Solution per Chiller Lbs. 55 79 -2- Mounting Bases The mounting base should comply with local codes and be made of noncombustible material. The recommended types of mounting bases for all installations are: a. Precase concrete lintels. Use three lintels run the depth of the unit; one under the right end, one under the left end, and one at the center of the unit. b. Steel beams. Use three I-beams run the depth of the unit; one under each end and one at the center. c. Concrete Slab. A minimum thickness of four inches is required. Rooftop Installation When installing the 479 on a roof or other combustible material, use noncombustible supports and allow a 6 inch clearance beneath the unit’s subbase for proper air circulation. Be sure the roof construction will support the weight of the equipment. Locate the unit above a load-bearing wall whenever possible. Condensate Drain The 479 is furnished with a 3/4 inch FPT drain connection. If the installation requires draining the condensate away from the roof of the building, connect tubing, pipe, hose or trough and pitch downward one inch for every ten feet of horizontal run. Ground Level Installation The 479 should be placed on a concrete slab at least 4 inches thick. Level the unit on the slab and be sure there is adequate drainage away from its base. Clearances The minimum clearances are 6 inches from the duct side and 24 inches from all other sides. II. INSTALLING VENT CAPS The vent cap assemblies are packaged and shipped in the heating section coil compartment. Install the vent cap assemblies as follows. See Figure 3. -3 1. Remove the cover on each of the vents on the roof of the unit. 2. Use the FAJ5606B screws supplied with the assemblies to fasten the base section of the vent cap assembly. 3. Remove the three self-tapping screws in the top cover, located approximately 7 inches behind each vent cap. Attach one of the air deflectors in this location for each vent cap, using the screws removed. III. DUCT CONNECTIONS Before attaching the ducting to the unit, remove the sheet metal panel that is used to protect the outlet and return openings. The ductwork may be screwed or bolted to the unit flange with suitable gaskets to insure a weathertight seal. Be sure the sheet metal overlaps the flange on the unit. CAUTION: Take care not to puncture the evaporator coil when drilling the duct flange. All duct work external of the structure must be properly insulated and water-proofed. All openings in the structure must be properly flashed and vibration isolated in accordance with local codes and good building practices. Supply and return duct work should be provided with an approved vibration eliminator. The vibration eliminator must be located within the structure. IV. GAS CONNECTIONS The gas supply pipe for the Model 479 should be a direct line from the gas meter or propane supply tank. The gas supply pipe should terminate at the unit with a tee. The size of the gas pipe used depends upon the length of run and allowable pressure loss established by the utility. Never use pipe smaller than the gas connection to the unit manifold. The following are pertinent recommendations: 1. Avoi...
Otros modelos de este manual:Los acondicionadores de aire - 479 (1.04 mb)