Assessments - 4, GPA: 5
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INSTALLATION RECOMMENDATIONS 1. Locate unit away from windows. 2. Ensure that vapor and liquid tube diameters are appropriate to capacity of unit. (See Table 1.) 3. Run refrigerant tubes as directly as possible by avoiding NOTE: Avoid contact between tubing and structure. LIQUID TUBE VAPOR TUBE VAPOR TUBE LIQUID TUBE INSULATION OUTDOOR WALL INDOOR WALL INSULATION CAULK THROUGH THE WALL HANGER STRAP (AROUND VAPOR TUBE ONLY) JOIST 1. MIN (25 mm) SUSPENSION unnecessary turns and bends. 4. Leave some slack between structure and unit to absorb vibration. 5. When passing refrigerant tubes through the wall, seal opening with RTV or other pliable silicon-based caulk. (See Fig. 4.) 6. Avoid direct tubing contact with water pipes, ductwork, floor joists, wall studs, floors, and walls. 7. Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with tubing. (See Fig. 4.) 8. Ensure that tubing insulation is pliable and completely surrounds vapor tube. 9. When necessary, use hangar straps which are 1 in. (25mm) wide and conform to shape of tubing insulation. (See Fig. 4.) 10. Isolate hangar straps from insulation by using metal sleeves bent to conform to shape of insulation. If refrigerant tubes or indoor coil is exposed to atmosphere, it must be evacuated to 500 microns to eliminate contamination and moisture in the system. OUTDOOR UNIT CONNECTED TO FACTORY-APPROVED INDOOR UNIT — Outdoor unit contains correct system refrigerant charge for operation with indoor unit of same size when connected by 15 ft (4.55m) of field-supplied or factory-accessory tubing. Check refrigerant charge for maximum efficiency. A94330 Fig. 4—Piping Installation PISTON BODY PISTON PISTON RETAINER SWEAT/FLARE ADAPTER A94029 Fig. 5—Service Valve with Sweat Adapter Tube 3 REFRIGERANT TUBING — Connect tubing to fittings on out door unit vapor and liquid service valves. (See Fig. 2 and 5.) SWEAT CONNECTION — Use refrigerant grade tubing. Service valves are closed from factory and ready for brazing. After wrapping service valve with a wet cloth, tubing set can be brazed to service valve using either silver bearing or non-silver bearing brazing material. Consult local code requirements. Refrigerant tubing and indoor coil are now ready for leak testing. This check should include all field and factory joints. Step 6—Make Electrical Connections To avoid personal injury or death, do not supply power to unit with compressor terminal box cover removed. Be sure field wiring complies with local and national fire, safety, and electrical codes, and voltage to system is within limits shown on unit rating plate. Contact local power company for correction of improper voltage. See unit rating plate for recommended circuit protection device. NOTE: Operation of unit on improper line voltage constitutes abuse and could affect unit reliability. See unit rating plate. Do not install unit in system where voltage may fluctuate above or below permissible limits. NOTE: Use copper wire only between disconnect switch and unit. NOTE: Install branch circuit disconnect per local codes to handle unit starting current. Locate disconnect within sight from and readily accessible from unit per local codes. ROUTE GROUND AND POWER WIRES — Remove access panel and control box cover to gain access to unit wiring. Extend wires from disconnect through power wiring hole provided and into unit control box. (See Fig. 2.) Size wires per local codes but not smaller than minimum wire size shown on unit rating plate. CONNECT GROUND AND POWER WIRES — Connect ground wire to ground connection in control box for safety. Connect power wiring to contactor as shown in Fig. 6. DISCONNECT PER IEC AND/OR LOCAL CODES FIELD POWER WIRING L1 L2/N L3 PE CONTACTOR L2/N L3 L1 N FOR 1-PHASE ONLY 3-PHASE ONLY PE GROUND LUG A96650 Fig. 6—Line Power Connections The unit cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. Failure to follow this warning can result in an electric shock, fire, or death. NOTE: Use No. 18 AWG (American Wire Gage) color-coded, insulated (35°C minimum) wires. If thermostat is located more than 100 ft (30.5m) from unit (as measured along the control voltage wires), use No. 16 AWG color-coded wires to avoid excessive voltage drop. CONNECT CONTROL WIRING — Route 24-v control wires through control wiring grommet and connect leads to control wiring terminal board. (See Fig. 7.) Use furnace transformer, fan coil transformer, or accessory trans former for control power, 24-v/40-va minimum. NOTE: Use of available 24-v accessories may exceed the minimum 40-va power requirement. Determine total transformer loading and increase the transformer capacity or split the load with an accessory transformer as required. NOTE: The defrost timer is factory set for 90-minute ...