Assessments - 2, GPA: 4.5
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Facilidade de uso
1 - 07KA Water-Cooled Condensing Unit *Factory charge. Refer to Refrigerant Charging, page 3, for charging details. tUse Carrier PP-33-2, Texaco Capella Bl or Suniso 3G Dual Inhibited oil. NOTE: High and low pressurestats cut-in and cutout points are not adjustable. Table 2 - Electrical Data (60-Cycle) COND UNIT 07KA VOLTS PHASE BRANCH CIRCUIT NDSV LRA FLA MAX KW WSA Wire Size (AWG No) Max Ft Wire Wire Size (AWG No) Max Ft Wire Fuse Amp* 002310 230 1 230 49 0 12 0 2 75 15 2 12 46 10 74 20 004310 230 1 230 78 0 17 1 5 0 21 6 10 52 8 82 30 004510 230 3 220- 240 53 5 10 3 5 0 13 1 12 65 10 103 20 NDSV - Nominal Distribution System Voltage (Application Range) Motors and controls will operate satisfactorily 10% above and 10% below Nominal Distribution System Voltage. LRA - Locked Rotor Amps FLA - Full Load Amps WSA - Wire Sizing Amps *Maximum dual element fuse size NOTES: 1 Control circuit voltage is 24 volts on all units 2 Branch circuit wire sizes and corresponding maximum wire lengths tabulated will result in a 1% voltage drop at nameplate full load amperage START-UP INSTRUCTIONS Crankcase heater on 07KA004 should be energized a minimum of 4 hours before starting unit. 07KA single-phase units are of split capacitor (PSC) type and require an equalized system pressure to start. Start Procedure 1. Back-seat (open) liquid and suction line service valves. (When accessory water regulating valve is used, "crack" liquid line service valve one-half turn from backseat position.) 2. Open water supply valve and allow water to reach condenser. (Water regulating valve restricts water until unit is operating.) Open condenser water discharge valve (when used). 3. Close disconnects energizing entire system. 4. Set room thermostat to desired temperature. 5. Set room thermostat to "Cool" and fan switch as desired. Motors and controls will operate satisfactorily 10% above and 10% below nominal distribution system voltage (see Table 2). © Carrier Corporation 1967 Printed in U.S.A. 5-67 07KA-1SS COMPRESSOR When supply voltage is within 10% limit and compressor does not start, give compressor a temporary capacitance boost. Use a start booster assembly. Run compressor for 10 minutes, then shut off and allow system pressure to equalize. Try restarting without boost capacitor. If after two at-temps the compressor does not start, add an accessory start capacitor relay package. The accessory start relay used with the 06A compressor has a current-limiting device to protect the compressor in case of relay malfunction. An open current-limiting device indicates that the relay must be changed. Compressor Protection - 07KA units have a high pressurestat located on liquid service valve and a low pressurestat located on suction service valve. (See Table 1 for high and low pressurestat settings.) Single-phase compressor motors are protected by an internal current temperature-sensitive overload. Three-phase compressors are protected by internal thermostat and external current overloads. Internal temperature-sensitive overloads reset automatically when internal motor temperatures drop to a safe level. (Overloads may require up to 30 minutes to reset.) When an internal overload is suspected of being open, check by using an ohmmeter or continuity tester. Refer to the Carrier Standard Service Techniques Manual, Chapter 2 for complete instructions. Compressor Removal 1. Shut off power to unit. Vent refrigerant to atmosphere or use refrigerant removal methods described in Carrier Standard Service Techniques Manual, Chapter 1. 2. Remove both unit top cover and wrap-around enclosure. 3. Remove compressor power leads from unit control box and pressure relief plug from suction line. Unsweat suction and hot gas lines from compressor. 4. Remove compressor hold-down bolts. Lift compressor out thru top of unit. REFRIGERANT CHARGING 07ICA units contain correct operating charge (Table 1) for complete system when combined with Carrier approved capillary-controlled evaporator sections and with a Carrier accessory precharged tubing package in 10- or 18-ft lengths. Additional charge may be required on other systems. Add a crankcase heater to 07KA002 when factory charge is exceeded. (Crankcase heater available from Carrier Service Parts Center, part no. HT32AZ242.) Do not use condensing unit charge for purging evaporator or tubing systems. Refer to Carrier Standard Service Techniques Manual, Chapter 1 for system evacuation, dehydration instructions and details of charging methods listed below. Service valve access cover is provided to accommodate charging lines. Replace cover when finished. Weight Method - Systems with capillary tube control are recharged by weight only. Refer to Table 1 for correct system charge. Blow any refrigerant remaining in system before recharging. When interconnecting tubing is shorter than 10 ft or longer than 18 ft, add (subtract) charge as follows: 3/4 oz per 10 ft of 5/16-in. OD l...