Assessments - 2, GPA: 4.5
(
)
)
|
Facilidade de uso
Instructions are arranged in proper sequence for machine start-up. Job Data Required 1. List of applicable design temperatures and pressures 2. Machine assembly, wiring and piping prints 3 19CB Installation Instructions 4. 19CB Operating and Maintenance Instructions Equipment Required 1. Mechanic’s tools 2 Volt-ohmmeter and clamp-on ammeter 3. Manometer, absolute pressure type 4. Leak detector, halide or electronic 5. Refrigerant drum charging valve (Fig. 5) 6. 5/8-in. SAE x 3/4-in. MPT adapter 7. Five to ten ft of copper tubing or plastic hose to fit 5/8-in. SAE connections 8. Portable vacuum pump INITIAL PREPARATION CAUTION.' Do noi start compressor or oil pump, even for a rotation check, unless compressor is charged with oil and jnaclune charged with refrigerant. Do not apply voltage oi any kina white machine is under dehydration vacuum. © Carrier Corporation 1973 Form 19CB-2SS LEGEND 1 _ Cooler 12 — Cooier-Economize: EQualiiincj Damper 23 — Purge Condensing Chamber 2 _ Cooler Ret:tgeram Level Sight Glass Access Cover 24 — Pilter-Drier Shi;TOtf Valve 3 _ Low Refrigerant Tenwature Sulb •S3 — Refrigerant Connection, 1 1/2 Nf!T 25 — Cnilted Water Low-Temp Cutout 4 _ Thermometer Weil 14 — Cooler Charging Valve, 3/4 NPT 26 — Chi SiecS Water Temp Pi obe S ■■Machine Comroi Center 15 — ASMS Nameplate 27 — Purge fteirigerant Level Sight G¡ass ¡See f:ig. 6.) ■ . 16 — Machine informative Plate 28 — Purge Water Level Sight Glass 6 _ Knockouwforfie:ciWirt:>s, 17 — Safety Code Sticke: 29 — Purge Water Drain Valve 7 Concfensc-r 18 — Cooler Waterbcx Vent, 3/4 MPT 30 _ Poptyre Disc Assembly 8 _ Coder S'.joticn Pipe 19 — Condenser Waierbox Drain, 3/4 MPT 3t — Economize: Fioat Valve 9 — Condenser Discharge Pipe 20 — Condenser Waterbox Vent, 3/4 NPT 32 — Moisture Indicator TO Condenser Roat Vaive: 21 _ ticonomizsr 33 ~ rilter-Drier n — ..economizer Pipe 22 - Purge Operating Switch Fig. 1 — 19CB Machine Components (R-114 Unit Shown) 2 (го) (гГ) (гг) (S) (24} © ®ф ®@© Ulf I 2. 3. 4 5. pressure cylinder. Never apply full cylinder pressure to the pressurizing line. Follow steps 2 thru 5 in proper sequence. Open cooler charging valve fully. Open cylinder regulating valve slowly. Observe cooler or condenser pressure gage and close cylinder regulating valve when pressure reaches test pressure listed in Table 1. Do not exceed test pressure? Close cooler charging valve. Remove copper tube. R-ll machines may be pressurized with the purge pump. Ensure that electrical supply to purge pump is 120 volts. Then follow Operation 3 on the purge valve chart. R-l 14 machines may be pressurized with the pumpout unit This method is detailed in the section entitled Pumpout Procedures. Table 1 — Test Pressures REFRIGERANT R-ll R-l 14 TEST PRESSURE 8 - 10 psi g 30 - 35 psig LEGEND 1 Serial Number identification Piste 2 Oii Charging Valve ЗОН Heater Thermostat 4 Oil Heater : erminal Sox 5 Oil Reservoir Siijf.t Glass 6 Oil -Pressure Regulating Valve. : : 7 Oit Pump T erminal Box 8 Solenoid Valve 9 "G" Solenoid '\Aaivc-10 Oii Cooler Water-I n Conn..Solenoid Valve and Plus Coe* 12 Oil-Pressure Gage 13 Cil-Pressure Differential Switch 14 Bearing Temperature Gage 15 Oii Temperature Gage 16 Oil Cooler Water-Out Ccrt'-iecticii ' 17 Oil Pump Nameplaje 18 Compressor Nameplate IS Compressorfunction Sox 20 Economirer inlet 21 Compressor Motor Terminai Sox (Farside on most ••••:• mocleis) 22 Motor and 8»» Hi-Tetr.p-Cutout 'Junction Sox ; 23Main Bearir.g Inspection Covs' 24 Economizer Darooer Con-■-ecno- if. only! 25 GuicJe Va»e Indicator [g leotromo Control) : : 26 Hydrau lic Vane Motor 27 Discharge Stubout- : 28 Disci-.a:ye Pipe Fig. 2 — Compressor (Electronic Capacity Control) Machine Tightness — If machine leak testing and dehydration was not completed at installation, check machine tightness (including pumpout system) as described below. Dehydration must be repeated if machine has been idle for several weeks after initial dehydration. Check for Large Leaks — Using one of the methods described below, pressurize the machine to the level listed in Table 1. Do not exceed test pressure Listen for large leaks as the pressure builds up. If test pressure holds for one hour, proceed with Check for Small Leaks. All 19CB machines may be pressurized with cylinders of dry air or nitrogen thru the cooler charging valve. Dry air or nitrogen charging is preferable to purge or pumpout charging as it ensures that moisture will not be introduced into the machine. To pressurize with nitrogen (or dry air): 1. Connect a copper tube from charging valve to Check for Small Leaks 1. Pull a vacuum equal to 5 in. Hg (12 5 psia) by using purge pump Operation 2 (R-ll machines), pumpout unit (R-l 14 machines) or by applying a vacuum pump at the cooler charging valve. 2. Charge approximately 25 pounds of the proper refrigerant thru the cooler charging valve. 3. Pressurize machine to test pr...