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Hersteller: Carrier Dateigröße: 45.15 kb Dateiname: 38ycb-2si.pdf Unterrichtssprache:

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 4 PC 101 Catalog No. 563-809 Printed in U.S.A. Form 38YCB-2SI Pg 1 6-96 Replaces: 38YCB-1SI Tab 5a 5a AIR DISCHARGE FIELD POWER SUPPLY CONN 7.8. DIA HOLE WITH 1 1.8. DIA KNOCKOUT AND 1 3.8. DIA KNOCKOUT FIELD CONTROL SUPPLY CONN 7.8. DIA HOLE SUCTION LINE CONN LIQUID LINE CONN A93578 UNIT SIZE LIQUID TUBE VAPOR TUBE Conn Dia Tube Dia Conn Dia Tube Dia 018, 024 3/8 3/8 5/8 5/8 030, 036 3/8 3/8 3/4 3/4 042, 048 3/8 3/8 7/8 7/8 060 3/8 3/8 7/8 1-1/8 Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50 ft, consult your local distributor. Fig. 2—Refrigerant Tube Dimensions/Connections PISTON BODY PISTON PISTON RETAINER LOCK NUT LIQUID SERVICE VALVE ADAPTER FERRULE A94030 Fig. 3—Liquid Service Valve Mechanical Fitting Assembly (38YCP Model) NOTE: A backup wrench on the hex part of the suction valve fitting is required while tightening. The tube end must stay bottomed in the service valve during final assembly to ensure proper seating, sealing, and rigidity. MECHANICAL FITTING REPAIR To replace damaged ferrule or tubing, proceed as follows. 1. Attach gages to service valves. 2. Close liquid service valve and operate unit in cooling mode to pump refrigerant charge into condenser coil. 3. When suction pressure reaches 5 psig, shut unit off. Do not operate unit in a vacuum. VALVE FITTING FERRULE LOCK NUT A92120 Fig. 4—Suction Service Valve with Mechanical Adapter (38YCP Model) FERRULE LOCK NUT TUBING A92121 Fig. 5—Lock Nut/Ferrule Positioning 4. Close suction service valve and recover refrigerant in tubing. 5. Back-off locknut and ferrule onto tube. 6. Remove damaged part of tubing using tubing cutter. Repeat installation procedure previously outlined using new ferrule. 7. Evacuate tubing set and indoor coil. Check for leaks. 8. Open service valves or recharge unit. Check refrigerant charge. A92122LOCK NUT MARK ON LOCK NUT AND TUBE TUBING Fig. 6—Proper Marking of Valve Assembly 2 NOTE: A thermostatic expansion valve (TXV) is required on all 38BYB units. Step 4 refers to the installation of the TXV. Step 4—Remove Indoor AccuRater® Piston and Install TXV For proper unit operation and reliability, units must be installed with a field-supplied hard shut-off TXV. Do not install with evaporator coils having capillary tube metering devices or piston. After removing existing AccuRater from indoor coil, install field-supplied bi-flow hard shut-off TXV kit. (See Fig. 7 and 8.) THERMOSTATIC EXPANSION VALVE COIL SENSING BULB EQUALIZER TUBE A88382 Fig. 7—Typical TXV Installation 2 O'CLOCK 10 O'CLOCK SENSING BULB STRAP SUCTION TUBE 8 O'CLOCK 4 O'CLOCK 7.8 IN. OD & SMALLER LARGER THAN 7.8 IN. OD A81032 Fig. 8—Positioning of Sensing Bulb For TXV kit part number and charging instruction, refer to TXV label in your unit. If the indoor unit (fan coil) comes factory equipped with a bi-flow hard shut-o...

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