Carrier 38CKB Air Conditioner User Manual
Contents
1. 460 4 14 3 8 365 1 3 4 19 1 048 060 30 762 0 6 1 2 A 596 9 20 508 0 7 8 22 2 Fig 2 Unit Reference Drawing 3 Run refrigerant tubes as directly as possible by avoiding A CAUTION unnecessary turns and bends 4 Leave some slack between the structure and the unit to absorb Towpieyent compressor damage DO NOT bury morethan 36 in 914mm of refrigerant tubing If ANY tubing is buried provide 6 in 152mm vertical rise at service valve vibration 5 When passing refrigerant tubes through the wall seal the opening with RTV or other pliable silicon based caulk See OUTDOOR UNITS CONNECTED TO FACTORY APPROVED Fig 3 INDOOR UNITS Outdoor unit contains correct system refrig 6 Avoid direct lineset contact with water pipes ductwork floor erant charge for operation with indoor unit of the same size when joists wall studs floors and walls connected by 15 ft 4 55m of field supplied or factory accessory 7 Do not suspend refrigerant tubing from joists and studs with a tubing Check refrigerant charge for maximum efficiency rigid wire or strap which comes in direct contact with the REFRIGERANT TUBING Connect tubing to fittings on out tubing See Fig 3 door unit vapor and liquid service valves See Fig 2 8 Ensure that tubing insulation is pliable and completely sur rounds the vapor tube A WARNING 9 When necessary use hangar straps which are in 25mm Relieve pressure and recover all refrigerant2. Ca Carrier ee HEATING amp COOLING 38CKB 50 Hz Air Conditioning Unit Installation and Start Up Instructions NOTE Read the entire instruction manual before starting the installation SAFETY CONSIDERATIONS Improper installation adjustment alteration service maintenance or use can cause explosion fire electrical shock or other conditions which may cause death personal injury or property damage Consult a qualified installer service agency or your distributor or branch for information or assistance The qualified installer or agency must use factory authorized kits or accessories when modifying this product Refer to the individual instructions packaged with the kits or accessories when installing Follow all safety codes Wear safety glasses protective clothing and work gloves Use quenching cloth for brazing operations Have fire extinguisher available Read these instructions thor oughly and follow all warnings or cautions included in literature and attached to the unit Consult local building codes and national electric codes for special requirements Recognize safety information This is the safety alert symbol N When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand the signal word DANGER WARNING or CAU TION These words are used with the safety alert symbol DAN GER identifies the most serious hazards which will resu
3. COMMENDATIONS 1 Locate the unit away from windows 2 Ensure that vapor and liquid tube diameters are appropriate to the capacity of the unit See Table 1 Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 PC 101 Catalog No 013 862 Tab 3a 2a Printed in U S A Form 38CKB C1SI Pg 1 12 94 Replaces New AIR IN NOTES DIeCHARGE 1 Allow 30 in 762 clearance to service sides of unit 48 in 1219 2 above unit 6 in 152 4 on one side 12 in 304 8 on remaining side and 24 in 609 6 between units for proper airflow 2 Minimum outdoor operating ambient in cooling mode is 55 F 12 8 C max 115 F 46 1 C AIR 3 Dimensions in parenthesis are in millimeters 4 Series designation is the 13th position of the unit model number AIR IN AIR DISCHARGE AIR IN AIR Pree 4 AIR DISCHARGE RATING LABEL 5 FIELD POWER P P SUPPLY CONN i IN DIA 22 22 HOLE WITH 114 IN DIA 28 57 KNOCKOUT a ars AND 134 IN DIA 34 92 KNOCKOUT P Cc O 4 KO FIELD CONTROL SUPPLY CONN 7 IN DIA 22 22 HOLE 3 IN DIA 9 53 LIQUID LINE CONN F DIA SUCTION LINE CONN S A91173 UNIT SIZE abe F In mm In mm In mm In mm 018 18 457 2 3 381 0 10 3 16 258 8 5 8 15 9 024 22 1 2 571 5 3 11 16 460 4 14 3 8 365 1 5 8 15 9 036 22 1 2 571 5 3 11 16
4. OR 4s LIQUID LINE SOLENOID TRANS TRANSFORMER IFR INDOOR FAN RELAY A94331 Fig 5 24 v Control Circuit Connections Copyright 1994 CARRIER Corp 7310 W Morris St e Indianapolis IN 46231 38ckbc1s Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations reek x k PC 101 Catalog No 013 862 Printed in U S A Form 38CKB C1SI Pg 6 12 94 Replaces New al aj 2a
5. RING Route 24 v control wires through control wiring grommet and connect to brown and blue pigtails supplied in unit splice box See Fig 5 Use furnace transformer fan coil transformer or accessory trans former for control power 24 v 40va minimum NOTE Use of available 24 v accessories may exceed the mini mum 40 va power requirement Determine total transformer load ing and increase the transformer capacity or split the load with an accessory transformer as required Step 6 Compressor Crankcase Heat When equipped with a crankcase heater energize heater a mini mum of 24 hrs before starting unit To energize heater only set thermostat to OFF position and close electrical disconnect to outdoor unit A crankcase heater is required if the refrigerant tubing is longer than 50 ft 15 24m Step 7 Install Electrical Accessories If Any Refer to the individual instructions packaged with the kit or accessory when installing Step 8 Start Up and Check Charge A CAUTION To prevent compressor damage or personal injury observe the following Do not overcharge system with refrigerant e Do not operate unit in a vacuum or at negative pressure e Do not disable low pressure switch In scroll compressor applications e Dome temperatures may be hot e In 3 phase application incorrect phasing will cause reverse rotation resulting in elevated noise levels equalized pres sures and reduced current draw Correct by
6. before system wide and conform to the shape of the tubing insulation See repair or final unit disposal to avoid personal injury or death Fig 3 Use all service ports and open all flow control devices 10 Isolate the hangar straps from the insulation by using metal including solenoid valves sleeves bent to conform to the shape of the insulation If refrigerant tubes or indoor coil is exposed to atmospheric conditions for longer than 5 minutes it must be evacuated to 500 microns to eliminate contamination and moisture in the system Table 1 Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters LIQUID VAPOR UNIT SIZE Connection Dia Tube Dia Connection Dia Tube Dia In mm In mm In mm In mm 018 024 3 8 9 53 3 8 9 53 5 8 15 88 5 8 15 88 036 3 8 9 53 3 8 9 53 3 4 19 05 3 4 19 05 048 3 8 9 53 3 8 9 53 7 8 22 23 7 8 22 23 060 3 8 9 53 3 8 9 53 7 8 22 23 1 1 8 28 58 1 Tube diameters are for lengths up to 50 ft 15 24m For tube sets over 50 ft 15 24m consult Long Line Application Guideline 2 Do not apply capillary tube indoor coils to these units A CAUTION To prevent damage to unit or service valves observe the following e Use a brazing shield e Wrap service valves with wet cloth or use a heat sink material SWEAT CONNECTION Use refrigerant grade tubing Service valves are closed from factory and ready for brazing After wrapping the service valve
7. g 1 Model 38CKB For proper airflow a 6 in 152mm clearance on 1 side of unit and 12 in 305mm on all remaining sides must be maintained Maintain a distance of 24 in 610mm between air conditioners Position so water snow or ice from roof or eaves cannot fall directly on unit On rooftop applications locate unit 6 in 152mm above roof surface Where possible place unit above a load bearing wall Arrange supporting members to adequately support unit and minimize transmission of vibration to building Consult local codes governing rooftop applications Step 3 Replace Indoor AccuRater Piston if Required Check indoor coil piston to see if it matches the required piston shown on unit rating label If it does not match replace indoor coil piston with piston shipped with this unit The piston shipped with outdoor unit is correct for any approved indoor coil combination 4 CAUTION Remove indoor coil piston if unit is to be installed on system with a TXV metering device Step 4 Make Piping Connections Outdoor units may be connected to indoor sections using accessory tubing package or field supplied refrigerant grade tubing of correct size and condition For tubing requirements beyond 50 ft 15 24m consult Long Line Application Guideline which is available at your local distributor NOTE In some cases noise in the living area has been traced to gas pulsations from improper installation of equipment INSTALLATION RE
8. le from unit per local codes A WARNING To avoid personal injury or death do not supply power to unit with compressor terminal box cover removed A WARNING 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 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 label 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 4 DISCONNECT PER N E C AND OR LOCAL CODES CONTACTOR O a oe FIELD POWER a OO _3 PHASE ONLY BLUE 7 gee eee E WIRING GROUND LUG a A94025 Fig 4 Line Power Connections NOTE Use No 18 AWG American Wire Gage color coded insulated 35 C minimum wire 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 WI
9. lt in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage A WARNING Before installing modifying or servicing system main elec trical disconnect switch must be in the OFF position There may be more than 1 disconnect switch Lock out and tag switch with a suitable warning label Electrical shock can cause personal injury or death INSTALLATION Step 1 Check Equipment and Jobsite UNPACK UNIT Move to final location Remove carton taking care not to damage unit INSPECT EQUIPMENT File claim with shipping company prior to installation if shipment is damaged or incomplete Locate unit rating label on unit service panel See Fig 2 It contains information needed to properly install unit Check rating label to be sure unit matches job specifications Step 2 Install on a Solid Level Mounting Pad If conditions or local codes require the unit be attached to pad tiedown bolts should be used and fastened through knockouts provided in unit base pan Refer to unit mounting pattern in Fig 2 to determine base pan size and knockout hole location When installing allow sufficient space for airflow clearance wiring refrigerant piping and service Allow 30 in 762mm clearance to service end of unit and 48 in 1219mm above unit A94356 Fi
10. reversing power connection L1 and L2 on contactor A CAUTION To prevent personal injury wear safety glasses protective clothing and gloves when handling refrigerant and observe the following e Back seating service valves are not equipped with Schrader valves Fully back seat counter clockwise valve stem before removing gage port cap e Front seating service valves are equipped with Schrader valves A CAUTION Do not vent refrigerant to atmosphere Recover during system repair or final unit disposal 1 Fully back seat open liquid and vapor tube service valves 2 Unit is shipped with valve stem s front seated and caps installed Replace stem caps after system is opened to refrig erant flow back seated Replace caps finger tight and tighten additional 1 6 turn with wrench 3 Close electrical disconnects to energize system 4 Set room thermostat at desired temperature Be sure set point is below indoor ambient temperature 5 Set room thermostat at COOL and fan switch at FAN or AUTO as desired Operate unit for 15 minutes Check system refrigerant charge 6 Factory charge is shown on unit rating label Adjust charge by following procedure shown on charging tables located on unit Step 9 Leave User s Manual with Owner For continued high performance and to minimize possible equip ment failure periodic maintenance MUST be performed on this equipment Leave User s Manual with owner Explain sy
11. stem operation and periodic maintenance requirements outlined in manual Frequency of maintenance may vary depending on geographic areas such as coastal applications which require more frequent maintenance THERMOSTAT THERMOSTAT FURNACE Apes s25 i R H H R TLA MOTOR m i POWER c H ames M SUPPLY Gps Cs 46 c m TRANS Y H c 4 IU AERES Breva rere EE Aa Wire ee COOLING ONLY ONE STAGE COOLING GAS HEATING THERMOSTAT FAN COIL THERMOSTAT INDOOR UNIT R H 4 R R H 4 R c H a NAE F m ea o Vaa E 4yY bs Lape on Y 4 Y Len L w 4 we Ww 4 W ONE STAGE COOLING ELECTRIC HEAT ONE STAGE COOLING HEATING ACCESSORY LIQUID LINE SOLENOID NOTES 1 Wiring must conform to local codes 2 LLS required on some units See specific unit instructions 3 Transformer required is 24 v 40 va minimum A 60 va or external power source may be necessary when installing accessories 4 When installing electronic thermostat connect transformer common to thermostat C LEGEND c COMPRESSOR CONTACTOR m INDOOR FAN MOT
12. with a wet cloth the tubing set can be brazed to the service valve using either silver bearing or non silver bearing brazing material Consult local code requirements Refrig erant tubing and indoor coil are now ready for leak testing This check should include all field and factory joints NOTE Avoid contact between tubing and structure OUTDOOR WALL INDOOR WALL CAULK A y F LIQUID TUBE amp 3 AN E VAPOR TUBE INSULATION THROUGH THE WALL g sT HANGER STRAF AROUND VAPOR TUBE ONLY INSULATION VAPOR TUBE fe fe fe a TE 3 1 MIN ee ee X 25 mm LIQUID TUBE SUSPENSION A94330 Fig 3 Piping Installation Step 5 Make Electrical Connections 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 label Contact local power company for correction of improper voltage See unit rating label for recommended circuit protection device NOTE Operation of unit on improper line voltage constitutes abuse and could affect unit reliability See unit rating label Do not install unit in system where voltage or phase imbalance 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 of adequate size to handle unit starting current Locate disconnect within sight from and readily accessib
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