Carrier 38QH Air Conditioner User Manual
Contents
1. A92446 Fig 1 38TXA INSPECT EQUIPMENT File claim with shipping company prior to installation if shipment is damaged or incomplete Locate unit rating plate on unit corner panel See Fig 4 It contains information needed to properly install unit Check rating plate to be sure unit matches job specifications Step 2 Install on a Solid Level Mounting Pad If conditions or local codes require 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 4 to determine base pan size and knockout hole location When installing allow sufficient space for airflow wiring refrig erant piping and service Allow 30 in clearance to service end of unit and 48 in above unit For proper airflow a 6 in clearance on 1 side of unit and 12 in on all remaining sides must be maintained Maintain a distance of 24 in between air conditioners Position so snow ice and water from roof or eaves cannot fall directly on unit On rooftop applications locate unit at least 6 in 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 Install TXV Optional The accessory thermostatic expansion valve is specifically de signed to op2. ee HEATING amp COOLING 38TXA 13 0 SEER Air Conditioner With R 410A 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 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 pack aged with the kits or accessories when installing Follow all safety codes Wear safety glasses and work gloves Use quenching cloth for brazing operations Have fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions attached to the unit Consult local building codes and the National Electrical Code NEC for special instal lation requirements Recognize safety information This is the safety alert symbol When you see this symbol on the unit or in instructions and 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 result in severe person
3. CORPORATE NON PROGRAMMABLE THERMOSTAT FA FB FC MODEL AC FAN COIL 24 VAC HOT 24 VAC COM HEAT STAGE 1 Aa COOL STAGE 1 INDOOR FAN A94385 CORPORATE PROGRAMMABLE THERMOSTAT ER FE FC MODEL AC FANGOIL CONDITIONER 24 VAC HOT INDOOR FAN HEAT STAGE 1 COOL STAGE 1 NOT USED NOTE NOT USED 24 VAC COM NOT USED NOT USED OPTIONAL OUTDOOR SENSOR CONNECTION A94387 Fig 7 Typical 24 v Circuit Connections 24 VAC HOT CORPORATE NON PROGRAMMABLE THERMOSTAT FK4C AIR MODEL AC FAN COIL CONDITIONER 24 VAC HOT R fz71 R eavaccom HEAT STAGE 1 w wit 4 4 w1 SEE 2 COOL STAGE 1 2 1 v INDOORFAN G 1 1 w2 Y1 Duy A95502 NON CORPORATE NON PROGRAMMABLE THERMOSTAT E FC MODEL AC FAN COIL CONDITIONER HEAT STAGE 1 E2 COOL STAGE 1 INDOOR FAN Ata A95282 CORPORATE PROGRAMMABLE THERMOSTAT FK4C AIR MODEL AC FAN COIL CONDITIONER 24 VAC HOT RoW TLR INDOOR FAN G G HEAT STAGE 1 W W1 4 44 W1 COOL STAGE 1 y v2 4 4fyrva 4 R NOT USED 2 O SEE NOT USED 1 2 y1 NOTE w2 24 VAC COM 4 R NOT USED B Dy NOT USED L COOL ST
4. 2 The piston ring will ensure piston stays seated during all operating conditions Step 5 Make Piping Connections A CAUTION Do not leave system open to atmosphere any longer than minimum required for installation POE oil in compressor is extremely susceptible to moisture absorption Always keep ends of tubing sealed during installation 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 consult Application Guideline and Service Manual for air conditioners with R 410A 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 unnecessary turns and bends 4 Leave some slack between structure and unit to absorb vibration 5 When passing refrigerant tubes through wall seal opening with RTV or other pliable silicon based caulk See Fig 3 6 Avoid direct lineset 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 3 NOTE Avoid contact between tubing and structure OUTDOOR WALL INDOOR WALL CAULK 6 LIQUID TUBE WA a VAPO
5. cloth tubing set can be brazed to service valve and filter drier 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 8 Evacuate Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns The alternate triple evacuation method may be used if the procedure outlined in the Service Manual is followed Always break a vacuum with dry nitrogen A CAUTION Never use the system compressor as a vacuum pump Step 9 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 plate Contact local power company for correction of improper voltage See unit rating plate for recommended circuit protection device See Fig 4 NOTE Operation of unit on improper line voltage constitutes abuse and could affect unit reliability See unit rating plate NOTE Use only copper wire between disconnect switch and unit NOTE Install branch circuit disconnect per NEC of adequate size to handle unit starting current but not larger than maximum fuse size shown on unit rating plate Locate disconnect within sight from and readily accessible from unit per Section 440 14 of NEC ROUTE GROUND AND POWER WIRES R
6. 30 036 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 Note 1 Tube diameters are for lengths up to 50 ft For tubing lengths greater than 50 ft consult Application Guideline and Service Manual for air condition ers with R 410A Step 6 Install Liquid Line Filter drier See Fig 5 1 Braze 5 in connector tube to liquid service valve Wrap filter drier with damp cloth 2 Braze filter drier between connector tube and liquid tube to indoor coil Flow arrow must point towards indoor coil LIQUID LINE FILTER DRIER LIQUID SERVICE TUBE A95509 Fig 5 Liquid Line Filter drier Step 7 Refrigerant Tubing Connect vapor tube to fitting on outdoor unit vapor service valve and connect liquid tube to filter drier See Fig 5 CAUTION A brazing shield MUST be used when tubing sets are being brazed to the service valves to prevent damage to the painted unit surface A WARNING Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid personal injury or death Use all service ports and open all flow control devices including solenoid valves A CAUTION To avoid valve damage while brazing service valves must be wrapped with a heat sinking material such as a wet cloth SWEAT CONNECTION Use refrigerant grade tubing Service valves are closed from factory and ready for brazing After wrapping service valve and filter drier with wet
7. AGE 5 INDOOR FAN s2 A95503 NON CORPORATE NON PROGRAMMABLE THERMOSTAT MODEL AC 24 VAC HOT SINGLE STAGE AIR FURNACE CONDITIONER HEAT STAGE 1 COOL STAGE 1 INDOOR FAN A95283 Fig 7 Typical 24 v Circuit Connections Continued NON CORPORATE NON PROGRAMMABLE SEE NOTE 2 THERMOSTAT FK4C AIR MODEL AC FAN COIL CONDITIONER 24 VAC HOT R fqq N HEAT STAGE 1 W 1 11 w1 COOL STAGE 1 Y 1 1 2 A INDOOR FAN we Lo Y1 Dy A95501 Fig 7 Typical 24 v Circuit Connections Continued NOTES 1 Corporate thermostat wiring diagrams are only accurate for model numbers beginning with 2 Some units are equipped with pressure switches temperature switch or 5 minute compressor cycle protection Connect 24 v field wiring to factory provided stripped leads 3 Wiring must conform to NEC or local codes 4 To stage the electric resistance heat consult outdoor thermostat Installation Instructions LEGEND 24 VOLT FACTORY WIRING 24 VOLT FIELD WIRING FIELD SPLICE CONNECTION CONTACTOR A95500 Fig 8 Typical 24 v Circuit Connections Legend Copyright 1996 CARRIER Corp 7310 W Morris St Indianapolis 46231 38 815 Manufacturer reserves the right to discontinue or change at any time specificat
8. IAL AIR DISCHARGE AIR IN UNIT RATING gre PLATE VAPOR LINE CONN FIELD POWER SUPPLY CONN 7 3 IN DIA HOLE WITH 1 1 8 IN DIA KNOCKOUT A AND 1 3 8 IN DIA KNOCKOUT ACCESS PANEL g FIELD CONTROL SUPPLY CONN 7 g IN DIA HOLE 5 a 3 IN DIA LIQUID LINE CONN A LC O A92471 UNIT A B D E SIZE In In In In In 024 060 34 15 16 30 8 3 16 4 9 3 4 Fig 4 Unit Reference Drawing A CAUTION 4 CAUTION In some cases noise in the living area has been traced to gas Installation of filter drier in liquid line is required pulsations from improper installation of equipment OUTDOOR UNITS CONNECTED TO FACTORY APPROVED INDOOR UNITS Outdoor unit contains correct system refrig erant charge for operation with tested indoor unit listed in presale literature when connected by 15 ft of field supplied or factory accessory tubing Check refrigerant charge for maximum effi ciency Table 1 Refrigerant Connections and Recom mended Liquid and Vapor Tube Diameters In LIQUID VAPOR UNIT SIZE Connect Tube Connect Tube Diameter Diameter Diameter Diameter 024 3 8 3 8 5 8 5 8 0
9. R TUBE INSULATION THROUGH THE WALL OST HANGER STRAP AROSE OILY INSULATION 9 VAPOR TUBE 1 LIQUID TUBE SUSPENSION A94028 Fig 3 Piping Installation 8 Ensure that tubing insulation is pliable and completely sur rounds vapor line 9 When necessary use hanger straps which are 1 in wide and conform to shape of tubing insulation See Fig 3 10 Isolate hanger straps from insulation by using metal sleeves bent to conform to shape of insulation A CAUTION DO NOT BURY MORE THAN 36 IN OF REFRIGERANT TUBING IN GROUND If any section of tubing is buried there must be a 6 in vertical rise to the valve connections on the outdoor unit If more than the recommended length is buried refrigerant may migrate to cooler buried section during extended periods of unit shutdown causing refrigerant slugging and possible compressor damage at start up AIR IN AIR DISCHARGE 3 8 DIA TIEDOWN KNOCKOUTS 2 PLACES IN BASEPAN NOTES 1 Allow 30 in 762 mm clearance to service end of unit 48 in 1219 mm above unit 6 in 152 mm on one side 12 in 305 mm on remaining side and 24 in 610 mm between AIR IN units for proper airflow D 2 Minimum outdoor operating ambient in cooling mode is y 55 F 12 8 C unless low ambient control is used max 125 F 51 75 C Le 5 Series designation is the 13th position of the unit model number 6 Center of gravity 4 SER
10. al 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 CAUTION R 410A systems operate at higher pressures than standard R 22 systems Do not use R 22 service equipment or com ponents on R 410A equipment A WARNING Before installing or servicing system always turn off main power to system There may be more than 1 disconnect switch Turn off accessory heater power if applicable Elec trical shock can cause personal injury or death INSTALLATION Specifications for this unit in residential new construction market require outdoor unit indoor unit refrigerant tubing sets metering device and filter drier listed in presale literature There can be no deviation Consult Application Guideline and Service Manual to obtain required unit changes for specific applications and for R 22 retrofit Step 1 Check Equipment and Jobsite UNPACK UNIT Move to final location Remove carton taking care not to damage unit
11. an 100 ft from unit as measured along the control voltage wires use No 16 AWG color coded wire to avoid excessive voltage drop Use furnace transformer fan coil transformer or accessory trans former for control power 24v 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 transformer capacity or split load with an accessory transformer as required Step 10 Install Electrical Accessories Refer to individual instructions packaged with kits or accessories when installing Step 11 Start Up 1 After system is evacuated fully back seat open liquid and vapor service valves Unit is shipped with valve stem s front seated and caps installed 2 Replace stem caps after system is opened to refrigerant flow back seated Replace caps finger tight and tighten additional 1 12 turn with wrench 3 Close electrical disconnects to energize system 4 Be sure thermostat set point is below indoor ambient tempera ture Set room thermostat at COOL and fan at ON or AUTO as desired Operate unit for 15 minutes Check system refrigerant charge 5 Factory charge and superheat charging method are shown on unit information plate See Fig 4 R 410A refrigerant 4 CAUTION cylinders contain a dip tube which allows liquid refriger Do not vent refrigerant to atmosphere Recover for system ant to flow from cylinder in upright position Cha
12. emove 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 4 Size wires per NEC but not smaller than minimum wire size shown in presale literature A WARNING The cabinet must have an uninterrupted or unbroken ground according to NEC ANSI NFPA 70 1996 or local codes to minimize personal injury if an electrical fault should occur This may consist of electrical wire or conduit approved for electrical ground when installed in accordance with existing electrical codes Failure to follow this warning could result in an electrical shock fire or death A WARNING To avoid personal injury or death do not supply power to unit with compressor terminal box cover removed 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 N E C AND OR LOCAL CODES CONTACTOR FIELD POWER SONG ee ee ee BLUE a PHASE ONLY S FIELD GROUND WIRING GROUND LUG A94025 Fig 6 Line Power Connections CONNECT CONTROL WIRING Route 24 v control wires through control wiring grommet and connect to brown and blue pigtails supplied in unit splice box See Fig 7 Use No 18 AWG color coded insulated 35 C minimum wire If thermostat is located more th
13. erate with R 410A Do not use an R 22 TXV An 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 563 813 Tab 3a 2a Printed in U S A Form 38TXA 1SI Pg 1 1 96 Replaces New PISTON RETAINER PISTON RING ud PISTON Loy B N D gt A ger et 8 f STRAINER ia FLARE ADAPTOR LIQUID LINE STRAINER APPROX 2 LONG a STRAINER LABEL AFFIX TO LIQ LINE NEAR STRAINER LOCATION A95615 Fig 2 Accurater Components existing R 22 TXV must be replaced with a factory approved TX V specifically designed for R 410A To replace an R 22 TXV see accessory kit instructions NOTE FK4 fan coils are equipped with an R 22 TXV If an FK4 fan coil is used with an R 410A air conditioner the R 22 TXV must be replaced Step 4 Install AccuRater Piston and Ring ACCURATER PISTON 1 If unit is to be installed with a piston metering device check indoor piston to see if it matches required piston on outdoor unit rating plate If it does not match replace with piston shipped with outdoor unit The piston shipped with outdoor unit is correct for any approved indoor coil combination 2 After correct piston is installed locate brass piston ring shipped in piston bag Install piston ring behind metering piston as shown in Fig
14. ions or designs without notice and without incurring obligations Book 1 4 Catalog No 563 813 Printed in U S A Tab 3a 2a Form 38TXA 1Sl Pg 8 1 96 Replaces New
15. linders have a dip tube which allows liquid to flow out of cylinder in upright position e R 410A systems should be charged with liquid refrigerant Use a commercial type metering device in the manifold hose e R 410A as with other HFCs is only compatible with POE oils e Vacuum pumps will not remove moisture from oil Do not use liquid line filter driers with rated working pressures less than 600 psig Do not install a suction line filter drier in liquid line e POE oils absorb moisture rapidly Do not expose oil to atmosphere e Wrap all filter driers and service valves with wet cloth when brazing A liquid line filter drier is required on every unit Do not use an R 22 TXV If indoor unit is equipped with a TXV it must be changed to an R 410A TXV e Never open system to atmosphere while it is under a vacuum When system must be opened for service break vacuum with dry nitrogen and replace filter driers e Do not vent R 410A into the atmosphere Observe all warnings cautions and bold text Do not use capillary tube indoor coils CORPORATE NON PROGRAMMABLE THERMOSTAT MODEL AC 24 VAC HOT 24 VAC COM HEAT STAGE 1 NOTE 2 COOL STAGE 1 INDOOR FAN A94384 CORPORATE PROGRAMMABLE THERMOSTAT SINGLE MODEL AC FORNREE CONDITIONER 24 VAC HOT INDOOR FAN HEAT STAGE 1 COOL STAGE 1 NOT USED NOT USED 24 VAC COM NOT USED NOT USED OPTIONAL OUTDOOR SENSOR CONNECTION A94386
16. rge repair or final unit disposal R 410A units with cylinder in upright position and a commercial type metering device in manifold hose Charge CARE AND MAINTENANCE refrigerant into suction line For continuing high performance and to minimize possible equip A CAUTION ment failure it is essential that periodic maintenance be performed on this equipment Consult servicing contractor or User s Manual for the proper frequency of maintenance Frequency of mainte nance may vary depending upon geographic areas such as coastal applications Do not disable low pressure switch during a condenser pump down Compressor damage may occur if run at a negative suction pressure A CAUTION Step 1 Leave User s Manual With Homeowner Compressor damage may occur if system is overcharged Explain system operation and maintenance procedures outlined in User s Manual A WARNING Service valve gage ports are not equipped with Schrader valves To prevent personal injury make sure valves are fully back seated before removing gage port caps Wear safety glasses and gloves when handling refrigerant ATTENTION INSTALLERS AND SERVICE TECHNICIANS AIR CONDITIONER WITH R 410A QUICK REFERENCE GUIDE R 410A refrigerant operates at 50 70 higher pressures than R 22 Be sure that servicing equipment and replacement components are designed to operate with R 410A e R 410A refrigerant cylinders are rose colored e R 410A refrigerant cy
Download Pdf Manuals
Related Search