Instruction/ maintenance manual of the product 38AUQ Carrier
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Inst allation, S t art-Up and Service Instructions CONTENTS SA FE TY C ON SI DE RA TI ON S . . . . . . . . . . . . . . . . . . . . . . . 1 INST ALLA TION GUIDELI NES . . . . . . . . . . . . . . . . . . . . . . . 2 IN ST A LLA T IO N . . . . . . . . . .
2 INST AL LA TION GUIDELIN E Replacem ent /Retrofit – R22 to Pu ron ® Split system heat pumps are intended to be installed with matching indoor sections only . The 38AUQ heat pump outdoor units are matched only with sa me-size 40RUQ indoor sections.
3 Fig. 1 — 38AUQ*07-12 Unit Dimensions UNIT St andard Weig ht Corne r A Corner B Corner C Corner D Center of Gravity Unit Height lbs. kg. lbs. kg. lbs.
4 Table 1A — Physical Data — 38AUQ*07-12 Units — 60 Hz English UNIT SIZE 38AUQ *07 *08 *12 NOMINAL CAP ACITY (ton s) 67 . 5 1 0 OPERA TING WEIGHTS (lb) Aluminum-Fin Coils 444 483 575 REFRIGERANT TYPE ‡ R-410A Operating Charge, T ypical (l b) † 18.
5 Table 1B — Physical Data — 38AUQ*07-12 Units — 60 Hz SI UNIT SIZE 38AUQ *07 *08 *12 NOMINAL CAP ACITY (kW) 21.1 26.4 35.1 OPERA TING WEIGHT (kg) Aluminum-Fin Coils 201 219 261 REFRIGERANT TYPE ‡ R-410A Operating Charge, T ypical (kg ) † 8.
6 Fig. 2 — Model Number Nomenclature Fig. 3 — Serial Number Nomenclature 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 38 A U Q A 12 A 0 C 6– 0 A 0 A 0 Model T ype Pa cka g in g 3 8A U= C ar r ie.
7 . INST AL LA TION Jobsite Survey Complete the following checks before installation. 1. Consult local building codes and the NEC (National Electrical Code) ANSI/NFP A 70 for special installation requirements. 2. Determine unit location (from project plans) or select unit location.
8 Table 2 — 38AUQ*0 7-12 Piping Recomme ndations (Singl e-Circuit Unit) CHECK VER TICAL SEP ARA TION — If there is any vertical separation between the indoor and outdoor units, check to ensure that the separation is within allowable limits. Relocate equipment if necessary .
9 Table 5 — Refrigerant Specia lties Part Numbers. INST ALL LIQUID LINE SOLENOID V AL VE — It is recommended that a bi-directional solenoid valve be placed in the main liquid line (see Figs. 5 & 6) between the outdoor unit and the indoor coil.
10 MAKE PIPING CONNECTIONS — Piping connections at the 38AUQ unit are ball valves with stub tube ex tensions. Do not open the unit service valves until all interconnecting tube brazing as been completed. The stub tube connections include ¼-in SAE service fittings with Schrader valve cores (see Fig.
11 Field power wires are connected to the unit at line-side pres- sure lugs on compressor contac tor C and TB1 (see wiring dia- gram label for control box component arrangement) or at facto- ry-installed option non-fused disc on nect switch. Max wire size is #4 A WG (copper only).
12 Fig. 10 — Convenience Outlet Location Non-powered type: This type requires the field installation of a general-purpose 125-volt 15-A circuit powered from a source elsewhere in the building. Observe national and local codes when selecting wire size, fuse or breaker requirements and disconnect switch size and loca tion.
13 Press the gasket over the screw heads. Slip the backing plate over the screw heads at the keyhole slots and align with the gasket; tighten the two screws until snug (do not over-tighten). Mount the weatherproof cover to the backing plate as shown in Fig.
14 Table 8 — Electrical Data — 38AUQ*07-12 60 Hz Units LEGEND UNIT SIZE 38AUQ F ACTOR Y - INST ALLED OPTION NOMINAL V O LTA G E VOL T AGE RANGE ‡ COMPRESSOR F AN MOTORS POWER SUPPL Y V -Ph-Hz MIN MAX RLA LRA FLA (ea) QTY MCA MOCP *07 NONE OR DISCONNECT 208/230- 3-60 187 253 19.
15 PRE-ST AR T -UP System Check 1. Check all indoor section and other equipment auxiliary components. Consult the manufacturer ’ s instructions regarding any other equip m ent connected to the con- densing unit. If the unit ha s field-installed accessories, be sure all are properly installed and correctly wired.
16 Advanced Scroll T emperatur e Protection (ASTP) A label located above the terminal box identifies Copeland Scroll compressor models that contain this technology .
17 Fig. 16 — 38AUQ*07 Charging Chart Fig. 17 — 38AUQ*08 Charging Chart Fig. 18 — 38AUQ*12 Charging Chart.
18 Fig. 19 — 38AUQ Wiring Di agram (208/230-3-60 shown).
19 OPERA TING SEQUENCE Base Unit Controls — Indoor (Supply) Fan The indoor fan contactor (IFC) is remotely located at the fan coil or fan section. If the thermostat fan operation is selected as Continuous, the IFC is energi zed and the indoor (supply) fan motor runs continuously .
20 ROUTINE SYSTEM MAINTENANCE These items should be part of a routine maintenance program, to be checked every month or two, until a specific schedule for each can be identified for this installation: Quarterly Inspection (and 30 days after initial start) Indoor section • Coil cleanliness checked.
21 Liquid Line Filter Drier The factory-provided reversible filter drier is specifically de- signed to operate with Puron®. Replace the filter drier with factory-authorized components only with a filter drier with desiccant made from 100% molecular sieve grade XH-11.
22 Heat Pump Controls Compressor Pr otection Compressor Over current The compressor has internal limbered motor protection. Compressor Overtemperature The compressor has an intern al protector to protect it against excessively high discharge gas temperatures.
23 Fig. 21 — Defrost Co ntrol Board (DFB) Location Fig. 22 — Defrost Control Board (DFB) Arrangement Reversing valve contr ol The DFB has two outputs for unit reversing valve control.
24 Defrost Thermostats These are temperature switches that monitor the surf ace tem- perature of the outdoor coil circuits. These switches are mount- ed on the liquid tube exiting the outdoor coil heating circuits. These switches close on temperature drop at 30°F (-1°C) and reset open on temperature rise at 80°F (27°C).
25 Fig. 24 — 38AUQ*07 Exterior Fig. 25 — 38A UQ*07 Interior Fans Service V alves LOC HPS High Flow Access Ports Outdoor Coil Defrost Thermostat (DFT).
26 Fig. 26 — 38AUQ*08 Exterior Fig.27 — 38AUQ*08 Interior Fans Service V alves LOC HPS High Flow Access Ports Outdoor Coil Defrost Thermostat (DFT).
27 Fig. 28 — 38AUQ*12 Exterior Fig. 29 — 38A UQ*12 Interior Fans Service V alves LOC HPS High Flow Access Ports Outdoor Coil Defrost Thermostat (DFT).
28 COMFOR T ALER T DIAGNOSTIC MODULE The Comfort Alert Diagnostic Module (CADM) monitors and analyzes data from the Copeland Scroll ® three-phase compres- sor and the thermostat demand. The CADM also provides a 3-minute anti-recycle time delay to compressor cycling.
29 Table 14 — LED Status Codes Status LED St atus LED Description St atus L ED T roubleshootin g Information Green “POWER” Module has power Supply voltage is present at module terminals Red “TRIP” LED On Solid Thermostat demand signal Y is present, but the compressor is not running.
30 Table 15 — CADM Troubleshooting Lubrication F AN MOT ORS have sealed bear ings. No provisions are made for lubrication. COMPRESSOR has its own oil supply . Loss of oil due to a leak in the system should be the only reason for adding oil after the system has been in operation.
31 Clean coil as follows: 1. T urn off unit power , tag disconnect. 2. Remove top panel screws on outdoor coil end of unit. 3. Remove coil corner post. T o hold top panel open, place coil corner post between top panel and center post. 4. Remove screws securing coil to compressor plate and compressor acce ss panel.
32 TROUBLESHOOTING PROBLEM CAUSE REMEDY Compressor and Outdoor Fan Will Not St art. Power failure. Call power company . Fuse blown or circuit breaker tr ipped. Replace fuse or reset circuit breaker . Determine root cause. Defective thermostat, contactor , transforme r , control relay , or capa citor .
33 APPENDIX A AIR CONDITIONER AND HEA T PUMP WITH PURON ® — QUICK REFERENCE GUIDE •P u r o n ® (R-410A) refrigerant operates at 50 percent to 70 percent higher pressures than R-22. Be sure that servicing equipment and re placement components are designed to operate with Puron ® .
Copyright 2009 Ca rrier Corp • 7310 W . Morris S t. • Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 09/09 Catalog No: 38AUQ-01SI Manufacturer reserves the right to change, at any time, spec ifica tions and designs without notice and without obligations.
CL-1 III. ST ART UP ST ART -UP CHECKLIST I. PRELIMINAR Y INFORMA TION OUTDOOR: MODEL NO. SERIAL NO. INDOOR: AIR HANDLER MANUF ACTURER MODEL NO. SERIAL NO. ADDITIONAL ACCESSORIES II. PRE-ST ART -UP OUTDOOR UNIT IS THERE ANY SHIPPING DAMAGE? (Y/N) IF SO, WHERE: WILL THIS DAMAGE PREVENT UNIT ST AR T -UP? (Y/N) CHECK POWER SUPPL Y .
Copyright 2009 Carr ier Corp • 7310 W . Morris S t. • Indianapolis, IN 46231 Printed in U.S.A. E dition Date: 1 1 / 09 Catalog No: 38AUQ-01SI Manufacturer reserves the right to change, at any time, spec ifications and designs without notice and without obligations.
An important point after buying a device Carrier 38AUQ (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Carrier 38AUQ yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Carrier 38AUQ - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Carrier 38AUQ you will learn all the available features of the product, as well as information on its operation. The information that you get Carrier 38AUQ will certainly help you make a decision on the purchase.
If you already are a holder of Carrier 38AUQ, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Carrier 38AUQ.
However, one of the most important roles played by the user manual is to help in solving problems with Carrier 38AUQ. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Carrier 38AUQ along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
