Carrier 38AU- User Manual

Carrier 38AU

Carrier 38AU– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 2 – INSTALLATION GUIDELINE; Replacement /Retrofit – R22 to Puron
  • Page 8 – A U Z
  • Page 9 – Matching 38AU Model To Evaporator Coil –; Table 3 — Evaporator Coil Connections; INSTALLATION; Jobsite Survey; Fig. 4 — Service Clearance Dimensional Drawing; Step 2 — Complete Pre-Installation Checks; UNIT DAMAGE HAZARD
  • Page 10 – Table 4 — Equivalent Lengths for Common Fittings (ft)
  • Page 11 – Table 7 — 38AU Maximum Suction Pipe Size
  • Page 12 – Fig 5 - 38AUD Service Valve Locations
  • Page 14 – Step 6 — Install Accessories; Field Power Supply —; ELECTRICAL SHOCK HAZARD; Do not use gas piping as an electrical ground.
  • Page 15 – Fig. 10 — Disconnect Switch and Unit; Units Without Factory-Installed Disconnect —; Fig.11 — Power Wiring Connections; Convenience Outlets —; FIRE HAZARD; ELECTRICAL OPERATION HAZARD
  • Page 16 – Installing Weatherproof Cover –
  • Page 17 – Fig. 14 — Weatherproof Cover Installation; All Units —; Fig. 15 — Typical Remote Thermostat Connections
  • Page 19 – System Check; The crankcase heater must be firmly attached to the com-; Turn On Crankcase Heater; Turn on the crankcase heater for 24 hours before starting the; Preliminary Charge
  • Page 20 – Advanced Scroll Temperature Protection (ASTP); Fig. 17 — Advanced Scroll Temperature; Start Unit
  • Page 25 – Fig. 24 — Typical 38AUD Wiring Diagram (50Hz Dual Circuit Unit Shown)
  • Page 26 – OPERATING SEQUENCE; Base Unit Controls; ROUTINE SYSTEM MAINTENANCE; Quarterly Inspection; Indoor section; Seasonal Maintenance; Air Conditioning
  • Page 27 – SERVICE; SYNTHETIC ROOF PRECAUTIONARY PROCEDURE; Fig. 25 — CoreMax Access Port Assembly; EQUIPMENT DAMAGE HAZARD; SEAT
  • Page 28 – Comfort Alert Diagnostic Module; Input
  • Page 29 – Table 13 — LED Status Codes
  • Page 30 – Table 14 — CADM Troubleshooting
  • Page 31 – Condenser Fans
  • Page 33 – NOVATIONTM Coil Cleaning and Maintenance —; Fig. 31 — Pivot and Support Top Cover; Repairing NOVATION Condenser Tube Leaks; FASTENER TORQUE VALUES; Table 15 — Torque Values
  • Page 34 – TROUBLESHOOTING
  • Page 36 – APPENDIX A; AIR CONDITIONER AND HEAT PUMP WITH; warnings; APPENDIX B; WIRING DIAGRAM LIST
  • Page 37 – APPENDIX C; MOTORMASTER SENSOR LOCATIONS; Sensor
  • Page 39 – I. PRELIMINARY INFORMATION; OUTDOOR UNIT
Loading the manual

Installation, Start-Up and

Service Instructions

CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-19

Step 1 – Plan for Unit Location . . . . . . . . . . . . . . . . . . . 9
Step 2 – Complete Pre-Installation Checks. . . . . . . . . . 9
Step 3 – Prepare Unit Mounting Support . . . . . . . . . . 9
Step 4 – Rig and Mount the Unit . . . . . . . . . . . . . . . . . . 9
Step 5 – Complete Refrigerant Piping Connections . . 10
Step 6 – Install Accessories. . . . . . . . . . . . . . . . . . . . . . 14
Step 7 – Complete Electrical Connections . . . . . . . . . 14

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Turn On Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . 19
Preliminary Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 -25

38AU Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

OPERATING SEQUENCE. . . . . . . . . . . . . . . . . . . . . . . . . . 26

Indoor (Supply) Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cooling, Unit Without Economizer . . . . . . . . . . . . . . . . 26
Cooling, Unit With Economizer . . . . . . . . . . . . . . . . . . . 26
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

ROUTINE SYSTEM MAINTENANCE. . . . . . . . . . . . . . . 26

Quarterly Inspection (and 30 days after initial start) . . 26
Seasonal Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 26

SERVICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 - 33

Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . 27
Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Servicing Systems on Roofs with

Synthetic Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Liquid Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . 27
Filed Refrigerant Access Ports . . . . . . . . . . . . . . . . . 27
Factory High-flow Access Ports . . . . . . . . . . . . . . . . 27
Comfort Alert Diagnostic Module . . . . . . . . . . . . . . . 28
Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Compressor Protection. . . . . . . . . . . . . . . . . . . . . . . . . . 30
Low-Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . 30
High-Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . 30
Outdoor Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
NOVATION™ Coil Cleaning and Maintenance . . . . 33

Repairing NOVATION Condenser Tube Leaks . . . . 33
Replacing NOVATION Condenser Coil . . . . . . . . . . 33
Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
Fastener Torque Values . . . . . . . . . . . . . . . . . . . . . . . 333

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 34 -35
APPENDIX A

Air Conditioner and Heat Pump with Puron

®

–

Quick Reference Guide . . . . . . . . . . . . . . . . . . . . . . . 36

APPENDIX B

Wiring Diagram List . . . . . . . . . . . . . . . . . . . . . . . . . 36

APPENDIX C

Motormaster Sensor Locations . . . . . . . . . . . . . . . . . 37

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . .CL-1, CL-2

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 package
Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloths for brazing operations and have a fire

extinguisher available. Read these instructions thoroughly and

follow all warnings or cautions attached to the unit. Consult

local building codes for special requirements. In absence of

local codes, it is recommended that the (USA standard ANSI/

NFPA70, National Electrical Code (NEC), be followed.
It is important to recognize safety information. This is the

safety-alert symbol

. When you see this symbol on the unit

and in instructions or manuals, be alert to the potential for

personal injury.
Understand the signal words DANGER, WARNING,

CAUTION, and NOTE. These words are used with the safety-

alert symbol. DANGER identifies the most serious hazards

which

will

result 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

may

result in minor personal injury or product and

property damage. NOTE is used to highlight suggestions

which

will

result in enhanced installation, reliability, or

operation.

38AU

Air-Cooled Condensing Units

50 Hz

with Puron

®

(R-410A) Refrigerant

Sizes 07 - 14

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Summary

Page 2 - INSTALLATION GUIDELINE; Replacement /Retrofit – R22 to Puron

2 INSTALLATION GUIDELINE Replacement /Retrofit – R22 to Puron ® Replacement/retrofit installations require change-out of outdoor unit, metering device, and filter driers. Change-out of indoor coil (evaporator) and interconnecting tubing is recommended. Existing evaporator coil – If the existing evap...

Page 8 - A U Z

8 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 3 8 A U Z A 0 7 A 0 G 9 – 0 A 0 A 0 Model Type Packaging 38AU= Carrier Condensing Unit R --- 410A Refrigerant 0 = Standard Type of Coil Electrical Options D = Dual Circuit, A/C Scrol...

Page 9 - Matching 38AU Model To Evaporator Coil –; Table 3 — Evaporator Coil Connections; INSTALLATION; Jobsite Survey; Fig. 4 — Service Clearance Dimensional Drawing; Step 2 — Complete Pre-Installation Checks; UNIT DAMAGE HAZARD

9 Matching 38AU Model To Evaporator Coil – The Model 38AUZ is a single-circuit unit design, requiring one set of refrigeration piping. This model can be connected to an evaporator coil with one circuit or with two circuits (by mani- folding the evaporator connections into a single piping system).The...

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