Carrier 38AU- Manual
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Table of Contents:
- Page 2 – SAFETY CONSIDERATIONS; WARNING; INSTALLATION GUIDELINE
- Page 3 – CAUTION
- Page 10 – A U Z
- Page 11 – Matching 38AU Model To Evaporator Coil; Table 3 – Evaporator Coil Connections; INSTALLATION; Jobsite Survey; Step 1 — Plan for Unit Location; NOTE; Step 2 — Complete Pre-Installation Checks; Check Unit Electrical Characteristics:
- Page 12 – Step 5 — Complete Refrigerant Piping
- Page 13 – Liquid Lift —
- Page 14 – Table 7 –; 8AU Maximum Suction Pipe Size; Vertical Separation (outdoor unit above indoor unit) –
- Page 15 – Table 9 – Refrigerant Specialties Part Numbers.
- Page 16 – drop
- Page 17 – Preliminary Charge —; Step 6 — Install Accessories
- Page 18 – Step 7 — Complete Electrical Connections; to be connected to a 208-v power supply, the control
- Page 19 – Convenience Outlets —
- Page 20 – Convenience Outlet Utilization; NOTICE; ELECTRICAL OPERATION HAZARD; Installing Weatherproof Cover
- Page 22 – Table 10 – Unit Wire/Fuse or HACR Breaker Sizing Data; Legend and Notes for Table 10
- Page 23 – System Check; Turn on the crankcase heater for 24 hours before starting; Preliminary Checks
- Page 24 – Start Unit
- Page 32 – OPERATING SEQUENCE; Base Unit Controls; Cooling, Unit Without Economizer —
- Page 33 – Refrigeration System
- Page 34 – SEAT
- Page 35 – Comfort Alert Diagnostic Module
- Page 36 – Table 11 – LED Status Codes
- Page 37 – Compressor Protection
- Page 38 – Condenser Fans/Motors
- Page 42 – Coil Type Identification
- Page 44 – FASTENER TORQUE VALUES; Table 13 – Torque Values; TROUBLESHOOTING
- Page 46 – APPENDIX A; Air Conditioner & Heat Pump with PURON; warnings; APPENDIX B; Wiring Diagram List; Unit
- Page 47 – APPENDIX C; Low Ambient Option — Factory Installed; Speed Control Sensor Resistance —
- Page 49 – Table 14 – Wind Baffle Dimension
- Page 52 – BOTT
- Page 56 – CHECK VOLTAGE IMBALANCE
1
38AU
Air Cooled Condensing Units
60 Hz
With Puron
R
(R --- 410A) Refrigerant
Sizes 16 --- 25
Installation, Start --- Up and
Service Instructions
CONTENTS
SAFETY CONSIDERATIONS
2
. . . . . . . . . . . . . . . . . . . .
INSTALLATION GUIDELINES
2
. . . . . . . . . . . . . . . . . .
Replacement/Retrofit — R--22 to Puron
2
. . . . . . . . . . .
INSTALLATION
11 - 22
. . . . . . . . . . . . . . . . . . . . . . . . .
Jobsite Survey
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 1 -- Plan for Unit Location
11
. . . . . . . . . . . . . . . . .
Step 2 -- Complete Pre--Installation Checks
11
. . . . . . . .
Step 3 – Prepare Unit Mounting Support
12
. . . . . . . . . .
Step 4 – Rig and Mount the Unit
12
. . . . . . . . . . . . . . . .
Step 5 – Complete Refrigerant Piping Connections
12
. . .
Step 6 – Install Accessories
17
. . . . . . . . . . . . . . . . . . . .
Step 7 – Complete Electrical Connections
18
. . . . . . . . .
PRE-START-UP
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Check
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn On Crankcase Heater
23
. . . . . . . . . . . . . . . . . . . . .
Preliminary Charge
23
. . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP
23 - 31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preliminary Checks
23
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Start Unit
24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATING SEQUENCE
32
. . . . . . . . . . . . . . . . . . . . . .
Indoor (Supply) Fan
32
. . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling, Unit Without Economizer
32
. . . . . . . . . . . . . .
Cooling, Unit With Economizer
32
. . . . . . . . . . . . . . . . .
Heating
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ROUTINE SYSTEM MAINTENANCE
33
. . . . . . . . . . . .
Quarterly Inspection (and 30 days after initial start)
33
. . .
Seasonal Maintenance
33
. . . . . . . . . . . . . . . . . . . . . . . .
SERVICE
33 - 44
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration System
33
. . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Oil
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Systems on Roofs with
Synthetic Materials
33
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Liquid Line Filter Drier
34
. . . . . . . . . . . . . . . . . . . . . . .
Field Refrigerant Access Ports
34
. . . . . . . . . . . . . . . . . .
Factory High--Flow Access Ports
34
. . . . . . . . . . . . . . . .
Comfort Alert Diagnostic Module
35
. . . . . . . . . . . . . . .
Compressor Protection
37
. . . . . . . . . . . . . . . . . . . . . . . .
Crankcase Heater
37
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low--Pressure Switch
37
. . . . . . . . . . . . . . . . . . . . . . . . .
High--Pressure Switch
37
. . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Fans
37
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication
37
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coil Type Identification
42
. . . . . . . . . . . . . . . . . . . . . . .
NOVATION
t
Coil Cleaning and Maintenance
42
. . . . .
Repairing NOVATION Condenser Tube Leaks
42
. . . . .
Replacing NOVATION Condenser Coil
43
. . . . . . . . . . .
Routine Cleaning of Round-Tube Plate Fin
(RTPF) Coils
43
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fastener Torque Values
44
. . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING
44 -- 45
. . . . . . . . . . . . . . . . . . . . .
APPENDIX A
Air Conditioner & Heat Pump with Puron
R
—
Quick Reference Guide
46
. . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX B
Wiring Diagram List
46
. . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX C
Low Ambient Option — Factory Installed
47
. . . . . . . . . .
START--UP CHECKLIST
55 -- 56
. . . . . . . . . . . . . . . . . . .
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Summary
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 inf...
3 Same tube sizes are capable of handling higher flowrates (expressed as tons of cooling capacity) with Puron refrigerant compared to R--22 at constant pressure drops. For example, a 1 / 2 --inch OD liquid line is rated at 33% higher tons with Puron R than with R--22 (at 5 _ F pressure drop). A 1 1 ...
10 Model Type 38AU= Carrier Condensing Unit Puron ® R --- 410A Refrigerant Type of Coil D = Dual Circuit, A/C Scroll Compressor Z = Single Circuit, A/C Scroll Compressor Refrigerant Options A = None B = Low Ambient Nominal Tonnage 16 = 15 Tons 25 = 20 Tons Not Used A = Not Used Not Used 0 = Not Used...
