Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53380020-01
Printed in U.S.A.
Form 38AU-7-14-03SI
Pg 1
1-19
Replaces: 38AU-7-14-02SI
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION GUIDELINES
. . . . . . . . . . . . . . . . . . . . . 2
Replacement/Retrofit — R-22 to Puron
. . . . . . . . . . . 2
Rated Indoor Airflow (cfm)
. . . . . . . . . . . . . . . . . . . . . . . 3
Identify Factory Options
. . . . . . . . . . . . . . . . . . . . . . . . . 3
Matching 38AU Model to Evaporator Coil
. . . . . . . . 3
General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Jobsite Survey
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 1 — Plan for Unit Location
. . . . . . . . . . . . . . . . . . 6
Step 2 — Complete Pre-Installation Checks
. . . . . . 7
Step 3 — Prepare Unit Mounting Support
. . . . . . . . 7
Step 4 — Rig and Mount the Unit
. . . . . . . . . . . . . . . . . 7
Step 5 — Determine Refrigerant Line Sizes
. . . . . . 7
Suction Riser
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 6 — Complete Refrigerant Piping
Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 7 — Install Accessories
. . . . . . . . . . . . . . . . . . . . 14
Step 8 — Complete Electrical Connections
. . . . . . 14
Step 9 — Wind Baffles for Low Ambient
Control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PRE-START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
System Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Turn on Crankcase Heater
. . . . . . . . . . . . . . . . . . . . . . 23
Preliminary Charge
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Preliminary Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Start Unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
OPERATING SEQUENCE
. . . . . . . . . . . . . . . . . . . . . . . . 32
Base Unit Controls
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
38AUDC with SVR Relays
. . . . . . . . . . . . . . . . . . . . . . . 33
All Units
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
MAINTENANCE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Quarterly Inspection (and 30 Days After
Initial Start)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Seasonal Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . 34
SERVICE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Refrigeration System
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Comfort Alert Diagnostic Module
. . . . . . . . . . . . . . . 36
Compressor Protection
. . . . . . . . . . . . . . . . . . . . . . . . . 38
Fastener Torque Values
. . . . . . . . . . . . . . . . . . . . . . . . . 39
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Appendix A — Air Conditioner and Heat Pump
with Puron® Quick Reference Guide
. . . . . . . . . 41
Appendix B — Wiring Diagram List
. . . . . . . . . . . . . 42
Appendix B — Low Ambient-Option,
Factory Installed
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
START-UP CHECKLIST
. . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, main-
tenance, 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 quali-
fied installer or agency must use factory-authorized kits or ac-
cessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
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. Con-
sult local building codes and appropriate national electrical
codes (in USA, ANSI/NFPA 70, National Electrical Code
(NEC); in Canada, CSA C22.1) for special requirements.
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 per-
sonal injury.
Understand the signal words DANGER, WARNING, CAU-
TION, 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 signi-
fies hazards which
could
result in personal injury or death.
CAUTION is used to identify unsafe practices, which
may
re-
sult in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which
will
result in en-
hanced installation, reliability, or operation.
WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect gas piping from unit when leak testing at pres-
sure greater than 0.5 psig (3450 Pa). Pressures greater than
0.5 psig (3450 Pa) will cause gas valve damage resulting in
hazardous condition. If gas valve is subjected to pressure
greater than 0.5 psig (3450 Pa), it must be replaced before
use. When pressure testing field-supplied gas piping at
pressures of 0.5 psig (3450 Pa) or less, a unit connected to
such piping must be isolated by closing the manual gas
valve.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury
or death.
Before performing service or maintenance operations on
unit, always turn off main power switch to unit and install
lock(s) and lockout tag(s). Unit may have more than one
power switch.
Gemini™
38AU07-14
Air-Cooled Condensing Units
with Puron
®
(R-410A) Refrigerant
Summary of Contents for Gemini 38AU07 Series
Page 5: ...5 Fig 3 38AUD Z 07 14 Base Unit Dimensions ...
Page 19: ...19 Fig 17 Typical Single Circuit Single Stage 38AUZ Wiring Diagrams ...
Page 20: ...20 Fig 18 Typical Single Circuit Two Stage 38AUZ Wiring Diagram ...
Page 21: ...21 Fig 19 Typical Dual Circuit Two Stage 38AUD Wiring Diagram ...
Page 30: ...30 Fig 30 38AUZD E08 Charging Chart RTPF 7 5 Ton Dual Stage Charging Chart R 410A Refrigerant ...
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