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50TC*17- 30
Nominal 15 to 27.5 Tons
With Puron ® (R-410A) Refrigerant
Service and Maintenance Instructions
TABLE OF CONTENTS
TABLE OF CONTENTS
1
. . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
1
. . . . . . . . . . . . . . . . . . . .
UNIT ARRANGEMENT AND ACCESS
3
. . . . . . . . . . .
SUPPLY FAN (BLOWER) SECTION
4
. . . . . . . . . . . . . .
STAGED AIR VOLUME (SAV) CONTROL: 2
−
SPEED
FAN WITH VARIABLE FREQUENCY DRIVE (VFD) 6
ADDITIONAL VFD INSTALLATION AND
TROUBLESHOOTING
7
. . . . . . . . . . . . . . . . . . . . . . . . . .
CONDENSER COIL SERVICE
8
. . . . . . . . . . . . . . . . . . .
EVAPORATOR COILS
10
. . . . . . . . . . . . . . . . . . . . . . . . .
HIMIDI
−
MIZER
DEHUMIDIFICATION SYSTEM 12
THERMOSTATIC EXPANSION VALVE (TXV)
17
. . . .
PURON
(R
−
410A) REFRIGERANT
19
. . . . . . . . . . . . .
COOLING CHARGING CHARTS
20
. . . . . . . . . . . . . . . .
COMPRESSORS
24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING THE COOLING SYSTEM
26
. .
CONVENIENCE OUTLETS
27
. . . . . . . . . . . . . . . . . . . .
SMOKE DETECTORS
28
. . . . . . . . . . . . . . . . . . . . . . . . .
INDICATORS
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PROTECTIVE DEVICES
35
. . . . . . . . . . . . . . . . . . . . . . .
PREMIERLINK
™
CONTROL
36
. . . . . . . . . . . . . . . . . . .
RTU
−
OPEN CONTROL SYSTEM
38
. . . . . . . . . . . . . . . .
ECONOMI$ER SYSTEMS
40
. . . . . . . . . . . . . . . . . . . . . .
PRE
−
START
−
UP/START
−
UP
49
. . . . . . . . . . . . . . . . . . . .
START
−
UP, PREMIERLINK
™
CONTROLS
50
. . . . . . .
START
−
UP, RTU
−
OPEN CONTROLS
51
. . . . . . . . . . . .
FASTENER TORQUE VALUES
51
. . . . . . . . . . . . . . . . .
APPENDIX I. MODEL NO. NOMENCLATURE
52
. . .
APPENDIX II. PHYSICAL DATA
53
. . . . . . . . . . . . . . . .
APPENDIX III. FAN PERFORMANCE
61
. . . . . . . . . . .
APPENDIX IV. WIRING DIAGRAMS
67
. . . . . . . . . . . .
APPENDIX V. MOTORMASTER SENSOR
LOCATIONS
80
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNIT START-UP CHECKLIST
81
. . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical
components. Only trained and qualified service personnel
should install, repair, or service air-conditioning
equipment. Untrained personnel can perform the basic
maintenance functions of replacing filters. Trained service
personnel should perform all other operations.
When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to
the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations.
Have fire extinguishers available for all brazing
operations.
Follow all safety codes. Consult local building codes and
National Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety
−
alert
symbol
. When you see this symbol on the unit and in
instructions or manuals, be aware of the potential for
physical injury hazards
.
Understand the signal words
DANGER
,
WARNING
, and
CAUTION
. These words are used with the safety
−
alert
symbol.
DANGER
identifies a hazardous situation which,
if not avoided,
will
result in death or severe personal
injury.
WARNING
indicates a hazardous situation which,
if not avoided,
could
result in death or personal injury.
CAUTION
indicates a hazardous situation which, if not
avoided,
could
result in minor to moderate injury or
product and property damage.
NOTICE
is used to address
practices not related to physical injury.
NOTE
is used to
highlight suggestions which
will
result in enhanced
installation, reliability, or operation.
Summary of Contents for 50TC*17 Series
Page 39: ...39 C10818 Fig 44 RTU OPEN Control Module...
Page 69: ...69 APPENDIX IV WIRING DIAGRAMS C150370 Fig 58 50TC D30 Control Diagram 208 230 3 60...
Page 70: ...70 APPENDIX IV WIRING DIAGRAMS 5 C150368 Fig 59 50TC D30 Control Diagram 460 575 3 60...
Page 71: ...71 APPENDIX IV WIRING DIAGRAMS C150373 Fig 60 50TC D17 D30 Power Diagram 208 230 3 60...
Page 72: ...72 APPENDIX IV WIRING DIAGRAMS C12399 Fig 61 50TC D17 D30 Power Diagram 460 575 3 60...
Page 77: ...77 APPENDIX IV WIRING DIAGRAMS C12690 Fig 66 50TC PremierLinkt System Control Wiring Diagram...
Page 78: ...78 APPENDIX IV WIRING DIAGRAMS C12691 Fig 67 50TC RTU OPEN Wiring Diagram...
Page 79: ...79 APPENDIX IV WIRING DIAGRAMS C12689A Fig 68 50TC SAV VFD System Control Wiring Diagram...