48HC*04–14
Nominal 3 to 12.5 Tons
With Puron
(R410A) Refrigerant
Service and Maintenance Instructions
TABLE OF CONTENTS
SAFETY CONSIDERATIONS
1
. . . . . . . . . . . . . . . . . . . .
UNIT ARRANGEMENT AND ACCESS
3
. . . . . . . . . . .
RETURN AIR FILTERS
4
. . . . . . . . . . . . . . . . . . . . . . . . .
SUPPLY FAN (BLOWER) SECTION
4
. . . . . . . . . . . . . .
STAGED AIR VOLUME CONTROL --2 SPEED FAN
WITH VARIABLE FREQUENCY DRIVE (VFD)
8
. . . .
ADDITIONAL VARIABLE FREQUENCY DRIVE
(VFD) INSTALLATION AND TROUBLESHOOTING. 9
MOTOR
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COOLING
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THERMOSTATIC EXPANSION VALVE (TXV)
15
. . . .
PURON
R
(R--410A) REFRIGERANT
16
. . . . . . . . . . . . .
COOLING CHARGING CHARTS
18
. . . . . . . . . . . . . . . .
COMPRESSOR
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONVENIENCE OUTLETS
25
. . . . . . . . . . . . . . . . . . . .
SMOKE DETECTORS
26
. . . . . . . . . . . . . . . . . . . . . . . . .
SENSOR AND CONTROLLER TESTS
30
. . . . . . . . . . .
PROTECTIVE DEVICES
33
. . . . . . . . . . . . . . . . . . . . . . .
GAS HEATING SYSTEM
34
. . . . . . . . . . . . . . . . . . . . . .
PREMIERLINK
CONTROL
49
. . . . . . . . . . . . . . . . . . .
RTU--OPEN CONTROL SYSTEM
49
. . . . . . . . . . . . . . . .
SENSORY/ACCESSORY INSTALLATION
49
. . . . . . . .
ADDITIONAL RTU--OPEN INSTALLATION AND
TROUBLESHOOTING
50
. . . . . . . . . . . . . . . . . . . . . . . . .
ECONOMIZER UNITS
52
. . . . . . . . . . . . . . . . . . . . . . . .
PRE--START--UP/START--UP
61
. . . . . . . . . . . . . . . . . . . .
START--UP, GENERAL
61
. . . . . . . . . . . . . . . . . . . . . . . .
START--UP, PREMIERLINK
CONTROLS
63
. . . . . . .
START--UP, RTU--OPEN CONTROLS
64
. . . . . . . . . . . .
FASTENER TORQUE VALUES
64
. . . . . . . . . . . . . . . . .
APPENDIX I. MODEL NUMBER SIGNIFICANCE
65
.
APPENDIX II. PHYSICAL DATA
66
. . . . . . . . . . . . . . . .
APPENDIX III. FAN PERFORMANCE
71
. . . . . . . . . . .
APPENDIX IV WIRING DIAGRAMS
89
. . . . . . . . . . . .
APPENDIX V. MOTORMASTER SENSOR
LOCATIONS
126
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNIT START-UP CHECKLIST
129
. . . . . . . . . . . . . . . . .
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. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have
fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. 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
indicates 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 48HC*04-14
Page 94: ...94 APPENDIX IV WIRING DIAGRAMS C14007 Fig 80 48HC A04 A06 YAC Power Diagram 230 1 60 48HC ...
Page 96: ...96 APPENDIX IV WIRING DIAGRAMS C14013 Fig 82 48HC A04 A06 YAC Power Diagram 575 3 60 48HC ...
Page 97: ...97 APPENDIX IV WIRING DIAGRAMS C14018 48HC ...
Page 98: ...98 APPENDIX IV WIRING DIAGRAMS C14019 48HC ...
Page 99: ...99 APPENDIX IV WIRING DIAGRAMS C13484 Fig 83 48HC D08 D09 YAC Power Diagram 230 460 3 60 48HC ...
Page 100: ...100 APPENDIX IV WIRING DIAGRAMS C14024 Fig 84 48HC D08 D09 YAC Power Diagram 575 3 60 48HC ...
Page 101: ...101 APPENDIX IV WIRING DIAGRAMS C14027 Fig 85 48HC D12 YAC Power Diagram 230 460 3 60 48HC ...
Page 102: ...102 APPENDIX IV WIRING DIAGRAMS C14029 Fig 86 48HC D12 YAC Power Diagram 575 3 60 48HC ...
Page 104: ...104 APPENDIX IV WIRING DIAGRAMS C14032 Fig 88 48HC D14 YAC Power Diagram 230 460 3 60 48HC ...
Page 105: ...105 APPENDIX IV WIRING DIAGRAMS C12462 Fig 89 48HC D14 YAC Power Diagram 575 3 60 48HC ...
Page 123: ...123 APPENDIX IV WIRING DIAGRAMS C12690 Fig 107 PremierLink System Control Wiring Diagram 48HC ...
Page 125: ...125 APPENDIX IV WIRING DIAGRAMS C14034 Fig 109 RTU Open Wiring Diagram 48HC ...
