2
Variable Frequency Drive (VFD) . . . . . . . . . . . . . . . . 73
48/50LC 07-26 Variable Frequency Drive (Danfoss
VFD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Carrier Comfort Network® (CCN) Interface . . . . . . . 87
APPENDIX A — SYSTEMVU™ CONTROLLER
DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
APPENDIX B — SYSTEMVU CONTROLLER TEXT
POINT REFERENCE . . . . . . . . . . . . . . . . . . . . . . . 116
APPENDIX C — NAVIGATOR™ DISPLAY . . . . . . . 117
APPENDIX D — SYSTEMVU CONTROLLER CCN
TABLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
APPENDIX E — BACNETS POINT LIST . . . . . . . . . 160
CONTROL SETPOINT AND CONFIGURATION
LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
UNIT START-UP CHECKLIST . . . . . . . . . . . . . . . . CL-1
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 basic maintenance functions
of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
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, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.
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.
GENERAL
This publication contains start-up, controls, operation, service,
and troubleshooting information for the 48/50LC rooftop units
equipped with the factory-installed optional SystemVu™ con-
trols (version 3.X or higher) and use Puron
®
(R-410A) refriger-
ant. See Fig. 1 for the SystemVu controls. The specific base
unit installation instructions, service manual and/or wiring la-
bel diagram may also be required in conjunction with this book
as a guide to a specific unit on the roof. All units in Table 1 are
Staged Air Volume (SAV™) units that allow for stand-alone or
network operation.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury
or death.
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lock(s)
and lockout tag(s). Ensure electrical service to rooftop unit
agrees with voltage and amperage listed on the unit rating
plate. Unit may have more than one power switch.
CAUTION
UNIT DAMAGE HAZARD
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out com-
ponents or to bypass or otherwise depart from recommend-
ed procedures. Any short-to-ground of the control board or
accompanying wiring may destroy the electronic modules
or electrical components.
WARNING
If the information in this manual is not followed exactly, a
fire or explosion may result causing property damage, per-
sonal injury or loss of life.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
AVERTISSEMENT
RISQUE D´INCENDIE OU D´EXPLOSION
Si les consignes de sécurité ne sont pas suivies à la lettre,
cela peut entraîner la mort, de graves blessures ou des dom-
mages matériels.
Ne pas entreposer ni utiliser d´essence ni autres vapeurs ou
liquides inflammables à proximité de cet appareil ou de tout
autre appareil.
QUE FAIRE SI UNE ODEUR DE GAZ EST DÉTECTÉE
• Ne mettre en marche aucun appareil.
• Ne toucher aucun interrupteur électrique; ne pas
utiliser de téléphone dans le bâtiment.
• Quitter le bâtiment immédiatement.
• Appeler immédiatement le fournisseur de gaz en
utilisant le téléphone d´un voisin. Suivre les
instructions du fournisseur de gaz.
• Si le fournisseur de gaz n´est pas accessible, appeler le
service d´incendie.
L´installation et l´entretien doivent être effectués par un in-
stallateur ou une entreprise d´entretien qualifié, ou le four-
nisseur de gaz.
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