Safety Considerations; General Information - Carrier 25VNA Service Manual

SAFETY CONSIDERATIONS

Installation, service, and repair of these units should be attempted
only by trained service technicians familiar with standard service
instruction and training material.
All equipment should be installed in accordance with accepted
practices and unit Installation Instructions, and in compliance with
all national and local codes. Power should be turned off when
servicing or repairing electrical components. Extreme caution
should be observed when troubleshooting electrical components
with power on. Observe all warning notices posted on equipment
and in instructions or manuals.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.
WARNING
!
ELECTRICAL HAZARD - - HIGH VOLTAGE!
Failure to follow this warning could result in personal injury
or death.
Electrical components may hold charge. DO NOT remove
control box cover for 2 minutes after power has been
removed from unit.
PRIOR TO TOUCHING ELECTRICAL COMPONENTS:
Verify less than 20 vdc voltage at inverter connections shown
on inverter cover.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts.
WARNING
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal
injury or equipment damage.
Puronr (R- -410A) systems operate at higher pressures than
standard R- -22 systems. Do not use R- -22 service equipment
or components on Puronr equipment. Ensure service
equipment is rated for Puronr.
Refrigeration systems contain refrigerant under pressure. Extreme
caution should be observed when handling refrigerants. Wear
safety glasses and gloves to prevent personal injury. During normal
system operations, some components are hot and can cause burns.
Rotating fan blades can cause personal injury. Appropriate safety
considerations are posted throughout this manual where potentially
dangerous techniques are addressed.
If you do not understand any of the warnings, contact your
product distributor for better interpretation of the warnings.

GENERAL INFORMATION

The 25VNA Greenspeed Intelligence heat pump features a new
outdoor cabinet design that uses a four sided coil design to
minimize the unit foot print and provide the best heat exchange
taking full advantage of the latest variable speed technology. The
heart of the system is the Copeland variable speed compressor
powered through the use of the Emerson variable speed drive
(VSD) inverter control. Through the use of Puron refrigerant ,ECM
outdoor fan, Emerson VSD and Copeland variable speed
compressor along with the new outdoor cabinet the unit achieves a
Seasonal Energy Efficiency Ratio (SEER) up to 20.5 and up to 13
Heating Seasonal Performance Factor (HSPF).
To ensure all of the above technology provides the ultimate in
comfort it is combined with either the FE fan coil or Variable
Speed Gas furnace controlled with a two wire communication
Infinity User Interface (SYSTXCCUID01- -V) or the Infinity Zone
User Interface (SYSTXCCUIZ01- -V). Ensuring achievement of
comfort with the consciences of finger tip trouble shooting and
diagnostic capability.
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