2
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. consult local
building codes, the current editions of the National Fuel Gas Code
(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code
(NEC) NFPA 70.
In Canada refer to the current editions of the National Standards of
Canada CAN/CSA--B149.1 and .2 Natural Gas and Propane
Installation codes, and Canadian Electrical Code CSA C22.1
Recognize safety information. This is the safety--alert symbol
.
When you see this symbol on the unit and in instructions or manu-
als, be alert to the potential for personal injury. Understand these
signal words: DANGER, WARNING, and CAUTION. 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 per-
sonal injury or death. CAUTION is used to identify unsafe practic-
es which
may
result in minor personal injury or product and prop-
erty damage. NOTE is used to highlight suggestions which
will
result in enhanced installation, reliability, or operation.
Always install furnace to operate within the intended temperature
rise range with a duct system which has an external static pressure
within the allowable range, as specified in “Indoor Airflow Adjust-
ments” section of these instructions. See furnace rating plate.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, always turn off main
power to system and tag disconnect switch with a suitable
warning label. There may be more than one disconnect
switch. Turn off accessory heater power switch if
applicable.
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal
injury or equipment damage.
Puron (R--410A) systems operate at higher pressures than
standard R--22 systems. DO NOT use R--22 service
equipment or components on Puron (R--410A) equipment.
Ensure service equipment is rated for Puron (R--410A).
WARNING
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
When removing access panels or performing maintenance
functions inside your unit, be aware of sharp sheet metal
parts and screws. Although special care is taken to reduce
sharp edges to a minimum, be extremely careful when
handling parts or reaching into the unit.
CAUTION
!
INTRODUCTION
The 48XT--A packaged HYBRID HEAT
R
unit is a fully
self--contained combination Category I gas heating/electric heat
pump designed for outdoor installation (See Fig. 1). Standard units
are shipped in a horizontal--discharge configuration for installation
on a rooftop, or on a cement slab (see Fig. 4 for roof curb
dimensions). Standard units can be converted to downflow
(vertical) discharge configurations for rooftop applications.
Models with an N in the fifth position of the model number are
dedicated Low NOx units designed for California installations.
These models meet the California maximum oxides of nitrogen
(NOx) emissions requirements of 40 nanograms/joule or less as
shipped from the factory and must be installed in California Air
Quality Management Districts or any other regions in North
America where a Low NOx rule exists.
NOTE
:
Low NOx requirements apply only to natural gas
installations.
RECEIVING AND INSTALLATION
Check Equipment
IDENTIFY UNIT
The unit model number and serial number are printed on the unit
informative plate. Check this information against shipping papers.
INSPECT SHIPMENT
Inspect for shipping damage before removing packaging material.
If unit appears to be damaged or is torn loose from its anchorage,
have it examined by transportation inspectors before removal.
Forward claim papers directly to transportation company.
Manufacturer is not responsible for any damage incurred in transit.
Check all items against shipping list. Immediately notify the
nearest Carrier office if any item is missing. To prevent loss or
damage, leave all parts in original packages until installation.
Provide Unit Support
For hurricane tie downs, contact distributor for details and PE
(Professional Engineering) Certificate, if required.
ROOF CURB
Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 4). Install insulation, cant strips, roofing, and
flashing. Ductwork must be attached to curb.
IMPORTANT
: The gasketing of the unit to the roof curb is
critical for a water tight seal. Install gasketing material supplied
with the roof curb. Improperly applied gasketing also can result in
air leaks and poor unit performance.
Curb should be level to within 1/4 in. (6.35 mm) (See Fig. 2). This
is necessary for unit drain to function properly. Refer to accessory
roof curb installation instructions for additional information as
required.
A
B
C
MAXIMUM ALLOWABLE
DIFFERENCE in. (mm)
A-C
1/4
1/4
1/4
(6.35)
(6.35)
(6.35)
A-B
B-C
A07925
Fig. 2 -- Unit Leveling Tolerances
48X
T
--
A
Summary of Contents for INFINITIR 15 SEER 48XT-A
Page 5: ...5 A09150 Fig 5 48XT A24 30 Unit Dimensions 48XT A...
Page 6: ...6 A09151 Fig 6 48XT A36 60 Unit Dimensions 48XT A...
Page 18: ...18 A09080 Fig 17 Wiring Schematic 48XT A Single Phase Gas Inputs 040 060 090 kBtu hr 48XT A...
Page 19: ...19 A09081 Fig 18 Wiring Schematic 48XT A Single Phase Gas Inputs 115 130 kBtu hr 48XT A...
