Carrier 48SS Manuel D’Utilisation
Energy-saving, direct-spark igni-
tion saves gas by operating only
when the room thermostat calls for
heating. Standard units are furnished
with natural gas controls. A low-
cost, field-installed kit for propane
conversion is available for all units.
Monoport inshot burners produce
precise air-to-gas mixture which
provides for clean and efficient com-
bustion. The large monoport on
the inshot (or injection type) burners
seldom, if ever, needs cleaning. All
gas furnace components are accessible
in one compartment.
The 48SS units meet California
Air Quality Management NO
tion saves gas by operating only
when the room thermostat calls for
heating. Standard units are furnished
with natural gas controls. A low-
cost, field-installed kit for propane
conversion is available for all units.
Monoport inshot burners produce
precise air-to-gas mixture which
provides for clean and efficient com-
bustion. The large monoport on
the inshot (or injection type) burners
seldom, if ever, needs cleaning. All
gas furnace components are accessible
in one compartment.
The 48SS units meet California
Air Quality Management NO
x
requirement of 40 nanograms/
joule or less when NO
joule or less when NO
x
kit
no. CRLOWNOX001A00 is
installed.
installed.
Durable, dependable
components
components
Top quality, top reliability compo-
nents are designed and tested for a
minimum of 15 years of operation
under the harshest conditions. Every
48SS unit is thoroughly run-tested
at the factory in each operating mode,
and is evacuated prior to final
charging.
Compressors are designed for high
efficiency. Each compressor is her-
metically sealed against contamination
to help promote longer life and de-
pendable operation. Each compressor
also has vibration isolation to pro-
vide quiet operation. All compressors
have internal high-pressure and
overcurrent protection. Rotary com-
pressors are standard on unit
size 018. Reciprocating compressors
are standard on unit sizes 024-042.
Scroll compressors are standard on
unit sizes 048 and 060.
Dimpled heat exchangers optimize
heat transfer for improved efficiency.
The tubular design permits hot gases
to stay in close contact with the cell
walls to maximize heat transfer and
efficiency.
The induced draft combustion
system eliminates the unsightly ap-
pearance of flue stacks, and diminishes
the effects of wind on heating opera-
tion. The induced draft also pre-
vents contaminants from entering the
supply air if a leak in the heat ex-
changer occurs.
nents are designed and tested for a
minimum of 15 years of operation
under the harshest conditions. Every
48SS unit is thoroughly run-tested
at the factory in each operating mode,
and is evacuated prior to final
charging.
Compressors are designed for high
efficiency. Each compressor is her-
metically sealed against contamination
to help promote longer life and de-
pendable operation. Each compressor
also has vibration isolation to pro-
vide quiet operation. All compressors
have internal high-pressure and
overcurrent protection. Rotary com-
pressors are standard on unit
size 018. Reciprocating compressors
are standard on unit sizes 024-042.
Scroll compressors are standard on
unit sizes 048 and 060.
Dimpled heat exchangers optimize
heat transfer for improved efficiency.
The tubular design permits hot gases
to stay in close contact with the cell
walls to maximize heat transfer and
efficiency.
The induced draft combustion
system eliminates the unsightly ap-
pearance of flue stacks, and diminishes
the effects of wind on heating opera-
tion. The induced draft also pre-
vents contaminants from entering the
supply air if a leak in the heat ex-
changer occurs.
Direct-drive multispeed, PSC
(permanent split capacitor)
blower motor is standard on all
models.
Direct-drive, PSC condenser-fan
motor is designed to help reduce
energy consumption and provide for
cooling operation down to 40 F
outdoor temperature.
Refrigerant system is designed to
provide dependability. Liquid refriger-
ant strainers are used to promote
clean, unrestricted operation. Each
unit leaves the factory with a full refrig-
erant charge. Refrigerant service
connections make checking operating
pressures easier.
Color-coded wires permit easy trac-
ing and diagnostics.
Evaporator and condenser coils
are computer-designed for optimum
heat transfer and cooling efficiency.
Condenser coil is fabricated of copper
tube and aluminum fins and is lo-
cated inside the unit for protection
against damage for long life and reli-
able operation. The condenser coil
is internally mounted and protected by
a composite grille. Copper fin coils
are also available from the factory by
special order. These coils are rec-
ommended in applications where alu-
minum fins are likely to be damaged
due to corrosion and are ideal for sea-
coast applications.
Low sound ratings ensure a quiet
indoor and outdoor environment with
sound ratings as low as 7.4 bels.
Easy to service cabinets provide
easy accessibility to serviceable com-
ponents during maintenance and
installation. Rounded corners are an
important safety feature, and a high
quality finish ensures an attractive
appearance.
Optional base rails provide holes
for rigging and forklifts as well as
an elevated mounting frame that pro-
vides structural support for horizon-
tal installations. Ideal for light
commercial applications.
Downflow option unit is converted
for downflow at the factory to al-
low vertical ductwork connections.
Unit is equipped with base rail.
(permanent split capacitor)
blower motor is standard on all
models.
Direct-drive, PSC condenser-fan
motor is designed to help reduce
energy consumption and provide for
cooling operation down to 40 F
outdoor temperature.
Refrigerant system is designed to
provide dependability. Liquid refriger-
ant strainers are used to promote
clean, unrestricted operation. Each
unit leaves the factory with a full refrig-
erant charge. Refrigerant service
connections make checking operating
pressures easier.
Color-coded wires permit easy trac-
ing and diagnostics.
Evaporator and condenser coils
are computer-designed for optimum
heat transfer and cooling efficiency.
Condenser coil is fabricated of copper
tube and aluminum fins and is lo-
cated inside the unit for protection
against damage for long life and reli-
able operation. The condenser coil
is internally mounted and protected by
a composite grille. Copper fin coils
are also available from the factory by
special order. These coils are rec-
ommended in applications where alu-
minum fins are likely to be damaged
due to corrosion and are ideal for sea-
coast applications.
Low sound ratings ensure a quiet
indoor and outdoor environment with
sound ratings as low as 7.4 bels.
Easy to service cabinets provide
easy accessibility to serviceable com-
ponents during maintenance and
installation. Rounded corners are an
important safety feature, and a high
quality finish ensures an attractive
appearance.
Optional base rails provide holes
for rigging and forklifts as well as
an elevated mounting frame that pro-
vides structural support for horizon-
tal installations. Ideal for light
commercial applications.
Downflow option unit is converted
for downflow at the factory to al-
low vertical ductwork connections.
Unit is equipped with base rail.
Low and high voltage electrical
entries allow low and high voltage to
be brought in through either the
front duct panel or rear flue panel.
Integrated gas unit controller
(IGC) contains all the ignition compo-
nents and is easily accessible for ser-
vice. The IGC provides built-in
diagnostic capabilities. A light-emitting
diode (LED) simplifies troubleshoot-
ing by providing visual fault notifi-
cation and system status information.
The IGC board provides exclusive
anti-cycle protection for gas heat
operation. The IGC also contains
burner control logic for dependable
heating operation. The 48SS units
maximize heating efficiency through
the IGC’s control of evaporator fan
ON/OFF delays. The IGC helps make
48SS units reliable for years.
Weatherized cabinets are con-
structed of heavy-duty, phosphated,
zinc-coated prepainted steel capable
of withstanding 500 hours (Federal
Test Method Standard No. 141,
Method 6061) in salt spray. Interior
surfaces of the evaporator/heat
exchanger compartment are insulated
with cleanable, foil-faced insulation
for improved indoor-air quality. Unit
conforms to American Society of
Heating, Refrigeration and Air Condi-
tioning Engineers [ASHRAE]
No. 62, with use of a sloped conden-
sate pan. An external drain trap is
required.
The standard control system is
readily adaptable to all conventional
and programmable thermostats. In
addition, units are suitable for integra-
tion into monitor control systems if
required.
Standardized components for the
complete 48SS line of products are
found in all safety devices, condenser-
fan motors, evaporator-fan motors,
and control boards, while the gas sec-
tions use common inducer motors,
limit switches, and rollout switches.
This allows for greater inventory con-
trol, familiarity of parts, and fewer
stocked parts.
entries allow low and high voltage to
be brought in through either the
front duct panel or rear flue panel.
Integrated gas unit controller
(IGC) contains all the ignition compo-
nents and is easily accessible for ser-
vice. The IGC provides built-in
diagnostic capabilities. A light-emitting
diode (LED) simplifies troubleshoot-
ing by providing visual fault notifi-
cation and system status information.
The IGC board provides exclusive
anti-cycle protection for gas heat
operation. The IGC also contains
burner control logic for dependable
heating operation. The 48SS units
maximize heating efficiency through
the IGC’s control of evaporator fan
ON/OFF delays. The IGC helps make
48SS units reliable for years.
Weatherized cabinets are con-
structed of heavy-duty, phosphated,
zinc-coated prepainted steel capable
of withstanding 500 hours (Federal
Test Method Standard No. 141,
Method 6061) in salt spray. Interior
surfaces of the evaporator/heat
exchanger compartment are insulated
with cleanable, foil-faced insulation
for improved indoor-air quality. Unit
conforms to American Society of
Heating, Refrigeration and Air Condi-
tioning Engineers [ASHRAE]
No. 62, with use of a sloped conden-
sate pan. An external drain trap is
required.
The standard control system is
readily adaptable to all conventional
and programmable thermostats. In
addition, units are suitable for integra-
tion into monitor control systems if
required.
Standardized components for the
complete 48SS line of products are
found in all safety devices, condenser-
fan motors, evaporator-fan motors,
and control boards, while the gas sec-
tions use common inducer motors,
limit switches, and rollout switches.
This allows for greater inventory con-
trol, familiarity of parts, and fewer
stocked parts.
2