Carrier: 48TM Rooftop Unit (15 to 25 Tons)

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48TM WEATHERMAKER®

Single-Package Rooftop
High-Eficiency
Gas Heating/Electric Cooling Units
15 to 25 Nominal Tons

The 48TM units are one-piece gas heating electric cooling units that are pre-wired and pre-charged with R-22 at the factory. Units are factory tested in both heating and cooling modes.

Performance Features

Each unit features two independent refrigerant circuits with a scroll compressor on each circuit. Refrigerant metering devices for each circuit are TXVs. (size 028 has three scroll compressors on two refrigerant circuits)
Two-inch, disposable-type fiberglass return air filters
Two-stage cooling
Two-stage heating
Low outdoor temperature cooling operation to 40° F is standard
Automatic changeover (when used with auto changeover thermostat)
Adjustable speed main blower drives
Liquid line filter driers
Induced draft combustion system uses manual reset roll-out switch and induced draft fan proving switch
Heating controls include a cycling ignition system with flame rectification sensor and redundant gas valve
Integrated Gas Control (IGC) Board
Alumagard™ coated Turbo-tubular™ heat exchangers
Rated in accordance with ARI Standard 360
Designed in accordance with UL Standard 1995
Listed by ETL

Maintenance Features

Single point electrical service entry
Single point gas connection

Installation Features

Manually adjustable outside air intake for up to 25% outside air
Provision for horizontal return standard on base unit

Reliability Features

Compressor protection includes high and low-pressure cutouts and overtemperature protection
Dual freezestat protection
Condenser-fan motors are internally protected. Demand-oriented control system controls integrated EconoMi$er IV (option), mechanical cooling and heating from room thermostat
Control circuit protected by circuit breaker
Cabinet made of Weather Armor pre-painted, baked enamel finish and insulated with neoprene-coated fiberglass
Spring return on power-loss EconoMi$er IV

Standard Warranty

Standard one-year product warranty
Five-year non-prorated warranty on Alumagard coated Turbo-tubular heat exchanger
Five-year warranty on the size 016 compressors
One-year warranty on the size 020 to 028 compressors

Options/Accessories

	Factory Installed Option	Field Installed Accessory
25% open two-position damper		Y
Barometric relief damper (not for use with horizontal adapter curb)		Y
Condenser coil hail guard assembly (sizes 016-025)		Y
Convenience outlet (load side)	Y
Copper fins indoor and outdoor coil	Y
Copper fins outdoor coil	Y
E-coat outdoor coil (aluminum)	Y
E-coat outdoor coil (copper)	Y
EconoMi$er IV with controller	Y	Y
EconoMi$er2 (without controller)	Y	Y
Electronic programmable thermostat		Y
Enthalpy or differential enthalpy sensor		Y
Fan/filter status		Y
High-static motor and drive	Y
Hinged access panels	Y
Horizontal adapter curb (sizes 016-025)		Y
Humidistat		Y
Indoor air quality (CO₂) sensor		Y
Light commercial Thermidistat™ device		Y
LP (liquid propane) conversion kit		Y
Manual outdoor-air damper		Y
MoistureMi$er™ dehumidification package	Y
Motormaster® I, V head pressure control (low ambient kit)		Y
Novar control	Y
Outdoor air enthalpy sensor		Y
Power exhaust without barometric relief		Y
Pre-coat aluminum fins on outdoor coil	Y
PremierLink™ DDC communicating control	Y	Y
Return air CO₂ sensor (EconoMi$er IV only)		Y
Return air enthalpy sensor		Y
Return air temperature sensor		Y
Roof curbs (vertical and horizontal discharge)		Y
Thermostats and subbases		Y
Time Guard II (compressor cycle delay) control circuit		Y
Unit-mounted non-fused disconnect	Y
Winter start time delay		Y



		All 208-230, 460-V Units	All Units

Carrier Corporation

A Member of The United Technologies Corporation Family

Stock Symbol: UTX

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