48HC Packaged Rooftop Unit from Carrier


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48HC WEATHERMASTER®

Single-Package Rooftop
High Efficiency
Gas Heating/Electric Cooling Units
3 to 25 Nominal Tons

48HC WEATHERMASTER® rooftop unit were designed by customers for customers. With a gauge plug, centralized control center, plug & play accessory board, "no-strip screw" collars, and handled access panels, we’ve made the unit easy to install, easy to maintain, and easy to use. Units are pre-wired and pre-charged with environmentally sound Puron® (R-410A) refrigerant at the factory. The units are factory tested in both heating and cooling modes.

Performance Features

Puron® (R-410A) HFC refrigerant
ASHRAE 90.1 and Energy Star compliant
Single-stage capacity control (sizes 04 to 07)
Two-stage cooling capacity control (sizes 08 to 28)
SEERs up to 15.6
EERs up to 12.2
IEERs up to 13.0
Exclusive non-corrosive composite condensate pan in accordance with ASHRAE 62 Standard, sloping design; side or center drain
Gas efficiencies up to 82%
Induced draft combustion
Single and multi-state heating
Pre-painted exterior panels and primer-coated interior panels tested to 500 hours salt spray protection
TXV refrigerant metering device on each circuit with removable power element
Fully insulated cabinet
Enhanced copper tube and aluminum fin designed condenser and evaporator coils. Special coated coils also available
Exclusive IGC solid-state control for on-board diagnostics with LED error code designation, burner control logic and energy saving indoor fan motor delay
Dedicated 3-5 ton "Low NOx" models available that meet California Air Quality Management NOx requirement of 40 nangram/joule or ess. Low NOx models include stainless steel heat exchangers.
Standard cooling operating range up to 125 °F (52°C) and down to 35°F (-2°C). Low ambient controllers can bring cooling operation down to -20°F (-29°C)
Rated in accordance with ARI Standards 210/240 (sizes 04 to 06 ) and 340/360 (sizes 07 to 28)
Designed in accordance with Underwriters’ Laboratories Standard 1995
Listed by UL and UL, Canada, or ETL

Maintenance Features

Access panels with easy grip handles
Innovative , easy starting, no-strip screw feature on unit access panels
Two-inch disposable return air filters
Tool-less filter access door
Optional hinged access panels also available
Belt drive evaporator-fan motor and pulley combinations available on all three phase models to meet any application
Electric Drive x13 (5 speed/torque) motor on 04 to 06 models
New terminal board facilitating simple safety circuit troubleshooting and simplified control box arrangement

Installation Features

Field convertible from vertical to horizontal airflow for slab mounting (sizes 04 to 14)
Provisions for thru-the-bottom power entry capability as standard
Single point gas and electric connections
Full perimeter base rail with built-in rigging adapters and fork truck slots
Dedicated vertical and horizontal airflow models available (factory option on size 17 to 28 units)

Reliability Features

Scroll compressors with internal line-break overload protection
24-volt control circuit protected with resettable circuit breaker
Permanently lubricated evaporator-fan motor
Totally enclosed condenser motors with permanently lubricated bearings
Low pressure and high-pressure switch protection
Exclusive IGC anti-cycle protection for gas heat operation
Solid-state electronic direct spark ignition system
Flame roll-out safety protector
Liquid line filter drier as standard

Standard Limited Warranty

10 years parts only heat exchanger - aluminized
15 years parts only heat exchanger - stainless steel
5 years parts only compressor
One year parts only on all other parts
Extended warranty packages available

Options/Accessories

Category	Item	Factory Installed Option	Field Installed Accessory
Cabinet	Thru -the-base electrical or gas-line connections	Y	Y
Cabinet	Hinged access panels	Y
Coil Options	Cu/Cu indoor and/or outdoor coils	Y
	Pre-coated outdoor coils	Y
	E-coated outdoor coils	Y
Humidity Control	Humidi-MiZer Adaptive dehumidification system	Y
Condenser Protection	Condenser coil hail guard (louvered design)	Y	Y
Controls	Thermostats, temperature sensors, and subbases		Y
	PremierLink™ DDC communicating controller	Y	Y
	RTU-OPEN™ open-protocol controller	Y
	Smoke detector (supply and/or return air)	Y	Y
	Time Guard II compressor delay control circuit		Y
Economizers & Outdoor Air Dampers	EconoMi$er IV (for electro-mechanical controlled RTUs)	Y	Y
	EconoMi$er2 (for DDC controlled RTUs)	Y	Y
	Motorized 2 position outdoor-air damper	Y	Y
	Manual outdoor-air damper		Y
	Barometric relief²	Y	Y
	Power exhaust		Y
Economizer Sensors & IAQ Devices	Single dry bulb temperature sensors³	Y	Y
	Differential dry bulb temperature sensors³		Y
	Single enthalpy sensors³	Y	Y
	Differential enthalpy sensors³		Y
	CO2 sensor (wall, duct, or unit mounted)³	Y	Y
Gas Heat	Liquid propane (LP) conversion kit		Y
	Stainless steel heat exchanger	Y
	High altitude conversion kit		Y
	Flue discharge deflector	Y
Indoor Motor & Drive	Multiple motor and drive packages	Y
Low Ambient Control	Winter start kit⁴		Y
Low Ambient Control	Motormaster® head pressure controller⁴		Y
Power Options	Convenience outlet (powered)	Y
	Convenience outlet (unpowered)	Y
	Non-fused disconnect	Y
Roof Curbs	Roof curb 14â (356mm)		Y
Roof Curbs	Roof curb 24â (610mm)		Y

Refer to Product Data for further information.

Notes:

1.	Use in conjunction with specialized thermostat or controls device.
2.	Included with economizer.
3.	Sensors for optimizing economizer.
4.	See application data for assistance.