48HJD/HJE/HJF Single-Package Rooftop Units High-Efficiency
Electric Cooling/ Gas Heating (3 - 12.5 TONS)
Carrier has designed the new Weathermaster series based on
customer needs and requests to be the most efficient and reliable
ever.
Features/Benefits
- Most efficient rooftop line for cooling using scroll
compressor technology*
- Most efficient rooftop line for heating using dimpled
heat exchangers with 2-stage gas valves on all units*
- Highest reliability* -- non-corrosive condensate pans,
prepainted cabinets and primed interior panels, and all
units are fully protected by internal safeties
- Quietest operation* -- isolated compressor rails. All
compressors mounted on independent vibration isolators.
Standard, belt-driven evaporator fan motors on all units
- Unprecedented ease of maintenance achieved by self
diagnostics on the Integrated Gas Unit Controller (IGC),
optional direct digital controls, standard size filters,
no tool filter access, simple compressor access,
permanently lubricated fan motors, optional disconnect
switch, optional 115-v convenience outlet, and optional
hinged access panels
- Exclusive MoistureMiser dehumidification package --a
result of recent advances by Carrier in controlling
comfort levels. This factory-installed option
significantly improves the dehumidification capability of
the rooftop unit and helps control humidity levels in the
building.
- Carrier means Top Quality and Reliability: Each component
utilized in the Weathermaster Series is designed and
tested for a minimum of 15 years operation under the
harshest conditions. Every unit is thoroughly run tested
at the factory in each operating mode and evacuated prior
to final charging. Every coil is leak tested with helium
particles. Automated run testing allows accurate,
undisputed tests and measurements which are second to
none in the industry. Each unit contains a factory
printout indicating tested pressures, amperages, dates,
and inspectors, providing certification of the unit's
status at the time of manufacture. Units are equipped
with valuable safety controls designed to monitor and
protect for the life of the unit.
- The standard safeties include:
- Low-pressure/loss-of-charge switch
- High-pressure switch
- Freeze-protection thermostat
- Internal compressor overload
- Exclusive Carrier Cycle-LOC&tm circuit board that
provides anti- compressor cycling
- Refrigerant filter drier
- The cabinet is constructed of galvanized steel,
bonderized, and coated with a prepainted baked enamel
finish. The paint finish is a non-chalking type, and is
capable of withstanding Federal test Method Standard No.
141 (Method 6061) 500-hour salt spray test. In addition,
all internal cabinet panels are primed, allowing the
entire unit to have longer life and a more attractive
appearance.