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Form No. PDS548F-36-6
COMMERCIAL
SINGLE PACKAGE ROOFTOP
STANDARD AND HIGH EFFICIENCY
HEAT PUMP UNITS
Standard-Efficiency (548F), and High-Efficiency (549B, 549C,
542J) heat pump units offer:
• Pre-painted galvanized steel cabinet for long life and quality
appearance
• Commercial strength base rails with built-in rigging capability
• Convertible design for vertical or horizontal supply/return
• Non-corrosive, sloped condensate drain pan, meets
ASHRAE 62 (IAQ)
• Two-inch return-air filters
• A wide assortment of factory-installed options available,
including high-static drives that provide additional perfor-
mance range
• Factory-installed optional gear driven EconoMi$erIV (vertical
return for sizes 024-120 only) for use with standard rooftop
unit controls (includes CO
2
sensor control capability)
• Factory-installed optional gear driven EconoMi$er2 (vertical
return only) for use with third party controls (includes 4 to
20 mA actuator for demand control ventilation)
• State-of-the-art defrost system
• Dependable 4-way valve operation
Heat Options
• Field-installed electric heat available
• Glycol hydronic coils
FEATURES/BENEFITS
Every compact one-piece unit arrives fully assembled,
charged, tested, and ready to run.
QUIET, EFFICIENT OPERATION AND DEPENDABLE PER-
FORMANCE — Compressors have vibration isolators for quiet
operation. Efficient fan and motor design permits operation at
low sound levels.
Unit sizes 090-180 offer lower utility costs through part-load
operation using 2 stages of cooling.
Quiet and efficient operation is provided by belt-driven indoor
fans (standard on all units over 5 tons). The belt-driven indoor
fan is equipped with variable-pitch pulleys which allow adjust-
ment within the rpm ranges of the factory-supplied pulleys.
Increased operating efficiency is achieved through computer-
designed coils featuring staggered internally enhanced copper
tubes. Fins are ripple-edged for strength, lanced, and double
waved for higher heat transfer.
Models 542J, 548F, 549B, 549C
Sizes 024-180
DuraPac and DuraPac Plus
2 to 15 Tons
548F036-072
549B036-072
549C024-060
548F090-120
549B090-120
542J150,180
50-1219
50-1304
50-1214