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MODEL NUMBER NOMENCLATURE — 551A
ARI* CAPACITY RATINGS
LEGEND
*Air Conditioning and Refrigeration Institute.
NOTES:
1. Rated in accordance with ARI Standards 360-89 and 270-89.
2. ARI ratings are net values, reflecting the effects of circulating fan heat.
3. Ratings are based on:
Cooling Standard:
80 F db, 67 F wb indoor entering-air temperature and
95 F db air entering outdoor unit.
IPLV Standard:
80 F db, 67 F wb indoor entering-air temperature and 80 F
db outdoor entering-air temperature.
4. All 551A155,180 units are in compliance with ASHRAE 90.1-1999 Energy
Standard for minimum SEER and EER requirements. Refer to state and
local codes or visit the following website: http://solstice.crest.org/efficiency/
bcap to determine if compliance with this standard pertains to a given geo-
graphical area of the United States.
California, Maryland, Washington, Wyoming, Massachusetts and various
local and state building codes adopted the ASHRAE 90.1-99 efficiency
standard on October 29, 2001.
COOLING OPERATION AIR QUANTITY LIMITS
OUTDOOR AIR LOW TEMPERATURE OPERATING LIMITS
UNIT
551A
NOMINAL
TONS
STANDARD
CFM
NET COOLING
CAPACITY
(Btuh)
TOTAL
WATTS
EER
SOUND
RATING
(Bels)
IPLV
155
13 3600 134,000 12,128 10.70 8.8 11.6
180
15 5300 180,000 16,828 10.80 8.8 11.7
Bels —
Sound Levels (1 bel = 10 decibels)
db —
Dry Bulb
EER —
Energy Efficiency Ratio
IPLV —
Integrated Part-Load Values
wb —
Wet Bulb
UNIT 551A MINIMUM CFM MAXIMUM CFM
155
3600 6,250
180
4500 7,500
UNIT SIZE
551A
TEMPERATURE LIMIT (F)
Standard
Unit
Unit With
Low Ambient Kit
Unit With
Motormaster® Control
155, 180
40 20 –20
551A E X 155 000 AJ C B
Nominal Tons
155 – 13
180 – 15
551A – High Efficiency Rooftop Units
Electric Cooling
Voltage Designation
E – 460-3-60
P – 208/230-3-60
Electric Heaters
000 – No factory-installed electric heaters
Accessory field-installed electric heaters
available
X – No Heat Installed
Fan Drive Position
(Standard Motor)
B – Standard Low-Medium
Fan Drive Static Capability
D – Alternate High Fan Drive
Static Capability
Factory-Installed Outdoor Air
Upgrade Options
C – EconoMi$er
H – 25% Manual Damper
Design Series Code
AJ – EconoMi$er
Design Change
NOTE:
The example model number 551AEX155000AJCB designates a high efficiency rooftop unit, equipped with Dual Copeland
scroll compressors, 460-3-60 voltage, no heat, 12 tons cooling, EconoMi$er and the standard 2.9 bhp motor low-medium fan drive static
capability.
0TFQ004-012
551A155-180