Specifications

4
FEATURES/BENEFITS (cont)
INDOOR AIR QUALITY (IAQ)
The Quality of Building Air is Improved
as the DuraPac Plus
series utilizes certain key features that assist in improving
indoor air quality. A sloped condensate pan eliminates possible
biological growth in the rooftop unit. A face-split evaporator coil
(090-150 sizes) design proves effective in removing additional
moisture from the supply air. Two-in. filters are standard in all
rooftop units and an optional filter status sensor is available.
SERVICEABILITY
Standardized Components
for the complete DuraPac Plus
line of products are found in all safety devices, condenser-fan
motors, evaporator-fan motors, and control boards, while the
gas sections use common inducer motors, limit switches, and
rollout switches. This allows for greater inventory control, famil-
iarity of parts, and fewer stocked parts.
Easily Accessible Refrigerant Access Ports
on all discharge,
suction, and liquid lines permit easy and accurate measure-
ments as well as simple accessibility.
Resettable 24-v Circuit Breaker On 581B090-150 Units
allows room for error without replacing transformers or fuses.
Single-Side Utility Connections
provide easy access to per-
form any necessary service.
Color-Coded Wires
permit easy tracing and diagnostics.
Belt-Driven Motors
are accessible through a single access
door to facilitate servicing and adjusting after installation.
Compressors and Safety Switches are Easily Accessible
for
troubleshooting and system analysis.
MODEL NUMBER NOMENCLATURE
581B – Single Package
High-Efficiency
Gas/Electric Unit
Voltage Designation
E – 460-3-60
J – 208/230-1-60
P – 208/230-3-60
T – 575-3-60
581B E V 090 180 N AA
Fuel and Control Type
V – Natural Gas/Direct
Spark Ignition
Factory-Installed Options*
Nominal Tons
036 – 3 090 – 7-1/2
048 – 4 102 – 8-1/2
060 – 5 120 – 10
072 – 6 150 – 12-1/2
N – Low NOx Units
Gas Heat Input (Btuh)
072 – 72,000 180 – 180,000
115 – 115,000 220 – 224,000
125 – 125,000 250 – 250,000
150 – 150,000
Low NOx* California Compliant 3 Phase
060N – 60,000 071 – 72,000
090N – 90,000 114 – 115,000
120N – 120,000 149 – 150,000
*Refer to the Trade Prices for ordering codes of factory-installed options.