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551A operation manual
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Contents
Main
Page
installation, start-up and service instructions
SINGLE PACKAGE ROOFTOP ELECTRIC COOLING/ELECTRIC HEATING UNITS
551A
Sizes 155-240
DuraPac Plus Series
Fig. 1 Roof Curb Details
Fig. 2 Horizontal Supply Roof Curb and Horizontal Adapter Roof Curb
CAUTION: All panels must be in place when rigging.
Fig. 3 Rigging Details
Fig. 4 Base Unit Dimensions, 551A155 and 180
Fig. 5 Base Unit Dimensions, 551A240
Table 1 Physical Data
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Table 2 Electrical Data
(See Legend on page 10.)
Table 3 Electric Resistance Heater Data
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injury by keeping fingers away from damper blades.
and electrical components, use recommended screw sizes only. Use care when drilling holes.
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Table 9 Fan Performance 551A155 (With Standard Indoor Fan Motor)
Table 10 Fan Performance 551A155 (With Optional Indoor Fan Motor)
Table 11 Fan Performance 551A180
Table 12 Fan Performance 551A240
Table 13 Accessory/FIOP Static Pressure (in. wg)
Fig. 29 Perfect Humidity Operation Diagram
Table 14 Perfect Humidity Dehumidification Package Static Pressure Drop (in. wg)
Table 15 Fan RPM at Motor Pulley Settings*
Table 16 Evaporator Fan Motor Specifications
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Table 19 EconoMi$er Troubleshooting
Table 20 Perfect Humidity Dehumidification Subcooler Service Analysis
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START-UP CHECKLIST
I. PRE-START-UP:
II. START-UP: