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PHYSICAL DATA — 581A210-300
LEGEND
UNIT 581A 210 240 300
NOMINAL CAPACITY (tons) 18 20 25
OPERATING WEIGHT (lb)
Al/Al 222422722526
COMPRESSOR
Quantity 332
Number of Refrigerant Circuits 332
Oil (ounces) Ckt A...Ckt B...Ckt C 68...68...90 90...90...90 110...110...NA
REFRIGERANT TYPE
Expansion Device TXV TXV TXV
Operating Charge (lb)
Circuit A 13.1 13.8 21.8
Circuit B 12.7 13.9 20.3
Circuit C 15.2 15.5 NA
CONDENSER FAN
Nominal Cfm (Total, all fans) 14,000 14,000 21,000
Quantity...Diameter (in.) 4...22 4...22 6...22
Motor Hp...Rpm
1
/
4
...1100
1
/
4
...1100
1
/
4
...1100
Watts Input (Total) 140014002100
CONDENSER COIL
Rows...Fins/in. 2...17 2...17 2...17
Total Face Area (sq ft) 57.78 57.78 66.67
EVAPORATOR FAN
Quantity...Size 2...15x11 2...15x11 2...15x11
Type Drive Belt Belt Belt
Nominal Cfm 7000 8000 10,000
Motor Bearing Type Ball Ball Ball
Maximum Allowable Fan Rpm 140014001400
EVAPORATOR COIL
Rows...Fins/in. 3...15 4...15 4...15
Total Face Area (sq ft) 23.33 23.33 27.22
FURNACE SECTION
Rollout Switch Cutout Temp (F) 225 225 225
Burner Orifice Diameter (in. ...drill size) 0.136...29 0.136...29 0.136...29
Gas Natural Natural Natural
Thermostat Heat Anticipator Setting
Stage 1 (amps) 0.98 0.98 0.98
Stage 2 (amps) 0.44 0.44 0.44
Gas Input (Btuh) HIGH HEAT Stage 1 317,000 317,000 317,000
Stage 2 400,000 400,000 400,000
Efficiency (Steady State) % Vertical 82 82 82
Temperature Rise Range 25-55 25-55 25-55
Gas Input (Btuh) MEDIUM HEAT Stage 1 281,000 281,000 281,000
Stage 2 365,000 365,000 365,000
Efficiency (Steady State) % Vertical 81 81 81
Temperature Rise Range 25-55 25-55 25-55
Gas Input (Btuh) LOW HEAT Stage 1 199,000 199,000 199,000
Stage 2 250,000 250,000 250,000
Efficiency (Steady State) % Vertical 82 82 82
Temperature Rise Range (F) 15-45 15-45 15-45
Manifold Pressure
Natural Gas (in. wg) Vertical 3.00 3.00 3.00
Natural Gas (in. wg) Horizontal 2.95 2.95 2.95
Gas Valve Quantity 111
Gas Valve Pressure Range (in. wg) 5.5-13.0 5.5-13.0 5.5-13.0
Min-Max Allowable (psig) .235-.469 .235-.469 .235-.469
Field Gas Connection Size (in. FPT)
3
/
4
3
/
4
3
/
4
HIGH-PRESSURE SWITCH (psig)
Cutout 426 426 426
Reset (Auto) 320 320 320
OUTDOOR-AIR INLET SCREENS
Quantity...Size (in.) 3...20x25 3...20x25 3...20x25
RETURN-AIR FILTERS
Quantity...Size (in.) 9...16x25 9...16x25 9...18x24
TXV — Thermostatic Expansion Valve
581A155-300