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PHYSICAL DATA — 579F180-300 (cont)
UNIT SIZE 579F
180
LOW/HIGH HEAT
216
LOW/HIGH HEAT
240
LOW/HIGH HEAT
300
LOW/HIGH HEAT
FURNACE SECTION
Rollout Switch Cutout
Temp (F)†† 190 190 190 190
Burner Orifice Diameter
(in. ...drill size)
Natural Gas 0.1405...28/0.136...29 0.1405...28/0.136...29 0.1405...28/0.136...29 0.1405...28/0.136...29
Thermostat Heat Anticipator Setting (amps)
208/230 v Stage 1 0.98 0.98 0.98 0.98
Stage 2 0.44 0.44 0.44 0.44
460 v Stage 1 0.80 0.80 0.80 0.80
Stage 2 0.44 0.44 0.44 0.44
Gas Input (Btuh) Stage 1 172,000/225,000 206,000/270,000 206,000/270,000 206,000/270,000
Stage 2 230,000/300,000 275,000/360,000 275,000/360,000 275,000/360,000
Efficiency (Steady State) (%) 81 81 81 81
Temperature Rise Range 15-45/30-60 15-45/20-50 15-45/20-50 15-45/20-50
Manifold Pressure (in. wg)
Natural Gas 3.3 3.3 3.3 3.3
Gas Valve Pressure Range
in. wg 5.5-13.5 5.5-13.5 5.5-13.5 5.5-13.5
psig 0.235-0.487 0.235-0.487 0.235-0.487 0.235-0.487
Gas Valve Quantity 1111
Field Gas Connection Size (in.)
3
⁄
4
3
⁄
4
3
⁄
4
3
⁄
4
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief
(Differential)
—
Cutout 426
Reset (Auto.) 320
LOW-PRESSURE SWITCH (psig)
Cutout 7
Reset (Auto.) 22
FREEZE PROTECTION THERMOSTAT (F)
Opens 30±5
Closes 45±5
OUTDOOR-AIR INLET SCREENS Cleanable
Quantity...Size (in.) 2...20 x 25 x 1
1...20 x 20 x 1
RETURN-AIR FILTERS Throwaway
Quantity...Size (in.) 4...20 x 20 x 2
4...16 x 20 x 2
POWER EXHAUST
1
⁄
2
Hp 208/230-460 v Motor Direct Drive, Prop-Fan (Factory-wired for 460 v)
LEGEND
Al — Aluminum
Bhp — Brake Horsepower
Cu — Copper
TXV — Thermostatic Expansion Valve
*Evaporator coil fin material/condenser coil fin material.
†Weight of 14-in. roof curb.
**On 579F180-300 units, Circuit 1 consists of lower portion of con-
denser coil and lower portion of evaporator coil, and Circuit 2 is the
upper portion of both coils.
††Rollout switch lockout is manually reset by interrupting power to unit
or resetting thermostat.
The 579F300 unit requires 2-in. industrial-grade filters capable of
handling face velocities of up to 625 ft/min (such as American Air Fil-
ter no. 5700 or equivalent).
NOTE: The 579F180-300 units have a low-pressure switch (standard)
located on the suction side.
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