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PHYSICAL DATA (cont)
LEGEND
*Single phase/three phase.
†Indicates automatic reset.
**581B 072 unit size 036-072 (72,000 Btu heat input) have 2 burners.
581B 115 unit size 036-072 (115,000 Btu heat input) have 3 burners.
581B 150 unit size 048-072 (150,000 Btu heat input) have 3 burners.
††An LP kit is available as an accessory.
llCalifornia compliant three-phase models.
***Three-phase standard models have heating inputs as shown. Single-
phase standard models have one-stage heating with heating input values
as follows:
581BJV036-060072, 72,000 Btuh
581BJV036-060115, 115,000 Btuh
581BJV048-060150, 150,000 Btuh
†††California SCAQMD compliant Low NO
x
models have combustion prod-
ucts that are controlled to 40 nanograms per joule or less.
UNIT SIZE 581B 036 048 060 072
FURNACE SECTION
Rollout Switch Cutout Temp (F)†
195 195 195 195
Burner Orifice Diameter (in. ...drill size)**
Natural Gas — Std 071/072
.113...33 .113...33 .113...33 .113...33
114/115
.113...33 .113...33 .113...33 .113...33
149/150
— .129...30 .129...30 .129...30
060N
.102...38 .102...38 .102...38 —
090N
.102...38 .102...38 .102...38 —
120N
— .116...32 .116...32 —
Liquid Propane — Alt†† 071/072
.089...43 .089...43 .089...43 .089...43
114/115
.089...43 .089...43 .089...43 .089...43
149/150
— .102...38 .102...38 .102...38
060N
.082...45 .082...45 .082...45 —
090N
.082...45 .082...45 .082...45 —
120N
— .094...42 .094...42 —
Thermostat Heat Anticipator Setting (amps)
(208/230/460/575 V)
.14 .14 .14 .14
Gas Input (Btuh)
First Stage/Second Stage 071II
—/ 72,000 —/ 72,000 —/ 72,000 —
114II
—/115,000 —/115,000 —/115,000 —
149II
——/150,000 —/150,000 —
072***
50,000/ 72,000 50,000/ 72,000 50,000/ 72,000 50,000/ 72,000
115***
82,000/115,000 82,000/115,000 82,000/115,000 82,000/115,000
150***
— 120,000/150,000 120,000/150,000 120,000/150,000
060N†††
—/ 60,000 —/ 60,000 —/ 60,000 —
090N†††
—/ 90,000 —/ 90,000 —/ 90,000 —
120N†††
——/120,000 —/120,000 —
Efficiency (Thermal) (%) 071
82 82 82 —
114
80 81 81 —
149
— 80 80 —
072
82 82 82 82
115
80 81 81 81
150
— 80 80 80
060N
81 81 81 —
090N
81 81 81 —
120N
— 82 82 —
Temperature Rise Range 071
15-45 15-45 15-45 —
114
55-85 35-65 35-65 —
149
— 50-80 50-80 —
072
15-45 15-45 15-45 15-45
115
55-85 35-65 35-65 35-65
150
— 50-80 50-80 50-80
060N
20-50 20-50 20-50 —
090N
30-60 30-60 30-60 —
120N
— 40-70 40-70 —
Manifold Pressure (in. wg)
Natural Gas — Std
3.5 3.5 3.5 3.5
Liquid Propane — Alt††
3.5 3.5 3.5 3.5
Maximum Static Pressure (in. wg)
1.0 1.0 1.0 1.0
Field Gas Connection Size (in.)
1
/
2
1
/
2
1
/
2
1
/
2
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief
450 ± 50
Cutout
428
Reset (Auto.)
320
LOSS-OF-CHARGE SWITCH/LOW-PRESSURE SWITCH
(Liquid Line) (psig)
Cutout
7 ± 3
Reset (Auto.)
22 ± 5
FREEZE PROTECTION THERMOSTAT
Opens (F)
30 ± 5
Closes (F)
45 ± 5
OUTDOOR-AIR INLET SCREENS
Cleanable
Quantity...Size (in.)
1...20 x 24 x 1
RETURN-AIR FILTERS
Throwaway
Quantity...Size (in.)
2...16 x 25 x 2
Bhp—
Brake Horsepower