90
PHYSICAL DATA — 581B090-150 (cont)
LEGEND
*Single phase/three phase.
†Indicates automatic reset.
**180,000 Btuh heat input units have 2 burners.
224,000 Btuh heat input units and 250,000 Btuh Heat input units have
3 burners.
††An LP kit is available as an accessory.
UNIT SIZE 581B 090 102 120 150
FURNACE SECTION
Rollout Switch Cutout Temp (F)† 195 195 195 195
Burner Orifice Diameter (in. ...drill size)**
Natural Gas — Std 125 .120...31 125 .120...31 180 .120...31 180 .120...31
180 .120...31 180 .120...31 224 .120...31 224 .129...30
224 .120...31 224 .120...31 250 .129...30 — —
Liquid Propane — Alt††
125
.096...41
125
.096...41
180
.096...41
180
.096...41
180 .096...41 180 .096...41 224 .096...41 224 .102...38
224 .096...41 224 .096...41 250 .102...38 — —
Thermostat Heat Anticipator Setting (amps)
Stage 1 .14 .14 .14 .14
.14 .14 .14 .14
.14 .14 .14
Stage 2 .14 .14 .20 .20
.20 .20 .20 .20
.20 .20 .20
Gas Input (Btuh) Stage 1
125
90,000
125
90,000
180
120,000
180
120,000
180 120,000 180 120,000 224 180,000 224 180,000
224 180,000 224 180,000 250 200,000 — —
Stage 2
125
125,000
125
125,000
180
180,000
180
180,000
180 180,000 180 180,000 224 224,000 224 224,000
224 224,000 224 224,000 250
250,000 — —
Efficiency (Steady State) (%) 82 82 82 82
82 82 82 80
82 82 80
Temperature Rise Range
125
20-50
125
20-50
180
35-65
180
35-65
180 35-65 180 35-65 224 35-65 224 40-70
224 45-75 224 45-75 250 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
Gas Valve Quantity 1111
Gas Valve Pressure Range (Min-Max Allowable)
Psig 0.180-0.470 0.180-0.470 0.180-0.470 0.180-0.470
in. wg 5.0-13.0 5.0-13.0 5.0-13.0 5.0-13.0
Field Gas Connection Size (in. FPT)
125
.50
125
.50
180
.75
180
.75
180 .75 180 .75 224 .75 224 .75
224 .75 224 .75 250 .75 — —
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 ± 7
FREEZE PROTECTION THERMOSTAT
Opens (F) 30 ± 5
Closes (F) 45 ± 5
OUTDOOR-AIR INLET SCREENS Cleanable
Quantity...Size (in.)
1...20 x 25 x 1
1...16 x 25 x 1
RETURN-AIR FILTERS Throwaway
Quantity...Size (in.) 4...16 x 20 x 2 4...20 x 20 x 2 4...20 x 20 x 2 4...20 x 20 x 2
Bhp — Brake Horsepower
581B — OPTION/ACCESSORY WEIGHTS
Option / Accessory
036 048 060 072 090 102 120 150
lb kg lb
k
g
lb kg lb kg lb kg lb kg lb kg lb kg
Perfect Humidity
Dehumidification System
15 7 23102511291344 20 51 23 51 23 51 23
Power Exhaust - vertical 50 23 50 23 50 23 50 23 75 34 75 34 75 34 75 34
Power Exhaust - horizontal 30 14 30 14 30 14 30 14 30 14 30 14 30 14 30 14
EconoMi$er ( IV or 2) 50 23 50 23 50 23 50 23 75 34 75 34 75 34 75 34
Two Position damper
(25%)
22 10 22 10 22 10 22 10 32 15 32 15 32 15 32 15
Two Position damper
(100%)
39 18 39 18 39 18 39 18 58 26 58 26 58 26 58 26
Manual Dampers 12 5 12 5 12 5 18 8 18 8 18 8 18 8 18 8
Hail Guard (louvered) 16 7 16 7 16 7 16 7 34 15 34 15 34 15 34 15
Hail Guard (standard hood
assembly)
25 11 25 11 25 11 25 11 38 17 50 23 50 23 50 23
Cu/Cu Condenser Coil 6 3 13 6 13 6 15 7 12 5 23 10 23 10 23 10
Cu/Cu Condenser and
Evaporator Coils
12 5 19 9 21 10 26 12 25 11 49 22 49 22 49 22
Roof Curb (14-in. curb) 115 52 115 52 115 52 115 52 143 65 143 65 143 65 143 65
Roof Curb (24-in. curb) 197 89 197 89 197 89 197 89 245 111 245 111 245 111 245 111
581B036-150
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