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Bryant 581C Manual De Usuario

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PHYSICAL DATA — 581A155,180
                       LEGEND
*Evaporator coil fin material/condenser coil fin material.
†Weight of 14-in. roof curb.
**Circuit 1 uses the lower portion of condenser coil and lower portion of evaporator coils, and
Circuit 2 uses the upper portion of both coils.
††Due to belt and pulley style, moveable pulley cannot be set to 0 to 
1
/
2
 turns open.
***Rollout switch is manual reset.
†††A Liquid Propane kit is available as an accessory. Kit may be used at elevations as high as
2000 ft.
UNIT 581A
155
180
208/230
460
575
208/230
460
575
NOMINAL CAPACITY (tons)
12
15
OPERATING WEIGHT (lb)
Unit
Al/Al*
1725
1800
Al/Cu*
1875
1950
Cu/Cu*
2005
2080
EconoMi$er IV
90
90
EconoMi$er2
85
85
Roof Curb†
200
200
Hot Gas Reheat Dehumidification Package
—
40
COMPRESSOR
Quantity...Model (Ckt 1, Ckt 2)
2...ZR72KC
1...ZR94KC, 1...ZR72KC
Number of Refrigerant Circuits
2
2
Loading (% of full capacity)
0,53,100
0,60,100
Crankcase Heater Watts
70
70
Oil (oz) (Ckt 1, Ckt 2)
60,60
85,60
REFRIGERANT TYPE
R-22
Expansion Device
TXV
Operating Charge (lb)
Circuit 1**
20.7
19.5
Circuit 2
13.4
13.45
CONDENSER FAN
Propeller Type
Nominal Cfm
10,500
10,500
Quantity...Diameter (in.)
3...22
3...22
Motor Hp...Rpm
1
/
2
...1050
1
/
2
...1050
Watts Input (Total)
1100
1100
CONDENSER COIL
Cross-Hatched 
3
/
8
-in. Copper Tubes, Aluminum Lanced, Aluminum 
Pre-Coated, or Copper Plate Fins
Rows...Fins/in.
4...15
4...15
Total Face Area (sq ft)
21.7
21.7
EVAPORATOR FAN
Centrifugal Type
Quantity...Size (in.)
2...12 X 12
2...12 x 12
Type Drive
Belt
Belt
Nominal Cfm
5200
6000
Std Motor Hp
2.9
3.0
5
Opt Motor Hp
3.7
N/A
N/A
Motor Nominal Rpm
1725
1745
Std Maximum Continuous Bhp
3.13
3.38
6.13
Opt Maximum Continuous Bhp
4.26
N/A
Motor Frame Size
56H
184T
Fan Rpm Range
Low-Medium Static
895-1147
895-1147
873-1021
High Static
1040-1315
N/A
1025-1200
Motor Bearing Type
Ball
Ball
Maximum Allowable Rpm
1550
1550
Motor Pulley Pitch Dia.
Low-Medium Static
3.1/4.1
3.1/4.1
4.9/5.9
High Static
3.7/4.7
N/A
4.9/5.9
Nominal Motor Shaft Diameter (in.)
7
/
8
7
/
8
1
1
/
8
Fan Pulley Pitch Diameter (in.)
Low-Medium Static
6.0
6.0
9.4
High Static
6.0
6.0
8.0
Nominal Fan Shaft Diameter (in.)
1
3
/
16
1
3
/
16
1
7
/
16
Belt, Quantity...Type... Length (in.)
Low-Medium Static
1...BX...45
1...BX...45
1...BX...50
High Static
1...BX...45
1...BX...45
1...BX...48
Pulley Center Line Distance (in.)
14.5-16.0
14.5-16.0
13.3-14.8
Speed Change per Full Turn of Movable
Pulley Flange (Rpm)
Low-Medium Static
45
45
37
High Static
45
N/A
44
Movable Pulley Maximum
Full Turns From Closed Position
6
6
4††
Factory Speed
3.5
3.5
3.5
Factory Speed Setting (Rpm)
Low-Medium Static
987
987
965
High Static
1155
N/A
1134
EVAPORATOR COIL
Cross-Hatched 
3
/
8
-in. Copper Tubes, Aluminum Lanced or Copper Plate Fins, Face Split
Rows...Fins/in.
4...15
4...15
Total Face Area (sq ft)
17.5
17.5
FURNACE SECTION
Rollout Switch Cutout Temp (F)***
190
190
Burner Orifice Diameter (in...drill size)
Natural Gas
                             Std
0.1285...30/ 0.136...29
0.1285...30/ 0.136...29
Liquid Propane†††
                            Alt
0.1065...36/0.1065...36
0.1065...36/0.1065...36
Thermostat Heat Anticipator Setting
208/230/460/575 v
Stage 1 (amps)
0.98
0.8
0.98
0.98
0.8
0.98
Stage 2 (amps)
0.44
0.44
0.44
0.44
0.44
0.44
Gas Input (Btuh) Stage 1
172,000/230,000
206,000/270,000
Stage 2
225,000/300,000
275,000/360,000
Efficiency (Steady State) (%)
81
81
Temperature Rise Range
15-45/30-60
15-45/20-50
Manifold Pressure (in. wg)
Natural Gas
                             Std
3.3
3.3
Liquid Propane†††
                            Alt
3.3
3.3
Gas Valve Quantity
1
1
Gas Valve Pressure Range (Min-Max Allowable) (in. wg)
5.5-13.5
5.5-13.5
(psig)
.235-.487
.235-.487
Field Gas Connection Size (in.-FPT)
3
/
4
3
/
4
HIGH-PRESSURE SWITCH (psig)
Cutout
426
Reset (Auto.)
320
LOW-PRESSURE SWITCH (psig)
Cutout
27
Reset (Auto.)
44
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
Al
— Aluminum
Bhp — Brake Horsepower
Cu
— Copper
TXV — Thermostatic Expansion Valve