3
50ZH
ARI* capacities
COOLING CAPACITIES AND EFFICIENCIES
Physical data
* Required filter sizes shown are based on the ARI (Air Conditioning & Refrigeration Institute) rated cooling air-
flow at a velocity of 300 ft/minute for throwaway type or 450 ft/minute for high-capacity type. Recommended fil-
ters are 1-in. thick.
UNIT
50ZH
(–SERIES)
NOMINAL
TONS
STANDARD
CFM
NET COOLING
CAPACITIES
AT 95°F (Btuh)†
SEER†
NET HEATING
CAPACITIES
AT 47°F (Btuh)†
HSPF†
HIGH HEAT
COP
AT 47°F
SOUND
RATINGS**
(dB)
030 2.5 1000 28,200 10.00 27,200 6.8 2.9 81
036 3.0 1200 34,200 10.00 33,800 6.8 3.0 78
042 3.5 1400 40,000 10.00 40,000 6.8 3.0 78
048 4.0 1600 44,500 10.00 45,000 6.8 3.0 80
060 5.0 2000 55,000 10.50 52,500 6.8 3.0 84
UNIT SIZE 50ZH 030 036 042 048 060
OPERATING WEIGHT (lb)
254 277 295 328 368
COMPRESSOR TYPE
Scroll
REFRIGERANT
R-22
CHARGE (lb)
5.6 5.9 6.6 9.1 9.7
REFRIGERANT METERING DEVICE
Acutrol™ System
OUTDOOR COIL
Copper Tubes, Aluminum Plate Fins
Rows—Fins/in.
Face Area (sq ft)
2—17
6.7
1—17
11.1
2—17
9.33
2—17
11.1
2—17
12.7
OUTDOOR-FAN MOTOR
Propeller
Nominal Cfm
Nominal Rpm
Motor Hp (Rpm)
Diameter (in.)
2000
1100
1/4
20
2600
1100
1/4
20
2600
1100
1/4
20
2600
1100
1/4
20
3200
1100
1/2
20
EVAPORATOR COIL
Copper Tubes, Aluminum Plate fins
Rows—Fins/in.
Face Area (sq ft)
3—15
3.1
3—15
4.0
3—15
4.0
4—15
4.4
4—15
4.9
EVAPORATOR-FAN MOTOR
Direct Drive
Blower Motor Size (in.)
Nominal Cfm
Rpm Range
Number of Speeds
Factory Speed Setting
Motor Hp
10 x 8
1000
550-1000
3
Med
1/4
10 x 9
1200
800-1050
3
Low
1/2
10 x 9
1400
800-1050
3
Med
1/2
10 x 9
1600
1000-1100
2
Low
3/4
10 x 10
2000
950-1100
3
Low
1
CONNECTING DUCT SIZES
Round Square
Supply Air (in.)
Return Air (in.)
14
14
13.9 x 13.9
13.9 x 27.8
FIELD-SUPPLIED RETURN AIR FILTER*
Throwaway (in.)
24 x 24 x 1 24 x 24 x 1 24 x 24 x 1 24 x 30 x 1 24 x 30 x 1
LEGEND
dB — Sound Levels (decibels)
HSPF — Heating Seasonal Performance Factor
SEER — Seasonal Energy Efficiency Ratio
COP — Coefficient of Performance
* Air Conditioning & Refrigeration Institute.
† Rated in accordance with U.S. Government DOE (Department of
Energy) test procedures and/or ARI Standard 210/240-89.
** Rated in accordance with ARI Standard 270-84.
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