ARI* capacities
UNIT
50ZH
NOMINAL
TONS
STANDARD
CFM
NET COOLING
CAPACITIES
AT 95 F (Btuh)
SEER†
NET HEATING
CAPACITIES
AT 47 F (Btuh)
HSPF
SOUND
RATINGS**
(bels)
024 2.0 800 22,800 10.00 21,800 6.8 7.8
030 2.5 1000 28,200 10.00 27,200 6.8 8.4
036 3.0 1200 34,200 10.00 33,800 6.8 8.0
042 3.5 1400 40,000 10.00 40,000 6.8 8.0
048 4.0 1600 46,000 10.00 45,000 6.8 8.2
060 5.0 2000 55,000 10.50 52,500 6.8 8.4
LEGEND
Bels — Sound Levels (1 Bel = 10 Decibels)
HSPF — Heating Seasonal Performance Factor
SEER — Seasonal Energy Efficiency Ratio
*Air Conditioning and 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.
Physical data
UNIT 50ZH 024 030 036 042 048 060
OPERATING WEIGHT (lb) 232 254 277 295 328 368
COMPRESSOR TYPE Scroll
REFRIGERANT R-22
Charge (lb) 3.1 5.6 5.9 6.6 8.6 9.7
REFRIGERANT METERING DEVICE Acutrol™ System
OUTDOOR COIL Copper Tubes, Aluminum Plate Fins
Rows...Fins/in. 1...17 2...17 1...17 2...17 2...17 2...17
Total Face Area (sq ft) 7.9 6.7 11.1 9.3 11.1 12.7
OUTDOOR-FAN MOTOR Propeller
Nominal Cfm 1800 2000 2600 2600 2600 3200
Nominal Rpm 825 1100 1100 1100 1100 1100
Motor Hp
1
⁄
8
1
⁄
4
1
⁄
4
1
⁄
4
1
⁄
4
1
⁄
2
Diameter (in.) 20 20 20 20 20 20
INDOOR COIL Copper Tubes, Aluminum Plate Fins
Rows...Fins/in. 2...15 3...15 3...15 3...15 4...15 4...15
Total Face Area (sq ft) 3.1 3.1 4.0 4.0 4.4 4.9
INDOOR-FAN MOTOR Direct Drive
Blower Motor Size (in.) 10x8 10x8 10x9 10x9 10x9 10×10
Nominal Cfm 800 1000 1200 1400 1600 2000
Rpm Range 550-1000 550-1000 800-1050 800-1050 1000-1100 950-1100
Number of Speeds 3333 2 3
Factory Speed Setting Low Med Low Med Low Low
Motor Hp
1
⁄
4
1
⁄
4
1
⁄
2
1
⁄
2
3
⁄
4
1
CONNECTING DUCT SIZES Round Square
Supply Air (in.) 14 13.9 × 13.9
Return Air (in.) 14 13.9 × 27.8
FIELD-SUPPLIED RETURN AIR FILTER*
Throwaway (in.) 24x24 24x24 24x24 24x24 24x30 24×30
*Required filter sizes shown are based on the ARI (Air Conditioning and Refrigeration Institute) rated
airflow at a velocity of 300 ft/min for throwaway type or 450 ft/min for high capacity type. Recom-
mended filters are 1-in. thick.
3
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