RT-PRC024-EN 19
General Data
(17½, 20 Tons Standard Efficiency)
Heating Performance
(viii)
(Gas/Electric Only)
Heating Models Low High Low High
Heating Input (Btuh) 250,000 350,000 250,000 400,000
1st Stage (Btu) 175,000 250,000 175,000 300,000
Heating Output (Btuh) 203,000 284,000 203,000 324,000
1st Stage (Btu) 142,000 203,000 142,000 243,000
AFUE (%)
(ix)
Downflow/Horizontal 80.7/79.9 80.1/79.1 80.2/81.0 79.8/79.7
Steady State Efficiency% 81.0 81.0 81.0 81.0
No. Burners 11
No. Stages 22
Gas Supply Line Pressure (in w.c.)
Natural or LP (minimum/maximum) 2.5/14.0 2.5/14.0
Gas Connection Pipe Size (in.) 1/2 3/4 1/2 3/4
(i)
Cooling Performance is rated at 95°F ambient, 80°F entering dry bulb, 67°F entering wet bulb. Gross capacity does not include the effect of fan motor
heat. ARI capacity is net and includes the effect of fan motor heat. Units are suitable for operation to ±20% of nominal cfm. Certified in accordance with
the Unitary Large Equipment Certification Program, which is based on ARI Standard 340/360-93.
(ii)
EER is rated at ARI conditions and in accordance with ARI Standard 210/240 or 360.
(iii)
Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80°F ambient, 80°F entering dry bulb, and 67°F
entering wet bulb at ARI rated cfm.
(iv)
Outdoor Sound Rating shown is tested in accordance with ARI Standard 270 or 370.
(v)
For 380V/60Hz units, the oversized motor (Indoor Fan) is used as the standard motor. Refer to oversized motor data.
(vi)
An optional 2 inch pleated filter is also available.
(vii)
Refrigerant charge is an approximate value. For a more precise value, see unit nameplate and service instructions.
(viii)
Heating Performance limit settings and rating data were established and approved under laboratory test conditions using American National Standards
Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations above 2000 feet, ratings should be reduced at the rate of 4% for
each 1000 feet above sea level.
(ix)
AFUE is rated in accordance with DOE test procedures.
*Indicates both downflow/horizontal units.
Table 2. (continued) General Data — 17½-20 Tons
17½ Tons Downflow & Horizontal Units 20 Tons Downflow & Horizontal Units
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