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Packaged Rooftop
Air Conditioners
27 ½ to 50 Ton - 60 Hz
Voyager™ Commercial
October 2001 RT-PRC007-EN
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Introduction Packaged Rooftop Air Conditioners Through the years, Trane has designed Voyager Commercial features cutting ® edge technologies like the reliable 3-D and developed the most complete line of Packaged Rooftop products available in Scroll compressors, Trane engineered the market today. Trane was the first to microprocessor controls, computer- aided run testing, and Integrated introduce the Micro —microelectronic unit controls— and again moved ahead Comfort™ Systems. So, whether you’re
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Contents Introduction 2 Features and Benefits 4 Application Considerations 10 Selection Procedure 12 Model Number Description 14 General Data 15 Performance Data 19 Performance Adjustment Factors 18 Controls 28 Electric Power 32 Dimension and Weights 34 Mechanical Specifications 41 RT-PRC007-EN 3
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Features and Benefits Standard Features Optional Features Factory installed and commissioned Electric heat microelectronic controls Natural gas heat Trane 3-D™ Scroll Compressors LP gas heat (kit only) Dedicated downflow or horizontal Power Exhaust configuration Barometric Relief CV or VAV control High Efficiency 2” Throwaway Filters FROSTAT™ coil frost protection on all High Efficiency 4” Throwaway Filters units High Efficiency supply fan motors Supply air overpressu
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Features and Benefits ® Proven Design Through T esting and than 400,000 hours of laboratory testing Trane 3-D Scroll Compressor Research and field operation. This work combined Simple Design with 70% Fewer Parts with over 25 patents makes Trane the With over twenty years of development Fewer parts than an equal capacity worldwide leader in air conditioning and testing, Trane 3-D Scroll reciprocating compressor means scroll compressor technology. compressors have undergone more significant reliab
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Features and Benefits Quality and Reliability Forced Combustion Blower Negative Pressure Gas Valve Hot Surface Ignitor Drum and Tube Heat Exchanger Micro Controls Drum and Tube Heat Exchanger The negative pressure gas valve will not allow gas flow unless the combustion The Micro provides unit control for The drum and tube heat exchanger is blower is operating. This is one of our heating, cooling and ventilating utilizing designed for increased efficiency and unique safety features. reliability
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Features and Benefits Ease of Installation FC Fans with Inlet Guide Vanes Contractors look for lower installation Trane’s forward-curved fans with inlet (jobsite) costs. Voyager’s conversionless guide vanes pre-rotate the air in the units provide many time and money direction of the fan wheel, decreasing saving features. static pressure and horsepower, essentially unloading the fan wheel. The Conversionless Units unloading characteristics of a Trane FC The dedicated design units (either fan with
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Features and Benefits Easy Access Low Voltage T erminal Board Easy to Service Voyager’s Low Voltage Terminal Board is Because today’s owners are very cost- external to the electrical control cabinet. conscious when it comes to service and It is extremely easy to locate and attach maintenance, the Trane Voyager was the thermostat wire. This is another cost designed with direct input from service and time-saving installation feature. contractors. This valuable information helped to design a produc
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Features and Benefits VariT rac Downflow and Horizontal Economizers Trane’s changeover VAV System for light The economizers come with three commercial applications is also control options dry bulb, enthalpy and available. Coupled with Voyager differential enthalpy. (Photo above Commercial, it provides the latest in shows the three fresh air hoods on the technological advances for comfort Horizontal Discharge Configuration). management systems and can allow thermostat control in every zone serve
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Application Considerations Exhaust Air Options amounts of outdoor air into the building. 3 If, however, building pressure is not of a When is it necessary to provide building Use the actual cfm and the corrected critical nature, the non-modulating exhaust? static pressure to determine the fan rpm exhaust fan may be sized for more than and bhp from the rooftop performance Whenever an outdoor air economizer is 50 percent of design supply airflow. tables or curves. used, a building generally requir
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Application Considerations 4 Heat selections other than gas heat will When two or more units are to be placed not be affected by altitude. Nominal gas side by side, the distance between the If several units are to be placed on one capacity (output) should be multiplied by units should be increased to 150 percent span, they should be staggered to the factors given in Table PD-3 before of the recommended single unit reduce deflection over that span. calculating the heating supply air clearance. Th
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Selection Procedure Selection of Trane commercial air b A psychrometric chart can be used to conditioners is divided into five basic more accurately determine the mixture 2” Hi-efficiency throwaway filters. areas: temperature to the evaporator coil. c 1 Step 4 — Determine total required unit Exhaust fan. cooling capacity: Cooling capacity d Required capacity = total peak load + 2 O.A. load + supply air fan motor heat. Economizer cycle. Heating capacity From Figure SP-1, the supply air fan Step 1
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Selection Procedure The supply air fan motor selected in the Heating capacity selection: Table PD-9 also shows an air temperature rise of 23.6 F for 12,000 cfm previous cooling capacity determination 1 through the 90 kw heat module. example was 7.27 bhp with 652 rpm. Winter outdoor design conditions—5 F. Thus, the supply fan motor selected is 7.5 Unit supply temperature at design hp. 2 heating conditions = mixed air temperature + air temperature rise = 66.4 To select the drive, enter Table PD-15
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Model Number Description 5 YC D 480 A 4 H A 1 A 4 F D 1 A 0000000 0 0 0 0 0 12 3 456 7 8 9 1011 1213 14 151617 18192021222324 2526 272829 Digit 16 — System Control Digit 13 — Supply Fan Motor, HP Digit 1, 2 — Unit Function 1 = Constant Volume 1 = 7.5 Hp Std. Eff. TC = DX Cooling, No Heat 2 = VAV Supply Air Temperature Control 2 = 10 Hp Std. Eff. TE = DX Cooling, Electric Heat w/o Inlet Guide Vanes 3 = 15 Hp Std. Eff. YC = DX Cooling, Natural Gas Heat 3 = VAV Supply Air Temperature Control 4 = 20
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General Data Table GD-1 — General Data — 27 1/2 - 30 Tons 27 1/2 T on 30 T on 1 Cooling Performance Nominal Gross Capacity 329,000 363,000 2 Natural Gas Heat Low High Low High Heating Input (BTUH) 350,000 600,000 350,000 600,000 First Stage 250,000 425,000 250,000 425,000 Heating Output (BTUH) 283,500 486,000 283,500 486,000 First Stage 202,500 344,500 202,500 344,500 3 Steady State Efficiency (%) 81.00 81.00 81.00 81.00 No. Burners 1 2 1 2 No. Stages 2 2 2 2 3 3 Gas Conn
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General Data Table GD-2— General Data — 35-40 Ton 35 T on 40 T on 1 Cooling Performance Nominal Gross Capacity 417,000 513,000 2 Natural Gas Heat Low High Low High Heating Input (BTUH) 350,000 600,000 400,000 800,000 First Stage 250,000 425,000 300,000 600,000 Heating Output (BTUH) 283,500 486,000 324,000 648,000 First Stage 202,500 344,500 243,000 486,000 3 Steady State Efficiency (%) 81.00 81.00 81.00 81.00 No. Burners 1212 No. Stages 2222 3 3 Gas Connection Pipe Size (i
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General Data Table GD-3— General Data — 50 Ton Table GD-4 — Economizer Outdoor Air 50 T on Damper Leakage (Of Rated Airflow) 1 Cooling Performance ∆ P Across Dampers (In. WC) Nominal Gross Capacity 616,000 0.5 (In.) 1.0 (In.) 2 Natural Gas Heat Low High Standard 1.5 % 2.5 % Heating Input (BTUH) 400,000 800,000 Optional “Low Leak” 0.5 % 1.0 % First Stage 300,000 600,000 Note: Above data based on tests completed in Heating Output (BTUH) 324,000 648,000 accordance with AMCA Standard
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Performance Adjustment Factors Table PD-1— Enthalpy of Saturated AIR Figure PD-1 — Air Density Ratios Altitude/Temperature Correction Wet Bulb Temperature Btu Per Lb. 40 15.23 41 15.70 42 16.17 43 16.66 44 17.15 45 17.65 46 18.16 47 18.68 48 19.21 49 19.75 50 20.30 51 20.86 Air Density 52 21.44 Ratio (Density 53 22.02 at New 54 22.62 55 23.22 Air Density) Condition/Std. 56 23.84 57 24.48 58 25.12 59 25.78 60 26.46 61 27.15 62 27.85 63 28.57 64 29.31 65 30.06 66 30.83 67 31.62 68 32.42 Rooftop Le
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Performance Data Table PD-4 — 27 1/2 Ton Gross Cooling Capacities (MBh) Ambient Temperature — Deg F 85 95 105 115 Ent Entering Wet Bulb Temperature — Deg F DB 61 67 73 61 67 73 61 67 73 61 67 73 CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC 75 291 228 323 185 358 130 278 221 309 174 343 123 265 213 295 167 327 116 251 206 279 159 310 109 8000 80 294 268 324 220 359 171 281 261 310 212 343 164 268 253 296 205 327 157 255 246 280 197 311 1
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Performance Data Table PD-6 — 35 Ton Gross Cooling Capacities (Mbh) Ambient Temperature — Deg F 85 95 105 115 Ent Entering Wet Bulb Temperature — Deg F DB 61 67 73 61 67 73 61 67 73 61 67 73 CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC 75 377 310 416 240 459 166 361 301 398 231 438 158 343 291 379 223 417 150 325 282 359 214 396 141 10500 80 383 367 417 296 460 224 366 359 399 287 439 216 350 349 380 278 418 207 332 332 360 268 397 198 8
