AIR COOLED CONDENSER AND FLUID COOLER - …

1 Levitor II. AIR COOLED CONDENSER AND FLUID COOLER . Technical Bulletin Products that provide lasting solutions. Levitor II Air COOLED CONDENSER Table of Contents Benefits and Features 1. System Selection 2. Levitor Application 3. Model Key 4. LAVE/LEVE CONDENSER Performance Data, One and Two Fans Wide 5. LAVA/LEVA CONDENSER Performance Data, One and Two Fans Wide 7. LAVC/LEVC CONDENSER Performance Data, One and Two Fans Wide 9. LAVF/LEVF CONDENSER Performance Data, One and Two Fans Wide 11. Dimensional Drawings 13. LAVB CONDENSER Performance Data, One and Two Fans Wide 14. Dimensional and Electrical Data 15. Control Panel Nomenclature 16. Standard Fan Cycling/Control Arrangements 17. Low Ambient Controls 18. Fan Cycling Sequence 18. Mounted Receivers 19. Mounted Receiver Diagrams 20. Wiring Diagram 22. Replacement Parts 23.

2 LEVITOR II AIR COOLED CONDENSER . Specifications subject to change without notice. Levitor II Air COOLED CONDENSER Benefits and Features The LEVITOR system addresses refrigerant coil wear and leaks due to vibration and thermal stress. LEVITOR Coil Design Eliminates Refrigerant Tube Wear Environmental concerns and spiraling cost of refrigerants have led to the development of direct drive remote air- COOLED condensers with the LEVITOR coil support system. This innovative design uses dedicated stainless steel tubes and a unique coil support system to isolate refrigerant tubes from the unit. Coil support is transferred from the fins to the stainless tubes and truncated tube plates which ride freely in C . channels. Tubes expand and contract without interference. The result, Rooftop condensers have to operate in some of the toughest conditions imaginable.

3 Temperature extremes contact and friction wear are eliminated. result in constant expansion and contraction of refrigerant Quiet by Design tubes as fans cycle and loads vary. LEVITOR coil design does more than just eliminate tube wear. Sound The consequences are costly: rapid tube wear results in reduction is an added benefit. Unlike traditional air- COOLED condensers , leaks, system breakdown and loss of costly refrigerant. fan and coil vibration are isolated from the cabinet, so it is not transmitted to the unit frame and building supports. Low Sound Quietor Fan High Efficiency Coil n The swept-wing blade design offers lower noise levels at n Copper tubes are mechanically expanded into the same fan speed. For example, the QUIETOR fan blade corrugated full collared aluminum fins spaced 8, 10. on a 575-rpm motor will be much quieter (8 dBA) than the or 12 per inch.

4 Coils are helium leak and pressure old 575-rpm fan. tested with 400 psig. dry air, shipped pressurized n Lower noise condensers can translate into savings for your with dry nitrogen. customer by minimizing the need of costly noise barriers. n Optional fin materials are copper, heresite, electrofin n Quietor fan not available on 18 models. or polyester coated aluminum. Multi-circuited coils are available. Liquid subcooling circuits are available. Exclusive 3-year Limited Warranty n We're so confident about our new suspended coil Direct Driven Propeller Fans n Quiet multi-bladed propeller fans provide uniform air design that it is protected by a 3-year limited warranty on workmanship and material. It gives you extra distribution through the coil. Venturi fan orifices protection from premature tube wear. See optimize efficiency.

5 For complete warranty. Weather Resistant Fan Motors Computerized Circuiting n Outdoor CONDENSER motors designed with ball bearings n Our computerized coil circuiting program is designed to inherent overheat protection in each phase; shaft minimize the CONDENSER refrigerant charge and maximize slingers; enclosure, hardware, and lubrication for all subcooling. Every CONDENSER will be custom circuited to weather conditions. Each motor lead is wired to precisely meet your application needs. terminals in an electrical enclosure. Modular Design Versatile Fan Cycling Control Methods n Arranged for vertical or horizontal air discharge. n Temperature fan cycling. Multi-fan sections compartmented to allow individual fan n Pressure fan cycling. cycling while preventing off-fan windmilling . Large n Temperature and pressure fan cycling.

6 Clean-out access doors standard. n Electronic relay boards. Corrosion Resistant n Variable speed header end fans. n All models employ mill galvanized steel fan sections and n Inverter ready motors. coil side baffles. Legs are heavy gauge mill galvanized steel. US. LEVITOR II AIR COOLED CONDENSER 1. Specifications subject to change without notice. Levitor II Air COOLED CONDENSER System Selection THR Total Heat of Rejection n CONDENSER total heat of rejection (BTU/h) is the sum of the evaporator refrigeration effect and the heat of compression which varies with compressor type and operating conditions. THR Calculation Method TABLE 1. n THR = Open Reciprocating Compressor Capacity HERMETIC COMPRESSOR. (BTU/h) + (2545 x BHP) EVAPORATOR CONDENSING TEMPERATURE ( F). n THR = Suction Gas COOLED Hermetic Reciprocating TEMP ( F) 90 100 110 120 130 140.

7 Compressor Capacity (BTU/h) + (3413 x kW) -40 * *. -30 * *. THR Estimated Method -20 * *. n THR may be estimated by multiplying the rated -10 *. compressor BTU/h capacity by the compressor 0 operating condition factor shown in Table 1 or 2. 5 Multiply result by altitude factor when applicable. 10 15 20 TABLE 2 25 OPEN COMPRESSOR 30 40 EVAPORATOR CONDENSING TEMPERATURE ( F). TEMP ( F) 90 100 110 120 130 140 50 *Beyond the normal limits for single stage compressor application. -30 * * *. -20 * * TABLE 3. -10 *. ALTITUDE. 0 10 FEET FACTOR FEET FACTOR. 20 1,000 5,000 30 2,000 6,000 40 3,000 7,000 50 4,000 8,000 *Beyond the normal limits for single stage compressor application. Multi-Circuit Selection n CONDENSER coils may be divided into several individual refrigeration circuits or systems; each sized for a specific refrigerant, THR capacity and TD.

8 Systems are tagged for identification from left to right; facing the connection end. Avoid locating high TD sections next to low TD sections. Add excess circuits to low TD sections next to High TD sections. Add excess circuits to outboard sections. Thermal Fantrol fan cycling is recommended with multi-circuited condensers . SAMPLE CALCuLATIOn: 95 F AMBIEnT-SuCTIOn COOLED SEMI-HERMETIC RECIPROCATInG COMPRESSORS. COMP DESIGN SAT SAT COMPRESSOR RATING BASED ON R-22 AT 15 FTD CAP SYSTEM ACTUAL. NOM TD SUCT COND NET MOTOR TOTAL REF TD SELECT PER CIRCUIT # NUMBER TD. HP REF F F F BTU/h kW BTU BTU/h FACTOR FACTOR THR CIRCUIT REQ'D CIR L TO R F. 6 134a 15 +20 110 40090 14676 54,766 x = 57648 13503 4 1 9 404A 10 -20 105 45900 27645 73,545 x = 112569 13503 10 2 10 404A 10 -20 105 50640 32765 83,405 x = 127661 13503 10 3 12 22 15 +20 110 104000 33106 137,106 x = 137106 13503 10 4 UNIT THR REQ'D 434984 34.

9 Selection n LAVA-15310 Rated at THR of MBH with R-22 at 15 F TD. LAVA-15310 Unit lists 34 Circuits. REF FACTOR TD FACTOR. R-22- 10 n Sample Calculation: THR Req' = 434984 34 = 12784. LAVA-15310 = 459100 34 = 13503 (Available THR/Circuit). * R-134a- 15 **R-404A- 20 n Circuits Req'd. = Select THR THR/Circuit. Example: 57648 13503 = Circuits. 25 n Assign Number of Circuits System and System Number Left to Right. *Usable for R-12. Actual TD = (Circuits Req'd Assign Circuits) x Design TD. **Usable for R-502, R-507. Example: 4 x 15 = Levitor II Air COOLED CONDENSER Levitor Application Locate condensers no closer than their width from walls Gravity Liquid Drain Lines should drop from each or other condensers . Avoid locations near exhaust fans, outlet as low as possible before headering or running plumbing vents, flues or chimneys.

10 Horizontally. Pitch downhill to receiver. Parallel condensers should be the same models resulting Off-Line Coil Sections will have refrigerant pressures in the same refrigerant side pressure drops. Compressor corresponding to the ambient. Check valves or isolating discharge lines should have equal pressure drops to each valves should be installed in the liquid line drains to CONDENSER . prevent refrigerant migration and receiver pressure loss. CONDENSER Charge will approximate 30% of the Liquid Subcooling may be accomplished with a section maximum flooding charge listed under Specifications for of circuits in the coil. Liquid outlet temperature will summer design conditions. Low ambient head pressure approach the entering air temperature by approximately controls require an additional charge, which is difficult to 5 F.