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UV-PRC004-EN.book Page 2 Monday, February 4, 2013 11:01 AM Introduction Trane Horizontal Classroom Unit Ventilator A Classroom Choice in HVAC Classroom unit ventilators have been cost effective way to heat and cool schools for over half a century. Many schools choose classroom unit ventilators because of their ability to heat, cool and ventilate, as well as their durable cabinet design and small foot print.
UV-PRC004-EN.book Page 3 Monday, February 4, 2013 11:01 AM Introduction maintenance free and extended motor life. Each motor has a built-in microprocessor that allows for programmability, soft ramp-up, better airflow control, and serial communication. Additionally, this is the industry’s first solution that is factory-mounted, -wired, and -programmed for infinite modulation of fan speed based on space loads, using the Tracer UC400.
UV-PRC004-EN.book Page 4 Monday, February 4, 2013 11:01 AM Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Trane Horizontal Classroom Unit Ventilator . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 A Classroom Choice in HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UV-PRC004-EN.book Page 5 Monday, February 4, 2013 11:01 AM Features and Benefits Made for the Classroom Equipment Size The horizontal unit ventilator delivers from 750 cfm to 2000 cfm. Trane’s unit ventilator is sized to fit any replacement or new construction application. Cabinet Finish The unit cabinetry is made of durable industrial grade metal for hard wearing applications.
UV-PRC004-EN.book Page 6 Monday, February 4, 2013 11:01 AM Features and Benefits Energy Efficiency Trane’s commitment to providing premium quality products has led to the exclusive use of Electronically Commutated Motors (ECM) in all Unit Ventilators. These brushless DC motors incorporate the latest technology for optimized energy efficiency, acoustical abatement, maintenance free and extended motor life.
UV-PRC004-EN.book Page 7 Monday, February 4, 2013 11:01 AM Features and Benefits Drain Pan The unit drain pan is positively sloped to assure proper drainage. The pan is insulated on the bottom to help prevent condensate formation. The pan is simple to remove for cleaning purposes by loosening two front screws. Piping Hydronic piping for the unit ventilator may be factory installed or field provided. It fits painlessly inside the unit end pockets, permitting quick hook-up during the installing phase.
UV-PRC004-EN.book Page 8 Monday, February 4, 2013 11:01 AM Features and Benefits Figure 3. Face and bypass damper Controls • This is the industry’s first solution that is factory-mounted, -wired, and -programmed for infinite modulation of fan speed based on space loads, using the Tracer™ UC400. • Auto Fan Speed control with the Tracer ZN520 ramps the fan speed up and down to meet space loads. • All controls are factory-mounted and tested to minimize field setup and improve reliability.
UV-PRC004-EN.book Page 9 Monday, February 4, 2013 11:01 AM Features and Benefits system decisions. That is why the industry has developed performance standards and certification programs which ensure that the equipment information provided to the design community is correct and comparable across different manufacturers. The following list of certifications identifies Trane’s commitment in providing the highest quality equipment to their customers.
UV-PRC004-EN.book Page 10 Monday, February 4, 2013 11:01 AM Application Considerations Fully Recessed Unit The horizontal unit ventilator may be fully recessed into the ceiling space to provide greater noise reduction to the space. With this application, duct collars on the outside air inlet, return air inlet and discharge air outlet are available for ease of duct work connection to the equipment.
UV-PRC004-EN.book Page 11 Monday, February 4, 2013 11:01 AM Application Considerations Digit 20 = H Partially Exposed Unit Another example of a partially exposed unit ventilator includes a fresh air upper back, with a return air lower back, combined with a bottom, double-deflection discharge. This application requires field supplied duct work to the added to the return air side of the unit ventilator.
UV-PRC004-EN.book Page 12 Monday, February 4, 2013 11:01 AM Application Considerations Condensate Piping The horizontal unit ventilator drain pan connection is located on the same side as the cooling coil connections (hydronic and DX coils). The stubout size is 3 /4” outside diameter. All field supplied condensate lines to the unit should contain 1/4” in 12” slope away from the unit ventilator to aid in condensate removal. This is typical for most local codes.
UV-PRC004-EN.book Page 13 Monday, February 4, 2013 11:01 AM Application Considerations System choice for the classroom unit ventilator AND/OR CONDENSER FOR COOLING BOILER FOR HEAT ADD OR AT TIL CL OM RO S AS IT UN N VE AND/OR CHILLER FOR COOLING Wide Variety of Heating/Cooling Coils Trane’s unit ventilator offers a wide variety of coil configurations.
UV-PRC004-EN.book Page 14 Monday, February 4, 2013 11:01 AM Application Considerations Performance Application of this product should be within the catalogs airflow and unit performance. The Trane Official Product Selection System (TOPSS™) will aid in the selection process for a set of given conditions. If this program has not been made available, ask a local Trane sales account manager to supply the desired selections or provide a copy of the program.
UV-PRC004-EN.book Page 15 Monday, February 4, 2013 11:01 AM Application Considerations Figure 4. ASHRAE cycle graph Freeze Protection The most important advantage the Trane blow-thru design provides is additional protection against coil freeze-up. In contrast, draw-thru configurations allow little mixing of the return and outside air stream while locating the coil very close to the outside air inlet. This process creates “cold spots” on the coil which could lead to coil freeze-up.
UV-PRC004-EN.book Page 16 Monday, February 4, 2013 11:01 AM Selection Procedures Selecting a Unit Ventilator Trane horizontal classroom unit ventilators provide air delivery and capacities necessary to meet the requirements of modern school classrooms. They are available with the industry’s widest selection of coils to precisely satisfy heating, ventilating and air conditioning loads with the best individual type of system. Unit ventilator selection involves three basic steps.
UV-PRC004-EN.book Page 17 Monday, February 4, 2013 11:01 AM Selection Procedures Example: Given: Air circulation specified = 8 air changes per hour Classroom size = 35 ft long x 25 ft wide x 10 ft high Inside design air temperature = 75°F Ventilation cooling required at 58°F = 29,000 BTU CFM required = [8 changes/hr x (35 x 25 x 10) ft3] / (60 minutes/hr) = 1170 cfm Checking ventilation cooling capacity: 29,800 BTU = 1.
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UV-PRC004-EN.book Page 21 Monday, February 4, 2013 11:01 AM General Data Table 1. Weights and measurements: horizontal unit ventilators Unit Size 075 100 125 150 200 Unit Length (in.) 70-1/4 82-1/4 94-1/4 106-1/4 106-1/4 Unit Height (in.) 16-5/8 16-5/8 16-5/8 16-5/8 17-5/8 Unit Width (Front Discharge) (in.) 35-5/8 35-5/8 35-5/8 35-5/8 43-1/8 Unit Width (Bottom Discharge) (in.
UV-PRC004-EN.book Page 22 Monday, February 4, 2013 11:01 AM General Data Table 6. Coil volume (gallons) Coil Type Unit Size Volume (gal) AA, AB 075 0.72 100 0.85 125 0.99 150–200 1.57 075 0.97 100 1.17 125 1.40 150–200 2.27 075 1.25 100 1.51 125 1.80 150–200 2.96 075 0.86 100 0.98 125 1.13 150–200 1.71 075 1.11 100 1.30 125 1.53 150–200 2.39 075 0.97 100 1.17 125 1.39 150-200 2.25 AC AD & AE DA–DC DD–DE DK H1–H3 H4–H6 R1–R2 X3–X6 22 075 0.
UV-PRC004-EN.book Page 23 Monday, February 4, 2013 11:01 AM General Data Coils Table 7. Coil specifications Hydronic Main Coil • Wavy plate finned • Hydrostatically tested at 350 psi Piping packages for the main coil assembly are always supplied as a 3/4-inch package. Left-hand configuration shown.
UV-PRC004-EN.book Page 24 Monday, February 4, 2013 11:01 AM General Data Coils Table 7. Coil specifications (continued) Steam Auxiliary Coil • 1-Row, tube-in-tube distributing coil • 1-inch female pipe connection Piping packages for steam coils are field provided. The modulating piping valve (option) is shipped loose and field installed. Right-hand configuration shown.
UV-PRC004-EN.book Page 25 Monday, February 4, 2013 11:01 AM General Data Coils Table 8.
UV-PRC004-EN.book Page 26 Monday, February 4, 2013 11:01 AM General Data Controls Table 9. Control methodology Fan Speed FSS 3 or infinite(a) CSTI 3 or infinite(a) Tracer ZN520 3 Tracer UC400 Infinite (a) With a field-supplied 2–10 Vdc controller. Table 10. Control sequences Fan Speeds DX operation(a) 1 Electric heat operation(a) 1 Sidewall Exhaust(b) 2 ERSA(b) 2 (a) Fan speed during sequence operation. (b) Unit Ventilator when operating with option.
UV-PRC004-EN.book Page 27 Monday, February 4, 2013 11:01 AM Performance Data A-Coils AHRI Cooling performance is based on 80/67°F entering air temperature, 45°F entering chilled water temperature with a 10°F ΔT. Heating performance is based on 70°F entering air temp, 180°F entering water temperature with a 40°F ΔT. All performance measured on high speed tap, 115 V. Free discharge units: 0.0 ESP, with throwaway filter. High static units: 0.20 ESP, without filter. Table 11.
UV-PRC004-EN.book Page 28 Monday, February 4, 2013 11:01 AM Performance Data D-Coils AHRI Cooling performance is based on 80/67° F entering air temperature, 45°F entering chilled water temperature with a 10°F ΔT. Heating performance is based on 70°F entering air temp, 180°F entering water temperature with a 40°F ΔT. All performance measured on high speed tap, 115 V. Free discharge units: 0.0 ESP, with throwaway filter. High static units: 0.20 ESP, without filter. Table 13.
UV-PRC004-EN.book Page 29 Monday, February 4, 2013 11:01 AM Performance Data H-, X-Coils AHRI Cooling performance is based on 80/67° F entering air temperature, 45°F entering chilled water temperature with a 10°F ΔT. Heating performance is based on 70°F entering air temp, 180°F entering water temperature with a 40°F ΔT. All performance measured on high speed tap, 115 V. Free discharge units: 0.0 ESP, with throwaway filter. High static units: 0.20 ESP, without filter. Table 15.
UV-PRC004-EN.book Page 30 Monday, February 4, 2013 11:01 AM Performance Data GA-, DK-, R1-, R2-Coils AHRI Cooling performance is based on 80/67 °F entering air temperature, 45°F entering chilled water temperature with a 10°F ΔT. Heating performance is based on 70°F entering air temp, 180°F entering water temperature with a 40°F ΔT. All performance measured on high speed tap, 115 V. Free discharge units: 0.0 ESP, with throwaway filter. High static units: 0.20 ESP, without filter. Table 17.
UV-PRC004-EN.book Page 31 Monday, February 4, 2013 11:01 AM Performance Data DX-Coils Table 19.
UV-PRC004-EN.book Page 32 Monday, February 4, 2013 11:01 AM Performance Data Electric Heat Table 20. Electric heat capacity Unit Size Coil Type No of Elem. Elem. kW Total kW TMBH 075 G3, X3 E4, G4, E6, G6, E7 E9 G3, X3 E4, G4, E6, G6, E7 E9 G3, X3 E4, G4, E6, G6, E7 E9 G3, X3 E4, G4, E6, G6, E7 E9 G3, X3 E4, G4, E6, G6, E7 E9 3 4 6 7 9 3 4 6 7 9 3 4 6 7 9 3 4 6 7 9 3 4 6 7 9 1.95 1.95 1.95 1.95 1.95 2.60 2.60 2.60 2.60 2.60 3.25 3.25 3.25 3.25 3.25 3.80 3.80 3.80 3.80 3.80 3.80 3.80 3.80 3.80 3.
UV-PRC004-EN.book Page 33 Monday, February 4, 2013 11:01 AM Performance Data K1-, K2-Steam Coils Table 21. Steam coil capacity Unit Size Coil Type EAT 5 PSIG TMBH 10 PSIG 15 PSIG 075 K1 -20 0 20 40 60 70 -20 0 20 40 60 70 -20 0 20 40 60 70 -20 0 20 40 60 70 -20 0 20 40 60 70 -20 0 20 40 60 70 -20 0 20 40 60 70 -20 0 20 40 60 70 -20 0 20 40 60 70 85.89 78.94 72.00 65.06 58.12 54.65 101.18 93.00 84.82 76.64 68.46 64.38 112.93 103.80 94.67 85.54 76.41 71.85 158.08 145.30 132.52 119.74 106.96 100.
UV-PRC004-EN.book Page 34 Monday, February 4, 2013 11:01 AM Performance Data DK-, GK-Steam Coils Figure 5. DK, GK Steam coils performance data Size 075 Unit Size 100 Unit Size 125 Unit Size 150 Unit Size 200 Unit Note: Steam pressure below 8 psi is not recommended.
UV-PRC004-EN.book Page 35 Monday, February 4, 2013 11:01 AM Performance Data Electrical Table 22. Minimum Circuit Ampacity (MCA) for standard and high static motors (115 V) Unit Size 75 100 120 150 200 HP 1 1 1 1 1 Amps 16.25 16.25 16.25 16.25 16.25 Table 23. Minimum Circuit Ampacity (MCA) for electric heat coils with standard motors Unit Size 75 100 120 150 200 75 100 120 150 200 75 100 120 150 200 No. of Elem 3 4 6 Coil kW 5.85 7.8 9.75 11.4 11.4 7.8 10.4 13 15.2 15.2 11.7 15.6 19.5 22.8 22.
UV-PRC004-EN.book Page 36 Monday, February 4, 2013 11:01 AM Performance Data Electrical Minimum Circuit Ampacity (MCA) and Maximum Fuse Size (MFS) Calculations for Unit Ventilators with Electric Heat (Single Phase) Heater Amps = (Heater kW x 1000)/Heater Voltage Note: Use 120 V heater voltage for 115 V units. Use 240 V heater voltage for 230V units. MCA = 1.25 x (heater amps + all motor FLAs) MFS or HACR Type Circuit Breaker = (2.
UV-PRC004-EN.book Page 37 Monday, February 4, 2013 11:01 AM Performance Data Glycol Correction Factors Glycol in an HVAC System Because the detrimental effects of glycol are lower at high temperatures, little concern is given to capacity loss or increased pump power when glycol is added to heating systems. This is why it is not uncommon to see glycol percentages up to 40 percent in the heating loop of a system. However, the same is not true for cooling systems.
UV-PRC004-EN.book Page 38 Monday, February 4, 2013 11:01 AM Performance Data Acoustical Table 28 reflects sound power ratings for the horizontal classroom unit ventilator. To calculate the noise criteria (NC) for a unit, subtract the actual room effect from the sound power number in each octave band. These numbers may be graphed on a NC chart. Note: Because room affects vary greatly, request exact numbers per the specific job from the design engineer.
UV-PRC004-EN.book Page 39 Monday, February 4, 2013 11:01 AM Piping Factory Installed Piping Packages Trane’s factory mounts piping packages for hydronic specified coils when Tracer™ ZN520, Tracer UC400, or CSTI controls are designated. Note: Valves for steam coils are not factory piped. Piping packages are available in either 2-way, or 3-way configurations. The 3-point floating valve is piped on the return side of the coil. Piping packages are factory leak tested to 300 psig to ensure joint integrity.
UV-PRC004-EN.book Page 40 Monday, February 4, 2013 11:01 AM Controls Why Trane Controls? Whether involved in a retrofit or in new construction applications, Trane has the control design to fit the systems requirements. The broad range of control packages offer a range from a field convertible end-device package, to a complete building automation system solution with LonTalk® controls.
UV-PRC004-EN.book Page 41 Monday, February 4, 2013 11:01 AM Controls ECM Engine Controller ECM Engine Controller The Electronically Commutated Motor (ECM) engine controls and reports the performance of up to two Trane Brushless DC (BLDC) motors. Figure 6. ECM engine controller • The engine also coordinates the operation of the fan in response to electric heat behavior and electric behavior in response to hydronic heat behavior.
UV-PRC004-EN.book Page 42 Monday, February 4, 2013 11:01 AM Controls Unit-Mounted Speed Switch Unit-Mounted Speed Switch Figure 8. Fan speed switch Figure 9.
UV-PRC004-EN.book Page 43 Monday, February 4, 2013 11:01 AM Controls Unit-Mounted Speed Switch The adapter allows direct customer interfacing through the use of terminal strips.
UV-PRC004-EN.book Page 44 Monday, February 4, 2013 11:01 AM Controls CSTI Customer Supplied Terminal Interface (CSTI) Figure 10. CSTI adapter board Customer Low-Voltage Interface for Valves, Electric Heat, Dampers, Fan Speeds, Variable Fan Speed, and 24 Vac Supply Valve(s), Electric Heat, and Changeover Configuration Switches (Factory-Set) Figure 11. CSTI adapter board field connections 3 2 1 13 12 11 10 9 8 7 6 5 4 3 2 1 1. VSP 10V 2. VSP 0–10V 3. VSP DC COM 1. 24 Vac Y (hot) 2.
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UV-PRC004-EN.book Page 46 Monday, February 4, 2013 11:01 AM Controls Tracer ZN520 Figure 13. Tracer ZN520 system Two Systems in One In an ICS environment, the Tracer ZN520 is pre-designed to install quickly and easily into the system. Since the controller and the unit are factory tested and commissioned, the start-up time for the entire system is minimized. Trane becomes the single source of responsibility for the equipment, unit controls, and building automation system.
UV-PRC004-EN.book Page 47 Monday, February 4, 2013 11:01 AM Controls Tracer ZN520 • Force the water valve(s) open to balance the hydronic system during installation set-up or service. Filter Maintenance. Filter status for the controller is based on the cumulative run hours of the unit fan. The controller compares the amount of fan run time against an adjustable fan run hour (stored in the controller) to determine when maintenance is recommended for the unit.
UV-PRC004-EN.book Page 48 Monday, February 4, 2013 11:01 AM Controls Tracer ZN520 3. When in the unoccupied mode the Tracer ZN520 has an adjustable freeze avoidance setpoint. If the outside air temperature is below the setpoint the unit will open the valves to allow water to flow through the coils. Interoperability. Interoperability allows the owner freedom to select multiple vendors, and multiple products.
UV-PRC004-EN.book Page 49 Monday, February 4, 2013 11:01 AM Controls Tracer UC400 Tracer UC400 Figure 15. The Tracer UC400 controller delivers single zone VAV control and can be used in a stand-alone application or as part of a Trane Integrated Comfort System (ICS). In the stand-alone configuration, Tracer UC400 receives operation commands from the zone sensor and/or the auto changeover sensor (on auto changeover units).
UV-PRC004-EN.book Page 50 Monday, February 4, 2013 11:01 AM Controls Tracer UC400 a later date. Once power is applied to the controller, it will automatically start up and run based upon the setpoint on the local zone sensor. An individual time clock can be added to the unit for local scheduling. The Tracer UC400 is BTL listed as B-ASC profile. This ensures the controller to be used with other BACnet® building automation systems.
UV-PRC004-EN.book Page 51 Monday, February 4, 2013 11:01 AM Controls Zone Sensors 2. An analog discharge air sensor monitors the temperature of the air coming off of the coil and if the temperature falls below 40°F the outside air damper is closed, the fan is turned off and the valves are fully opened. 3. When in the unoccupied mode, the controller has an adjustable freeze avoidance setpoint.
UV-PRC004-EN.book Page 52 Monday, February 4, 2013 11:01 AM Controls Zone Sensors Figure 21. Split mtd zone sensor, unit mtd fan speed switch, and wall mtd setpoint dial with On/Cancel Digit 19 = P X13511527-01 (wall) X13790849-01 (unit) X13651467-02 (comm) Figure 23. Wall mtd temp sensor (SP, OALMH, COMM) Digit 19 = K X13790841-01 (wall) X13651467-02 (comm) 52 Figure 22.
UV-PRC004-EN.book Page 53 Monday, February 4, 2013 11:01 AM Controls Actuators Table 33.
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UV-PRC004-EN.book Page 61 Monday, February 4, 2013 11:01 AM Mechanical Specifications General Deliver and install a complete unit ventilator certified for ventilation at AHRI-840, or tested by an independent testing and balancing lab witnessed by owner’s representative. All non-AHRI manufacturers shall be within 10 percent of catalog airflow and capacities, or removal of these units from the jobsite may be required at the expense of the manufacturer or contractor.
UV-PRC004-EN.book Page 62 Monday, February 4, 2013 11:01 AM Mechanical Specifications lessen the acoustics due to sudden speed changes. Motors can be operated at three speeds or with a field-supplied variable speed controller. The motor will choose the highest speed if there are simultaneous/conflicting speed requests. All motors have integral thermal overload protection with a maximum ambient operating temperature of 104°F and are permanently lubricated.
UV-PRC004-EN.book Page 63 Monday, February 4, 2013 11:01 AM Mechanical Specifications Outside Air/Return Air Damper Each unit ventilator design results in a fixed air, compressible seal to ensure proper modulation and mixing of the return and outdoor air. The damper is capable of varying proportion of mixed air from 100 percent room air to 100 percent outside air. Face and Bypass Damper (option) Face and bypass damper control is provided on the unit ventilator.
UV-PRC004-EN.book Page 64 Monday, February 4, 2013 11:01 AM Mechanical Specifications service tool connection. Wireless temperature sensors, which provide easy and flexible installation, are a cost-effective alternative to wired sensors. Some additional options available with the sensors include: • Easy-to-use display interface for clear and simple monitoring and control. • Temperature setpoint control to allow the tenant to choose a temperature setpoint that satisfies their personal preference.
UV-PRC004-EN.book Page 65 Monday, February 4, 2013 11:01 AM Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com.
