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Installation
Owner
Diagnostics
®
Tracer ZN.520 for Classroom
Unit Ventilator
UV-SVP01A-EN
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Start-up Procedures Installation of New Units 1. Follow all instruction for installation of classroom unit ventilators as detailed in UV- IOM-1 (Installation Operation Maintenance manual). 2. Disconnect power or disable the circuit breaker to unit. 3. Run communication link wire when required. (See wiring diagram in the unit). 4. Install zone sensor when required. (See wiring diagram in the unit and zone sensor submittals). 5. Reapply power. 6. Check for GREEN Status LED operation to e
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Start-up Procedures Power Up Sequence Manual output test can be initiated at any time in the power up se- quence or during normal opera- tion. When 24 VAC power is initially ap- plied to the controller, the follow- ing sequence occurs: 1. Green Status LED turns on. 2. All outputs are controlled Off. 3. The controller reads input val- ues to determine initial values. 4. Standalone control is assumed unless occupancy data is com- municated. 5. Random start timer expires (5 to 30 seconds, random
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General Information ® Tracer ZN.520 Overview ® ® The Trane Tracer ZN.520 con- troller is a factory-installed and commissioned, direct-digital controller (DDC) offering for classroom unit ventilator sys- tems. (See Figure 1: “Tracer ZN.520 Control Board”) The Trac- er ZN.520 can also be applied to ® other Trane interoperable HVAC equipment, including the fan coil and blower coil products. (For more information see,Table 1: Tracer™ ZN.520 Unit Controller features and coil availability,
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General Information Table 1: Tracer™ ZN.520 Unit Controller features and coil availability Entering Auto Face and Multiple Dehumid- Valve Economizer Auxiliary Water Coil Damper Bypass 2 Fan Speeds ification Control Damper Heat Temperature Adjust Damper Sampling 2-pipe changeover X X X X X X X 2-pipe hot water X X X X X X only 2-pipe steam only X X X X X 2-pipe changeover/ X X X X X X X electric heat 2-pipe cool only X X X X 2-pipe cool only/ 1 1 X X X X X electric heat 4-pipe hot water/ 3
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Controller Circuit Board Features Power Generic Auto Test Button Status LED Communications LED Service Button and LED Communications Zone Sensor Connections Figure 2: Tracer ZN.520 unit controller circuit board UV-SVP01A-EN 9
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Controller Features Each Tracer ZN.520 unit controller The zone sensor may also be used Service circuit board is equipped with en- when trying to locate a unit. By hancements to help facilitate ser- The Trane Tracer ZN.520 unit con- pressing the ON button on the zone ® vice, testing, and diagnosis. troller is serviced using Rover , the sensor for 5 seconds or using the ICS software service too. Rover is “wink” command in Rover, the cir- Each board has designed to support the Tracer cuit boar
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Communication Configurations Note: The Tracer ZN.520 is a connect to a maximum of 120 The ICS system also allows all of configured controller. It will Tracer ZN.520 controllers. the classroom unit ventilators to not operate without a valid share information without the downloaded configuration presence of hardwired sensors at file. each unit. Some typical shared points include outside air temper- The Tracer ZN.520 controller sup- ature, entering water temperature, ports ICS and peer-to-pee
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Communication Configurations A personal computer running Rov- Stand-Alone Communication Interface er may be directly connected to a In a stand-alone configuration, Important! To help ensure standalone Tracer ZN.520; con- commands for operation are deter- optimal performance of the nected to the communications jack mined based on input from the Rover service tool, please use in the Trane zone sensor; or con- zone sensor, humidity sensor, and the latest version. To obtain nected to a communicati
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Standard End Devices Table 2: End Device Specifications Device Characteristic Description Fan Status Switch Material Contact Blade—Pilot duty rated Operating Temperature Range -40°F/250°F (-40°C/120°C) Contact Form SPST-NO Preset Fan status - 0.07” Low Temperature Detection Switch (Freezestat) 36°F ± 2°F Trip Temperature: (2°C + - 1.11°C) 44°F ± 3°F Release Temperature (6.67°C + - 1.67°C) Pilot Duty 120 VAC 240 VAC (24 VAC) FLA 10.0 5.0 Rating—Auto Reset LRA 60.0 30.0 OutsideAir Senso
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Standard End Devices Table 2: End Device Specifications Device Characteristic Description Outside Air Actuator Description Three-point floating with spring return Ambient Temperature Rating -25°F to 125°F Power Consumption 5 VA Torque 35 in-lbs. Drive Time 90 seconds, 95 degree stroke Face and Bypass Actuator Description Three-point floating Ambient Temperature Rating 32°F to 122°F Power Consumption 3 VA Torque 35 in-lbs. Drive Time 80-110 seconds, 95 degree stroke 2-way Control Valve Descr
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Standard End Devices Table 2: End Device Specifications Device Characteristic Description 3-way Control Valve Description Three-point modulating Ambient Temperature Rating 140°F at 95% relative humidity Drive Time 50 seconds Max Pressure 400 psi water Close Off Varied by size and Cv Temperature Water 200°F maximum Time clock Size 2.83'' x 4.0'' x 2.06'' Power Consumption 4.4 VA Switch SPDT dry contacts, silver cadmium oxide Switch Rating 16A 250V resistive, 1000 Watts tungsten Minimum Switchi
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Standard End Devices Table 2: End Device Specifications Device Characteristic Description Humidity Sensor Sensing Element Polymer capacitive Sensing Element Accuracy: ± 5% over 20-95% RH @ 77ºF Range 0 to 99% RH Operating Temperature Range 0°F to 140ºF Max Supply Voltage 24VDC Output Characteristics 4 to 20 MA for 0-100% RH Drift Rate Less than 1% per year CO Sensor Sensing Element Accuracy: ± 100ppm full scale 2 Range 0-2000 ppm Operating Temperature Range 59°F to 95ºF Supply Voltage 24VAC Outp
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Standard End Devices Table 2: End Device Specifications Device Characteristic Description Type N.E.C. Class 2 Primary Voltage 120 vac Control Transformer 24 vac at 90 va Secondary voltage Manual reset 4amp fuse in 24-volt circuit UV-SVP01A-EN 17
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Installation and Wiring Specifications Dimensions Tracer ZN.520 board and mounting hardware: • Height: 5.25 inches (133 mm.) • Width: 5.50 inches (140 mm) • Depth: 2.25 inches (57 mm) Power Requirements • 18 to 32 VAC (24 VAC nominal) • 50 or 60 Hz • 570 mA AC Operating Environment • 32° to 140°F (0× to 60°C) • 5% to 95% relative humidity, non-condensing Storage Environment • -40° to 185°F (-40° to 85°C) • 5% to 95% relative humidity, non-condensing Agency Listings • UL and CUL 916 Energy Man
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Installation and Wiring Binary Inputs Each binary input associates an in- put signal of 0 VAC with open con- tacts and 24 VAC with closed contacts. Table 3: Binary inputs (typically 24 mA AC) Description Terminals Terminal Function Binary input 1 J2-1 24 VAC (BI 1) J2-2 Input Binary input 2 J2-3 24 VAC (BI 2) J2-4 Input Binary input 3 J2-5 24 VAC (BI 3) J2-6 Input Binary input 4 J2-7 24 VAC (BI 4) J2-8 Input UV-SVP01A-EN 19
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Installation and Wiring Binary Outputs Outputs are load side switching tri- acs. The triac acts as a switch, ei- ther making or breaking the circuit between the load (valve, damper, contactor, relay) and ground. Table 4: Binary outputs Output Description Terminals Load Energized Load De-energized Rating 1 VAC RMS 24 VAC RMS Fan high J1-1 12 VA (typical) (typical) Fan medium, 1 VAC RMS 24 VAC RMS J1-2 12 VA Exhaust fan (typical) (typical) 1 VAC RMS 24 VAC RMS Fan low J1-3 12 VA (typical) (t
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Installation and Wiring Analog Inputs Table 6: Analog inputs Description Terminals Function Range Zone TB3-1 Space temperature input 5° to 122°F (-15° to 50°C) Ground TB3-2 Analog ground NA Set TB3-3 Setpoint input 40 ° to 115 °F (4.4° to 46.1°C) Fan TB3-4 Fan switch input 4821 to 4919 Ω (Off) 2297 to 2342 Ω (Auto) 10593 to 10807 Ω (Low) 13177 to 13443 Ω (Medium) 15137 to 16463 Ω (High) Ground TB3-6 Analog ground NA Analog Input 1 J3-1 Entering water temperature -40° to 212°F (-40° to 100°C) J3-
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Installation and Wiring Mounting The Tracer ZN.520 circuit board is mounted in the left-hand end pock- et for all classroom unit ventilator configurations. The sheet metal mounting plate has raised emboss- es to accept the mounting feet on the circuit board. (See Figure 8: “Classroom unit ventilator control box with close-up of horseshoe embosses and circuit board mounting feet.”) This design al- lows the Tracer ZN.520 controller to be secured with a minimal num- ber of sheet metal scre
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Installation and Wiring The mounting position on the ver- The mounting plate on the hori- For additional convenience, quick tical classroom unit ventilator zontal classroom unit ventila- connects and modular wire har- configuration allows complete ac- tor configuration is designed to nesses are used on the control cess to the Tracer ZN.520 by re- slide out with the removal of a sin- board and mounting plate. (See moving the front panel. (See gle screw for complete access to Figure 11: “Quick
