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Installation and
Operation
™
Tracer ZN521
Zone Controller
CNT-SVX07C-EN
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Installation and Operation ™ Tracer ZN521 Zone Controller CNT-SVX07C-EN April 2005
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CNT-SVX07C-EN
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Tracer ZN521 Zone Controller Installation and Operation This guide and the information in it are the property of American Standard Inc. and may not be used or reproduced in whole or in part, without the written permission of American Standard Inc. Trane, a business of American Standard, Inc., has a policy of continuous product and product data improvement and reserves the right to change design and specification without notice. Although Trane has tested the hardware and software described in t
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NOTICE: Warnings and Cautions appear at appropriate sections throughout this manual. Read these carefully: WARNING Indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury. CAUTION Indicates a potentially hazardous situation, which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices. CAUTION Indicates a situation that may result in equipment damage or property damage. The following fo
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Contents Chapter 1 Overview and specifications . . . . . . . . . . . . . . . . . . 1 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Storage environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Analog inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 GND: Ground terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 ZN: Zone temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 SET: Local setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 FAN: Fan mode input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Modulating outdoor/return air dampers. . . . . . . . . . . . . . . . . . . . . . . . . 43 ASHRAE Cycle 1 conformance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 ASHRAE Cycle 2 conformance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Economizing (free cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Two-position control of a modulating outdoor air damper . . . . . . . . . 46 Face-and-bypass damper operation . . . . . . . . . . .
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Contents Chapter 7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 iv CNT-SVX07C-EN
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Chapter 1 Overview and specifications This guide provides installation and configuration information for the Tracer ZN521 zone controller, as well as a description of its operations. The overview includes a product description, specifications, and descrip- tions of ancillary products that may be necessary. Product description The Tracer ZN521 is an application-specific controller that provides direct-digital zone temperature control. The controller can operate as a stand-alone device or as p
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Chapter 1 Overview and specifications Storage environment If a Tracer ZN521 zone controller is to be stored for a substantial amount of time, store it in an indoor environment that meets the following requirements: • Temperature: –40° to 185°F (–40° to 85°C) Relative humidity: 5–95%, noncondensing Dimensions Plastic-cover model dimensions For complete dimensional drawing, see Figure 1 on page 3. • Height: 5.375 in. (137 mm) • Width: 6.875 in. (175 mm) • Depth: 2 in. (51 mm) Metal-cover model
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Clearances Figure 1. Plastic-cover model dimensions and clearances 1 in (25 mm) 4 in 4 in. (102 mm) (102 mm) 4 in (102 mm) 5.625 in. 6.875 in 6.31 (143 mm) (175 mm) (160 mm) 5.625 in (143 mm) 2 in. (51 mm) 1 in (25 mm) Figure 2. Metal-cover model dimensions and clearances 1 in. (25 mm) 1.875 in. (48 mm) 6.5 in. (165 mm) 0.28 in. (7 mm) 9 in. (229 mm) 9 in. 7 in. (229 mm) (178 mm) 2 in. 2 in. (51 mm) (51 mm) 24 in. 10.37 in. 1 in. (610 mm) (263 mm) (25 mm) width with cover 10.25 in. 2.25in. Clea
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Chapter 1 Overview and specifications Agency listing/compliance CE—Immunity: EN 50082-1:1997; EN 50082-2:1995 CE—Emissions: EN 50081-1:1992 (CISPR 22) Class B UL and C-UL 916 listed: Energy management system UL 94-5V (UL flammability rating for plenum use) FCC Part 15, Class A ASHRAE Cycle 1 & Cycle 2 control sequences Additional components The Tracer ZN521 zone controller requires the use of additional compo- nents for monitoring and proper control of the associated equipment. The use of speci
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Additional components Table 1. Tracer zone temperature sensor options Timed Fan Zone override buttons BAS Comm order Use jack number Setpoint Temperature High Med Low Auto Off thumb- On Cancel sensor wheel 4190 1087 Any x 4190 1088 Any x x x x 4190 1090 Any x x x x x 4190 1094 Any x x x 4190 1095 Unit xx x x x x x x ventilator 4190 1115 Fan coil x x x x x x x x x x 4190 1116 Unit xxxx x x x x x ventilator 4190 1117 Any x x x x x x x returns the valve to normally open or closed (dependent o
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Chapter 1 Overview and specifications 6 CNT-SVX07C-EN
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Chapter 2 General wiring information This chapter provides specifications and general information about wir- ing the Tracer ZN521 zone controller. The controller requires wiring for: • Input/output terminals • AC power to the controller • Communication-link wiring, if the controller is to communicate with a building automation system (BAS) Input/output terminal wiring All input/output terminal wiring for the Tracer ZN521 zone controller is application specific and dependant on the configuratio
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Chapter 2 General wiring information CAUTION Complete input/output wiring before applying power to the Tracer ZN521 zone controller. Failure to do so may cause damage to the con- troller or power transformer due to inadvertent connections to power circuits. IMPORTANT Do not share 24 Vac between controllers. All wiring must comply with National Electrical Code and local codes. The ac-power connections are in the top left corner of the Tracer ZN521 zone controller (see Figure 3). Figure 3. Conn
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Communication-link wiring and addressing Communication-link wiring and addressing The Tracer ZN521 zone controller communicates with the BAS and with other LonTalk controllers by means of a LonTalk communication link. IMPORTANT For important instructions on network wiring, refer to the Tracer Sum- mit Hardware and Software Installation guide (BMTX-SVN01A-EN). Wiring for the communication link must meet the following require- ments: • All wiring must comply with the National Electrical Code and
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Chapter 2 General wiring information 10 CNT-SVX07C-EN
