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Honeywell
W7620 SINGLE ZONE CONTROL SYSTEM
PROVIDES CUSTOMIZED CONTROL OF HVAC
SINGLE ZONE EQUIPMENT. SPECIFIC
FEATURES THIS SYSTEM OFFERS INCLUDE:
COMMUNICATION, APPLICATION FLEXIBILITY,
DIRECT DIGITAL CONTROL, EASY
INSTALLATION AND PROGRAMMING, AND
INCREASED EQUIPMENT RELIABILITY.
0 W7620 Base Controller provides:
- four relay outputs
- network communication
- T7660 Space Temperature Sensor inputs
0 W7621 Expansion Input Point Boards provide ad-
ditional input point expansion on one board of u
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SYSTEM DESCRIPTION . . . ; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 INST~LATION........,..1.......................................... 7 CHE CKO UT . . . . . . . . . . . . . ..1............~...........................11 SPECIFICATIONS. . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 ACCESSORIES . . . . . . . . . . . . ..‘.......................................lS WHEN PURCHASING REPLACEMENT AND
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the RS-485 CNAP network. The CNAP network enables The W7620 Single Zone Control System is Honeywell’s communication to multiple W7620 Zone Controllers as new li ne of single zone control products. The W7620, well as to other controllers, such as the W7600 Control can conveniently monitor and control individual HVAC Module, 47640 NIU or a Q7650 PC Interface Card in zone equipment. a PC with ZM7603 Remote Monitoring software. Refer System features include CNAP (Control Network to the ZM7601 Config
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Figure 1 - CNAP Network Diagram
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The W7622 output board has a selection of outputs The S7610 POT is a hand-held &vice that provides a depending on the model number. One output board of means to set, test, and monitor point and parameter values. any type can be added to the W7620 Zone Controller. The POT utilizes the RS-485 CNAP nehvork for communication and connects to the controller through a The W7622 drives any output (for heat, cool, etc.), either cable to an RJ11 jack at the T7660 Zone Temperature digital or analog. Functi
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Figure 3 -POT (Portable Operator’s Terminal)
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When installing this product . . . 1. Read these instructions carefully. Failure to follo them could damage the product or cause a surface-before removing the W7621 or W7622 hazardous condition. expansion board from the antistatic bag. 2. Check the ratings given in the SPECIFICATION: Failure to do so might damage the board. section and on the product to make sure that the I I product is suitable for the application. 3. The installer must be a trained, experienced service or installation technici
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,&Knockout for l/2 in. conduit fittings. h Double knockout for l/2 or 3/4 in. conduit fittings. Figure 4 - W7620 Mounting 10 PIN CONNECTOR STANDOFF HOLE PLASTIC STANDOFF Figure 5 -Mounting Additional Board 8
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r Pull the pair of CNAP communication cables to each If securing screws are not used, the controller on the network and connect to the screw expansion board will not be grounded. This terminals marked CNAP +/- (Figure 6). will result in improper operation or damage to the device. I I NOTE I NOTE I Power Wire Lengths 1. Power requircmcnts limit 24 Vac power transmission distance. The following data can be The W7620 Single Zone Application Guide, Form used in calculating load versus wire length: 6
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3. Observe the fan or measure the output. If the T and Al). See the T7660 Space Temperature expected result is not achieved, measure the Sensor specification sheet, Form 63-4219, for the correct temperature to me as ure resistance value resistance across the correct terminals (e.g., OUT1 A and C). The resistance should hold at cross-reference. approximately 1.0 when the output is ON. 4. If long sensor wiring is used, m- resistance supplied to the W7620 by both the temperature sensor and the lead
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The following steps for complete checkout and testing of a W7620 are described fully below. The procedures are as follows: Testing physical points requires either the actual sensor be at a known val ue or digital state, or that a simulated 1. Check W7620 installation and wiring, including known value or digital state be applied to the input point power to the W7620. terminals. In the case of physical output points, the output 2. Start-up W7620 (connect S7610 POT or condition of the controlled eq
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Connect the ground wire to the gr ee n ground screw on the W7620 chassis. See Figure 7. or removing connections from Terminals TR and TR earth-ground. 2. To disable a controller, remove both legs of I the AC power. Removing only one leg may connect the same side of the prevent other controllers on the same transformer secondary to the same terminal transformer from communicating on the number on each W7620. CNAP network. I L 2. Grounded Transformer Secondaries: If the Transformer has a grounded
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Electrical Ratings Supply Voltage 20 -3 0 Vac, 50 or 60 HZ maximum at 30 Vac, 50 or 60 HZ System Current Draw 8.5 VA Inputs: Resistive 29104370 ohm (-40 to 265°F temperature range with platinum sensors) Voltage 0-10 Vdc with 2 Vdc overrange Digital j External contact (switch, relay or transistor) Into 15 Vdc, 15 AC Input Up to three 24 Vac source indicating digital response to call from same transformer, All three Inputs can be used separately or together to determine the final state of input.
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bl Knockout for l/2 in. conduit fittings. Q Double knockout for 1 /2 or 3/4 in. conduit fittings. Figure 8 - W7620 Dimensions 14 63-4224
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Base Unit (with cover) Input Expansion Boards Use with W7459 Economizer Logic Module, modulating spring Damper Actuator
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Canadian EMI This digital apparatus does not exceed the Class A Le prdsent apparelI “wn&-lque “&net pas de btults rad4c&ctiques depassant les llmltes appllcables BUX limits for radio noise emission fmm digital apparatus set out I” the Radio I- Regulations Of the apparelIs nutirlques de la Classe A praadtes dens Canadian Department of Communications. le R@lament SW le bmufllege radl,Mktrlqua Bdlctd !aar 18 mlnlstBr@ des Communlcstions du Canada. Please send your comments and suggestions to: Dear
