User manual HONEYWELL W7750B

[. . . ] 2 for mounting dimensions. )LJ :$% PRXQWLQJ GLPHQVLRQV LQ LQ PP The controller enclosure on the W7750A, B is constructed of a sheet metal housing and a plastic factory-snap-on cover. The controller mounts using two screws inserted through the plastic cover. Ventilation openings were designed into the cover to allow proper heat dissipation regardless of the mounting orientation. 3. 95-75211 2 (;&(/ :$% &2167$17 92/80( $+8 &21752//(5 )LJ :$% ', 1 UDLO PRXQWLQJ :LULQJ All wiring must comply with applicable electrical codes and ordinances or as specified on installation wiring diagrams. [. . . ] Communications wiring can be run in a conduit, if needed, with QRQVZLWFKHG 24 Vac or sensor wiring. If a longer E-Bus network is required, a Q7740A 2-way or Q7740B 4-way repeater can be added to extend the length of the E-Bus. A Q7751A Router can be added to partition the system into two segments and effectively double the length of the E-Bus. Only one router is allowed with each Excel 10 Zone Manager, and each network segment can have a maximum of one repeater. Pull the cable to each controller on the E-Bus and connect to communication terminals 14 and 15 (W7750A, B). 5 95-75211 (;&(/ :$% &2167$17 92/80( $+8 &21752//(5 )LJ 7HUPLQDWLRQ PRGXOHV NOTE: When attaching two or more wires to the same terminal, other than 14 AWG (2. 0 mm2), be sure to twist them together. Insert the wire in the required terminal location and tighten the screw to complete the termination. If two or more wires are being inserted into one terminal location, twist the wires together a minimum of three turns before inserting them. (5 mm) before inserting them into the terminal and tightening the screw. Pull on each wire in all terminals to check for good mechanical connection. :LULQJ 'HWDLOV The W7750A Controller has the terminal arrangement shown in Fig. 9 through 15 illustrate W7750A, B Controller wiring for various configurations. Connection for operator access to the E-Bus is provided by plugging the Serial LonTalk Adapter (SLTA) connector into the E-Bus jack. NOTE: If an Excel 10 W7750A, B Controller or Zone Manager is not connected to a good earth ground, the controllers internal transient protection circuitry is compromised and the function of protecting the controller from noise and power line spikes cannot be fulfilled. This could result in a damaged circuit board and require replacement of the controller. Refer to installation diagrams for specific wiring. )LJ $WWDFKLQJ WZR RU PRUH ZLUHV DW WHUPLQDO EORFNV 95-75211 6 (;&(/ :$% &2167$17 92/80( $+8 &21752//(5 HEAT 1 HEAT 1 HEAT 2 COMP 1 COMP2 HEAT 2 COMP 1 COMP2 3 FAN LOAD AND CONTROLLER POWER 24 VAC FAN LOAD POWER C 24 VAC H CONTROLLER POWER 24 VAC LINE AC + - 31 W1 30 W2 29 Y1 28 Y2 27 G 26 25 24 Rc 23 Rh 22 VAC 24 21 VAC 24COM 20 19 18 17 16 NETWORK DO NOT USED + - 31 W1 30 W2 29 Y1 28 Y2 27 G 26 25 24 Rc 23 Rh 22 VAC 24 21 VAC 24 COM 20 19 18 17 16 NETWORK DO NOT USED W7750A CONSTANT VOLUME AHU CONTROLLER GROUND GROUND GROUND WALL MODULE SENSOR GROUND SET PT EARTH GROUND AI-1 OHM BYPASS LED NOT USED DI- 1 DI- 2 NOT USED SENSOR GROUND BYPASS SET PT EARTH GROUND DI- 1 DI- 2 2 1 TIME CLOCK E-BUS AI-1 OHM E-BUS 14 2 15 J3 1 2 3 4 5 6 7 8 9 10 11 12 13 DISCHARGE AIR TEMP 1 TIME CLOCK E-BUS 987654321 SENSOR BYPASS SET PT LED E-BUS GND E-BUS 2 JACK FOR E-BUS NETWORK ACCESS DISCHARGE AIR TEMP 987654321 2 JACK FOR E-BUS NETWORK ACCESS T7770C WALL MODULE 1 EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2. O MM2) WITH A MINIMUM OF 18 AWG (1. O MM2), FOR EARTH GROUND WIRE. TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK. SENSOR BYPASS SET PT LED E-BUS T7770C WALL MODULE 1 EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2. O MM2) WITH A MINIMUM OF 18 AWG (1. O MM2), FOR EARTH GROUND WIRE. If any wiring changes are required, ILUVW be sure to remove power from the controller EHIRUH starting work. Verify that multiple controllers being powered by the same transformer are wired with the transformer secondary connected to the same input terminal numbers on each W7750. (Controller configurations are not necessarily limited to three devices, but the total power draw, including accessories, cannot exceed 100 VA when powered by the same transformer (US only). See System Engineering form 74-2958 for power wiring recommendations. ) Controller wiring. Be sure that each controller is wired (terminal 1) to a verified earth ground using a wire run as short as possible with the heaviest gauge wire available, up to 14 AWG (2. 0 mm2) with a minimum of 18 AWG (1. 0 mm2) for each controller in the group. [. . . ] There are two methods of broadcasting the Service Message from an Excel 10 W7750 Controller. The other involves using the PC Configuration tool, as follows. When an $VVLJQ , ' command is issued from the commissioning tool, the node goes into the SERVICE_MESSAGE mode for five minutes. In the SERVICE_MESSAGE mode, pressing the occupancy override button on the remote wall module causes the Service Message to be broadcast on the network. If an Excel 10 W7750 Controller does not have an override button connected, it can still broadcast the Service Message on the network by temporarily shorting the controller Bypass Input terminal to the Sensor Ground terminal on the W7750A, B short terminals 3 and 5. 6WHS , 2 7HVWV The controller must be configured using the Excel 10 EVision PC configuration tool. [. . . ]