User manual HONEYWELL W7751H3007

[. . . ] Excel 10 W7751H3007 VAV ACTUATORS HONEYWELL EXCEL 5000 OPEN SYSTEM INSTALLATION INSTRUCTIONS BEFORE INSTALLATION The W7751H Smart VAV Actuator consists of a factorycombined variable air volume (VAV) box controller and a direct-coupled damper actuator with de-clutch mechanism. The actuator/controller assembly is field-mounted to the VAV box damper shaft similar to the mounting of a standard actuator, and the controller wiring is terminated to the screw terminals accessible inside the detachable wiring box. The W7751H's built-in actuator with de-clutch mechanism allows the installer to manually open or close its built-in VAV box damper without power or software tool. The W7751H contains a Free Topology Transceiver (FTT) LonMark® compliant controller containing a Microbridge flowthrough pressure sensor and communicates via the 78 kbaud LONWORKS® Network. [. . . ] Always pull straight away from the connector; never remove by pulling at an angle. 24 VAC 50/60 Hz COM W7751H 123 Wiring All wiring must comply with applicable electrical codes and ordinances, or as specified on installation wiring diagrams. NOTES: · 24 Vac power connections. Verify that multiple controllers powered by the same transformer are wired with the transformer secondary connected to the same input terminal numbers on each W7751. 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. For power wiring recommendations, refer to Excel 10 W7751B, D, F, H, J Variable Air Volume Controller ­ Application Guide (Product Literature No. : 74-2949). In the case of multiple W7751H units operating from a single transformer, the same side of the transformer secondary must be connected to the same input terminal in each W7751H and the ground terminals (terminal 3 of the W7751H) must be connected to a verified earth ground for each controller in the group. 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. For power wiring recommendations, refer to Excel 10 W7751B, D, F, H, J Variable Air Volume Controller ­ Application Guide (Product Literature No. : 742949). All loads on a W7751H must be powered by the same transformer that powers the W7751H. Keep the earth ground connection (terminal 3) wire run as short as possible. Do not connect the analog ground (terminal 5) to the earth ground. Earth grounding Power The 24 Vac power from an energy-limited Class II Power Source must be provided to each W7751H. To conform to Class II restrictions, transformers must not be larger than 100 VA. IMPORTANT Power must be OFF prior to connecting to or disconnecting from output terminals 9 and 10. Use the heaviest gauge wire available, up to 2. 0 mm2 with a minimum of 1. 0 mm2, for all power and earth ground wiring. For non-plenum, open areas, run cables exposed (or in conduit, if required). · 32 W7751D, F 24V COM 24V COM 28 W7751B W7751H 1234 9 10 123 · · · 24 VAC 50/60 Hz IF THE W7751H IS USED IN UL 1995 EQUIPMENT AND THE PRIMARY POWER IS MORE THAN 150 V, GROUND ONE SIDE OF TRANSFORMER SECONDARY. Fig. Power wiring for multiple controllers NOTES: W7751H W7751H W7751H 12 24 VAC 50/60 Hz COM 12 12 X W7751H · · Unswitched 24 Vac power wiring can be run in the same conduit as the LONWORKS® network cable. Maintain a 76-mm separation between triac outputs and LONWORKS® network wiring throughout the installation. 12 Communications See Chapter "LonWorks System Engineering" of Excel 50/500 LonWorks Mechanisms ­ Interface Description (Product Literature No. : EN0B-0270GE51) for a complete description of LONWORKS® network topology rules. Approved cable types for LONWORKS® network communications wiring is Level IV 0. 34 mm2 plenum or non-plenum rated unshielded, twisted pair, solid conductor wire. For non-plenum areas, US part AK3781 (one pair) or US part AK3782 (two pair) can be uses. In plenum areas, US part AK3791 (one pair) or US part AK3792 (two pair) can be used. Communications wiring can be run in a conduit, if needed, with non-switched 24 Vac or sensor wiring. [. . . ] 2) provides a visual indication of the status of the device. When the W7751H receives power, the LED appears in one of the following allowable states: 1. Continuous ON = processor is in initialized state. Fast blink = the W7751H has an alarm condition. [. . . ]