User manual HONEYWELL W7751H3007

[. . . ] Avoid mounting the W7751H in areas where acid fumes or other corrosive vapors can attack the actuator's metal parts, or in areas where escaping gas or other explosive vapors are present. The W7751H actuator opens or closes a damper by driving the damper shaft in either the counterclockwise (CCW) or clockwise (CW) direction. If the W7751H is to be mounted directly onto a damper shaft, use the mounting bracket and screw included in the delivery. The wiring of the W7751H controller is terminated to a screw terminal block accessible inside the detachable wiring box. [. . . ] 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. 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. Wiring multiple W7751 units (with transformer secondary connected to same input terminal numbers) 5 EN1B-0279GE51 R0707B EXCEL 10 W7751H SMART VAV ACTUATOR Zone Manager, and each network segment can have a maximum of one repeater. Pull the cable to each device on the LONWORKS® network and connect to communication terminals 11 and 12 of the W7751H. Fig. NOTE: Ensure that the wall module's Configuration DIP Switch is set as shown in Fig. Switches 1 through 3 set the timing of the valve actuator to match the W7751H outputs (minimum of 0. 1 s, with a max. Use the heaviest gauge wire available, up to 14 AWG (2. 0 mm2), with a minimum of 18 AWG (1. 0 mm2). [. . . ] Observe the actuator's operation; if the damper is closed, it should begin to open. If no movement is observed, check to see if 24 Vac is present at the W7751H. With proper wiring, with 24 Vac present, and with proper commands from the LNS plug-in, the actuator should operate properly. Table 1. Internal end switches of SSW2 terminal S1 S2 / S3 type of switch common lead for switches A and B change-over switch A (S1/S2 opens and S1/S3 closes when shaft adapter moves CW past 5°; reverts to original state when shaft adapter moves CCW past 5°). [. . . ]