Honeywell W7751H Automobile Parts User Manual
Contents
1. add spacer between mounting tab and damper box housing See Fig 4 PULL TOP OF COVER OUT THEN DOWN FOR REMOVAL E a S CIRCUIT BOARD TERMINAL BLOCKS EXCEL 10 W7751H SMART VAV ACTUATOR MOUNTING TAB M10000 Fig 3 Cover removal and mounting tab terminal block access 4 2 1MM 1 32 IN 1 32 IN M20884 Fig 4 Mounting W7751H to VAV box damper housing when actuator is not parallel to VAV box damper housing Before mounting the W7751H onto the VAV box damper shaft determine the following 1 The damper shaft diameter 3 8 to 1 2 in 10 to 13 mm 2 Ifthe length of the VAV box damper shaft is less than 1 3 8 in 35 mm use the Short Shaft Adapter Kit not included part no 4074EVK 3 The direction the damper shaft rotates to open the damper CW or CCW see Fig 5 4 The damper opening angle 45 60 or 90 degrees TYPE ADAMPER AIR ze FLOW CW TO OPEN CCW TO CLOSE TYPE B DAMPER AIR FLOW a lt s A M2067B CCW TO OPEN CW TO CLOSE Fig 5 Determining rotation direction CW or CCW for damper opening If damper shaft diameter is 3 8 inch 10 mm round or square use part 201391 Shaft Adapter shipped with the W7751H Smart VAV Actuator Ensure it is placed opposite set screws See Fig 6 The adapter centers a 3 8 in 10 mm shaft in the hub Failure to use the adapter on a 3 8 in 10 mm shaf2. based on how long the bypass override button is depressed For example if the button is pressed for 6 sec the node sends the Service Pin Message AND the node enters Continuous Unocc mode To clear Continuous Unocc mode the button must be pressed momentarily 3 The following method is only supported on E Vision and LONSPEC a When an Assign ID command is issued from the Honeywell Software listed the node enters the SERVICE_MESSAGE mode for five minutes b In this mode pressing the bypass override button causes the Service Message to be broadcast on the network c All other functions are normal in this mode d If the bypass override button is not available short ing the controller Bypass Input terminals on W7751H short terminals 5 and 7 broadcasts the Service Message REHEAT VALVE ACTUATOR W7751H TRIAC NOT EARTH GROUND EQUIVALENT CIRCUIT 4 so clio Bl ln a N ks 2 Oo OUT 1 E E gt x o E BUS Lil ala s s vjo joju wes 24 VAC Alarms The commissioning tool is used to perform the ID Assignment task Once the ID Assignment and commissioning has been done check the controller status LED to determine if there are any alarms W7751 Controller Status LED The LED on the front of a W7751H Controller located just under the plastic cover provides a visual indication of the status of the device When the W7751H receives power the LED appears in one of the follo
3. EL 10 W7751H SMART VAV ACTUATOR SERIES OR PARALLEL FAN W7751H TRIAC EQUIVALENT CIRCUIT NOT EARTH GROUND ML7984B PWM VALVE ACTUATOR CONTACTOR 24 VAC Eu is spe 5 s v o ow pon PWM H 24 VAC PWM OUTPUT FROM CNTRL REHEAT VALVE ACTUATOR 24 VAC A MAKE SURE ALL TRANSFORMER POWER WIRING IS AS SHOWN REVERSING TERMINATIONS WILL RESULT IN EQUIPMENT MALFUNCTION A TO ASSURE PROPER ELECTRICAL CONTACT WIRES MUST BE TWISTED TOGETHER BEFORE INSERTING INTO THE TERMINAL BLOCK M10529 Fig 20 W7751H to PWM Valve Actuator and series or parallel fan W7751H NOT EARTH GROUND Pl TRIAC EQUIVALENT CIRCUIT MMC325 PNEUMATIC TRANSDUCER PNEUMATIC VALVE 24 VAC A REVERSE WIRES INCREASE DECREASE TO REVERSE ACTION DIRECT REVERSE A MAKE SURE ALL TRANSFORMER POWER WIRING IS AS SHOWN REVERSING TERMINATIONS WILL RESULT IN EQUIPMENT MALFUNCTION A OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER A USE 1 4 IN 6 MM MINIMUM PNEUMATIC TUBING BRANCH LINE MUST BE 6 FT 1 8M OR LONGER M10530 Fig 21 W7751H to pneumatic transducer 11 95 7553 04 EXCEL 10 W7751H SMART VAV ACTUATOR T7770C or D Wall Module Override LED The remote override LED located on either the T7770C or T7770D Wall Module will display the Manual Override mode of the controller The modes are 1 LED Off No override active 2 LED Continuo
4. Honeywell Excel 10 W7751H Smart VAV Actuator BEFORE INSTALLATION The W7751H Smart VAV Actuator is a factory combined Excel 10 Variable Air Volume VAV Box Controller and an ML6174 Direct Coupled 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 that are located under a snap on cover See Fig 1 The Smart VAV Actuator is a Free Topology Transceiver FTT LONMARK compliant controller The W7751H2025 is for smoke control use The ML6174 Direct Coupled Actuator with De clutch mechanism see Fig 2 for location allows the installer to manually open or close the VAV box damper connected to the W7751H without power or software tool to command it The controller in the W7751H contains a Microbridge flow through pressure sensor and communicates via the 78 kilobaud Echelon amp LONWoRKS Bus Network Triac output loads must draw a minimum current of 25 mA at 24 Vac 60 Hz nominal Triac maximum current rating 77 mA The actuator on the W7751H mounts directly onto the VAV box damper shaft and has up to 70 Ib in torque 8 Nm 90 degree stroke and 90 second timing at 60 Hz The actuator on the W7751H can accommodate the optional field installed auxiliary switches NOTE Mounting thermostat sensor greater than 20 ft from the W7751H2025 requires 14506944 001 Trans
5. NAL BLOCK M40525 Fig 16 W7751H modulating reheat valve wiring diagram For Note 2 instructions refer to Fig 15 95 7553 04 8 JACK FOR E BUS NETWORK ACCESS AIR FLOW DP PICKUP AIR FLOW DIRECTION W7751H MICROBRIDGE DP SENSOR TRIAC EQUIVALENT CIRCUIT NOT EARTH GROUND x GROUND OTE LOAD POWER WIRE IS CONNECTED TO TERMINAL 1 CONTACTORS 24 VAC ONLY LINE POWER A EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM USE THE HEAVIEST GAUGE WIRE AVAILABLE UP TO 14 AWG 2 0 MM 2 WITH A MINIMUM OF 18 AWG 1 0 MM2 FOR EARTH GROUND WIRE TO ASSURE PROPER ELECTRICAL CONTACT WIRES MUST BE TWISTED TOGETHER BEFORE INSERTING INTO THE TERMINAL BLOCK M10526 Fig 17 W7751H 2 stage reheat wiring diagram For Note 2 instructions refer to Fig 15 JACK FOR E BUS NETWORK ACCESS AIR FLOW DP PICKUP MICROBRIDGE W7751H DP SENSOR TRIAC EQUIVALENT CIRCUIT WIRED FOR MODULATING OR STAGED REHEAT SEE FIG 17 OR FIG 18 C7770A AIR TEMPERATURE SENSOR A EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM USE THE HEAVIEST GAUGE WIRE AVAILABLE UP TO 14 AWG 2 0 MM WITH A MINIMUM OF 18 AWG 1 0 MM FOR EARTH GROUND WIRE A TO ASSURE PROPER ELECTRICAL CONTACT WIRES MUST BE TWISTED TOGETHER BEFORE INSERTING INTO THE TERMINAL BLOCK A NOTE AIR TEMPERATU
6. RE SENSOR CANNOT BE USED WITH EITHER THE T7750B OR C WALL MODULE M10527A Fig 18 W7751H discharge air sensing For Note 2 instructions refer to Fig 15 EXCEL 10 W7751H SMART VAV ACTUATOR CHECKOUT W7751H Checkout Step 1 Wiring Connections Inspect all wiring connections at the W7751H and the T7770 terminals and verify compliance with installation diagrams If any wiring changes are required first be sure to remove power from the controller before starting work Pay particular attention to 24 Vac power connections Verify multiple controllers being powered by the same transformer are wired with the transformer secondary connected to the same input terminal numbers on each W7751 See Fig 10 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 See System Engineering form 74 2949 for power wiring recommendations Controller wiring Be sure that each controller is wired terminal 3 on the W7751H 28 on the W7751B and 32 on the W7751D F 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 mm with a minimum of 18 AWG 1 0 mm for each controller in the group See Fig 10 Verify Triac wiring to external devices uses the proper load power 24 Vac Hot terminal terminal 1 on the W7751H NOTE All wiring must comply wit
7. ation top view Align switch hub with actuator set screws Mount switch on actuator and tighten the three captive screws Connect controller with laptop PC To do this the controller on the W7751H must be wired powered and connected to the portable PC via the SLTA The SLTA connects to the controller on the W7751H via Network Access Jack on the T7770 Wall Module or by B Port on the Q7750A Zone Manager From E Vision Software drive the W7751H actuator and halt the motion at the desired position for switch operation NOTE When installed angular position indicator on the switch face moves from 90 to 0 degrees during CCW motion and from 0 to 90 degrees during CW motion Once finished programming disconnect the portable PC With a screwdriver move the cam inside the switch assembly to the appropriate position remembering cam travel direction for switching purposes see Fig 14 when turning switch on or off Monitor switch closure with ohmmeter for a continuity check Normally closed contact should measure zero ohms and normally open contact should measure infinite ohms when switch is not activated The opposite is true when switch is activated SWITCH CAMS M2076A Fig 14 Auxiliary switch cam adjustment NOTE For 2 or 3 switch models cams align with their respective switches and are individually set using the same procedure described above 6 Ensure switch activation at the desired degree of stroke by commandin
8. e way see Fig 11 with the switch contacts pointed to the top of the actuator 95 7553 04 EXCEL 10 W7751H SMART VAV ACTUATOR PROCEDURE W7751B 1 Determine desired switching action i e if switch GROUND GROUND GROUND TRANSFORMER 777 i EARTH A 1 GROUND 3 A IF THE W7751 CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE PRIMARY POWER IS MORE THAN 150 VOLTS GROUND ONE SIDE OF TRANSFORMER SECONDARY M10524A Fig 10 Power wiring for multiple controllers RANGE STOP PIN 201052 AUXILARY POINTED TOWARD SWITCH M10005 Fig 11 201052 Auxiliary Switch mounted on W7751H NOTES lfa range stop pin is used it must be pointing inward toward the shaft see Fig 11 to allow clearance for the auxiliary switch Each switch is independently adjustable in two degree increments to any point within the travel of the actuator Switches have a fixed differential of approximately three angular degrees 95 7553 04 6 energizing is to occur during CW or CCW rotation With Switch cam as shown in Fig 12 the normally closed contact opens in CCW rotation The normally open contact closes Conversely with switch cam as shown in Fig 13 the normally closed contact opens during CW rotation and the normally open contact closes COM NO NC T ccw C Fig 12 Switching configuration for CCW rotation top view COM NO NC L cw C Fig 13 Switching configuration for CW rot
9. g the actuator to both fully open and fully closed see step 3 NOTE Switches can also be preset prior to actuator installation if angular switch position is known Communications Refer to LONWORKS Bus Wiring Guidelines form 74 8565 for complete description of LONWORKS Bus network topology rules f If a longer LONWoRkKS Bus network is required a Q7740A 2 way or Q7740B 4 way Repeater can be added to extend LONWoRKS Bus length only if this is an Energy Management PAZX Bus IMPORTANT The Q7740A B Repeaters cannot be used in smoke control applications A Q7751A Router can only be added to an Energy Management Bus to partition system into two segments effectively doubling LONWoRKS Bus length Only one router is allowed with each Excel 10 Zone Manager or Excel 15 Building Manager and each network segment can have a maximum of one repeater Pull the cable to each device on the LONWORKS Bus and connect to communication terminals 11 and 12 W7751H IMPORTANT Screw type terminal blocks are designed to accept no more than one 14 AWG 2 0 mm conductor Multiple 14 AWG 2 0 mm wires can be connected with a wire nut Include a pigtail with this wire group and attach the pigtail to the individual terminal block Notes on LonWorks Bus Communications Wiring All field wiring must conform to local codes and ordinances or as specified on the installation drawings EXCEL 10 W7751H SMART VAV ACTUATOR Appro
10. h applicable electrical codes and ordinances Refer to installation diagrams for specific wiring Verify Termination Module Placement The installation wiring diagrams should indicate the locations for placement of Termination Module s Refer to the LoNWoRksQ Bus Wiring Guidelines form 74 2865 and the Excel 10 FTT Termination Module Installation Instructions form 95 7554 Correct placement of the termination module s is required for proper LONWORKS Bus communications Step 2 Startup Broadcasting the Service Message The Service Message allows a device on the LONWoRKS Bus to be positively identified The Service Message contains the controller neuron ID number and therefore can be used to confirm the physical location of a particular Excel 10 in building There are three methods of broadcasting the Service Message from an Excel 10 W7751H Controller 1 Physical service pin on controller a Remove the plastic cover and the white button is located next to the terminal strip b Momentarily pressing this service pin broadcasts the Service Message on the network 2 Using the wall module bypass pushbutton a By pressing the wall module bypass override button for more than four seconds the controller sends the Service Message b This functionality is supported in firmware version 1 2 15 or higher 95 7553 04 EXCEL 10 W7751H SMART VAV ACTUATOR NOTE During item 2 the occupancy override state of the controller changes
11. he damper shaft until the damper is open and release the lever When power is restored to the W7751H controller the controller synchronizes the damper actuator so that the damper is in the correct position upon startup When a range stop pin is used with a field added auxiliary Switch the tab on top of the range stop pin must point inward toward the VAV damper box shaft See Fig 11 This allows clearance for the auxiliary switch housing To remove the pin pry it up with a flathead screwdriver See Fig 8 IMPORTANT The minimum position set screw on the actuator is not available on the W7751H device SCREWDRIVER Fig 8 Lifting a range stop pin out of its slot Piping Air flow Pickup Connect the air flow pickup to the two connectors on the controller of the W7751H See Fig 9 AIRFLOW DP PICKUP AIRFLOW DIRECTION Honeywell M10003 Fig 9 Smart VAV Actuator air flow pickup connections NOTES Use 1 4 in 6 mm outside diameter with 0 040 in 1 mm wall thickness plenum rated 1219 FR 94V 2 pneumatic tubing Always use a fresh cut on the end of the tubing that connects to the air flow pickups and the connectors on the VAV controllers Connect the high pressure or upstream tube to the plastic restrictor labeled HI or P1 and the low pressure or downstream tube to the restrictor labeled LO or P2 See labeling in Fig 9 NOTES If controllers are mounted in unusually dusty or dirt
12. hten the Allen set screws The part no 201614 Range Stop Pin which is shipped with the W7751H Smart VAV Actuator is unnecessary When the W7751H closes the damper rotates CCW 90 degrees to fully close If the damper rotates clockwise CW to open and the angle of the damper open to closed is 45 or 60 degrees manually open the damper fully to the clockwise direction and mount the W7751H to the VAV damper box and shaft Tighten the Allen set screws Insert the part no 201614 Range Stop Pin which is shipped with the W7751H Smart VAV Actuator in either the 45 or 60 degree CCW slot whichever applies see Fig 7 The range stop pin must go all the way through the housing The pin can only be installed in the CCW slots when the actuator is in the CW position When the W7751H closes the damper rotates CCW either 45 or 60 degrees to fully close If the damper rotates counterclockwise CCW to open and the angle of the damper open to closed is 90 degrees manually close the damper fully to the clockwise direction and mount the W7751H to the damper box and shaft Tighten the Allen set screws The part no 201614 Range Stop Pin which is shipped with the W7751H Smart VAV Actuator is unnecessary When the W7751H opens the damper rotates CCW 90 degrees to fully open NOTE Be aware that the damper is closed Until the W7751H is powered and the damper is driven open starting the fan system with all the VAV box dampers closed can cause duct
13. ient Protectors They must be installed on the thermostat sensor leads from the T7770C pins 3 4 5 6 and 7 LONMARK SPONSOR INSTALLATION INSTRUCTIONS INSTALLATION Horizontally mount the W7751H on the damper shaft and allow clearance for wiring servicing and module removal Avoid mounting the W7751H in areas where acid fumes or other deteriorating vapors can attack the metal parts of the actuator or in areas where escaping gas or other explosive vapors are present See Fig 2 for mounting dimensions Honeywell oo oT SS oo O CoS LLL TT S Fig 1 Excel 10 Smart VAV Actuator M19924 IMPORTANT The assembly is intended only for horizontal shaft mounting to assure proper heat dissipation from the controller housing The Smart VAV Actuator must not be mounted with the controller at the top 95 7553 04 EXCEL 10 W7751H SMART VAV ACTUATOR MAINTAIN A MINIMUM DISTANCE OF 3 IN 76 MM FROM OTHER DEVICES OR PANELS FOR REMOVING CONTROLLER COVER 1 13 16 46 4 116 103 3 5 8 92 Honeywell DE CLUTCH LEVER 3 3 4 95 MAINTAIN A MINIMUM DISTANCE OF 4 IN 100 MM FROM OTHER DEVICES OR PANELS FOR ATTACHING PNEUMATIC AIR FLOW TUBING I as aj sa M10523 19 Fig 2 W7751H mounting dimensions in in mm The W7751H assembly is field mounted to the VAV box damper shaft the same as used for a typical act
14. in to open If the damper is open it should begin to close NOTE Once finished programming disconnect the portable PC If no movement is observed check to see if 24 Vac is present at the controller on the W7751H With proper wiring 24 Vac present and proper commands from the software the actuator should operate properly If not the W7751H Smart VAV Actuator may need to be replaced Step 4 Verify Sequences of Operation For the detailed descriptions of the sequences of operation see the Excel 10 VAV System Engineering form 74 2949 LONWORKS and LONTALK are registered trademarks of Echelon Corporation LONSPEC is a trademark of Echelon Corporation Automation and Control Solutions Honeywell International Inc 1985 Douglas Drive North Golden Valley MN 55422 customer honeywell com 35 Dynamic Drive U S Registered Trademark Toronto Ontario M1V 4Z9 Honeywell Limited Honeywell Limit e Honeywell Printed in U S A on recycled 2008 Honeywell International Inc paper containing at least 10 95 7553 04 M S Rev 03 08 post consumer paper fibers
15. over pressurization and damage If the damper rotates counterclockwise CCW to open and the angle of the damper open to closed is 45 or 60 degrees see the following NOTE NOTE Special precautions must be taken for this application Mount the W7751H to the damper box Do not tighten the Allen set screws yet Before the part no 201614 Range Stop Pin which is shipped with the W7751H Smart VAV Actuator can be inserted in either the 45 or 60 95 7553 04 4 W7751H closes the damper will rotate CW 45 or 60 degrees to fully close RANGE STOP PIN ACTUATOR PLATES M10002 Fig 7 Properly inserting range stop pin The Honeywell Software Tool s miscellaneous parameter for rotation direction defaults to CW to Open which applies to the damper direction and angle in items 1 and 2 above The parameter must be changed to CCW to Open if the damper shaft rotates in this direction which applies to the damper direction and angle in items 3 and 4 above IMPORTANT It is advisable to leave the dampers in an open position after W7751H installation to avoid the possibility of overpressurizing the ductwork on fan startup Use the De clutch lever see Fig 2 for De clutch lever location to open the box damper on W7751H controllers that are powered down to prevent overpressurization in the ductwork on fan startup To use the De clutch lever press and hold the lever in the direction of the arrow this disengages the motor Turn t
16. rminal 3 wire run as short as possible Refer to Fig 16 Do not connect the analog ground terminal 5 to earth ground Refer to Fig 16 Power The 24 Vac power from an energy limited Class Il Power Source must be provided to each Smart VAV Actuator To conform to Class II restrictions transformers must not be larger than 100 VA The maximum current draw at 24 Vac is 1 25A IMPORTANT Power must be off prior to connecting to or removing connections from output terminals 9 and 10 Use the heaviest gauge wire available up to 14 AWG 2 0 mm with a minimum of 18 AWG 1 0 mm for all power and earth ground wiring For nonplenum open areas run cables exposed or in conduit if required If the W7751H Smart VAV Actuator is used on Heating and Cooling Equipment UL 1995 US only and the transformer primary power is more than 150 volts connect the transformer secondary to earth ground see Fig 10 NOTE Maintain a three inch 76 millimeter separation between Triac outputs and LONWORKSO Bus wiring throughout installation Auxiliary Switches The 201052A B C Auxiliary Switch can be used with the W7751H It allows for control of equipment external to the actuator for example electric reheat coils or fan at an adjustable point in the stroke from 0 to 90 degrees of the actuator The 201052 Switch is field added Self tapping Phillips head screws are included with the switch The switch can be mounted only on
17. shown in Fig 19 Switches 1 through 3 set ML7984B Valve Actuator timing to match W7751H outputs 0 1 sec minimum with maximum time of 25 6 sec Switch 4 determines actuator action Off Direct Acting On Reverse Acting 15 1 STRIP 1 2 IN 13 MM FROM CONTROLLER OR WALL MODULE E BUS CONNECTOR TERMINALS N a3 WIRES TO BE II ATTACHED AT ONE TERMINAL 2 TWIST WIRES 3 CUT TWISTED END OF WIRES TO TOGETHER 3 16 IN 5 MM BEFORE INSERTING WITH PLIERS INTO TERMINAL AND TIGHTENING SCREW THEN PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION M11413 A MINIMUM OF THREE TURNS Fig 15 Attaching two or more wires at terminal blocks 95 7553 04 EXCEL 10 W7751H SMART VAV ACTUATOR JACK FOR E BUS AIR FLOW NETWORK DP PICKUP ACCESS AIR FLOW DIRECTION W7751H MICROBRIDGE DP SENSOR TRIAC EQUIVALENT CIRCUIT NOT EARTH GROUND WALL MODULE OPEN SIGNAL CLOSED SIGNAL EARTH GROUND Y NOTE LOAD POWER WIRE STEM COM STEM IS CONNECTED UP DOWN TO TERMINAL 1 M6410 SERIES 60 VALVE ACTUATOR EN TWO OR THREE WAY VALVE EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM USE THE HEAVIEST GAUGE WIRE AVAILABLE UP TO 14 AWG 2 0 MM2 WITH A MINIMUM OF 18 AWG 1 0 MM2 FOR EARTH GROUND WIRE A TO ASSURE PROPER ELECTRICAL CONTACT WIRES MUST BE TWISTED TOGETHER BEFORE INSERTING INTO THE TERMI
18. t causes the mounting tab to loosen A 1 2 in 13 mm shaft does not require the use of the adapter 95 7553 04 EXCEL 10 W7751H SMART VAV ACTUATOR degree CW slot the damper actuator must be driven fully open CCW To do this the controller on the W7751H must be wired powered and connected to the portable PC via the Serial LonTalk Adapter SLTA The SLTA connects to the controller on the W7751H via the jack for Network Access on T7770 Wall Module or by the B Port on the Q7750A Zone Manager From E Vision Software drive the actuator on the W7751H fully CCW and insert T the range stop pin in either the 45 or 60 degree CW slot whichever applies see Fig 7 The range stop pin must go all the way through the Fig 6 Use Damper Shaft Adapter for 3 8 in 10 mm housing The pin can only be installed in the diameter round or square damper shafts CW slots when the actuator is in the CCW position Disconnect the portable PC once The W7751H is shipped with the actuator rotated in the fully programming has been completed Manually clockwise CW position The installation procedure varies open the damper shaft fully CCW and then depending on the damper direction and angle tighten the Allen set screws When the If the damper rotates clockwise CW to open and the angle of the damper open to closed is 90 degrees manually open the damper fully to the clockwise direction and mount the W7751H to the VAV damper box and shaft Tig
19. uator The actuator on the W7751H opens or closes a damper by driving the damper shaft in either the counterclockwise CCW or clockwise CW direction The actuator has a mounting tab on the bottom for securing to a VAV box damper The mounting tab is accessible through a hole in the controller with its cover removed see Fig 3 The tab is sized for a 1 4 in 6 mm Screw or pin not included The controller enclosure on the W7751H is constructed of a sheet metal housing and a plastic snap on cover Controller wiring on the W7751H is terminated to screw terminal blocks located under the snap on cover See Wiring section The sheet metal housing has two 1 2 inch 13 mm knockouts see Fig 2 compatible with 1 2 inch 13 mm or 3 4 inch 19 mm conduit NOTE The assembly is intended only for mounting to a horizontal shaft 95 7553 04 2 The W7751H actuator is shipped in the fully clockwise CW position 90 degree The W7751H Assembly must be mounted to a horizontal damper shaft to assure proper heat dissipation from the controller housing Mount the W7751H so that the actuator is parallel with the VAV box damper housing In general it is recommended that a washer or spacer be added between the VAV box damper housing and the actuator mounting tab to keep them parallel See Fig 4 N CAUTION Equipment Damage Hazard Mounting actuator unevenly with damper housing can damage actuator Mount actuator flush with damper housing or
20. usly On Bypass mode timed Occupied override 3 LED One flash per second Continuous Unoccupied override 4 LED Two flashes per second Remote only continuous Occupied override Step 3 I O Tests The controller can be configured using the LONSPEC or E Vision PC configuration tool Once this is done the W7751H can be commanded to MANUAL mode and each output and input can be exercised viewed to verify proper wiring connections and equipment operation W7751H Actuator Checkout To check out the actuator on the W7751H determine the direction the damper shaft moves to open the damper CW or CCW See Fig 5 NOTE Devices for use only if used for Energy Management Q7740A B and Q7751A Devices for use on an Energy Management and or Smoke Control 14507287 Series Power Supplies W7751B2010 W7751D2016 W7751F 2011 W7751H2025 Series 9 W7761A2010 Q7750 Q9200 XFL521 XFL522 XFL523 XFL524 XL500 XLINK Connect the controller with the laptop PC To do this the controller on the W7751H must be wired powered and connected to the portable PC via the SLTA The SLTA connects to the controller on the W7751H via the Jack for Network Access on T7770 Wall Modules or by the B Port on the Q7750A Zone Manager From LONSPEC or E Vision Software drive the actuator on the W7751H open and then closed Observe the operation of the actuator if the damper is closed it should beg
21. ved cable type is Level IV 22 AWG 0 34 mm plenum or non plenum rated unshielded twisted pair solid conductor wire For nonplenum areas use CMP listed cable n plenum areas use CMP listed cable Donot bundle output wires with sensor digital input or LONWoRKS Bus wires Ensure that neither LONWORKSO Bus wire is grounded n noisy high EMI environments avoid wire runs parallel to noisy power cables motor control centers or lines containing lighting dimmer switches Keep at least 3 in 76 mm of separation between noisy lines and LONWORKS Bus cable Do not use different wire types or gauges on the same LONWORKSQ Bus segment Step changes in line impedance characteristics cause unpredictable reflections on the LONWORKSQ Bus Wiring Details Wire to the terminal blocks as follows 1 Strip 3 16 in 5 mm insulation from the conductor 2 Insertthe wire in the required terminal location and tighten the screw to complete the termination NOTE With the exception of 14 AWG 2 0 mm if inserting two or more wires into one terminal location twist wires together before inserting them See Fig 15 Deviation from this rule can result in improper electrical contact The controller on the W7751H has the terminal arrangement shown in Fig 16 Fig 16 through 21 provide detailed wiring diagrams for the W7751H Refer to installation diagrams for specific wiring NOTE Ensure Configuration DIP Switch is set as
22. wing allowable states 1 Off no power to the processor 2 Continuous on processor is in initialized state 3 Slow blink controlling normal state 4 Fast blink when the Excel 10 VAV Controller has an alarm condition When an Excel 10 has an alarm condition it reports it to the central node on the LoNWoRksQ Bus Also the Excel 10 VAV Controller variables AlarmLogX where X is 1 through 5 that store the last five alarms to occur in the controller are available These points can be viewed through workstation software Refer to the VAV System Engineering Guide form 74 2949 Table 12 for a description of the Excel 10 Alarms NOTE The node can be reset by switching the node to MANUAL and then to the normal operating mode ML7984B T E lt m gt 9 c 2 9 lt gt a z n PWM OUTPUT FROM CNTRL ML7984B PWM VALVE ACTUATOR Y PWM H 24 VAC PWM OUTPUT FROM CNTRL ESESEWES VAN Ml PERIPHERAL REHEAT VALVE ACTUATOR L T 7 l mja MAKE SURE ALL TRANSFORMER POWER WIRING IS AS SHOWN 2 3 4 OFF REVERSING TERMINATIONS WILL RESULT IN EQUIPMENT MALFUNCTION A TO ASSURE PROPER ELECTRICAL CONTACT WIRES MUST BE TWISTED TOGETHER BEFORE INSERTING INTO THE TERMINAL BLOCK CONFIGURATION DIP SWITCHES LOCATED ADJACENT TO THE INPUT TERMINAL BLOCK ON ML7948B M10528 Fig 19 W7751H to PWM Valve Actuator 95 7553 04 EXC
23. y environments a 5 micron disposable air filter is recommended for the high pressure line marked as connected to the air flow pickup When using twin tubing from pickup split pickup tubing a short length to accommodate connections Tubing from air flow pickup to VAV controller should not exceed three feet 0 914m Lengths longer than this can degrade flow sensing accuracy EXCEL 10 W7751H SMART VAV ACTUATOR To prevent VAV air flow connector breakage use caution when removing tubing from it Always pull straight away from connector never remove by pulling at an angle Wiring All wiring must comply with applicable electrical codes and ordinances or as specified on installation wiring diagrams NOTES For multiple controllers operating from a single transformer the same side of the transformer secondary must be connected to the same input terminal in each controller and the ground terminals 3 on the W7751H 28 on the W7751B and 32 on the W7751D F must be connected to a verified earth ground for each controller in the group See Fig 10 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 See System Engineering form 74 2949 for power wiring recommendations All loads on an Excel 10 Controller must be powered by a single transformer Keep the earth ground connection te
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