Installation Instructions
Contents
1. for W7752J CAUTION Turn off power prior to connecting to or removing connections from any terminals to avoid electrical shock or equipment damage Use the heaviest gauge wire available up to 14 AWG 2 5 mm with a minimum of 18 AWG 1 0 mm for all power wiring Strain relief support must be provided for power wiring within 2 3 8 in 60 mm of controller connection IMPORTANT To comply with CE requirements with devices having a voltage range of 50 to 1000 Vac or 75 and 1500 Vdc which are not provided with a supply cord and a plug or with other means for disconnection from the supply having a contact separation of at least 3 mm in all poles the means for disconnection must be incorporated in the fixed wiring W7752 FAN COIL UNIT CONTROLLER Communications Wire the controller communications E Bus using level IV 22 AWG Belden part number 9D220150 or plenum rated level IV 22 AWG Belden part number 9H2201504 nonshielded twisted pair solid conductor wire When possible use Honeywell AK3781 AK3782 AK3791 or AK3792 cable US part numbers Pull the cable to each controller on the E Bus and connect to terminals 9 and 10 The W7752 FCU Controller utilizes a free topology transceiver FTT10A E Bus which allows daisy chain loop and star network configurations or any combination thereof Depending upon the E Bus configuration used one or two termination modules part number 209541B may be required Diff2. 2 3 stage 24Vac stage1 stage2 24Vac stagel stage2 stage 3 stage 3 PWM 24Vac PWM 24Vac PWM Thermal 24 Vac on off l 24 Vac on off Honeywell Home and Building Control Honeywell Inc Honeywell Plaza Home and Building Control Honeywell Limited Honeywell Limitee 155 Gordon Baker Road Honeywell AG P O Box 524 North York Ontario D 71101 Sch naich Minneapolis MN 55408 0524 M2H 3N7 Germany USA Canada http www honeywell com http www honeywell ca 95 7519 3 Rev 6 99 7157 234 printed in U S A B blinger Stra e 17 Home and Building Control Products DIN EN ISO 9001 14001 http europe hbc honeywell com Subject to change without notice
3. Honeywell EXCEL 9 ayy Yo SPE nM BEFORE INSTALLATION The Excel 10 Fan Coil Unit FCU Controller is available in the following five models 1 W7752D2007 230 Vac power with electric reheat relay 2 W7752E2004 230 Vac power without electric reheat relay 3 W7752F2002 115 Vac power with electric reheat relay 4 W7752G2000 115 Vac power without electric reheat relay 5 W7752J2003 100 Vac power without electric reheat relay The models all have identical housings and mounting procedures IMPORTANT It is recommended that devices be kept at room temperature for at least 24 hours before applying power to allow any condensation resulting from low shipping storage temperatures to evaporate This device must be installed in a UL listed enclosure offering adequate space to maintain the segregation of line voltage field wiring and Class 2 field wiring US requirement only INSTALLATION Mount the Fan Coil Unit controllers in locations that allow clearance for wiring The controllers can be mounted on a Excel 10 W7752D E F G FAN COIL UNIT CONTROLLERS INSTALLATION INSTRUCTIONS panel with screws or by snapping onto standard EN 50 022 DIN rail 1 3 8 by 9 32 in 35 mm by 7 5 mm See Fig 1 for mounting dimensions See Fig 2 for DIN rail mounting The type and length of screw required for screw mounting depends upon the panel material used to mount the controller The controller can be mount
4. ed either vertically or horizon tally However if thermal actuators are connected to the controller outputs it is recommended that the controller be mounted so that the transformer is not located beneath the electronics A WARNING ELECTRICAL SHOCK HAZARD Source power at terminal block can cause personal injury or death W7752 FCU Controllers must be mounted inside their respective fan coil unit boxes to prevent access by unauthorized personnel To reduce the risk of fire or electric shock install in a controlled environment relatively free of contaminants Wiring All wiring must comply with applicable electrical codes and ordinances Refer to job or manufacturers drawings for details 2 3 8 61 11 16 17 i uo a Honeywell 2 7 32 56 11 8 HAAR AAAAAA ARARARA AA 9 3 4 248 95 16 237 om L 28 Fig 1 Excel 10 Fan Coil Unit Controller outside and mounting dimensions in in mm iff LONMARK U S Registered Trademark Copyright 1999 Honeywell Inc All Rights Reserved 95 7519 3 W7752D E F G J FAN COIL UNIT CONTROLLERS Fig 2 DIN rail mounting Power Input power provided must be 230 Vac 10 15 50 or 60 Hz for W7752D and E 115 Vac 10 15 50 or 60 Hz for W7752F and G and 100 Vac 6 50 or 60 Hz
5. erent connections to the termination module are necessary depending upon whether it is used in a singly or doubly terminated network configuration See Excel 10 FTT LPT 209541B Termination Module Installation Instructions form 95 7554 NOTES The E Bus is insensitive to polarity eliminating installation errors due to miswiring Do not bundle output wires with sensor digital input or communications bus wires Maintain a minimum 3 in 76 mm separation between E Bus and Triac output wiring For installations try to avoid areas of high electromagnetic noise EMI Some T7770 Wall Modules used for 2000 series FCU controllers have a daisy chain connection for the E Bus to provide network access via built in jack For more information see E Bus Wiring Guidelines form number 74 2865 Wall Modules A variety of Excel 10 wall modules can be used with W7752 FCU Controllers See T7460 Wall Modules Installation Instructions form number 95 7610 T7560 Digital Wall Module Installation Instructions form number 95 7620 and T7770 Wall Modules Installation Instructions form number 95 7538 for installation details W7752 FAN COIL UNIT CONTROLLER 9ko TERMINATION MODULE Fig 3 Termination module connection daisy chain network configuration 95 7519 3 Wiring Details Connections to the FCU controllers are made at 2 terminal blocks protected by a plastic cover W7752D and F models have 2 additional termi
6. mproper electrical contact See Fig 5 Local wiring codes may take precedence over this recommendation 1 STRIP 1 2 IN 13 MM FROM WIRES 2 TWIST WIRES TOGETHER WITH 3 CUT TWISTED END OF WIRES TO 3 16 IN 5 MM BEFORE TO BE ATTACHED AT ONE PLIERS A MINIMUM OF THREE INSERTING INTO TERMINAL AND TIGHTENING SCREW THEN TERMAINAL TURNS PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION Fig 5 Attaching two or more wires at terminal blocks 95 7519 3 W7752D E F G J FAN COIL UNIT CONTROLLERS OCCUPANCY SENSOR CHANGEOVER CONTACT AIRFLOW CONTACT WINDOW CONTACT MOTION SENSOR WALL MODULE CONNECTIONS W7752 FAN COIL UNIT CONTROLLER DGND DIGITAL INPUT LED SETPOINT FAN BYPASS 6 TEMP SENSOR 8 LonWorks NETWORK IN E gt E BUS IN lt E BUS OUT LONWorks NETWORK OUT eRe OUT ve HEAT Fe ONORA Soki CLOSE OUT 1 CLOSE N7 OUT 2 COM COOL OREN OUT 2 OPEN N crose OUT 2 CLOSE FAN 4A om Aye E Ti ee a 7 HA L OO SUPPLY VOLT REHEAT van POWER MAINS gai SUPPLY VOLT SO PWR RELAY IN D F MODELS ONLY PWR RELAY OUT D F MODELS ONLY Fig 6 FCU Controller terminal assignments Table 1 Output assignments for various actuator types Output type Out 1 Terminal l Out 2 Terminal 13 14 145 4 17 48 Floating 24 Vac open close 24 Vac open close 1 stage 24 Vac __ on off 24 Vac on off 2 stage 24 Vac stage 1 stage2 24 Vac stage 1 stage
7. nals on terminal block 2 for electric reheat connections Fig 4 shows removal of the terminal block cover Use a minimum wire size of 20 AWG 0 5 mm for all input output connections Use a minimum of 16 AWG 1 5 mm for electric reheat output connections The maximum length of all input output cables and wall module W7752D E F G J FAN COIL UNIT CONTROLLERS interface cables is 65 ft 20 m The maximum length for fan power switching cables is 3 1 2 ft 1 m Fig 6 illustrates the terminal assignments of the controllers Table 1 lists Triac output assignments for various actuator types Refer to job drawings for specific wiring diagrams IMPORTANT Screw type terminal blocks are designed to accept no more than one 14 AWG 2 5 mm conductor Multiple wires that are 14 AWG 2 5 mm can be connected with a wire nut Include a pigtail with this wire group and attach the pigtail to the individual terminal block Fig 4 Terminal cover removal Wire to the terminal blocks as follows 1 Strip 1 2 in 13 mm insulation from the conductor 2 Insert the wire in the required terminal location and tighten the screw to complete the termination 3 If two or more wires are being inserted into one terminal location twist the wires together before inserting them 1 2 IN 13 MM IMPORTANT When two or more wires are to be attached to the same terminal be sure to twist them together Deviations from this rule can result in i
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