TB12 FA FA 24V 24V TB2 MXC TB3 TB4 TB5 TB6 D M P R TB7 TB8 U X H V O B S T E M RC RH. Manual and Automatic Thermal Circuit Breakers

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1 J1 F1 D1 1 D2 I I 1 2 D3 5 D4 6 D5 7 D6 8 D7 9 D8 10 D9 11 D10 12 D11 13 D12 14 D13 15 D14 16 D15 17 D LI LII U U LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 LD9 U15 U18 LD10 LD11 LD12 LD13 LD14 LD15 LD16 LD17 LD18 1 HI LII D17 D18 D19 D20 D21 D22 U D ULI H DIFFIL U2 4 U3 5 U4 6 U5 16 U6 20 U7 23 U8 24 U he U4 Universal one ontrol ystem allows you to easily upgrade an inefficient single zone HV system, into an utomated, ulti-zone, nergy saving, omfort producing, afety inded, HV system. With uperior design, Intuitive firmware, uilding ode ompliant support, imple setup options, and asy to understand wiring, the U4 oning system is the Designer/ontractors dream. ombined with Patented W motorized dampers and practically any ff-theshelf onventional or Heat Pump style hermostats, W has set a ew Industry tandard in Large esidential and ommercial HV ir oning ystems. one apacity ompatible HV ystems ompatible hermostats utomatic Heat/ool hangeover tatus LD ystem LDs Damper LDs perating Power -221 Forced ir one ontrols he main module controls four air zones using 24 vac motorized air dampers and may be expanded up to 20 zones, using X xpansion odules. ee page 23. he U4 will ontrol 2, 3 & 4 stage onventional, eohermal or Dual Fuel Heat pumps, without the need for dual fuel kits. lso single or multi-stage as, il, & Hydronic HV systems, with single or two stage cooling and onstant or Variable speed fan systems. ompatible with most ff the shelf 1 or 2 stage onventional Heat/ool or Heat Pump hermostats. ll echanical, Digital/lectronic, Dual ode, and Internet ompatible hermostats that operate on 24vac. attery powered or Power robbing thermostats that draw less than 20 ma of current are also compatible. one 1 will accept ne one ode, arbon Dioxide afety and uxiliary/dehumidify mode inputs. ee pages 9-11 & for details. he U4 one system features automatic changeover from any thermostat allowing for individual zone comfort from the HV system. he U LD pulses as a steady heart beat to indicate active icroprocessor status. n board ulti-colored LD s will illuminate to indicate system status, HV system mode, and active / inactive zone identification. ee page 22 for details. Damper 1 thru Damper 20 green LDs will indicate which zone dampers are demanded to energize pen or losed. IPU VL: 19-30V 60 Hz ransformer V X. lass 2. U DW: ax 24V. V-U PI: 4.0 HIL ULLI odel U4 one ontrol Leave this bulletin on the job site for future reference! L I. W nglishtown, J ox ontents anual and utomatic hermal ircuit reakers perating onditions Indoor Fan ontrol * U4 one ontrol Panel * upply ir ensor * echnical ulletin 219 * ounting Hardware he main U4 module has a anual eset circuit breaker with a round Fault Indicator that protects all connected modules and thermostat circuitry. ll modules have separate damper motor hermal reakers too. hey protect the damper motor circuitry from shorts in the field wiring. he breakers will not protect against shorts in the HV system wiring. UI: When the thermal breaker is tripped it will get quite hot. o reset the breaker: hut off power to the panel. Find and repair the short. estore the 24V power. PU: -20 to 160 F (-29 to 71 ) HUIDI: 0% - 95% H on-ondensing. he U4 allows constant operation of the Indoor Fan by hermostat #1 only, or by each individual thermostat. When controlled by thermostat #1, ll one dampers will respond. When controlled individually, ones not calling for continuous fan will close. amp or 100V. W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 1 P/ evision I opyright W ontrols ll ights eserved F F 24V 24V X X H H LIK HV l JP1 4 K1 K2 3 K3 K4 K5 2 1 D P D U X L H V JP3 K7 K8 K9 K10 K11 K12 K13 K JP2 FF LD UD FUL s > HP V DF< HP> FF< F P> 90s< PU> 180 < > FF < 50% > FF < F> HD U LII LII LII 4 3 P P 2 P 1 P DP P P UX L F DP P2 P1 V 37 > H > HP 1 <#> 2 <V> FF <DL > <UX L> D FF <> 0 < L > +10 <F L> 1 > VLV H I H U K1 K J PU W3 U UX L 2 2 Figure 1.

2 2 U4 DD FIW D HDW FU ooling and Heating Limit ontrols Indoor Fan ontrol During Heating uilt-in imer ettings Definitions are explained below *hort ycle imer *hangeover imer *Inter-stage imer *pposite ode Delay imer *taging imer / FF 42 ULI imer / FF or 7 to 42 minutes or 7 to 42 degrees F. Use when imer or utside ir hangeover is required. ee Page 7 *upply/eturn ir Limit Delay imer dip switch is provided to enable automatic fan operation in heat mode. Useful for straight electric heat or hydronic heat applications. : Fan mode is automatically set when Heat Pump is selected. he panel has built-in delay timers that insure safe & reliable operation. *hort ycle imer 3 minutes - Fixed. *hangeover imer 4 minutes - Fixed. *Inter-stage imer 2 minutes - Fixed. *pposite ode Delay imer *taging imer etting 20 minutes - Fixed. 7 to 42 minutes or 7 to 42 F *upply / eturn 3 minutes - Fixed. ir Limit Delay imer When all zone demands are satisfied, the panel will not resume the same mode operation for a minimum of 3 minutes. When a demand to hange ver has been honored. 4 minute delay timer prevents the system from rapidly changing between Heat to ool, or ool to Heat mode. 2 minute time delay that occurs between thermostatic demands to stage up or down. 20 minute delay must expire, or all act i ve zone( s) m ust sat i sf y, bef or e t h e U 4 w i l l h o n o r a t h e r m o s t a t d e m a n d t o c h a n g e o v e r t o t h e opposite mode of system operation. he delay is fixed & cannot be changed or defeated. he I I sets the amount of continuous & cumulative call time in 1st stage, before second stage heat or cool is energized. lso applies to 3rd & 4th stage heat. : he potentiometer also serves as the 2nd or 3rd stage Heat, utside ir hangeover etting. he U4 can inhibit 2nd or 3rd stage heat based on ime or utside ir emperature. ll staging scenarios depend upon the type of thermostat used. ee page 5 & 7 for details. : n ptional ensor is required to use the feature. : utput defaults to 30 minutes, if is chosen and single stage thermostats are used. he time delay of 3 minutes must expire before the U4 will reenergize heat or cool mode. his occurs when the processor detects the supply or return air temperature is higher or lower than the Heat/ool limit settings. he operational sequence of the limit controls depends upon the dip switch settings chosen on the U4 main module. ultistage Heat Pump sequence will differ from onventional as/lectric he djustable ooling Limit potentiometer sets the supply air temperature at which the 1st & 2nd stage cooling is cycled off and the fan LI LII continues to run, allowing the coil to warm up st H LII ULI H DIFFIL imer eset U I PU eset U xample: Hi emp. limit=130 Plus. stg = 40 ew limit F = 170 mergency Heat witch W ontrols Inc. 385 Highway 33 nglishtown, J FX he djustable Heating Limit potentiometer sets the 1st or 2nd stage heat supply air temperature, at which the heating is cycled off and the fan continues to run, allowing the heat exchanger or coil to cool down. he djustable ultistage Heat differential potentiometer sets the 2nd and/or, 3rd, & 4th stage heat supply air temperature, at which the heating is cycled off and the fan continues to run, allowing the heat exchanger or coil to cool down. : llows the supply air sensor to be installed in the supply air plenum, regardless of the coil/heat exchanger configuration. llows the installer to fine tune virtually any multistage heating system! omentarily pressing the I button will clear any ctive ime Delay. his enables you to test and certify the installation faster. : Do not use sharp objects to press the button. Use your finger tip or the eraser head of a pencil. Press & Hold the button for 5 seconds. hat will reset the ain & xpansion modules on a U4 oning ystem. : three minute startup delay occurs whenever the PU eset button is pushed, upon any initial power up, or when a power failure has occurred. n n-oard witch is provided that allows the user to set the system to the mergency heat mode. his switch is shown in the L position. : n mergency terminal is also provided at every hermostat terminal b l o c k, a l l o w i n g H e a t P u m p hermostats to be connected to every zone. -ail- info@ewccontrols.com

3 U4 DVD FIW D HDW FU IUD *FI L ILK FU uilding ode ompliant upport Fire larm ctivation ver-rides LL functions and features ll onnected Dampers will close and the HV system will shut down *Demand ased Ventilation 2 I FH I IF FU uilding ode ompliant upport his feature is not affected by Heat/ool perations Fire larm ctivation ver-rides this feature & he U4 includes a Fire larm system interlock feature. Wire the U4 into your building Fire larm system, and achieve full HV system shutdown, and losure of all Duct dampers, in the event of Fire ode ctivation. he circuit is normally closed and must open to activate this mode. Fail afe dry contact is required on the Fire larm ystem. When the Fire alarm system resets to normal, the U4 will also resume normal operation. lip the on-board jumper and wire as shown on page 17. he U4 includes a arbon Dioxide and Fresh ir interface feature. Wire the U4 up to a separate 2 onitor with auxilary dry contacts. When the 2 onitor activates, the U4 will open a fresh air damper connected to it s damper terminal block, and start the HV system fan. he circuit is normally open and must close to activate this mode. normally open dry contact is required on the 02 onitor or Fresh air imer or ther Device. When the 2 monitor resets to a normal 2 level, the U4 will close the fresh air /auxilary damper. ther external dry contact devices can be connected to the 2 terminals such as a anual witch, nthalpy ontrol, or lockimer. ee page 16. : ooling & Heating operations are not affected by activation of this feature. : ctivation of the Fire larm Interlock feature will over-ride the 2 onitor feature. UXIL or DeHUIDIF IF L nhanced omfort olution uxiliary dry PD output his feature is affected by Heat/ool perations Fire larm ctivation ver-rides this feature LI P DP UPP FU nhanced irflow olution Fire larm ctivation ver-rides this feature he U4 includes an uxiliary Interface Input and PD action Dry ontact utput. his allows the Installer to connect various uxiliary controls such as Humidify or DeHumidify controls. imply connect the ontrolled Device or ircuit to the utput dry contacts and achieve integrated control without 3rd party isolating relays. ee Page 14 and 15 for example control and wiring solutions. he uxiliary input logic can be field selected as (D) Direct cting to humidify or () everse cting to Dehumidify. he U4 activates a unique algorithm to rapidly de-humidify the home without over-cooling it. ee page 14. he U4 includes support for an lectronic ypass Damper. Wire up a W odel D ypass Damper to achieve precise control of the HV system static pressure and bypass damper operations. Wire up the odel D damper as shown on page 17. he U4 defaults the ypass Damper to the pen position during IDL periods. It will also maintain that position for 45 seconds; at the start of any thermostat demand for Heating, ooling, or Fan only peration. he 45 second time delay allows a constant or variable speed fan to start in a Quiet ode and does away with noisy air duct velocities upon system startup. Latent cooling effect is also achieved by using this feature. fter 45 seconds the U4 will release control of the system static pressure to the D diaphragm control and a gradual increase in system static pressure is achieved. : he U4 will not resume control of the D, until the next IDL period begins. W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 3

4 U4 DVD FIW D HDW FU IUD U I II FU nhanced HV ystem afety and nergy avings olution ote: If this feature is nabled but the is not connected or is not detected; he LD will blink rapidly as a warning and he U4 will not allow operations to occur. ote: When the eturn ir sensor detects a return air temperature between the tage Up Value and the tage Down Value, the LD will blink slowly as a warning. he U4 will also hold at the current staging until the system status changes sufficiently to allow a stage up or down. he U4 includes a U I PU I feature. onnect an PIL eturn ir ensor (#) to the U4 and achieve the ability to DW the HV system if the return air temperature exceeds the return air temperature limit set points. et the Dipswitch #6 to the position, and choose either (0) or (+10) at the LII Dipswitch # 7. oth switches are located on the Dipswitch ank#2. he U4 will now monitor the return air temperature and allow tage up, or if necessary tage Down the cooling or heating operation to maintain a return air temperature within the following values. s stated above, choose either (0) to accept the default return air limit values for your particular HV system or choose (+10) to offset the default values 10 degrees higher. ote: he (+10) offset applies to heating operations only. he default return air temperature limit set points for cooling operations cannot be offset. U I LII DUI HI L F H PUP L: Default (0) set points: If the eturn ir temperature is: 80 degree F. or below, tage Up is allowed. 105 degree F. or above, tage Down is forced. Default (+10) set points: If the eturn ir temperature is: 90 degree F. or below, tage Up is allowed. 115 degree F. or above, tage Down is forced. U I LII DUI HI L F, IL, IH LI: Default (0) set points: If the eturn ir temperature is: 80 degree F. or below, tage Up is allowed. 115 degree F. or above, tage Down is forced. Default (+10) set points: If the eturn ir temperature is: 90 degree F. or below, tage Up is allowed. 125 degree F. or above, tage Down is forced. U I LII DUI LI L F LL HV P: Default (0) set points: If the eturn ir temperature is: 65 degree F. or above, tage Up is allowed. 55 degree F. or below, tage Down is forced. Default +10 applies to heating operations only. he eturn ir ensing Feature cannot cycle the 1st stage equipment off-line. It can only force a tage Down when the equipment is in 2nd stage cool or 2nd, 3rd, or 4th stage heat, and the selected return air set points above have been exceeded. he upply ir ensing feature is the only monitor that can cycle the 1st stage equipment off-line. three minute delay will occur after a forced stage down. If a stage up demand is present, the U4 will allow the stage up to re-occur when the three minute delay has expired and the return air temperature is back to normal. he U4 will automatically adapt to the,il,li set points when a Heat Pump system stages up to Fuel or uxiliary mode. his powerful feature will enhance the efficiency of your oned HV system and protect the equipment from excessive bypass temperatures during low load conditions. 4 W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com

5 U4 DVD FIW D HDW FU IUD DUL DUL F PW WII he U4 includes Factory Power Wiring on all expanded systems. he 24 vac power to the expansion modules is fed through the bus cable. he bus cable feeds power to all module processors & thermostats. Damper otor terminal blocks are isolated and powered separately. his simplifies your wiring, reduces the chances of polarity reversal and allows more connected dampers per zone. DI DUL FUL PIL FIW he U4 is fully compatible with Dual Fuel Heat Pumps, and other Hybrid HV systems. Dual Fuel kits are not required. elect staging based on djustable ime Delay, an ptional utside ir temperature ensor, or allow the thermostats to control staging. he intelligent firmware does the rest. PID D-HUIDIF FIW he U4 will perform a unique de-humidify function when a demand to de-humidify is detected at the uxilary Input terminal. he U4 will energize the mergency heat relay to activate one electric strip bank at the same time the cool is active, so long as the demand to de-humidify is detected. his powerful feature will rapidly de-humidify your home, and tempers (reheats) the supply air to prevent over-cooling. ee Page 14 for details. 2 DD D VILI UPP he U4 includes support for Demand ased Ventilation ontrol scenarios. Designed to help meet or exceed local building codes and H ventilation standards. imply connect your 2 onitor and a Fresh ir damper to the U4. * 7 42 IU UP I DL I * DD LIII FU * 7 42 D F. UID I HV * U LD s ILUDD LL DUL * ULI- H DJUL LII L * LI P DP UPP * UXIL ULI-FUI UPP L * D K PILI * IPLIFID WII D UP * FI L IF HI DD UP LL he U4 is the first one ontrol ystem to allow 4 stage thermostats to be connected to all zones he U4 is capable of numerous staging sequences depending on the type of HV system being controlled, the type of thermostats connected, and the programmed staging sequence you desire. s always you can still control a multi-stage HV system using inexpensive single stage thermostats and sequence the staging by on-board adjustable time delay, or by using an optional outdoor air sensor () and sequence the staging via an outdoor air set point. ou can still control a state of the art multi-stage Heat Pump using single or two stage conventional thermostats and sequence the staging by time delay or outside air set point. ou can choose to control most any multi-stage Heat Pump or onventional HV system with multi-stage thermostats on all zones. he U4 can be programmed to stage up or down based on the thermostat inputs from each zone. he U4 allows a level of versatility that has never before been offered by any zoning company. ou can choose to install 3 or 4 stage thermostats on the largest zones, 2 stage thermostats on medium sized zones and single stage thermostats on the small zones. o achieve staging via thermostatic demand only; hoose () imer setting on Dipswitch #5 ank 1 nd then set the ulti-tage imer setting to (0) ero. etting the imer to zero disables imed taging and the U4 will stage up or down only when the thermostat(s) demand it. W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 5

6 electing the ptions Using the DIP witches D U DIP WIH I H Programming and setting up the U4 is very easy! heck the witch Legend and refer to the following pages for an explanation of each dip switch function and choose your settings. ome functions may not apply to your application. Use a pencil to fill in the square & record your settings. If the settings get changed later on, you will have a record of the original settings. : When you choose HP at switch #1, ank 1, the fan mode is automatically set for you. here is no need to move switch #8, ank1. Leave it in the factory setting. D U DIP WIH I H ank1 ank ***F = Factory ettings WIH LD F HP < > DF < HP > V F F FF < F P > 90s < PU > 180s F < > F F FF < 50% > F FF < > F < F > HD H < > HP F1 < # > 2 F < V > F FF < DL > < UX L > D F F FF < > F 0 < LII > +10 < F L > 1 F Detailed explanations of each Dip witch Function are included on the following pages. Please study and familiarize yourself with all of the functions and features, prior to activating the oned HV system. ot all features will apply to your application. he U4 comes from the factory pre-set to operate a 2 stage Heat Pump using heat pump thermostats to control the staging. Failure to properly set all dip switches to the correct and/or desired positions will result in improper operation of the controlled HV ystem. Please read and study the entire echnical ulletin and if necessary, all the W echnical upport Hotline when assistance is required. Leave this echnical ulletin with the Home or uilding wner for future reference. F IUD X P... 6 W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com

7 electing the ptions Using the DIP witches - K1 1 2 HP < > hoose the type of HV system you want to control. elect HP, if your system is any type of heat pump. elect, if your system is a any type of as / il furnace, or any straight lectric furnace or Hydronic (hot water / steam) heating system. DF < HP > V If you chose HP at switch #1, then choose the type of Heat Pump you want to control. elect DF, if your system is a Dual Fuel heat pump with as or il furnace backup heat. elect V, if your system is a onventional heat pump with lectric resistance backup / supplemental heat. lso applies to round source / eothermal heat pumps with lectric backup heat. 3 FF < F P > elect, if you want the U4 to force the indoor blower at the end of a heat/cool call to assist the zone purge cycle. electing FF will allow the HV system to operate the indoor blower, without interference from the U < PU > 180 elect 90 or 180, if you want the zone dampers to hold position for 90 seconds or 180 seconds at the end of any heat or cool call. his allows the HV system to purge the remaining hot or cold air, into the zone(s) that were calling for it. 5 6 < > elect, if you want to delay multi-stage operations based on the outside air temperature sensor. elect I, if you want to delay stage up based on the adjustable on-board timer. oth features are very useful when using single stage thermostats on all zones. 1: / stage up defaults to a 30 minute delay, when is chosen. 2: n optional utside ir ensor (Part#) is required to use the feature. 3: hermostat demands to stage up, will always over-ride the imer or staging operations, Unless the 50% rule has been enabled, or the eturn ir temperature limit has been exceeded. 4: hermostatic demands to tage Down will be honored unless the imer is also in use. 5: Disable the imer by setting to FF, and the U4 will obey tage up & tage down demands via the thermostats only! FF < 50% UL > elect FF, if you do not want to inhibit two stage compressor cooling operations based on the total number of zones calling. elect, if you want to inhibit 2nd stage cooling compressor based on the total number of zones calling. Half or more of the total number of thermostats must be calling or stage up will not occur. 1: In ll odes, the 50% rule occurs between and. 2: In as mode the 50% rule occurs between &. 3: If Dual Fuel or has been selected, the 50% rule applies to cooling only. Heating stage up will not be affected by this setting. mergency mode is never affected by the 50% rule. 7 FF < > elect FF, if you do not want to use the upply air sensor included with the U4 one ontrol system. elect, if you want to use the included upply air sensor. efer to the data sheet included with the upply air sensor for installation details. efer to page 2 for details on upply air ensing Limit ontrols and settings. ount the upply ir ensor in the discharge duct and/or plenum. 8 < F > HDI elect, if your HV system is a gas or oil forced air furnace. elect HDI, if your HV system has a hot water / steam coil, or straight electric heat with no indoor blower support. Useful when you need the indoor blower to run automatically in heat mode, just like it does in cool mode. : When you select HP on dip switch #1, the indoor fan mode is automatically set for you. If so, then leave this switch in the factory setting. IUD X P... W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 7

8 1 2 electing the ptions Using the DIP witches - K2 H < > HP elect the type of thermostats you want to use. elect H, if your thermostats are the standard Heat/ool type. elect HP, if your thermostats are Heat Pump types. 1: ou cannot mix thermostat types. 2: ou do not need HP thermostats to control a Heat Pump. 3: hermostat demands to stage up, will always over-ride the imer or staging operations, unless the 50% rule has been enabled. 4: hermostatic demands to stage down will be honored unless the imer is in use. IP : he U4 one ontrol ystem allows Heat Pump or onventional ulti-tage thermostats to be wired to all ones! hermostat demands to stage up, will always over-ride any programmed staging operation. he U4 will remain in ulti-stage mode until that terminal is de-energized. If this occurs in dual fuel mode or emergency mode, the U4 will stay in that mode until all Heating demands are satisfied. n the next heating cycle, the U4 will attempt to activate 1st stage heat unless, mergency ode is still active, or the outdoor temperature is low and / DF has been selected. his comfort over-ride feature provides true versatility to your zoning system, and gives the homeowner comfort control capability over the system. 1 < # > 2 hoose the number of ondensing Unit tages you want to control. elect 1, if your U has a connection only. elect 2, if your U has a & connection. 1: his feature must be set correctly for proper imed & utdoor ir ensor staging operations. 2: hermostat demands to stage up, will always ver-ride the imer & staging operations, unless the 50% rule has been enabled, or the eturn air temperature limit has been exceeded. 3: ll stage up perations depend upon the correct setting of this switch. 3 < V > hoose the type of eversing Valve you want to control. elect, if your heat pump reversing valve energizes in cooling and defaults to heat mode. elect, if your reversing valve energizes in heating and defaults to cool mode. : he U4 will hold the output or the output continuously, even during idle periods, until a thermostatic demand to change modes is detected. : Proper setting of this switch is critical. he reversing valve will not function properly if this switch is not set correctly. 4 FF < DL > elect and the U4 will limit HV operations based on the total number of zones calling for conditioned air. 16% or 1/6 of the total number of zones (rounded up) must be calling for the same mode of operation, or the U4 will not activate the HV system. his feature only activates at 8 or more zones. elect FF if you do not want to utilize the one Demand Limiter feature. : one 1 is not affected by this feature. one 1 demands are always honored. DL example: zone system has 20 total zones and the DL feature is active; t least 4 zones must be calling for the same mode of operation (Heat or ool) or the U4 will not activate the HV system. 18zone=3, 16zone=3, 14zone=3, 12zone=2, 10zone=2, 8zone=2. 5 < UX L > D elect the control signal type you need, in order to activate your preferred uxilary elay function. hoose (everse cting) for De-Humidification ontrol, or hoose D (Direct cting) for Humidification ontrol, depending on the control input signal you require. hen connect your controlled device or circuit to the PD dry output contacts and achieve integrated control without the need for 3rd party relays or specialty relays. If this feature is not used, the switch must be in the D position. ee Pages for further information. 6 FF < > If you connect an PIL eturn ir ensor to the U4, then elect, and hoose to use the default set points for eturn ir emperature Limit perations, or choose to ffset those set points by 10 degrees higher at the next Dip witch. efer to the data sheet included with the eturn air sensor for installation details. ount the eturn ir ensor in the return air duct as close to the lower intake as possible, or in the blower cabinet. ead page 4 for perational details. 7 0 < LII > +10 If you connect an PIL eturn ir ensor and switch on the switch above; then choose 0 to accept the default set points for eturn ir emperature Limits, or choose +10 to ffset the default set points 10 degrees higher. efer to the data sheet included with the eturn air sensor for installation details. ead page 4 for perational details. 8 < F L > 1 elect which thermostat(s) can activate a demand for ontinuous Fan peration. hoose, and the U4 will honor any thermostat demand to activate continuous fan, and only the dampers connected to that zone will open. ll others will close. hoose 1, and the U4 will honor a demand to activate continuous fan from zone 1 only. ll connected dampers on all zones will open. Demands to activate continuous fan from any other thermostat will be ignored. : ontinuous Fan perations will only occur when there are no active or pending heat or cool operations. 8 W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com

9 ILLI IUI and H WII Installation should be performed by qualified personnel only. Follow local & national electrical & mechanical codes. Use multi-conductor 18 awg solid copper conductors. Wire number to number or letter to letter on each control or device. WI: H PL DID F U WIH 24-30vac. D U H VL! U UI VID LI HK QUIP D. ount the panel housing in a convenient location close to the ir Handler. ounting hardware is provided. Use the knockouts provided on the panel housing as entryways into the housing. train relief fittings can be used if desired. Use care and do not damage the circuit board when making wire connections. : he 24 vac power required to operate a U4 system must be supplied by a separate transformer. WI! D use the 24 vac power supply from the HV manufacturer s equipment. : Unlike previous U series zone control systems, the U4 supplies power to all connected expansion modules. his improved design simplifies the installation wiring and reduces the possibility of polarity reversal or incorrect transformer phasing. he U4 does allow you to isolate and power up the damper terminal block separately for greater versatility. single 24vac, 40va UL Listed transformer can power the U4 ain module with one damper on each zone. total of four zones and four dampers. ee page 19 for more load and transformer data. Figure 3. PW WII Line Voltage PVID F DI F 24vac, va UL LID U4 ain odule - Hot - ommon Figure 2. U4 Power wiring upply PIL 1 H / 1 L H WII / / DL W-3707 F F 24 V 24 V L * ommon wire not required if batteries are used. * odel W-3707: onfigured for 1 heat 1 cool (1 mode). ypical as, il or Hydronic ystem. VIL 2 H / 1 L H Figure 4. / / odel W-3707: onfigured for typical 2 stage as or lectric heating system with 1 stage cooling. VIL 2 H / 2 L H Figure 5. odel W-3102 : onfigured for typical 2 stage as or lectric heating system with 2 stage cooling. ll of the preceding diagrams reflect conventional (on-heat Pump) thermostats, controlling conventional HV systems. However, the equipment being controlled does not have to be the conventional type. heat pump system can be controlled using conventional thermostats. ut you cannot control a conventional system using heat pump thermostats. W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 9 / / DL W-3707 L * ommon wire not required if batteries are used. * UH H DL W L * ommon wire not required if batteries are used. *

10 H WII IUD UH H DL W L / 1 2 L / * ** UH H DL W-3102 * ** / / * * ommon wire not required if batteries are used. Field installed jumper. / / * * ommon wire not required if batteries are used. Field installed jumper. Figure 6. odel W-3102: onfigured for 2 heat 1 cool heat pump (HP1 mode). ee thermostat instructions for further details. Figure 8. odel W-3102: onfigured for 3 heat 2 cool heat pump (HP2 mode). ee thermostat instructions for further details. WIL H: IV DUL DL W-3900 WIL H: IV DUL DL W-3900 / / / / Figure 7. odel W-3900: Wireless hermostat. onfigured for 2 heat 2 cool ( mode). ee hermostat instructions for further details. Figure 9. odel W-3900 Wireless hermostat: onfigured for 3 heat 2 cool heat pump (HP2 ode). ee thermostat instructions for further Details. 10 W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com

11 WII F DI FL H H PUP D WIH D-HUIDIFII DL W-3611 H W 1 ' arrier ryant HIDI 2 Heat 1 ool H PUP FIUI / / / / UX W / / / / DHU Figure 10. o adiant floor / aseboard heat zone valve or pump relay Wiring a split circuit thermostat to operate a adiant floor heating or aseboard heating Hydronic system. he U4 controls the cooling only, in this type of configuration. WII F D Figure efer to Dehumidify perations on page 14. Wiring for typical 2 stage Heat,1 stage cool Heat Pump. Diagram reflects De-humidification terminal wired to the uxilary input. For auxilary output wiring see page 14. uxilary elay Dip witch #5, ank #2, should be set to everse cting. () 1 ' / ommercial rade hermostat H #1 DL I-250 I H H / U / / UX 2 2 / Figure 11. Wiring for automatic activation of ne one mode using a commercial grade thermostat in one 1. Program or wire the thermostat to nergize (close contact) the ne one erminal and setback the temperature when the building is Unoccupied...When the building is ccupied, the thermostat will de-energize (open contact) the ne one erminal. Figure 13. odel I-250 Internet hermostat: onfigured for 2 heat 2 cool. ee thermostat instructions for further details. W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 11

12 HV WII ingle ransformer as/il ystems 1 or 2 tage Heat ypical gas / oil system with /. jumper wire between c and h is provided. here is no need to install a jumper. onventional 4 tage Heat Pump with a ype eversing Valve ypical heat pump system wiring with electric resistance backup heat. Wire up the reversing valve to either or, depending on your system type. pplies to air cooled or geothermal / ground source systems. UD DI UI /IL Furnace 1or2 H /H LIK U4 H V - H PUP 2 X / W I HDL WIH LI I KUP H W U4 H /H LIK H V - Figure 14. ingle transformer as / / system. Diagram reflects a Heat Pump with a type eversing Valve a neutral or ommon terminal designated as. wo ransformer il/ Hydro ystems PIL F IL UD LK DI UI *W W* il / Wood urner Primary ontrol or oiler ontrol or one Valve or Pump ontrol erminals Wiring diagram for a typical oil burner, hydronic zone / ir handler with /. ut the c / h link on the U4 Panel for systems requiring isolation. Figure 15. wo transformer il or Hydronic / / system. * ote: our ir Handler may include a W terminal. hat means it may have it s own isolation circuit. If you can confirm this, simply connect the terminal to the W terminal on the air handler. Do not cut the c / h jumper. Wire up your il urner, Pump ontrol, or Hydronic one valve to the isolation terminals or wires provided in the air handler. (follow dashed lines)he fan is controlled via time delay relay inside the air handler, or set the U4 F Dip witch to the HD position. 12 ILI IL WI * U4 /H LIK ut c/h Jumper Figure 16. onventional Heat Pump ystem Dual Fuel Heat Pump with ype eversing Valve IL * FD I H FU V KUP H H PUP 1 - W H W ontrols Inc. 385 Highway 33 nglishtown, J FX * Wout W Hi fficiency Heat Pump with built-in utside ir hangeover apability. he Heat Pump makes the decision to run the Furnace. ote that the U4 can still operate the furnace in mergency ode! Figure 17. ingle stage heat pump and single stage furnace. ote that a onventional & Dual fuel heat pump could wire up more or less the same. he difference is how staged heat operates. In a onventional system, the indoor fan & the compressor continues to run when stage up occurs. In a Dual Fuel system, the indoor fan & the compressor shuts down when stage up occurs. he U4 will perform these functions automatically. ll you have to do is set the dip switches to the correct settings. elect DF or V at dip switch #2, ank 1. hoose to activate 2nd stage heat by I or by UID I PU. (ptional ensor equired) ou can also use ulti-stage thermostats in any or all ones. When the thermostat stage up heat demand is satisfied, the U4 will stage down, unless DF/ has been selected and the outdoor temperature is lower than the changeover setting. In that case the system will continue in FUL mode, until all heating demands are fully satisfied. our Heat Pump may be capable of making these decisions without the aid of the U4, in which case you may elect to wire your system as shown in figure 17. -ail- info@ewccontrols.com U4 H /H LIK H V -

13 WII IUD ypical / plit ystem 2 stage heat 2 stage cool 2 UD DI UI * wire may not be required on your utdoor ondensing Unit ypical 2 stage gas or straight electric furnace with 2 stage cooling. hoose imer or utside ir ensor to delay 2nd stage, or use 2 stage -stats on all zones. * 2 FU ote that you can route a ommon wire back to the ystem terminal block, but it should never be connected! Use it as a point while troubleshooting. It should be marked as such and remain capped off when not in use! U4 H /H LIK H V - HV system with Voltage ontrol ircuitry ome HV manufacturers are designing HV ystems with 5-18 vdc control circuits. tandard 24 vac thermostats will not work on these systems. hese systems can only be controlled with their own thermostat. ut the connections on a U4 are all dry contacts! Virtually any HV low voltage control circuit can be connected and controlled. ll you have to do is ask the manufacturer which numbered terminals correspond to the standard terminals. heoretical diagram only shown below. eothermal or round ource Packaged Heat Pump. 3 stage heat & 1 stage cool with type reversing valve U4 H /H LIK H V - Figure 18. ingle transformer 2 tage Heat / system High fficiency Heat Pump. 3 or 4 tage Heat and 2 tage ool LUXI High fficiency cclimate Heat Pump ystem. efer to fr s data for specific equipment dip switch settings and logical program settings. et up the U4 to control the staging based on ime with single stage onventional hermostats. r you can install 3 stage Heat Pump hermostats on all zones. Variable peed FU I HDL WIH High fficiency KUP H H PUP 2 W ut ut ut X/L W/ / HU X/L U4 Figure or 4 tage High fficiency Heat Pump ystem H /H LIK H V - ptional Humidistat ee fr s Data Figure 20. system with 5-18 vdc control circuit. IP : H PUP PI: ny hermostat can demand mergency ode! When emergency mode is activated, the U4 will energize the output terminal and the terminal. he terminal will also energize after a 3 minute delay. here is no need to jumper the terminal to the W terminals. he U4 does this to ensure that the mergency backup system energizes, regardless of which terminal it is connected to. In fact, the design of the U4 encourages you to separate up to three (3) electric strip banks, preventing large in-rush currents when all banks are tied together. his will also reserve at least one bank dedicated for mergency mode and Dehumidify/eheat operations. ake sure that you have correctly selected either Dual Fuel or onventional Heat Pump to obtain the proper staging operations for your particular system. Warning: ll of the wiring diagrams provided are general in nature and may not perfectly match your particular application. his is due to differences in the HV fr s terminal designations and functions! Variations on these diagrams and other ystem or hermostat applications are available by contacting the W echnical upport Hotline, or visit our web site at W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 13

14 WII IUD - pecialty pplications he uxiliary Feature Using the U4 s uxiliary Feature to control Dehumidify perations can be used to activate DeHumidify perations on Variable peed I HDL Variable or onstant U4 with 1 or 2 stage Heat D peed HV ystems. DHUIDIFII PILI U he U4 can be set up 1 or 2 X H PUP to control DeHumidify L DH operations on most any H e a t P u m p o r H onventional HV V system. he U4 will also activate a unique W - Dehumidify ontrol lgorithm when the Dehumidify demand is d e t e c t e d. W h e n a H separate control calls for Dehumidification, the HU /H U4 will activate, LIK and the uxiliary elay, to signal the ir Handler to slow the fan Figure 21. down. Wiring for typical 4 stage Heat,2 stage cool Heat Pump. Diagram reflects De-humidification he U4 WILL L terminal wired to the uxiliary output () ormally losed terminal. uxiliary elay Dip e n e r g i z e t h e ( ) witch #5, ank #2, should be set to () everse cting when using the type of control shown below. m e r g e n c y o u t p u t terminal to H the cold discharge air and arrier ryant apidly Dehumidify the 1 home. nergizing the ' HIDI 3 Heat 2 ool H PUP during this cycle FIUI prevents over-cooling the home. common / W / / / / DHU ustomer complaint with the DeHumidify cycle in / these HV systems. 1: he U4 will n o t a c t i v a t e dehumidify operations unless the (cool) signal is also detected at one 1. 2: cooling or h e a t i n g d e m a n d UX detected at any other zone can cause a delay 2 his type of control uses () reverse acting logic to signal De-humidify demands. to activate or will 2 terminate the De- Figure 22. Humidify operations. 3: Dehumidify can Wiring for typical 3 stage Heat,2stage cool Heat Pump. Diagram reflects De-humidification terminal wired to the uxiliary input. uxiliary elay Dip witch #5, ank #2, should be set only be achieved In () to () everse cting. ontact W ontrols echnical support or visit our web site for everse acting mode. additional diagrams and alternate control methods to achieve De-humidification. 14 W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com

15 WII IUD - pecialty pplications 1 or 2 D Figure 23. Using the U4 s uxiliary Feature to control Fan peed Variable peed FU with 1 or 2 stage Heat D/K HU H /H LIK U4 Wiring for typical 2 stage Heat,2 stage cool as Furnace.. Diagram reflects D/K terminal wired to the uxiliary output () ormally losed terminal. uxiliary elay Dip witch #5, ank #2, should be set to () everse cting when using the type of control shown. 1 ' / / 2 Heat 2 ool hermostat U X L H V - he uxiliary Feature can also be used to ontrol the Fan speed based on the umber of ones calling. he U4 can be set up to control the fan speed on most any variable speed air handlers or furnaces during cooling operations. he U4 will lower the fan speed when 25% or less of the total zones are calling for cooling. When this occurs the U4 will activate the uxiliary relay output which will de-energize the D/K terminal on the Forced air unit resulting in the blower running at a lower speed. 1: jumper is required across the terminal on zone 1 and the UX terminal. 2 : t h e r configurations are available. ontact echnical upport for further information. UX JUP QUID 2 2 Figure 24. Wiring for typical 2 stage Heat, 2 stage cool hermostat. Diagram reflects UX terminal wired with a jumper to the terminal. uxiliary elay Dip witch #5, ank #2, should be set to () everse cting. W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 15

16 WII IUD - pecialty pplications he uxiliary Feature Using the U4 s uxiliary Feature to control Humidify perations can be used to control Humidify perations 2000/2020 HUIDIFI on any HV ystem. 1 2 H H et the uxiliary relay U4 Dip witch to Direct U cting and connect a dry X contact Humidity ontrol 1 or 2 L to the and UX DI terminals. UI When the U4 detects H V a demand to Humidify, it w i l l e n e r g i z e t h e - uxiliary utput elay. he uxiliary relay contacts are dry, so you can connect and control WI H most any humidifier you QUID want. U DI Variable or onstant peed UI! hese drawings show FU /H with 1 or 2 stage H LIK an Ultra-one and 1 or 2 stage L mart Humidistat connected to the uxiliary Input, and Figure 25. an 2000/2020 team Wiring for typical 2 stage Heat,2 stage cool conventional HV ystem. Diagram Humidifier connected to reflects Humidification terminal wired to the uxiliary output () ormally pen the uxiliary utput. terminal. uxiliary elay Dip witch #5, ank #2, should be set to Direct cting. (D) efer to the echnical ulletins on the Ultra- one 2000/2020 and 1 2 Heat 2 ool t h e m a r t ' FIUI Humidistat for additional details. he U4 humidity / control logic allows a Humidity demand to occur at any time. here / is no need for a Heating demand to occur first. ear this in mind when field wiring your system. o u m a y h a v e t o interlock your Humidifier to run during a heating c a l l o n l y! t e a m Humidifiers can run at UX any time and do not 2 r e q u i r e a h e a t i n g D D H H 2 demand to occur first. o Ultra-one HUIDI : H u m i d i f y Figure 26. operations can only be Wiring for typical 2 stage Heat,2 stage cool onventional HV ystem. Diagram achieved in (D) reflects a Direct cting Humidification control wired to the uxiliary input. uxiliary elay Dip witch #5, ank #2, should be set to Direct cting. (D) efer to the Ultra-one Direct acting mode ech. ulletin. 16 W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com

17 WII IUD - pecialty pplications he U4 features a 2 onitoring interlock system that will activate a Fresh ir Damper and the indoor Fan on the HV system in response to a eparate 2 onitor. his powerful feature allows Demand ased Ventilation of a large h o m e o r c o m m e r c i a l building, based on the daily occupancy levels. Demand ased Ventilation saves energy, reduces overventilation, and optimizes air quality in the building. Wire up the U4 to a separate 2 onitor with auxilary dry contacts as shown. lso install and wire up a fresh air damper as shown. et the PP trip threshold on the 2 onitor per the fr s. Instructions or local requirements. Upon activation, the U4 will open the Fresh ir Damper and tart the Indoor Fan if it is not already running. he U4 will continue the ventilation process, until the 2 onitor resets. ther devices can be connected to the 2 terminals such as a lock imer, anual witch or nthalpy ontrol. : ooling & Heating operations are not affected by activation of this feature. : ctivation of the Fire larm Interlock Feature will over-ride (shutdown) the fresh air ventilation process. Using the U4 s 2 Feature to satisfy uilding Fresh ir Ventilation odes Figure ' - / / UX 2 2 W ontrols pring eturn otor ctuator ommercial rade hermostat H #1 his diagram reflects the U4 2 terminals wired to the () normally open contacts of a third party device. he circuit is normally open and the contacts must close to activate this feature. his feature operates regardless of all other functions except the FI ode interlock. U4 his diagram reflects the U4 DP utput terminals wired to an Ultraone pring losed type damper. When the U4 detects a Ventilation Demand, it will energize the damper open and force the Indoor Fan to run. he U4 will stay in this mode until the 2 onitor detects an acceptable 2 level in the building. Figure 28. his Damper ctuator is wired to Power P and pring L Power P & Power L dampers can also be used. D P D U X L U / 2 onitor W ontrols Inc. 385 Highway 33 nglishtown, J FX ail- info@ewccontrols.com 17

18 WII IUD - pecialty pplications he U4 has a FI interlock feature that allows the U4 to satisfy HV Fire ode in esidential & o m m e r c i a l b u i l d i n g s. oordinate with the Fire y s t e m s o n t r a c t o r t o interlock the U4 into the building Fire larm system as shown and cut the Jumper 1. When properly interlocked to the buildings Fire larm system, the U4 becomes an integral part of the Fire afety ystem. If the Fire larm system activates, the U4 will shutdown the controlled HV system and force all connected dampers to t h e c l o s e d p o s i t i o n s, effectively isolating the duct work and the Fan system. his action will reduce the spread of smoke advancing through the building assisted by Fan and Duct systems that are not interlocked with a Fire larm system, or equipped with the capability to do so. Using the U4 s FI Interlock Feature to satisfy uilding Fire odes FI L o Line Voltage Provide over current protection Figure 29. eparate 24vac ransformer F F 24V 24V X X U4 U his diagram reflects the U4 Fire larm utput terminals wired to a FI L ystem with a Fail afe, ormally pen Dry ontact. he circuit is normally closed and must P to activate the U4 FI D. e sure to cut the Jumper 1 resistor when you interlock the U4 to the Fire larm ystem. When the U4 activates Fire ode, the HV ystem will shutdown and all connected dampers will close to Isolate & ompartmentalize the HV Duct ystem. he Fire larm ystem must reset to L before the U4 will allow HV perations to resume. JP1 1 he U4 has a set of dedicated terminals to power up and control an (D) lectronic ypass Damper. he U4 will assume control of the D and force it to the P position during the Idle periods, hort cycle delays or hangeover delays. It will also maintain that open position for 45 seconds at the start of any thermostat demand for Heating, ooling, or Fan only operation. fter 45 seconds the U4 will release control of the D, resulting in a smooth gradual increase in static pressure. he 45 second startup delay allows a onstant speed fan to start in a Quiet ode eliminating air noise upon system startup. It also eliminates hunting on variable speed systems and it enhances the latent cooling capacity of any HV system. 18 D otor Figure 30. Using the U4 s D P DP UPP W ontrols Inc. 385 Highway 33 nglishtown, J FX D WHI WI Pressure ontrol Wiring ompartment WI U Field Wiring = Factory Wiring = -ail- info@ewccontrols.com U4 Wire up the D straight to the U4 to obtain integrated ypass Damper operational support via the U4 s bypass firmware. he U4 defaults the bypass damper open during idle periods and releases control to the D 45 seconds after the Fan starts. his action results in a smooth, quiet startup and gradual increase in static pressure. D P D U X L