Installation Instructions
Contents
1. Easy Setup 16 Switch Bank UZC4 OF n 43 140 Link HVAC ZONE 14 DI on 40 46 130 150 T S 7 as 37 ag 120 160 Polarized TEM 110 170 Power OFF 42 34 52 JMP1 STAGING COOLING 1ST STAGE MULTI STAG HEAT R64 Input TIMER _ 7 OAS LIMIT HEATING LIMIT DIFFI NTIAL Terminals 751 p R2 R3 fa FA Q ci c2 c54 css i S Supply FA SN ife R66 E ly Resettable Rez ces Outside Circuit N24V SS R ei d Res N amp Return Breaker with 24V SS C On oo n E Reo c26 S Air Sensor LED fault LED19 g 2 ES amp S R70 Oo Terminal indicator RESE R71 c27 R m 4 0 amp mg GROUND FAULT SC s Blocks CB1 2 R MXR D 5 SWITCH LEGEND BANKI 73 K Mxc A E1 JMP2 HP lt system gt cas pm u r nes R74 TB ISOLATING M6 e x DF HP CONV m o Corso pel R75 c28 DAMPER A zZz 2 OFF lt FAN PRG gt ON o m R31 nas E M4 SE 9 s lt PURGE gt 18 s O m 1832 oz R76 T POWER A O OAS2. Diagram reflects a Heat Pump with a B type Reversing Valve NOT a neutral or Common terminal designated as B Figure 16 Conventional Heat Pump System Dual Fuel Hi Efficiency Heat Pump with built in Outside Heat Pum p Air Changeover Capability The Heat Pump makes the decision to run the Furnace Note that the UZC4 can still operate the furnace in Emergency Mode with O Type Reversing Valve GAS OR OIL FORCED AIR FURNACE BACKUP HEAT z G N O K m a M ee mm P HEAT PUMP 1 STAGE zmado o o cr 22 2 2202 2 22 Figure 17 Single stage heat pump and single stage furnace Note that a Conventional amp Dual fuel heat pump could wire up more or less the same The difference is how staged heat operates In a Conventional system the indoor fan amp the compressor continues to run when stage up occurs In a Dual Fuel system the indoor fan amp the compressor shuts down when stage up occurs The UZC4 will perform these functions automatically All you have to do is set the dip switches to the correct settings Select DF or CONV at dip switch 2 Bank 1 Choose to activate 2nd stage heat by TIMER or by OUTSIDE AIR TEMPERATURE Optional Sensor Required You can also use Multi stage thermostats in any or all Zones When the thermostat stage up heat deman
3. The UZC4 includes support for an Electronic Bypass Damper Wire up a EWC Model EBD Bypass Damper to achieve precise control of the HVAC system static pressure and bypass damper operations Wire up the Model EBD damper as shown on page 17 The UZCA defaults the Bypass Damper to the Open position during IDLE periods It will also maintain that position for 45 seconds at the start of any thermostat demand for Heating Cooling or Fan only Operation The 45 second time delay allows a constant or variable speed fan to start in a Quiet Mode and does away with noisy air duct velocities upon system startup A Latent cooling effect is also achieved by using this feature After 45 seconds the UZCA will release control of the system static pressure to the EBD diaphragm control and a gradual increase in system static pressure is achieved NOTE The UZC4 will not resume control of the EBD until the next IDLE period begins EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 e 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com 3 UZC4 ADVANCED FIRMWARE AND HARDWARE FEATURES CONTINUED ULTRA ZONE RETURN AIR MONITORING FEATURE Enhanced HVAC System Safety and Energy Savings Solution Note If this feature is Enabled but the RAS is not connected or is not detected The RAS LED will blink rapidly as a warning and The UZC4 will not allow R
4. 18 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com DAMPER WIRING AND CONFIGURATION Note All zone dampers default to the OPEN position after a purge delay has occurred Dampers also default OPEN during changeover amp short cycle delays and when all zone demands are satisfied and no signals are detected from the thermostats REFERENCE THESE DIAGRAMS PRIOR TO INSTALLATION AND POWER WIRING DOING SO WILL SAVE TIME AND LABOR ON THE JOB SITE ZONE MODULE DAMPER MOTOR TERMINAL BLOCK DESIGNATION amp FUNCTION 6 Terminal M6 24vac to Close a damper s M TerminalM4 24vac to Open a damper s M M M Terminal M2 Constant 24vac HOT Terminal MM Common 24vac 1 TM add Figure 31 All Models MA ND amp MA URD Damper Wiring 2 7 0T N r ie SZ E MISO l em I MISNI v M S E Patented Optical ne Damper Motor Actuators M 7 Figure 32 All Models SMDL amp BMDL Damper Wiring 277 TN f N M6 M4 M2 Patented Optical Damper Motor Actuators Figure 33 2 Wire Spring Return Motor Wiring EWC Controls Spring Return Motor Wiring NCNOC MM Auxilary SPDT End Switch Dry Contacts Rated for 24vac only A Spring Open Damper is wired to M1 amp M6 A Spring Clos Damper is wired to M1
5. Definitions are explained below Short Cycle Timer Adip switch is provided to enable automatic fan operation in heat mode Useful for straight electric heat or hydronic heat applications NOTE Fan mode is automatically set when Heat Pump is selected The panel has built in delay timers that insure safe amp reliable operation Short Cycle Timer 3 minutes Fixed Changeover Timer 4 minutes Fixed Inter stage Timer 2 minutes Fixed Opposite Mode 20 minutes Fixed Delay Timer Staging Timer 7 to 42 minutes OAS Setting or7 to42 F Supply Return 3 minutes Fixed Air Limit Delay Timer When all zone demands are satisfied the panel will not resume the same mode operation fora minimum of 3 minutes Changeover Timer When a demand to Change Over has been honored A 4 minute delay timer prevents the system from rapidly changing between Heat to Cool or Cool to Heat mode Inter stage Timer Opposite Mode Delay Timer Staging Timer OAS 14 OFF 42 MULTISTAGE Timer OAS OFF or 7 to 42 minutes or 7 to 42 degrees F Use when Timer or Outside Air Changeover is required See Page 7 Supply Return Air Limit Delay Timer 2 minute time delay that occurs between thermostatic demands to stage up or down A 20 minute delay must expire or all active zone s must satisfy before the UZC4 will honor a thermostat demand to changeover to the opposite mode of system op
6. Technical Support Hotline when assistance is required Leave this Technical Bulletin with the Home or Building Owner for future reference CONTINUED ON NEXT PAGE EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com Selecting the Options Using the DIP Switches BANK1 HP SYSTEM GAS Choose the type of HVAC system you want to control Select HP if your system is any type of heat pump Select GAS if your system is a any type of Gas Oil furnace or any straight Electric furnace or Hydronic hot water steam heating system DF lt HP CONV If you chose HP at switch 1 then choose the type of Heat Pump you want to control Select DF if your system is a Dual Fuel heat pump with Gas or Oil furnace backup heat Select CONV if your system is a Conventional heat pump with Electric resistance backup supplemental heat Also applies to Ground source Geothermal heat pumps with Electric backup heat OFF lt FAN PRG gt ON Select ON if you want the UZCA to force the indoor blower ON at the end of a heat cool call to assist the zone purge cycle Selecting OFF will allow the HVAC system to operate the indoor blower without interference from the UZCA 90S PURGE gt 180S Select 90S or 1808S if you want the zone dampers to hold position for 90 seconds or 180 seconds at the end of any heat or cool call This allows the HVAC system to purge the remainin
7. Conventional GeoThermal or Dual Fuel A Systems Heat pumps without the need for dual fuel kits Also single or multi stage Gas Oil amp Hydronic HVAC systems with single or two stage cooling and Constant EMERGENCY or Variable speed fan systems e Compatible with most Off the shelf 1 or 2 Figure 1 Compatible stage Conventional Heat Cool or Heat Box Contents addo rss e Panel Thermostats pump Thermostats All Mechanical Sege IB wet THANG Digital Electronic Dual Mode and Internet x ec nica ulletin Compatible Thermostats that operate on Mounting Hardware 24vac Battery powered or Power robbing S thermostats that draw less than 20 ma of Manual ves SE es E a dee current are also compatible Zone 1 will and EU ju rea SS WI a e accept One Zone Mode Carbon Dioxide Automatic ault Indicator that protects a Safety and Auxiliary Dehumidify mode Th l connected modules and thermostat inputs See pages 9 11 amp 14 17 for details erma circuitry All modules have separate Automatic The UZC4 Zone system features Circuit damper motor Thermal Breakers too They protect the damper motor circuit Heat Cool a ET m pie PIGSRGES gree in a ele wiring ie Changeover EES breakers will not protect against shorts comfort from the HVAC system in the HVAC system wiring Status LED The STATUS LED pulses as a steady heart beat to indicate active Micro CAUTION When the thermal processor status breaker is tripped it will get quite Mm hot To reset
8. E Mail info ewccontrols com UZC4 ADVANCED FIRMWARE AND HARDWARE FEATURES CONTINUED FIRE ALARM INTERLOCK FEATURE Compliant Support Fire Alarm Activation Over rides ALL functions and features All Connected Dampers will close and the HVAC system will shut down Demand Based Ventilation CO2 MONITOR amp FRESH AIR INTERFACE FEATURE ULTRA ZONE Building Code Compliant Support This feature is not affected by Heat Cool Operations Fire Alarm Activation Over rides this feature The UZC4 includes a Fire Alarm system interlock feature Wire the UZC4 into your building Fire Alarm system and achieve full HVAC system shutdown and Closure of all Duct dampers in the event of Fire Mode Activation The circuit is normally closed and must open to activate this mode A Fail Safe dry contact is required on the Fire Alarm System When the Fire alarm system resets to normal the UZC4 will also resume normal operation Clip the on board jumper and wire as shown on page 17 The UZC4 includes a Carbon Dioxide and Fresh Air interface feature Wire the UZC4 up to a separate CO2 Monitor with auxilary dry contacts When the CO2 Monitor activates the UZC4 will open a fresh air damper connected to it s OA damper terminal block and start the HVAC system fan The circuit is normally open and must close to activate this mode A normally open dry contact is required on the C02 Monitor or Fresh air
9. Systems The UZC4 can be set up to control DeHumidify operations on most any Heat Pump or Conventional HVAC system The UZC4 will also activate a unique Dehumidify Control Algorithm when the De humidify demand is detected When a separate control calls for Dehumidification the UZC4 will activate Y1 G and the Auxiliary Relay to signal the Air Handler to slow the fan down The UZC4 WILL ALSO energize the E Emergency output terminal to REHEAT the cold discharge air and Rapidly Dehumidify the home Energizing the E during this cycle prevents over cooling the home A common Customer complaint with the DeHumidify cycle in these HVAC systems NOTE1 The UZC4 will not activate dehumidify operations unless the Y1 cool signal is also detected at Zone f NOTE2 A cooling or heating demand detected at any other zone can cause a delay to activate or will terminate the De Humidify operations NOTE3 Dehumidify can only be achieved In RA Reverse acting mode Using the UZC4 s Auxiliary Feature to control Dehumidify Operations Variable Speed AIR HANDLER with 1 or 2 stage Heat AND DEHUMIDIFICATION CAPABILITY 1 or 2 STAGE HEAT PUMP 28m Svcvot o QIP S ooo zm do o o r HUM Figure 21 Wiring for typical 4 stage Heat 2 stage cool Heat Pump Diagram reflects De humidification terminal wired to the Auxiliary output NC Normally Closed terminal Auxiliary
10. and Compressor 1 and 2 have been locked out This is done in response to a demand from any Heat Pump thermostat connected to any zone It can also be activated via the On board Emergency switch When Emergency mode is activated the W1 amp W2 LED s will also illuminate GROUND FAULT The GROUND FAULT LED illuminates when the Circuit Breaker Trips due to an electrical short in the thermostat field wiring or possibly in the main module damper field wiring The electrical short must be located and repaired before the circuit breaker can be reset to normal EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com ZXM2 FEATURES AT A GLANCE POLARIZED TERMINAL BLOCK amp 2 5 am BREAKER Rugged Damper Motor Terminal Blocks with ZONE ID blocks R44 4 Switch ZONE ADDRESS Bank Rugged 10 pin Expansion Header Bus Cable not shown for clarity The ZXM2 Expansion Module for the UZC4 series is pictured above A total of eight 8 ZXM2 s can be connected to the UZC4 to create a 20 ZONE system The modules are housed and linked together via a factory supplied 10 conductor BUS CABLE and a unique Expansion Header Card The UZC4 expands by connecting factory assembled Expansion Systems such as the ZXM2A ZXM4A and ZXM6A that are pre wired a
11. cycled off and the fan continues to run allowing the heat exchanger or coil to cool down The Adjustable Multistage Heat differential potentiometer sets the 2nd and or 3rd amp 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 NOTE Allows the supply air sensor to be installed in the supply air plenum regardless of the coil neat exchanger configuration Allows the installer to fine tune virtually any multistage heating system Momentarily pressing the TIMER RESET button will clear any Active Time Delay This enables you to test and certify the installation faster NOTE Do not use sharp objects to press the button Use your finger tip or the eraser head of a pencil Press amp Hold the SYSTEM RESET button for 5 seconds That will reset the Main amp Expansion modules on a UZCA Zoning System NOTE A three minute startup delay occurs whenever the CPU Reset button is pushed upon any initial power up or when a power failure has occurred An On Board Switch is provided that allows the user to set the system to the Emergency heat mode This switch is shown in the NORMAL position NOTE An Emergency terminal is also provided at every Thermostat terminal block allowing Heat Pump Thermostats to be connected to every zone EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e
12. gt 2 sO lt RV gt B rs OFF lt ZDL gt ON RA lt AUXRLY gt DA rs OFF lt RAS gt ON s0 lt RALIMIT gt 10 ANY lt FAN CTRL gt Z1 ss 4 2 3 4 5 6 7 8 FS Factory Settings RECORD YOUR DIP SWITCH SETTINGS HERE Programming and setting up the UZCA is very easy Check the Switch Legend and refer to the following pages for an explanation of each dip switch function and choose your settings Some functions may not apply to your application Use a pencil to fill in the square amp record your settings f the settings get changed later on you will have a record of the original settings NOTE When you choose HP at switch 1 Bank 1 the fan mode is automatically set for you There is no need to move switch 8 Bank Leave itin the GAS factory setting RECORD YOUR DIP SWITCH SETTINGS HERE Detailed explanations of each Dip Switch Function are included on the following pages Please study and familiarize yourself with all of the functions and features prior to activating the Zoned HVAC system Not all features will apply to your application The UZC4 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 HVAC System Please read and study the entire Technical Bulletin and if necessary Call the EWC
13. mode is activated the UZC4 will energize the E output terminal and the W1 terminal The W2 terminal will also energize after a 3 minute delay There is no need to jumper the E terminal to the W terminals The UZC4 does this to ensure that the Emergency backup system energizes regardless of which terminal it is connected to In fact the design of the UZC4 encourages you to separate up to three 3 electric strip banks preventing large in rush currents when all banks are tied together This will also reserve at least one bank dedicated for Emergency mode and De humidify Reheat operations Make sure that you have correctly selected either Dual Fuel or Conventional Heat Pump to obtain the proper staging operations for your particular system Warning All of the wiring diagrams provided are general in nature and may not perfectly match your particular application This is due to differences in the HVAC Mfr s terminal designations and functions Variations on these diagrams and other System or Thermostat applications are available by contacting the EWC Technical Support Hotline or visit our web site at www ewccontrols com EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 e 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com 13 SYSTEM WIRING CONTINUED Specialty Applications The Auxiliary Feature can be used to activate DeHumidify Operations on Variable or Constant Speed HVAC
14. A Reverse Acting for De Humidification Control or Choose DA Direct Acting for Humidification Control depending on the control input signal you require Then connect your controlled device or circuit to the SPDT 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 DA position See Pages 14 16 for further information OFF RAS ON If you connect an OPTIONAL Return Air Sensor to the UZCA then Select ON and Choose to use the default set points for Return Air Temperature Limit Operations or choose to Offset those set points by 10 degrees higher at the next Dip Switch Refer to the data sheet included with the Return air sensor for installation details Mount the Return Air Sensor in the return air duct as close to the Blower intake as possible or in the blower cabinet Read page 4 for Operational details 0 RALIMIT gt 10 If you connect an OPTIONAL Return Air Sensor and switch on the RAS switch above then choose 0 to accept the default set points for Return Air Temperature Limits or choose 10 to Offset the default set points 10 degrees higher Refer to the data sheet included with the Return air sensor for installation details Read page 4 for Operational details ANY FAN CTRL gt Z1 Select which thermostat s can activate a demand for Continuous Fan Operation Choose ANY and the UZCA
15. AS operations to occur Note When the Return Air sensor detects a return air temperature between the Stage Up Value and the Stage Down Value the RAS LED will blink slowly as a warning The UZC4 will also hold at the current staging until the system status changes sufficiently to allow a stage up or down The UZC4 includes a RETURN AIR TEMPERATURE SENSING feature Connect an OPTIONAL Return Air Sensor RAS to the UZC4 and achieve the ability to STAGE DOWN the HVAC system if the return air temperature exceeds the return air temperature limit set points Set the RAS Dipswitch 6 to the ON position and choose either 0 or 10 at the RA LIMIT Dipswitch 7 Both switches are located on the Dipswitch Bank 2 The UZC4 will now monitor the return air temperature and allow Stage up or if necessary Stage Down the cooling or heating operation to maintain a return air temperature within the following values As stated above choose either 0 to accept the default return air limit values for your particular HVAC system or choose 10 to offset the default values 10 degrees higher Note The 10 offset applies to heating operations only The default return air temperature limit set points for cooling operations cannot be offset RETURNAIR LIMITS DURING HEATING CYCLE FOR HEAT PUMPS ONLY Default 0 set points Ifthe Return Air temperature is 80 degree F or below Stage Upis allowed 105 degree F o
16. ED RED RED 22 OAS The OAS LIMIT LED illuminates solid to indicate that the Outdoor Temperature has fallen below the chosen set point LED will blink rapidly to indicate a malfunctioning Outdoor Air Sensor SAS The SAS LIMIT LED illuminates solid to indicate that the Supply Temperature has exceeded the chosen set point on either the HIGH TEMP LIMIT or the LOW TEMP LIMIT LED will blink rapidly to indicate a malfunctioning Supply Air Sensor RAS The RAS LIMIT LED illuminates solid to indicate that the Return Temperature has exceeded the chosen set point LED will blink rapidly to indicate a malfunctioning Return Air Sensor ZONE 4 OPEN ZONE 4 LED will iluminate solid to indicate that damper s is energized open and the Zone is active ZONE 3 OPEN ZONE 3 LED will iluminate solid to indicate that damper s is energized open and the Zone is active ZONE 2 OPEN ZONE 2 LED will illuminate solid to indicate that damper s is energized open and the Zone is active ZONE 1 OPEN ZONE 1 LED will illuminate solid to indicate that damper s is energized open and the Zone is active OA DMPR OPEN The OA DMPR OPEN LED will illuminate solid to indicate that the Outside Air damper is energized open in response to the CO2 detector or other device to provide demand based ventilation BYPASS DMPR The BYPASS DMPR LED will illuminate solid to indicate that the Bypass damper s is being forced to the Open position Occurs during idle short cycle and changeove
17. Excellence Without Compromise ULTRA ZONE Forced Air Zone Controls o CONTROLS INC The UZC4 Universal Zone Control System allows you to easily upgrade an inefficient single zone HVAC system into an Automated Multi zone Energy saving Comfort producing Safety Minded HVAC system With Superior design Intuitive firmware Building Code Compliant support Simple setup options and Easy to understand wiring the UZC4 Zoning system is the Designer Contractors dream Combined with DECHNICAHBULLEIIN Model UZC4 Zone Control Leave this bulletin on the job site for future reference ex00zmo Patented EWC motorized dampers and practically any Off the shelf Conventional or Heat Pump style Thermostats Be EWC has set a New Industry Standard in Large z Residential and Commercial HVAC Air Zoning Systems A Zone The main module controls four air zones xs Capacity using 24 vac motorized air dampers and may be expanded up to 20 zones using T ZXM2 Expansion Modules See page 23 Compatible The UZC4 will Control 2 3 amp 4 stage sl HVAC
18. One Zone Terminal HEAT PUMP MODE WITH DE HUMIDIFICATION Carrier Bryant THERMIDISTAT 2 Heat 1 Cool HEAT PUMP CONFIGURATION Refer to Dehumidify J Operations on page 14 Sse Figure 12 Wiring for typical 2 stage Heat 1 stage cool Heat Pump Diagram reflects De humidification terminal wired to the Auxilary input For auxilary output wiring see page 14 Auxilary Relay Dip Switch 5 Bank 2 should be set to Reverse Acting RA MODEL IZT 250 INTERNET THERMOSTAT Model IZT 250 Internet Thermostat Configured for 2 heat 2 cool See thermostat instructions for further details Figure 13 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com 11 HVAC SYSTEM WIRING Single Typical gas oil system with A C Transformer A jumper wire between Rc and Rh is Gas Oil Systems provided There is no need to install 1 or 2 Stage Heat a jumper ef GAS OIL a N Furnace 1or2 STAGE OUTDOOR CONDENSING Tt UNIT G Deg Y ZO wi C l l l l TL Figure 14 Single transformer Gas A C system Two Wiring diagram for a typical oil burner Transformer hydronic zone Air handler with A C Oil Hydro Cut the Rc Rh link on the
19. Relay Dip Switch 5 Bank 2 should be set to RA Reverse Acting when using the type of control shown below Carrier Bryant THERMIDISTAT 3 Heat 2 Cool HEAT PUMP CONFIGURATION This type of control uses RA reverse acting logic to signal De humidify demands Figure 22 Wiring for typical 3 stage Heat 2stage cool Heat Pump Diagram reflects De humidification terminal wired to the Auxiliary input Auxiliary Relay Dip Switch 5 Bank 2 should be set to RA Reverse Acting Contact EWC Controls Technical support or visit our web site for additional diagrams and alternate control methods to achieve De humidification EWC Controls Inc 385 Highway 33 Englishtown NJ 07726 e 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com SYSTEM WIRING CONTINUED Specialty Applications Using the UZC4 s Auxiliary Feature to control Fan Speed The Auxiliary Feature can also be used to Control the Fan speed based on the Number Variable Speed of Zones calling FURNACE 1 or 2 STAGE with 1 or 2 stage Heat The UZC4 can be set up CONDENSOR to control the fan speed on most any variable speed air handlers or furnaces during cooling operations The UZC4 will lower the fan speed when 25 or less of the total zones are calling for cooling When this occurs the UZC4 will activate the Auxiliary relay output which will de energize the DS BK terminal on the Forced air unit resulting in the blower running at a Wir
20. T RECIEVER MODULE MODEL EWT 3900 8 Le ws wal o j v1 v2 R Le erf Es ssar WIRELESS THERMOSTAT RECIEVER MODULE MODEL EWT 3900 B c wt wa o v1 v2 R 6 ANY ZONE Figure 7 Model EWT 3900 Wireless Thermostat Configured for 2 heat 2 cool MS2 mode Figure 9 Model EWT 3900 Wireless Thermostat See Thermostat instructions for further details Configured for 3 heat 2 cool heat pump HP2 Mode See thermostat instructions for further Details EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 e 800 446 3110 e FAX 732 446 5362 e E Mail info ewccontrols com WIRING FOR RADIANT FLOOR HEAT MODEL EWT 3611 LG RH W To Radiant floor Baseboard heat Zone valve or pump relay Figure 10 Wiring a split circuit thermostat to operate a Radiant floor heating or Baseboard heating Hydronic system The UZC4 controls the cooling only in this type of configuration WIRING FOR ONE ZONE MODE Commercial Grade Thermostat ZONE THERMOSTAT 1 LR G al Senne Figure 11 Wiring for automatic activation of One Zone mode using a commercial grade thermostat in Zone 1 Program or wire the thermostat to Energize close contact the One Zone Terminal and setback the temperature when the building is Unoccupied When the building is Occupied the thermostat will de energize open contact the
21. T W1 E rg ZONE 2 OPEN EU Lep7 R116 S W2 9c zs Fd zowE10PEN Emi mrC Uess T O B G H CADMPR OPEN Ee musl vi Isolated v Ra BYPASS DMPR Emy LED10 R119 cas A solate Y2 D13 R120 T Y2 B HVAC v1 A AUX RELAY E LED GC Multi System Cc ZS FH Fane ico ih 1 R Functional Terminal O COMPRESSOR2 En ec R122 G Zone 1 Block B s Ais COMPRESSOR En Lea u ea Thermostat 59 wi D14 REV VALVE O E3mieois Ln Terminal w Y FE R125 C47 ONE Block 2 Es wi HEAT E Hh LED16 R126 I ZONE E S rz C W2 HEAT EE LED17 R127 cas AUX R RC T t EMERGENCY EH Levis Ces R128 E D15 R52 za R134 R135 R129 l cag CO RH CT L1 1 Ea R130 CO M ES R53 R56 R130 c50 R132 On Board JMP3 R133 C51 l R54 R57 System C_I 1 EMERGENCY Rc Rh Link RC HRH a Rss Reo LINK SW3 R63 61 1 C WA CONTROLS INC NORMAL Englishtown NJ Figure 37 Heavy duty 10 amp Bright System Status LED s On Board contact rated relays Emergency Switch 21 UZC4 LED FUNCTION AND DESCRIPTION UZC4 The UZC4 is equipped with 18 LED s which indicate system operation and status Familiarize yourself with the LED s definitions in orderto quickly determine the system status and mode of LED s operation POWER The POWER LED pulses as a steady heart beat to indicate proper Microprocessor operation E E o z 9 E x o 9 o o o o 2 D m a E E E E a S m E m m m m m m a 6 Oo o m A m m m m m Q z z 9 z z z E 5 E el m GREEN E o R
22. TAT TOUCHSCREEN THERMOSTAT MODEL EWT 3102 st s2 L c wtl wa E Y1 Z2 R G n n n i zk Common wire not required if batteries are used Model EWT 3102 Configured for typical 2 stage Gas or Electric heating system with 2 stage cooling All of the preceding diagrams reflect conventional Non Heat Pump thermostats controlling conventional HVAC systems However the equipment being controlled does not have to be the conventional type A heat pump system can be controlled using conventional thermostats But you cannot control a conventional system using heat pump thermostats Figure 5 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com THERMOSTAT WIRING CONTINUED TOUCHSCREEN THERMOSTAT MODEL EWT 3102 TOUCHSCREEN THERMOSTAT MODEL EWT 3102 s1 s2 t c E wa ore 4 R L e v2 a BR a ANY ZONE 2c Common wire not required if batteries are used Field installed jumper A Common wire not required if batteries are used Zeck Field installed jumper Figure 6 Model EWT 3102 Configured for 2 heat 1 cool Figure 8 Model EWT 3102 Configured for 3 heat 2 cool heat pump HP1 mode See thermostat heat pump HP2 mode See thermostat instructions for further details instructions for further details WIRELESS THERMOSTA
23. TE Activation of the Fire Alarm Interlock Feature will over ride shutdown the fresh air ventilation process Using the UZC4 s CO2 Feature to satisfy Building Fresh Air Ventilation Codes EWC Controls Spring Return Motor Actuator This Damper Actuator is wired to Power OPEN and Spring CLOSE Power OPEN amp Power CLOSE Figure 27 dampers can also be used This diagram reflects the UZC4 OA DMPR Output terminals wired to an UltraZone Spring Closed type damper When the UZC4 detects a Ventilation Demand it will energize the damper open and force the Indoor Fan to run The UZC4 will stay in this mode until the CO2 Monitor detects an acceptable CO2 level in the building Commercial Grade Thermostat ZONE THERMOSTAT 1 LC iw llwall Y JL RILG CO2 Monitor e Figure 28 This diagram reflects the UZC4 CO2 terminals wired to the NO normally open contacts of a third party device The circuit is normally open and the contacts must close to activate this feature This feature operates regardless of all other functions except the FIRE Mode interlock 17 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com SYSTEM WIRING CONTINUED Specialty Applications The UZC4 has a FIRE interlock feature that allows the UZC4 to satisfy HVAC Fire Code in Residentia
24. Timer or Other Device When the CO2 monitor resets to a normal CO2 level the UZC4 will close the fresh air auxilary damper Other external dry contact devices can be connected to the CO2 terminals such as a Manual Switch Enthalpy Control or ClockTimer See page 16 NOTE Cooling amp Heating operations are not affected by activation of this feature NOTE Activation of the Fire Alarm Interlock feature will over ride the CO2 Monitor feature UITRAZONE The UZC4 includes an Auxiliary AUXILARY or DeHUMIDIFY INTERFACE RELAY Enhanced Comfort Solution Auxiliary dry SPDT output This feature is affected by Heat Cool Operations Fire Alarm Activation Over rides this feature ULTRA ZONE ELECTRONIC BYPASS DAMPER SUPPORT FEATURE Enhanced Airflow Solution Fire Alarm Activation Over rides this feature Interface Input and SPDT action Dry Contact Output This allows the Installer to connect various Auxiliary controls such as Humidify or DeHumidify controls Simply connect the Controlled Device or Circuit to the Output dry contacts and achieve integrated control without 3rd party isolating relays See Page 14 and 15 for example control and wiring solutions The Auxiliary input logic can be field selected as DA Direct Acting to humidify or RA Reverse Acting to Dehumidify The UZC4 activates a unique algorithm to rapidly de humidify the home without over cooling it See page 14
25. UZC4 Systems Panel for systems requiring isolation pm TYPICAL FAN T N CENTER i TERMINAL OUTDOOR BLOCK UZC4 i CONDENSING I UNIT Ww WE oues co 1 va SG v YI G A I off Y ER C wil Sly wajG s l elteir Rd o E TO T RHLO I ISOLATION TERMINALS l OR WIRES l l gd Oil Wood Burner LINK y i Primary Control I _J or Boiler Control M or Zone Valve Cut Re Rh Pump Control Jumper Terminals Figure 15 Two transformer Oil or Hydronic A C system Note Your Air Handler may include a W terminal That means it may have it s own isolation circuit If you can confirm this simply connect the W1 terminal to the W terminal on the air handler Do not cut the Rc Rh jumper Wire up your Oil Burner Pump Control or Hydronic Zone valve to the isolation terminals or wires provided in the air handler follow dashed lines The fan is controlled via time delay relay inside the air handler or set the UZC4 FAN Dip Switch to the HYDRO position Conventional 4 Stage Heat Pump with a B Type Reversing Valve Typical heat pump system wiring with electric resistance backup heat Wire up the reversing valve to either O or B depending on your system type Applies to air cooled or geothermal ground source systems AIR HANDLER WITH 1 OR 2 STAGE ELECTRIC RESISTANCE BACKUP HEAT HEAT PUMP 2 STAGE e eleieieeeoe e zmMAuo xo o c r
26. VAC System Diagram reflects a Direct Acting Humidification control wired to the Auxiliary input Auxiliary Relay Dip Switch 5 Bank 2 should be set to Direct Acting DA Refer to the Ultra Zone 072000 Tech Bulletin EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 e 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com SYSTEM WIRING CONTINUED Specialty Applications The UZCA features a CO2 Monitoring interlock system that will activate a Fresh Air Damper and the indoor Fan on the HVAC system in response to a Separate CO2 Monitor This powerful feature allows Demand Based Ventilation of a large home or commercial building based on the daily occupancy levels Demand Based Ventilation saves energy reduces over ventilation and optimizes air quality in the building Wire up the UZC4 to a separate CO2 Monitor with auxilary dry contacts as shown Also install and wire up a fresh air damper as shown Set the PPM trip threshold on the CO2 Monitor per the Mfr s Instructions or local requirements Upon activation the UZC4 will open the Fresh Air Damper and Start the Indoor Fan if it is not already running The UZC4 will continue the ventilation process until the CO2 Monitor resets Other devices can be connected to the CO2 terminals such as a Clock Timer Manual Switch or Enthalpy Control NOTE Cooling amp Heating operations are not affected by activation ofthis feature NO
27. a Heat Pump NOTE3 Thermostat demands to stage up will always over ride the Timer or OAS staging operations unless the 50 rule has been enabled NOTE4 Thermostatic demands to stage down will be honored unless the Timer is in use IMPORTANT NOTE The UZCA Zone Control System allows Heat Pump or Conventional Multi Stage thermostats to be wired to all Zones Thermostat demands to stage up will always over ride any programmed staging operation The UZC4 will remain in Multi stage mode until that terminal is de energized If this occurs in dual fuel mode or emergency mode the UZC4 will stay in that mode until all Heating demands are satisfied On the next heating cycle the UZC4 will attempt to activate 1st stage heat unless Emergency Mode is still active or the outdoor temperature is low and OAS DF has been selected This comfort over ride feature provides true versatility to your zoning system and gives the homeowner comfort control capability over the system 1 lt CS gt 2 Choose the number of Condensing Unit Stages you want to control Select 1 if your CU has a Y1 connection only Select 2 if your CU has a Y1 amp Y2 connection NOTE1 This feature must be set correctly for proper Timed amp Outdoor Air Sensor staging operations NOTE2 Thermostat demands to stage up will always Over ride the Timer amp OAS staging operations unless the 50 rule has been enabled or the Return air temperature limit has been exceeded NOTE3 All stage u
28. a for 30r4 Stage Heat specific equipment dip switch settings and logical program settings Set up the UZC4 to and 2 Stage Cool control the staging based on Time with single stage Conventional Thermostats Or you can install 3 stage Heat Pump Thermostats on all zones Variable Speed FURNACE OR AIR HANDLER WITH 1 OR 2 STAGE High Efficiency BACKUP HEAT HEAT PUMP 2 STAGE Optional Humidistat See Mfr s Data Figure 19 3 or 4 Stage High Efficiency Heat Pump System HVAC system with OEM Voltage Control Circuitry Some HVAC manufacturers are designing HVAC Systems with 5 18 vdc control circuits Standard 24 vac thermostats will not work on these systems These systems can only be controlled with their own thermostat But the SYSTEM connections on a UZCA are all dry contacts Virtually any HVAC low voltage control circuit can be connected and controlled All you have to do is ask the manufacturer which numbered terminals correspond to the standard terminals Theoretical diagram only shown below OEM Geothermal or Ground Source Packaged Heat Pump 3 stage heat amp S 1 stage cool with O type reversing valve d Figure 20 OEM system with 5 18 vdc control circuit IMPORTANT NOTES HEAT PUMP EMERGENCY OPERATIONS Any Thermostat can demand Emergency Mode When emergency
29. air set point You 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 You can choose to control most any multi stage Heat Pump or Conventional HVAC system with OEM multi stage thermostats on all zones The UZC4 can be programmed to stage up or down based on the thermostat inputs from each zone The UZC4 allows a level of versatility that has never before been offered by any zoning company You 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 To achieve staging via thermostatic demand only Choose TMR Timer setting on Dipswitch 5 Bank 1 And then set the Multi Stage Timer setting to 0 Zero Setting the Timer to zero disables Timed Staging and the UZCA will stage up or down only when the thermostat s demand it EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com Selecting the Options Using the DIP Switches SWITCH LEGEND Bank1 rs HP lt SYSTEM gt GAS DF lt HP gt CONV rs OFF lt FAN PRG gt ON 90s lt PURGE gt 180s rs OAS lt STAGES gt TMR ss rsOFF 50 R gt ON rsOFF lt SAS gt ON rsGAS lt FAN gt HYDRO oN O oO A o mnm A OO HD EE HD a0 HEEL o0 OO Bank2 HC lt TSTATS gt Hr sel lt CS
30. amp M4 Figure 34 Multiple MA ND amp MA URD Damper Wiring on a Single Zone wem PT Ss Multiple dampers wired to operate together on a single zone Figure 35 On all these dampers and most older style dampers including competitor s dampers always wire up number to number Contact EWC Controls Technical Support when you are on the job site for assistance with damper wiring NOTE Some older style dampers cannot be wired in parallel Do not overload your transformer 19 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 e 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com DAMPER WIRING DAMPER TESTING AND POWER SUPPLY SOLUTIONS Unlike previous models the UZC4 series allows Damper Motor Power Isolation on the Main and Expansion modules The Main Module s motor blocks can be isolated only if necessary but the Expansion module motor blocks must be powered by a separate transformer This advanced design provides automatic 2 5amp over current protection for each Expansion module motor block and allows a maximum 60va transformer to be connected This means that you can directly connect a theoretical maximum of 12 Genuine ND URD dampers to a single 2 zone expansion module Now you no longer have to isolate amp power up multiple dampers using field installed relays The Expansion modules p
31. c SHORTS F1 circuit breaker protects the UZC4 and all connected modules Reacts to a short in the damper motor or thermostat component and field wiring TESTING CONVENTIONAL THERMOSTATS During a demand for heating the thermostat should apply a 24vac hot signal to the W1 and or W2 terminals SOLUTIONS Remove 24vac power from UZCA and reset the manual circuit breaker or allow the thermal breaker to cool off Find and repair short s in damper and or thermostat field wiring Restore 24 vac power Disconnect the wire s from the R terminals on the UZC4 thermostat terminal blocks and the M2 M4 M6 terminals on the UZC4 damper motor terminal blocks Restore power If the short is no longer present Ohm out the thermostat and damper field wiring for shorts misconnections Replace or repair wires as necessary Restore power Module s will resume operation During a demand for cooling the thermostat should apply a 24vac hot signal to the Y1 Y2 and G terminals During a continuous fan demand the thermostat should apply a 24vac hot signal to the G terminal Check to make sure that the thermostat Rc and Rh terminals are connected together unless your application requires separation of these circuits Use the C Common terminal provided at each thermostat terminal block to wire up full 24 vac hard wired thermostats You should reference the C Common terminal when troubleshooting incoming thermostat demand si
32. cal documentation and Mfr s Technical Support LED s are not responding properly and HVAC system is malfunctioning Check HVAC system wiring for shorts miswiring Check HVAC system wiring for proper connections Check HVAC thermostat for proper connections Refer to Technical Bulletin for correct Setup Wiring Dip Switch settings LED s illuminate and HVAC system functions normally but dampers do not respond Check damper motor wiring for proper connections Check damper motor 24vac transformer voltage fuse UZCA circuit breaker Check damper motor wiring for shorts miswiring Refer to Technical Bulletin for correct Setup Wiring REFER TO THE DAMPER MOTOR TESTING PAGE 8 Check HVAC UZCA system transformer supply voltage Check HVAC UZCA system 24vac transformer voltage fuse UZC4 circuit breaker Check the Fire Alarm system The UZCA will not operate if the fire alarm is active and the interlock is used 24vac can be read across an open FA circuit CHECK YOUR WIRING SYMPTOMS Modules Motors or both will not function If 24vac short has occurred 24vac will be present at the UZC4 Module Input terminals R amp C but 24vac will not be present at the Thermostat R amp C terminals The Ground Fault LED is illuminated LED s do not illuminate and HVAC system does not respond DETECTING 24vac SHORTS HVAC system not responding and UZC4 LED s are Off Dampers not responding and THE UZCA LED s are Off or On ISOLATING 24va
33. d is satisfied the UZC4 will stage down unless DF OAS has been selected and the outdoor temperature is lower than the OAS changeover setting In that case the system will continue in FUEL mode until all heating demands are fully satisfied Your Heat Pump may be capable of making these decisions without the aid of the UZC4 in which case you may elect to wire your system as shown in figure 17 12 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com SYSTEM WIRING CONTINUED Typical A C Split System 2 stage heat 2 stage cool Typical 2 stage gas or straight electric furnace with 2 stage cooling Choose Timer or Outside Air Sensor to delay 2nd stage or use 2 stage T stats on all zones 2 STAGE GAS 2 STAGE FURNACE OUTDOOR CONDENSING zmado o o cr R wire may not be required on your Outdoor Condensing Unit M NOU P Om OD Note that you can route a Common wire back to the System terminal block but it should never be connected Use it as a TEST point while troubleshooting It should be marked as such and remain capped off when not in use Figure 18 Single transformer 2 Stage Heat AC system High Efficiency LUXAIRE High Efficiency Acclimate Heat Heat Pump Pump System Refer to Mfr s dat
34. e up will not be affected by this setting Emergency mode is never affected by the 50 rule OFF SAS ON Select OFF if you do not want to use the Supply air sensor included with the UZC4 Zone Control system Select ON if you want to use the included Supply air sensor Refer to the data sheet included with the Supply air sensor for installation details Refer to page 2 for details on Supply air Sensing Limit Controls and settings Mount the Supply Air Sensor in the discharge duct and or plenum GAS FAN gt HYDRONIC Select GAS if your HVAC system is a gas or oil forced air furnace Select HYDRONIC if your HVAC 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 NOTE 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 GAS setting CONTINUED ON NEXT PAGE EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com Selecting the Options Using the DIP Switches BANK2 HC lt TSTAT gt HP Select the type of thermostats you want to use Select HC if your thermostats are the standard Heat Cool type Select HP if your thermostats are Heat Pump types NOTE1 You cannot mix thermostat types NOTE2 You do not need HP thermostats to control
35. e UZC4 s FIRE Interlock Feature to satisfy Building Fire Codes FIRE ALARM SYSTEM To Line Voltage Provide over current protection Separate 24vac Figure 29 Transformer This diagram reflects the UZC4 Fire Alarm Output terminals wired to a FIRE ALARM System with a Fail Safe Normally Open Dry Contact The circuit is normally closed and must OPEN to activate the UZC4 FIRE MODE Be sure to cut the Jumper 1 resistor when you interlock the UZC4 to the Fire Alarm System When the UZC4 activates Fire Mode the HVAC System will shutdown and all connected dampers will close to Isolate amp Compartmentalize the HVAC Duct System The Fire Alarm System must reset to NORMAL before the UZC4 will allow HVAC Operations to resume S DAMPER SUPPORT H 1 I L IN I Pressure Control Wiring Compartment NC M6 EBD Motor M M2 M1 alo al avzu 0 gom N ee M Le r5 egen well NC NO NO oe fo a INI WIRE WHITE COMMON WIRE Field Wiring Figure 30 Factory Wiring Wire up the EBD straight to the UZC4 to obtain integrated Bypass Damper operational support via the UZC4 s bypass firmware The UZC4 defaults the bypass damper open during idle periods and releases control to the EBD 45 seconds after the Fan starts This action results in a smooth quiet startup and gradual increase in static pressure
36. eration The delay is fixed amp cannot be changed or defeated The STAGING TIMER sets the amount of continuous amp cumulative call time in 1st stage before second stage heat or cool is energized Also applies to 3rd amp 4th stage heat NOTE The potentiometer also serves as the 2nd or 3rd stage Heat Outside Air Changeover Setting The UZC4 can inhibit 2nd or 3rd stage heat based on Time or Outside Air Temperature All staging scenarios depend upon the type of thermostat used See page 5 amp 7 for details NOTE An Optional OAS Sensor is required to use the OAS feature NOTE Y2 Output defaults to 30 minutes if OAS is chosen and single stage thermostats are used The time delay of 3 minutes must expire before the UZC4 will re energize heat or cool mode This occurs when the processor detects the supply or return air temperature is higher or lower than the Heat Cool limit settings Example Hi Temp limit 130 Plus M stg T 40 New limit F 170 Timer Reset BUTTON S TIMER RESET CPU Reset BUTTON H SYSTEM RESET Emergency Heat Switch NORM The Adjustable Cooling Limit potentiometer sets the supply air temperature at which the 1st amp 2nd stage cooling is cycled off and the fan continues to run allowing the coil to warm up The Adjustable Heating Limit potentiometer sets the 1st or 2nd stage heat supply air temperature at which the heating is
37. erform a unique de humidify function when a demand to de humidify is detected at the Auxilary Input terminal The UZC4 will energize the Emergency heat relay to activate one electric strip bank at the same time the Y1 cool is active so long as the demand to de humidify is detected This powerful feature will rapidly de humidify your home and tempers reheats the supply air to prevent over cooling See Page 14 for details CO2 DEMAND BASED VENTILATION SUPPORT The UZC4 includes support for Demand Based Ventilation Control scenarios Designed to help meet or exceed local building codes and ASHRAE ventilation standards Simply connect your CO2 Monitor and a Fresh Air damper to the UZC4 ZONE DEMAND LIMITING FEATURE STATUS LED s ARE INCLUDED ON ALL MODULES ONE ZONE MODE SETBACK CAPABILITY SIMPLIFIED WIRING AND SYSTEM SETUP FIRE ALARM INTERFACE THERMOSTATIC DEMAND STAGE UP ON ALL ZONES The UZC4 is the first Zone Control System to allow 4 stage thermostats to be connected to all zones The UZC4 is capable of numerous staging sequences depending on the type of HVAC system being controlled the type of thermostats connected and the programmed staging sequence you desire As always you can still control a multi stage HVAC system using inexpensive single stage thermostats and sequence the staging by on board adjustable time delay or by using an optional outdoor air sensor OAS and sequence the staging via an outdoor
38. g hot or cold air into the zone s that were calling for it OAS STAGES TMR Select OAS if you want to delay multi stage operations based on the outside air temperature sensor Select TIMER if you want to delay stage up based on the adjustable on board timer Both features are very useful when using single stage thermostats on all zones NOTE1 Y2 W2 stage up defaults to a 30 minute delay when OAS is chosen NOTE2 An optional Outside Air Sensor Part OAS is required to use the OAS feature NOTE3 Thermostat demands to stage up will always over ride the Timer or OAS staging operations Unless the 50 rule has been enabled or the Return Air temperature limit has been exceeded NOTE4 Thermostatic demands to Stage Down will be honored unless the Timer is also in use NOTES Disable the Timer by setting to OFF and the UZC4 will obey Stage up amp Stage down demands via the thermostats only OFF 50 RULE gt ON Select OFF if you do not want to inhibit two stage compressor cooling operations based on the total number of zones calling Select ON 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 NOTE 1 In All Modes the 50 rule occurs between Y1 and Y2 NOTE2 In Gas mode the 50 rule occurs between W1 amp W2 NOTE3 If Dual Fuel or OAS has been selected the 50 rule applies to cooling only Heating stag
39. gnals even if no wire is connected there TECHNICAL SUPPORT EWC Controls provides superior toll free Troubleshooting Support for the UZC4 when you are on the job site Call 1 800 446 3110 Monday Friday 8am to 5pm East Coast Time Otherwise call 1 732 446 3110 for information on the UZC4 and other ULTRA ZONE products When calling for Technical Support please have a multi meter pocket screwdriver and wire cutter stripper handy 24 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com
40. ing for typical 2 stage Heat 2 stage cool Gas Furnace Diagram reflects DS BK terminal lower speed wired to the Auxiliary output NC Normally Closed terminal Auxiliary Relay Dip Switch 5 NOTE 1 A jumper is Bank 2 should be set to RA Reverse Acting when using the type of control shown required across the R terminal on zone 1 and the AUX R terminal NOTE 2 Other configurations are available Contact Technical Support for further information 28mg S5vot o DIE EE GG zm4do o o r T JUMPER REQUIRED Figure 24 Wiring for typical 2 stage Heat 2 stage cool Thermostat Diagram reflects AUX R terminal wired with a jumper to the R terminal Auxiliary Relay Dip Switch 5 Bank 2 should be set to RA Reverse Acting EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 e 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com 19 SYSTEM WIRING CONTINUED Specialty Applications The Auxiliary Feature can be used to control Humidify Operations on any HVAC System Set the Auxiliary relay Dip Switch to Direct Acting and connect a dry contact Humidity Control to the R and AUX R terminals When the UZC4 detects a demand to Humidity it will energize the Auxiliary Output Relay The Auxiliary relay contacts are dry so you can connect and control most any humidifier you want These drawings show an Ultra Zone 072000 Smart Humidistat connected to the Auxiliary Inpu
41. l amp Commercial buildings Coordinate with the Fire Systems Contractor to interlock the UZC4 into the building Fire Alarm system as shown and cut the Jumper 1 When properly interlocked to the buildings Fire Alarm system the UZC4 becomes an integral part of the Fire Safety System If the Fire Alarm system activates the UZC4 will shutdown the controlled HVAC system and force all connected dampers to the closed positions effectively isolating the duct work and the Fan system This action will reduce the spread of smoke advancing through the building assisted by Fan and Duct systems that are not interlocked with a Fire Alarm system or equipped with the capability to do so The UZC4 has a set of dedicated terminals to power up and control an EBD Electronic Bypass Damper The UZC4 will assume control of the EBD and force it to the OPEN position during the Idle periods Short cycle delays or Changeover delays It will also maintain that open position for 45 seconds at the start of any thermostat demand for Heating Cooling or Fan only operation After 45 seconds the UZC4 will release control of the EBD resulting in a smooth gradual increase in static pressure The 45 second startup delay allows a Constant speed fan to startina Quiet Mode eliminating air noise upon system startup It also eliminates hunting on variable speed systems and it enhances the latent cooling capacity of any HVAC system Using th
42. lt STAGES gt TMR H M r33 R77 c29 TERMINAL M2 E 4 OFF lt 50 R gt ON tim L Rs4 Rae C s BLOCK Ma 2 QRS SPARES Boao HEE Eines oes I v T 3 A E T R79 C30 SN To e A LINK Ej ST UT L fpe ors mC T M6 Z ZRV gB Iren E ase a A M4 S O OFF lt ZDL gt ON cimi R40 Co ca 82 v2 MENS HL Sech rm Ri eL lt RALMT gt 10_ m O R43 R84 M 1 DJ E ANY lt FAN CTRL gt Z1 m1 C R44 R85 c32 IBA 5 cs cs Ree TB12 Rugged M6 IRJ z CH M 77 c Damper M4 S Oo pes T Rugged amp Motor M2 2 ma His C c7 R89 Versatile Terminal Iva SEM N 5 SS Se S Thermostat Blocks Ka E nm Ll R91 csa T Terminal TB5 R92 A Blocks Es M6 e Z BEgERRBEE c16 R93 c35 EON M4 e FR Ee 2 us Raa T C18 M2 Q N 1 R48 1 ef R95 case 3 U1 R96 Outside M1 Q E ow To 2 c20 Se Da 7 L E i TBE R98 Damper M6 ES Oo F4 Rso L 1 ES sw2 Hae C37 TB13 Terminal A Eu c23 Block M4 Q D C el ET H R58 I o Ud S R100 C 101 cas M2 SU M p est LI TT T W1i7E M1 SE n H RESE RESET de i a w2 Electronic TDI a bd T us R104 T O B Bypass M6 gt E m R105 A Y1 Damper M4 SS B u19 u18 u17 R106 T Y2 Terminal M2 SH p moz cao e R Block 7 Mi SS E R108 G gt M L STATUS BEES E Tm i C41 NC Su OAS LIMIT Ea tebe Bx me Multi NO SS x H SAS LIMIT fap LEDS R112 C RS R 5 RAS LIMIT e E Lena vull m Function e ZONE 4 OPEN Ean LEDS HN C Auxilary 8i ZONE 3 OPEN Fan oe mre mu U
43. nd configured for you at the factory The UZC4 connects to these housed expansion assemblies via a flexible 20 long bus cable Each Expansion module has a set of address switches that must be set properly to allow the UZC4 to recognize each expansion module in the correct order Note the STATUS LED provided on every Expansion Module to indicate active micro processor operation There are also two DAMPER LED s provided to indicate which damper s are energized open or closed Next to each Damper and Thermostat terminal block is a blank white square where the Zone Number can be written to easily identify it as a new expanded zone These blocks will be filled in for you at the factory when a UZC 6 zone 8 zone 10 zone or higher has been ordered The ZXM2 address switches will also be factory set for you Note the same multi input thermostat terminals are supplied on the ZXM2 as are supplied on the UZC4 Main Module Most Important of all is to note the MXR amp MXC Damper Motor Power Input Block The ZXM2 Expansion Module is powered via the Bus Cable from the UZC4 but the power for the dampers must be provided by a separate transformer and is isolated from the module This allows great freedom to connect as many dampers as the 2 5 amp thermal breaker can handle See page 19 for damper motor power supply details Make sure to read the ZXM2 Technical Bulletin for the proper cabling scenarios and zone address settings for your system
44. nuine ULTRAZONE Dampers and Competitors typical 24 vac Spring loaded dampers Included in these VA load ratings are the correct number of thermostats the UZC4 Zone System and a 5 field factor Spring loaded dampers draw higher currents amp require more power TESTING DAMPER MOTORS ND URD SMD BMD Dampers Connect 24vac common to terminal 1 and 24vac hot to terminal 4 Damper should Open Remove 24vac hot from terminal 4 and apply to terminal 6 Damper should Close RDN SMDL BMDL Dampers Connect 24vac common to terminal 1 and 24vac hot to terminals 2 and 4 Damper should Open Remove 24vac hot from terminal 4 Damper should Close SR ESR Power Close Spring Open Dampers Connect 24vac common amp hot to the two motor M terminals Damper should Close Remove 24 vac hot Damper should Open SR ESR Power Open Spring Close Dampers Connect 24vac common amp hot to the two motor M terminals Damper should Open Remove 24vac hot Damper should Close 20 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com Fire Alarm Interlock Terminals and Cuttable UZC4 FEATURES AT A GLANCE Rugged 10 pin Expansion Header Protective header cap not shown for clarity J1 y User Friendly Adjustable Multi function Potentiometers ULTRA ZONE
45. or refer to the chart on the right Anc C19 C20 Bright STATUS LED and DAMPER LED S with ZONE ID blocks All Expansion module Dip switch banks must be set correctly for proper zone address identification The 1st expansion module would be zones 5 amp 6 The 2nd expansion module would be zones 7 amp 8 The 3rd expansion module would be zones 9 amp 10 And so on up the line for a total of 20 zones The switches are set for you at the factory unless you are expanding the system in the field It is a good idea to check them anyway Expansion Panel No D ER Rugged amp Versatile Thermostat Terminal ZONE ID Blocks Dip Switch Settings slo nuu N cV 0 rage a ve zi 1 902 n ve oss mu N KCL Kai D v IE a CH ie J c t a zo 2UD ojo NI S mo r D 902 S12 D Buy KCL d y 902 SLO oj jo N KCL a y LO CH 902 S uu K t D EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com 23 TROUBLESHOOTING SYMPTOM LED S are responding properly but HVAC system is malfunctioning SOLUTIONS Check HVAC system wiring for proper connections Check HVAC system wiring for shorts miswiring Check HVAC System Check HVAC System techni
46. p Operations depend upon the correct setting of this switch O RV B Choose the type of Reversing Valve you want to control Select O if your heat pump reversing valve energizes in cooling and defaults to heat mode Select B if your reversing valve energizes in heating and defaults to cool mode NOTE The UZC4 will hold the O output or the B output continuously even during idle periods until a thermostatic demand to change modes is detected NOTE Proper setting of this switch is critical The reversing valve will not function properly if this switch is not set correctly OFF lt ZDL gt ON Select ON and the UZC4 will limit HVAC 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 UZC4 will not activate the HVAC system This feature only activates at 8 or more zones Select OFF if you do not want to utilize the Zone Demand Limiter feature NOTE Zone 1 is not affected by this feature Zone 1 demands are always honored ZDL example A zone system has 20 total zones and the ZDL feature is active At least 4 zones must be calling for the same mode of operation Heat or Cool or the UZC4 will not activate the HVAC system 18zone 3 16zone 3 14zone 3 12zone 2 10zone 2 8zone 2 RA lt AUX RLY gt DA Select the control signal type you need in order to activate your preferred Auxilary Relay function Choose R
47. r above Stage Downis forced Default 10 set points Ifthe Return Air temperature is 90 degree F or below Stage Up is allowed 115 degree F or above Stage Down is forced RETURN AIR LIMITS DURING HEATING CYCLES FOR GAS OIL STRAIGHT ELECTRIC Default 0 set points If the Return Air temperature is 80 degree F or below Stage Up is allowed 115 degree F or above Stage Down is forced Default 10 set points If the Return Air temperature is 90 degree F or below Stage Up is allowed 125 degree F or above Stage Down is forced RETURN AIR LIMITS DURING COOLING CYCLES FORALL HVAC SYSTEM TYPES Default 0 set points If the Return Air temperature is 65 degree F or above Stage Up is allowed 55 degree F or below Stage Down is forced Default 10 applies to heating operations only The Return Air Sensing Feature cannot cycle the 1st stage equipment off line It can only force a Stage Down when the equipmentis in 2nd stage cool or 2nd 3rd or 4th stage heat and the selected return air set points above have been exceeded The Supply Air Sensing feature is the only monitor that can cycle the 1st stage equipment off line Athree minute delay will occur after a forced stage down If a stage up demand is present the UZC4 will allow the stage up to re occur when the three minute delay has expired and the return air temperature is back to normal The UZC4 will automatically adapt to the GAS OIL ELECTRIC se
48. r periods AUX RELAY The AUX RELAY LED will illuminate solid to indicate that the Auxilary relay is being energized in response to a demand to start a function such as Humidify or De humidify FAN The FAN LED will illuminate solid to indicate a demand for fan operation during COOLING HEATING PURGE or CONTINUOUS FAN operations COMPRESSOR 2 The COMPRESSOR 2 LED illuminates solid to indicate the 2nd stage compressor is energized COMPRESSOR 1 The COMPRESSOR 1 LED illuminates solid to indicate the 1st stage compressor is energized REV VALVE O The REV VALVE O LED will illuminate solid to indicate that the reversing valve on a heat pump system is being energized to the COOL position The LED will be out during heating mode on a heat pump W1 HEAT The W1 LED illuminates solid to indicate 1st stage of HEATING is energized in a conventional HVAC system Or the W1 LED illuminates solid to indicate the 1st stage of Auxiliary or Backup heat is energized in a heat pump system 3rd stage heat Also illuminates during Emergency mode W2HEAT The W2 LED illuminates solid to indicate 2nd stage of HEATING is energized in a conventional HVAC system Or the W2 LED illuminates solid to indicate the 2nd stage of Auxiliary or Backup heat is energized in a heat pump system 4th stage heat Also illuminates during Emergency mode EMERGENCY The EMERGENCY LED illuminates solid to indicate all stages of Auxiliary Backup and Standby Heat ave been energized
49. rate a UZC4 system must be supplied by a separate transformer WARNING DO NOT use the 24 vac power supply from the HVAC manufacturer s equipment NOTE Unlike previous UZC series zone control systems the UZC4 supplies power to all connected expansion modules This improved design simplifies the installation wiring and reduces the possibility of polarity reversal or incorrect transformer phasing The UZCA does allow you to isolate and power up the damper terminal block separately for greater versatility POWER WIRING Line A single 24vac 40va Voltage Ea UL Listed transformer PROVIDE MEANS OF f Bob can power the UZC4 DpiscoNNECT Main module with one FA Ol damper on each zone FA S A total of four zones AN 0 IR and four dampers See zw lc l page 19 for more load L and transformer data TRANSFORMER TM l 24vac 40 100va UL LISTED po Figure 2 UZC4 Power wiring Supply TYPICAL 1 HEAT 1 COOL THERMOSTAT WIRING MODEL EWT 3707 zk Common wire not required if batteries are used Figure 3 Model EWT 3707 Configured for 1 heat 1 cool SS1 mode Typical Gas Oil or Hydronic System ze Common wire not required if batteries are used Figure 4 Model EWT 3707 Configured for typical 2 stage Gas or Electric heating system with 1 stage cooling CONVENTIONAL 2 HEAT 2 COOL THERMOS
50. rovide the isolation for you See the diagram below for typical wiring solutions for dampers Typical damper power wiring for a ZXM2 Expansion Module A single damper on the first expansion zone and three dampers on the next Your L2 actual number of dampers per zone may vary Y Y To Line Voltage Provide over current L1 protection Separate 24 vac Transformer 60va MAX THERMAL CIRCUIT gt BREAKER gel eile Elek 72 cele o Q Eu o 26 E S D DL S a D l ZS S zl mei oi Ca SS KE ol LO 25 RE SS EI o S o oR mi D 9 Q a SS DO QN Elo Su o as S 99 E EE o c YS S ES ai L Ou ES S EI Po 7 D ob D o GE 9 E I o O z S S S Ki Ka S o 3 S bd D CN e g pu kl 7 E D S E 2 oO Ki E bd D Q D gt D S bd a z 9 S 3 S D OI Figure 36 UZC4 Recommended Power Solutions ND URD s l 3 5 5va Number of Dampers Directly Connected to Main Module Spring Types Number of Dampers Directly Connected to Main Module per damper GEI VE 8 10 va AST AD SL Use class 2 UL 2 3 e Listed 1585 N a inherently N 2 current limiting 9 z transformers 3 3 only 5 z Non inherently current limiting transformers must have field provided over current protection on the secondary 24 vac output The table values provided pertain to ge
51. t and an S2000 S2020 Steam Humidifier connected to the Auxiliary Output Refer to the Technical Bulletins on the Ultra Zone S2000 S2020 and the 072000 Smart Humidistat for additional details The UZC4 humidity control logic allows a Humidity demand to occur at any time There is no need for a Heating demand to occur first Bear this in mind when field wiring your system You may have to interlock your Humidifier to run during a heating call only Steam Humidifiers can run at any time and do not require a heating demand to occur first NOTE Humidify operations can only be achieved in DA Direct acting mode 16 Using the UZC4 s Auxiliary Feature to control Humidify Operations 2000 S2020 STEAM HUMIDIFIER 1 or 2 STAGE CONDENSING ezmHuAoxo o c r R WIRE MAY NOT BE REQUIRED ON YOUR CONDENSING UNIT 28m 3vcvot o QIP S S ooo Variable or Constant Speed FURNACE with 1 or 2 stage HEAT and 1 or 2 stage COOL n ra z a Figure 25 Wiring for typical 2 stage Heat 2 stage cool conventional HVAC System Diagram reflects Humidification terminal wired to the Auxiliary output NO Normally Open terminal Auxiliary Relay Dip Switch 5 Bank 2 should be set to Direct Acting DA ULTRA ZONE 2 Heat 2 Cool CONFIGURATION To OAS Ultra Zone 072000 HUMIDISTAT Wiring for typical 2 stage Heat 2 stage cool Conventional H
52. t points when a Heat Pump system stages up to Fuel or Auxiliary mode This powerful feature will enhance the efficiency of your Zoned HVAC system and protect the equipment from excessive bypass temperatures during low load conditions 4 EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com UZC4 ADVANCED FIRMWARE AND HARDWARE FEATURES CONTINUED MODULE TO MODULE FACTORY POWER WIRING RAPID DE HUMIDIFY FIRMWARE The UZC4 includes Factory Power Wiring on all expanded systems The 24 vac power to the expansion modules is fed through the bus cable The bus cable feeds power to all module processors amp thermostats Damper Motor terminal blocks are isolated and powered separately This simplifies your wiring reduces the chances of polarity reversal and allows more connected dampers per zone DIRECT DUAL FUEL COMPATIBLE FIRMWARE The UZCA is fully compatible with Dual Fuel Heat Pumps and other Hybrid HVAC systems Dual Fuel kits are not required Select staging based on Adjustable Time Delay an Optional Outside Air temperature Sensor or allow the thermostats to control staging The intelligent firmware does the rest 7 TO 42 MINUTE STAGE UP TIME DELAY SETTINGS 7 TO 42 DEGREE F OUTSIDE AIR CHANGEOVER MULTI STAGE HEAT ADJUSTABLE LIMIT CONTROL ELECTRONIC BYPASS DAMPER SUPPORT AUXILARY MULTI FUNCTION SUPPORT RELAY The UZC4 will p
53. the breaker Shut off System LEDs on pea ER E power to the panel Find and repair illuminate to indicate system status the short Restore the 24VAC power HVAC system mode and active inactive P zone identification See page 22 for details Operating TEMPERATURE 20 to 160 F 29 to 71 C Damper LEDs Damper 1 thru Damper 20 green LEDs Conditions HUMIDITY 0 95 RH Non Condensing will indicate which zone dampers are demanded to energize Open or Closed Operating INPUT VOLTAGE 19 30VAC 60 Hz indoor Fan The DEGA allows constant ope retion at Control the Indoor Fan by Thermostat 1 only or Power SE 40 100VA MAX NEC Class by each individual thermostat When CURRENT DRAW Max 22VA 24VAC controlled by thermostat 1 All Zone NIS Q 24 dampers will respond When controlled OVER CURRENT PROTECTION 4 0 individually Zones not calling for TB 221 amp or 100VA continuous fan will close EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 e 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com 1 P N 090375A0221 Revision J 12 23 10 Copyright 2004 EWC Controls Inc All Rights Reserved UZC4 STANDARD FIRMWARE AND HARDWARE FEATURES Cooling and Heating Limit Controls The operational sequence of the limit controls depends upon the dip switch settings chosen on the UZC4 main module Multistage Heat Pump sequence will differ from Conventional Gas Electric Indoor Fan Control During Heating Built In Timer Settings
54. will honor any thermostat demand to activate continuous fan and only the dampers connected to that zone will open All others will close Choose Z1 and the UZC4 will honor a demand to activate continuous fan from zone 1 only All connected dampers on all zones will open Demands to activate continuous fan from any other thermostat will be ignored NOTE Continuous Fan Operations will only occur when there are no active or pending heat or cool operations EWC Controls Inc e 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732 446 5362 e E Mail info ewccontrols com INSTALLATION INSTRUCTIONS and THERMOSTAT WIRING CONVENTIONAL 2 HEAT 1 COOL THERMOSTAT MODEL EWT 3707 B Lc wal wa o Y1 R e LE JL Installation should be performed by qualified personnel only Follow local amp national electrical amp mechanical codes Use multi conductor 18 awg solid copper conductors Wire number to number or letter to letter on each control or device WARNING THESE PANELS ARE DESIGNED FOR USE WITH 24 30vac DO NOT USE OTHER VOLTAGES USE CAUTION TO AVOID ELECTRIC SHOCK OR EQUIPMENT DAMAGE Mount the panel housing in a convenient location close to the Air Handler Mounting hardware is provided Use the knockouts provided on the panel housing as entryways into the housing Strain relief fittings can be used if desired Use care and do not damage the circuit board when making wire connections NOTE The 24 vac power required to ope
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