Lennox International Inc. 21 User's Manual
Contents
1. EDA COIL E EDA COIL E 3 WAY DIVERTING VALVE ASSEMBLY 3 WAY DIVERTING VALVE ASSEMBLY EDA COIL E F 3 WAY DIVERTING VALVE ASSEMBLY A Liquid Line From Outdoor Unit B Liquid Line to Indoor TXV C Check Flow Restrictor to Vapor Line Tee D To Charge Compensator side connection 1 4 line must be brazed closed on systems that do not require the installation of a charge compensator E EDA inactive mode bypasses the EDA EDA active mode allows refrigerant flow through EDA F EDA inactive mode vent path to suction line EDA active mode directs refrigerant flow back to liquid line Figure 3 Page 4 EDA 01 06 General Installation Information 4 WARNING Improper installation adjustment alteration ser vice or maintenance can cause personal injury loss of life or damage to property Installation and service must be performed by a qualified installer or service agency The EDA unit may be used in upflow or horizontal dis charge installations Slots around the inlet end of the EDA cabinet are provided to secure the EDA unit to the duct flanges of indoor coil air handler cabinets Use field pro vided 8 x 1 long SDST screw usually 6 required 4 CAUTION Physical contact with metal edges and corners while applying excessive force or rapid motion can result in personal injury Be aware of2. BLACK YELLOW BLUE I BROWN NOT REQUIRED FOR APPLICATIONS WITHOUT LSOM Y1 Y2 JUMPER IN FOR BLUE NOT REQUIRED FOR SINGLE STAGE SINGLE STAGE COOLING REMOVED FOR 2 STAGE COOLING Control Wiring Figure 13 Page 15 EDA INSTALLATION SERVICE INSTRUCTIONS Zoning application Humiditrol Enhanced Dehumidification Accessory EDA Obtain R 410A amp EDA training Desired equipment matchup listed in EDA Engineering Handbook Decision Tree Must use one of these outdoor units XC21 XP19 XC13 XP13 ONLY Must use one of these variable speed indoor units CBX32MV CBWMV G60UHV G60DFV If furnace Select indoor coil MUST BE TXV ONLY G61MPV ONLY Select EDA REFER TO EDA ENGINEERING HANDBOOK X PREFERRED MATCH UP A ALLOWED FOR PHYSICAL MATCH UP TO EVAPORATOR Not Approved HUMIDITROL EDA DO NOT CAPACITY 036C INSTALL 94M42 018 024 030 036 042 NOTE Lennox warranties do 048 not cover damage or defect 060 resulting from operation with system components indoor unit outdoor unit and refrigerant Application Select Piping Kit control devices which do not REFER TO EDA ENGINEERING HANDBOOK AND ich i ificati INSULATION amp PIPING KIT INSTRUCTIONS 505 021M match or meet the specifications CAPACITY OUTDOOR UNIT MODEL PIPING KIT recommended by Len
3. INDOOR COIL CHECK EXPANSION VALVE LIQUID LINE VALVE OUTDOOR UNIT NOTE 1 In Cooling Mode no air temperature change across EDA coils INDOOR UNIT NOTE 2 In Cooling Mode no liquid line temperature change across EDA coils NOTE 3 Charge compensator and 1 4 line not required on all systems See Engineering Handbook Figure 10 Heatina Mode Heat P Applicati In heat pump application heating mode a system that in g Hean EUME ARRIEN cludes an EDA unit will operate as a conventional heat Figure 11 illustrates refrigerant flow in the heating mode pump The EDA unit does not operate in this mode Heat Pump Heating Cycle with EDA Coil Inactive Model EDA 036C shown VAPOR LINE VALVE 7 8 x 7 8 x _ CHARGE COMPENSATOR 3 8 TEE See note 3 See note 1 Q See note 1 CHECK FLOW RESTRICTOR flow restricted See note 2 See note 2 INDOOR BLOWER INDOOR COIL CHECK LIQUID LINE EXPANSION VALVE VALVE INDOOR UNIT NOTE 1 In Heating Mode no air temperature change across EDA coils NOTE 2 In Heating Mode no liquid line temperature change across EDA coils NOTE 3 Charge compensator and 1 4 line not
4. 13 Repair Parts List _ 13 Wiring Diagrams 13 Decision Tree 16 General Information NOTE These instructions are intended as a general guide and do not supersede local codes in any way Consult au thorities having jurisdiction before installation The Humiditrol EDA unit will operate to dehumidify as re quired when ambient temperatures are below 95 F When temperatures reach 95 F the cooling and dehumidification requirements will both be satisfied by the increased sys tem runtime In applications that include a Humiditrol EDA unit a call to activate the dehumidification mode at or above 95 F is unnecessary and would not be issued or al lowed by the SignatureStat room thermostat Prior to system checkout consider the outdoor ambient temperature REMEMBER the EDA unit does NOT function in temperatures at or above 95 F Plan testing to be conducted when temperatures are between 65 F and 95 F to ensure proper EDA set up and checkout operation A IMPORTANT The approved application for the EDA Series unit is restricted to those listed in the Engineering Hand book and price book 505 021M III 4 WARNING This cased product contains fiberglass wool Dis turbing the insulation during installation mainte nance or repair will expose you to fiberglass wool dust Breathing this may cause lung cancer Fibe
5. 7 CHARGE COMPENSATOR holding some refrigerant See note 3 3 WAY DIVERTING VALVE See note 1 INDOOR COIL See note 2 INDOOR BLOWER CHECK EXPANSION T INDOOR UNIT NOTE 1 With EDA Coil Active expect a 10 to 25 F air temperature rise across EDA coils NOTE 2 With EDA Coil Active expect a 10 to 40 F liquid line temperature change across EDA coils NOTE 3 Charge compensator and 1 4 line not required on all systems See Engineering Handbook Figure 9 EDA 01 06 Page 10 Cooling Mode Dehumidification OFF The liquid refrigerant from the outdoor unit enters the EDA Cooling Mode Dehumidification OFF module Since there is no demand for dehumidification Figure 10 illustrates refrigerant flow in cooling mode dehu the 3 way diverting valve assembly directs the flow back midification mode OFF out of the EDA module to the indoor unit expansion valve Cooling Cycle with EDA Coil Inactive Model EDA 036C shown VAPOR LINE VALVE 7 8 x 718 x T CHARGE COMPENSATOR 3 8 TEE NOT holding refrigerant See note 3 7 E 3 WAY 1 DIVERTING VALVE See note 1 Q See note 1 CHECK FLOW RESTRICTOR flow restricted See note 2 See note 2 INDOOR BLOWER
6. 600 285 0 05 12 Table 3 800 380 0 08 20 Control Wiring Requirements 1200 565 0 15 37 Signe Indoor unit to 1400 660 0 20 50 er Signatu Signatu EDA 060DB 1000 470 0 05 12 Sensor restat restati 1200 565 0 06 15 9 8 1400 660 0 08 20 g 7 1600 755 0 10 25 twisted 1800 850 0 11 27 P 2000 945 0 13 32 8 2200 1040 0 15 37 Includes conductor for 2 stage heat Page 13 EDA INSTALLATION SERVICE INSTRUCTIONS Typical EDA Condensing Unit Wiring Diagram OUTDOOR RELAY NOT REQUIRED WITH SINGLE SPEED OUTDOOR FAN VALVE ACTUATOR 1st cut yellow wire here 2nd rewire yellow wire as shown Use Wirenuts 1 OHO KI I COMPRESSOR CONTACTOR rig O YLW FAN D SEE CONTROL WIRING BELOW FOR THERMOSTAT WIRING DS Y1 JUMPER MUST BE REMOVED FOR HUMIDITROL OPERATION COMPRESSOR Y1 Y2 JUMPER ONLY REMOVE IF 2 STAGE COOLING 208 230 60 1 OUTDOOR WIRING VSM APPLICATION ONLY COMPRESSOR CONTACTOR OUTDOOR UNIT RED NOT REQUIRED FOR INDOOR UNIT PURPLE APPLICATIONS WITHOUT LSOM BLACK OUTDOOR FAN FAN RELAY NOT REQUIRED WITH SINGLE SPEED RED BLACK PURPLE 5 SignatureSat THERMOSTAT OUTDOOR SENSOR 46M98 TWISTED PAIR Re Aa Z YELLOW BLUE NOT REQUIRED FOR SINGLE STAGE 0000000 BLACK BROWN NOT REQUIRED FOR EDA 01 0
7. FITTING TORQUE CHATLEFF CONNECTION TO 20 FT LBS Indoor TXV Liquid Line From Outdoor Unit Liquid Line from Outdoor Unit Liquid Line to Indoor TXV MUST BE INSULATED ELECTRICAL TO CHARGE COMPENSATOR SIDE CONNECTION CHECK FLOW RESTRICTOR TO VAPOR LINE TEE LIQUID LINE TO INDOOR TXV 2 ft max Compensator Details USE REDUCER S FROM CHARGE COMPENSATOR KIT WHEN REQUIRED DROP TO CHARGE COMPENSATOR VAPOR LINE FROM 7 8 X 7 18 X 3 8 TEE OUTDOOR LIQUID LINE FROM OUTDOOR UNIT 6 ft max BETWEEN CHARGE COMPENSATOR AND EDA USING 1 4 LINE PROVIDED IN CHARGE COMPENSATOR KIT TO CHECK FLOW RESTRICTOR ON EDA CHARGE COMPENSATOR VAPOR LINE INDOOR COIL 1 4 TUBING CONNECTION MUST BE AT LOWEST POINT OF THE COMPENSATOR TYPICAL HORIZONTAL POSITION INSTALLATION Figure 5 Page 7 MUST BE INSULATED System without compensator 1 4 PORT MUST BE BRAZED CLOSED NO CHARGE COMPENSATOR OR 1 4 LINE VAPOR LINE FROM INDOOR COIL USE REDUCER S FROM CHARGE COMPENSATOR KIT WHEN REQUIRED CHARGE 1 4 TUBING CONNECTION MUST BE ON BOTTOM OF COMPENSATOR USE REDUCER S FROM CHARGE COMPENSATOR KIT TO CHECK FLOW WHEN REQUIRED RESTRICTOR ON EDA b VAPOR LINE FROM 7 8 X 7 8 X OUTDOOR UNIT 3 8 TEE UPFLOW POSITION EDA INSTALLATION SERVICE INSTRUCTIONS Leak Testing Evacuating Chargin
8. TO IS DE ACTIVATED MAKE ALL REFRIGERATION COOLING POSITION AS CHECK FOR CONNECTIONS BEING SURE SHOWN IN FIGURE 7 TO INSTALL THE CHECK FLOW OUTDOOR N NO CORRECT RESTRICTOR SEE FIGURE 5 TEMPERATURE gt gt OPERATION AL A BELOW ENABLE HUMIDITROL ON 95 F AMBIENT ROOM THERMOSTAT SEE 2 TEMPERATURE IS LEAK CHECK THE SYSTEM FIGURE 8 BELOW 95 F WITH 3 WAY VALVE ASSEMBLY SET TO EVACUATE SEE FIGURE 7 OUTDOOR UNIT SET THERMOSTAT FOR COMPRESSOR IN HIGH STAGE MAXIMUM COOLING FAN IN LOWEST SPEED EDA INSULATE ALL REFRIGERANT 3 WAY VALVE ASSEMBLY TO DEHUMIDIFICATION LINES POSITION OPEN REFRIGERANT VALVES INDOOR UNIT FAN IN DEHUMIDIFICATION SPEED EVACUATE THE SYSTEM AS DESCRIBED IN THE OUTDOOR TURN OUTDOOR UNIT MAIN UNIT INSTALLATION POWER ON CHECK THE TEMPERATURE DIFFERENCE INSTRUCTIONS ACROSS THE EDA COIL AND THE LIQUID LINE TEMPERATURES AS NOTED IN FIGURE 9 ON CHECK CHARGE AND CHARGE PAGE 10 INSTALL OUTDOOR SENSOR AS NEEDED SEE PAGE 8 Figure 4 Page 6 EDA 01 06 Electrical Inlet K To Charge Compensator side TT 7 connection some applications Check Flow Restrictor to Vapor Line Tee Liquid Line to Typical Installation Horizontal Air Handler shown EDA UNIT o Check Flow Restrictor Details TEFLON SEAL CHECK FLOW RESTRICTOR p d AND O RING FITTING IN EDA UNIT IMPORTANT RESTRICTOR MUST BE INSERTED WITH O RING END OF RESTRICTOR TOWARD EDA UNIT
9. and use caution when working nearby these areas during installation or while servicing this equipment Refrigeration All EDA coils are shipped with a combination check flow restrictor The restrictor is provided in the bag assem bly and must be installed Refer to the appropriate high and or low side installation instructions for information on the appropriate line sets Refer to Lennox Refrigerant Pip ing guide Corp 9351 L9 for proper size type and ap plication of field fabricated lines Page 5 Releasing Air Charge NOTE EDA units use dry air as a holding charge 4 CAUTION The EDA coil is shipped from the factory pressur ized with dry air Pierce a hole in the coil s rubber plug vapor line seal to relieve the pressure before re moving the seals Ensure that the coil is void of pressure Remove the rubber plug from the lines NOTE If there is no pressure when the plugs are pierced check the unit for leaks before continuing with the installa tion Refrigerant Line Connections NOTE When connecting lines be careful to avoid damag ing the 3 way diverting valve access panel Place a wet rag against the piping plate and around the EDA unit line con nections A wet rag heat shield must be in place during brazing to guard against damage to the paint Electrical Wiring Electrical wiring diagrams are provided in figures 12 and 13 see pages 14 and 15 Some modifications to certain units may be necess
10. 6 APPLICATIONS WITHOUT LSOM Control Wiring Figure 12 Page 14 Y1 Y2 JUMPER IN FOR SINGLE STAGE COOLING REMOVED FOR 2 STAGE COOLING Typical EDA Heat Pump Wiring Diagram R OUTDOOR RELAY VALVE NOT REQUIRED WITH SINGLE ACTUATOR SPEED OUTDOOR FAN 2nd rewire yellow wire as shown 1st cut yellow wire here PURPLE Use Wirenuts LI COMPRESSOR CONTACTOR S40 CRANKCASE THERMOSTAT HRI CRANKCASE HEATER OUTDOOR WIRING VSM APPLICATION ONLY gt B INDOOR UNIT o wo S eee o o c zi O 0 e DS Y1 JUMPER MUST BE REMOVED FOR HUMIDITROL OPERATION COMPRESSOR D lt N o c a SEE CONTROL WIRING BELOW FOR THERMOSTAT WONNECTIONS Al32 OgO A EQUIPMENT GROUND 1 R O JUMPER MUST BE REMOVED FOR HEAT PUMP APPLICATION Q x CAPACITOR o BT s O 1 D e COMPRESSOR Y1 Y2 JUMPER ONLY CONTACTOR e REMOVE IF 2 STAGE COOLING Y LU RED O OUTDOOR SignatureSat UNIT THERMOSTAT RED OUTDOOR RED SENSOR FAN RELAY NOT REQUIRED WITH SINGLE SPEED BLACK 46M98 OUTDOOR FAN TWISTED PAIR PURPLE PURPLE
11. 70 priority Two stage outdoor unit Y2 2 ON ON ON ON Demand High 100 Dehumidification Mode Only No Cooling Demand Single stage outdoor unit 1 ON na ON ON A Humiditrol EDA equipped system is allowed to operate and cool room temperature below set point but only by 2 F when try Demand High 50 70 Two stage outdoor unit Y2 ing to satisfy a persisting humidity set point it is not allowed to operate at all when outdoor temperature is gt 95 F Demand NOTE Blower CFM speed percentage will vary depending on selected indoor equipment furnace coil blower etc EDA 01 06 Page 12 Repair Parts 3 way diverting valve assembly Check flow restrictor EDA Relay Outdoor unit relay e Teflon seals Table 2 shows air volume and total air resistance for the available EDA models Table 2 Air Resistance Typical condensing unit and heat pump wiring diagrams Air Volume Total Air Resistance are provided in figures 12 and 13 Some modifications to Model No cfm Lis in w g Pa certain units may be necessary EDA 024B 400 190 0 05 12 Connect the EDA unit with the indoor and outdoor units 600 285 040 25 opinas o cla yu A here 800 380 0 15 37 stat s outdoor sensor terminal block Table 3 shows the re 1000 470 0 22 55 quirements for control wiring EDA 036C
12. ATE CENTER DEHUMIDIFICATION REARWARD Figure 7 5 The charge must be checked with the system in cool ing operation dehumidification OFF After testing and charging as required set the thermostat to force a demand for dehumidification Page 8 Insulating and Sealing the Unit A IMPORTANT All piping metering devices and connections must be insulated to prevent moisture damage caused by sweating Seal the unit so that warm air is not allowed into the cabi net This is especially important when the unit is installed in an unconditioned area Make sure the liquid line entry points are sealed with either refrigerant tube insulating ma terial or with Permagum see figure 5 on page 7 Other System Components Blower Control EDA units are to be applied with an indoor unit that has a variable speed motor VSM Refer to the indoor unit instal lation instruction for setting blower speed Thermostat and Sensor A IMPORTANT A SignatureStat thermostat and properly connected outdoor sensor is REQUIRED for the EDA unit to function properly Twisted pair wire 84X49 or equivalent is REQUIRED between the SignatureStat and the outdoor sensor Install the remote sensor on the outside of a northern wall of the home away from direct sunlight or other heat sources that may affect its sensitivity Refer to the SignatureStat thermostat Installation Instructions for installation wiring and setup
13. Also refer to the SignatureStat Thermostat Programming Guide for programming and settings To configure the thermostat for operation with a Humidi trol system first enable HUMIDITROL in the thermostat s installer settings follow the path MENU INSTALLER SETTINGS HUMIDITROL see figure 8 A and B Page 9 Then select HUMIDITROL mode from the DEHUMIDIFY menu follow the path MENU gt DEHUMIDIFY The user control sequence is also shown in figure 8 C through H specifically e Turn on Humiditrol D amp E e Set level of dehumidification F through H adjustment range is from 45 to 60 and is factory set to 50 If HUMIDITROL is enabled and the outdoor sensor is dis connected operation is NOT allowed in dehumidification mode This is indicated by the display of OUTSIDE ERR on the SignatureStat thermostat Home screen Setting Thermostat Installer Setup INSTALLER SETTINGS AUTO CHANGEOVER EER DISABLE DEADBAND ENABLE HUMIDITROL MAIN MENU INSTALL MENU SELECT HUMIDITROL SELECT A MAIN MENU DEHUMIDIFY MENU PROGRAM MODE OFF HEAT COOL DEHUMIDIFY 50 HUMIDIFY DEHUMIDIF HOME MAIN MENU SELECT DEHUMIDIFY MODE DEHUMIDIFY MENU OFF MODE HUMIDITROL HUMIDITRO DEHUMIDIF 50 DEHUM MENU SELECT MAIN MENU SELECT DEHUMIDIFY MENU HUMIDITROL DEHUMIDIF 55 DEHUMIDIFY CONTROL MODE 50 DEHUM MENU SELECT MAIN MENU SELECT Figure 8 EDA INSTALLATION SERVI
14. CE INSTRUCTIONS EDA Unit Operation The EDA coil is added to an HVAC system downstream of the indoor coil In dehumidification mode the coil becomes an extension of the condenser coil and injects heat into the indoor air stream This dehumidification mode allows significantly improved control of the humidity in the conditioned space without overcooling the space The assembly includes a set of 3 way diverting valves which will either route refrigerant through the EDA coil or cause the refrigerant to bypass the EDA coil depending on the mode of operation Operation Notes 1 IMPORTANT REMINDER Dehumidification will not occur when the outside temperature is at or above 95 F 2 When operating in cooling or heat pump heating mode all temperatures and pressures will be as ina normal system 3 When the thermostat is in HUMIDITROL mode and after a cooling demand has been satisfied but a dehu midification demand persists and the room tempera ture is not more than 2 F below the setpoint the air handlers will operate at reduced airflow with the com pressor at high speed 4 When the unit is in the dehumidification OF mode the display will show a raindrop 15 icon with an imbedded negative sign and the current relative humidity to its right 54 RH Cooling Mode Dehumidification ON If the room thermostat s cooling demand has been satis fied but the dehumidification setting has not been satisfied the unit continue
15. LENNOX 2006 Lennox Industries Inc Dallas Texas USA Humiditrol EDA Series Unit The Dave Lennox Signature Collection Humiditrol En hanced Dehumidification Accessory EDA is designed for installation with a Lennox R 410A split system outdoor unit and an air handler or a furnace with a variable speed blow er This accessory is designed for indoor installations in ei ther upflow or horizontal air discharge applications This unit is for use only on R 410A systems with thermal expansion valves Prior to installation study the decision tree on page 16 to confirm that all application requirements for EDA installation are met NOTE For downflow application refer to Installation In struction Supplement Installing EDA Unit in Downflow Configuration 505 134M Shipping amp Packing List 1 Assembled EDA indoor unit 1 Bag assembly includes check flow restrictor for use on EDA coil EDA notification label 1 Outdoor fan relay and wiring harness used only with outdoor units equipped with variable speed fan motors Check the components for shipping damage If any dam age is found immediately contact the last carrier Other Required Components Separately ordered components are restricted to those listed in the Engineering Handbook and the price book SignatureStat thermostat Outdoor Sensor 46M98 included Single stage 81M26 Multi stage 81M27 Multi stage heat pump 81M28 Twis
16. XV Liquid Line From Outdoor Unit 241 2 12 64 INLET AIR OPENING 20 1 8 511 11 16 17 1 7 16 37 11 16 17 Page 2 EDA 01 06 Installation Dimensions and Arrangement EDA 024B 12 1 2 EDA 036C 12 1 2 EDA 060D 14 TRANSITION See Note 2 Varies by indoor coil model see LENNOX Engineering Handbook Varies by air handler model see LENNOX Engineering Handbook for TYPICAL dimensions UP FLOW ds POSITION Furnace Shown AIR FLOW UP FLOW AIR HANDLER UP FLOW FURNACE NOTES 1 Transition is required for all air handlers dimension width and depth is dependent upon the air handler and the EDA model used 2 Transition is required between indoor coil and EDA if 5 ton EDA unit is used with small profile furnace Figure 1 Page 3 EDA INSTALLATION SERVICE INSTRUCTIONS Component Functions Charge Compensator The charge compensator shown in figure 5 serves to maintain the proper amount of refrigerant circulating in larger systems Some systems do not require a charge compensator but do require a simi lar kit to connect into the system see Engineering Hand book The charge compensator stores excess refrigerant when the EDA coil is active and returns it to the system during normal cooling or heating operations When the EDA coil is active less charge is required to obtain the proper amount of subcooling because of the additional coi
17. ary Review the diagrams before installa tion to ensure all necessary components are on hand at time of installation EDA Installation and Checkout Flow Chart Follow the procedures in the flow chart in figure 4 while re ferring to the illustration in figure 5 to install the EDA and associated components EDA INSTALLATION SERVICE INSTRUCTIONS EDA Installation amp Checkout Flow Chart Required Parts all applications EDA Unit with check flow restrictor amp label Appropriate SignatureStat Thermostat 46M98 Outdoor Sensor 84X49 Twisted Pair Wire Appropriate Insulation and Piping Kit PROCURE Required Parts 2 Stage Heat Pump appl MISSING PARTS 12P61 75VA Transformer for HP applications Installation Process Check Dehumidification Operation ENSURE ALL POWER IS OFF MAKE WIRING CONNECTIONS SET COOLING SETPOINT ON ROOM THERMOSTAT AS SHOWN IN FIGURES 12 amp 13 TO 2 DEGREES ABOVE INDOOR TEMPERATURE SEE PAGES 14 AND 15 OUTDOOR UNIT WILL TURN OFF NOTE A Humiditrol EDA equipped system is allowed INSTALL FE IN DUCT to operate and cool room temperature below set point as INSTALL EDA LABEL ON uno 22 a when trying to satisfy a persisting hu OUTDOOR UNIT LOUP INSTALL THE CHARGE SET DEHUMIDIFICATION SETPOINT TO 5 BELOW COMPENSATOR IF REQUIRED IN CONVENIENT LOCATION POWER UP THE INDOOR UNIT CURRENT ROOM RELATIVE HUMIDITY SEE FIGURE 5 CHECK THAT 3 WAY VALVE DEHUMIDIFICATION ASSEMBLY IS SET
18. elay Confirm if unit has variable speed outdoor fan relay is installed properly see wiring diagram figures 12 and 13 Outdoor Unit EDA Label Confirm label is installed in prominent location and will be easily visible during servicing NOTE System will NOT operate in dehumidification mode with outdoor temperature at or above 95 F Operational Status Dehumidification Mode Record supply air temperature and confirm temperature that it is higher than in cooling mode Operational Status Dehumidification Mode On units with variable speed outdoor fan check that fan operates at approximately 250 rpm lowest speed Table 1 Demand Signals Humiditrol EDA Enabled Operating Sequence System Demand System Response System Type Thermostat Demand Relative Humidity Blower Step Y1 Y2 O G CFM Cool Com Status D pressor Comments Cooling Operation No call for dehumidification Single stage outdoor unit 1 ON na ON ON Acceptable High 100 Compressor and indoor Two stage outdoor unit Y1 1 ON ON ON blower follow thermostat demand Acceptable Low 70 Two stage outdoor unit Y2 2 ON ON ON ON Acceptable High 100 Demand for Dehumidification and Cooling Single stage outdoor unit 1 ON na ON ON Demand High 100 Cooling operation has Two stage outdoor unit Y1 1 ON ON ON Demand Low
19. g A IMPORTANT The 3 way diverting valve actuator shaft setscrew see figure 7 is factory set and is not to be adjusted 3 way Diverting Valve Operation NOTE During system operation the 3 way valve requires 24 volt power to drive between cooling and dehumidifica tion The 3 way diverting valve is actually two valves connected by a common shaft designed to open one valve while clos ing the other and vice versa For evacuating with power off the diverting valve can be REPOSITIONED using its actuator lever a long setscrew that has been factory set to a precise point on the common shaft Do not loosen un screw the setscrew Should the setscrew become loose carefully follow the note in figure 6 to position and tighten it Re aligning Setscrew NOTE Actuator shaft setscrew is factory set and must not be ad justed If the set screw should become loose use a pliers to grip the shaft where shown 1 and rotate the shaft in direction of the black arrow until the pin stops inset shows pin and stops Press the red button 2 in the direction of the white arrow and move the lever 3 to the forward position and tighten setscrew to 60 in Ibs torque Figure 6 Leak Testing Evacuating Charging 1 Set the 3 way diverting valve actuator shaft to the cen ter evacuate position for leak testing and evacuation see figure 7 IMPORTANT The actuator shaft must be set as described to allow the EDA to evac uate more q
20. l surface and the cooler air which passes over the EDA coil Check Flow Restrictor The check function of the check flow restrictor shown in figure 2 prevents refriger ant from flowing into the inactive components during times when the EDA coil is inactive The flow restrictor controls the rate of return of charge to the system from the charge compensator and the EDA coil when the system changes from EDA coil active to EDA coil inactive Check Flow Restrictor Operation CHECK FLOW CHATLEFF CONNEG L1 GREATER PRESSURE O RING SEALS a GREATER CHECK FLOW PRESSURE RESTRICTOR Figure 2 Valve Assembly The first valve of the diverting valve as sembly figure 3 E directs the flow of refrigerant to either bypass the EDA coil EDA coil is inactive or pass through the EDA coil EDA coil is active The second valve figure 3 F directs the flow of refrigerant back to the liquid line when the first valve E allows flow through the EDA coil When the EDA coil is inactive the second valve F provides a vent path to the suction line draining the EDA coil and charge compensator of liquid refrigerant EDA Unit Parts Arrangement A B C D A EDA 024B P EDA 036C dium SERE OT Se e Sp mi e e2 DN 5S E x X o o oo Q
21. nox This 018 XC13 98M62 unit intended to operate with ox AS ES variable speed air handlers see I XP13 XP19 XC21 94M44 Lennox Engineering Handbook 030 XC13 XP13 98M22 for approved matches 036 XC13 98M22 XP13 XP19 XC21 94M44 042 XC13 98M22 XP13 94M44 048 XC13 98M22 XP13 XP19 XC21 94M44 060 XC13 98M22 XP13 XP19 XC21 94M44 How Upflow horizontal Installed NOTE AIR HANDLER REQUIRES N FIELD FABRICATED TRANSITION iqu Gi BETWEEN BLOWER OUTLET orizon AND EDA COIL Downflow NOTE REQUIRES ADDITIONAL FIELD FABRICATED SUPPORT FRAME amp TRANSITION SEE INSTALLATION SUPPLEMENT 505 134M Downflow INSTALL SYSTEM Figure 14 Page 16 EDA 01 06
22. r glass wool is known to the State of California to cause cancer Fiberglass wool may also cause respiratory skin and eye irritation To reduce exposure to this substance or for further information consult material safety data sheets available from address shown below or contact your supervisor Lennox Industries Inc P O Box 799900 Dallas TX 75379 9900 Unit Dimensions EDA Model Dimensions Inches mm Dimension EDA 024B EDA 036C EDA 060D A 17 1 2 445 21 533 24 1 2 622 12 1 4 311 12 1 4 311 14 356 16 1 8 422 19 5 8 498 23 1 8 587 16 1 8 422 19 5 8 498 23 1 8 587 1 3 8 35 3 1 8 79 4 7 8 124 3 1 8 79 4 7 8 124 6 5 8 168 3 76 3 1 4 83 4 3 4 121 A WARNING Risk of explosion or fire Can cause injury or death Recover all refrigerant to relieve pressure before opening the system A IMPORTANT The Clean Air Act of 1990 bans the intentional vent ing of refrigerant CFC s HFC s and HCFC s as of July 1 1992 Approved methods of recovery recycl ing or reclaiming must be followed Fines and or in carceration may be levied for noncompliance OUTLET AIR OPENING 20 3 4 527 11 16 17 Check Flow Restrictor to Vapor Line Tee To Charge Compensator side connection Electrical Inlet 22 1 4 Dus iat a 565 Liquid Line to Indoor T
23. required on all systems See Engineering Handbook Figure 11 Page 11 EDA INSTALLATION SERVICE INSTRUCTIONS Check List Checkpoint What to Check Action Thermostat and Sensor Wiring Confirm Sensor connected to SignatureStat using twisted pair wire see wiring diagram figure 13 Thermostat Humiditrol Installer Settings Confirm HUMIDITROL is enabled see figure 8 Thermostat Humiditrol User Settings Confirm HUMIDITROL Dehumidify ON is selected see figure 8 Thermostat Humiditrol User Settings Confirm Relative Humidity setting see figure 8 Indoor Unit Variable Speed Blower Settings Confirm Settings for D CFM 60 to 65 of 2nd stage cool see indoor unit installation instructions and table 1 below Insulation Charge Compensator Insulation Liquid Line Confirm insulation is properly installed see charge compensator kit instructions also see figure 5 Insulation Vent Line to Suction Line Charge Compen sator 1 4 Line Confirm 1 4 port oriented downward see charge compensator details figure 5 Check Flow Re strictor 3 8 Line Confirm restrictor installed oriented properly see check flow restric tor details figure 5 System Charge Refrigerant With unit running in cooling mode check and confirm system is properly charged see outdoor unit installation instructions Outdoor Unit Fan R
24. s to run in dehumidification mode The room thermostat sends a signal to the EDA unit s 3 way di verting valve assembly to begin operating in the dehumidi fication mode Figure 9 shows refrigerant flowing from the outdoor unit entering the EDA passing through the first 3 way diverting valve then entering the EDA coil There heat from the warm refrigerant is transferred into the indoor air stream The refrigerant exits the coil through the second 3 way di verting valve and into the indoor coil expansion valve During dehumidification the indoor air blower and outdoor fan if an outdoor relay is used operates at a lower air vo lume The cool dehumidified air leaving the indoor coil is warmed as it passes over the EDA coil Air temperature rise across the EDA coil can be from 10 to 25 F depend ing on the operating ambient and air conditioned space conditions The warm vapor liquid refrigerant mixture entering the EDA unit from the outdoor unit will be subcooled in the EDA unit and enter the expansion valve at a lower than normal temperature Liquid temperatures can be in the 65 to 70 F range with a 10 to 40 F temperature change across the EDA Cooling Cycle with EDA Coil Active Model EDA 036C shown 4 ovd VAPOR 7 8 x 718 x 3 8 TEE p LINE VALVE See note 1 CHECK FLOW RESTRICTOR flow permitted See note 2 LIQUID LINE OUTDOOR UNIT VALVE
25. ted Pair Wire 84X49 for outdoor sensor to ther mostat Required for use with SignatureStat 75VA 24VAC indoor unit transformer 12P61 Re quired when EDA unit is installed with a two stage heat pump system Humiditrol EDA Insulation and Piping Kit refer to ap plications information in Lennox Engineering Hand book 02 06 INSTALLATION SERVICE INSTRUCTIONS Humiditrol Enhanced Dehumidification ACCESSORIES Accessory EDA Units TIP Technical Publications 0206 s Litho U S A Supersedes 01 06 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE Table of Contents EDA Series Unit nene ants 1 Shipping amp Packing List 1 Other Required Components 1 General Information 1 Unit Dimensions 2 Installation Dimensions and Arrangement 3 Component Functions 4 General Installation Information 5 Electrical Wiring ur tyi eee ees 5 EDA Installation Flow Chart amp Procedures 5 Leak Testing Evacuation Charging 8 Insulating and Sealing the Unit 9 Other System Components 9 How the EDA Unit Works 10 Cooling Mode with Dehumidification ON 10 Cooling Mode Dehumidification OFF 11 Heating Mode Heat Pump Applications 11 Air Resistance Table
26. uickly 2 Refer to instructions provided with the outdoor unit for leak testing evacuating and charging procedures EDA 01 06 A IMPORTANT Prior to starting the outdoor unit for charging be sure the 3 way valve is energized and in the cool ing forward position see figure 7 3 Very little charge is required for the additional volume of the EDA unit When in normal cooling the compo nents will all be occupied by vapor that has very little weight At most depending on the model an addition al 1 4 pound of refrigerant may be required 4 When shifting from dehumidify mode to cooling or vice versa wait at least 10 minutes for the system to reach stable operating pressure before checking tem peratures and pressures or adjusting refrigerant charge NOTE Prior to starting the outdoor unit for charging set the thermostat to call for cooling dehumidification OFF It will take about 90 seconds for the 3 way di verting valve to energize and shift to the cooling posi tion To ensure that the 3 way diverting valve is ener gized and in the cooling forward position observe the position of the 3 way diverting valve actuator shaft setscrew in figure 7 if properly shifted the setscrew will be in the forward position Setting 3 Way Diverting Valve to Evacuate Position 1 PUSH RED TAB IN DIRECTION INDICATED 2 PUSH ACTUATOR SHAFT DOWN TOWARD THE CENTER OF TRAVEL POSITION COOLING FORWARD EVACU
Download Pdf Manuals
Related Search