1. MCS-MAGNUM EXV LOGIC Training Presentation www.mcscontrols.com Revision - 12/12/2015

2. MCS EXV CONTROL PRESENTATION 1. EXV CONTROLLER & VALVE a. Controller Description b. Wiring c. Specifications 2. BASIC CONTROLS (INFINITE CAPACITY) a. Set Points b. Control Zones 3. BASIC CONTROLS (STEP CAPACITY) a. Set Points b. Relay Outputs for steps 4. EXV ADAPTIVE CONTROL a. Rate of Change b. Load Adjust c. Low Suction Control

3. 6. EXV MODES, STATES & LOGIC CHART 5. LIQUID LEVEL CONTROL MCS EXV CONTROL PRESENTATION Continued 7. FINE TUNING YOUR MCS-EXV-DRIVER

4. EXV CONTROLLER & VALVE - DESCRIPTION - WIRING DIAGRAM - SPECIFICATIONS

5. MCS-EXV-DRIVER Standard 110 to 240 VAC ±10% (50/60 Hz) Option 24 VAC ± 10% (50/60 Hz) 2 position led display Auto / Manual operation Closes valve on power failure Eliminates need for Liquid Line Solenoid 33% faster valve operation CSA / UL approved

6. MCS-EXV-DRIVER WIRING Sporlan BLACKBLACK WHITEWHITE WHITE WIRE TO ANALOG OUTPUT BLACK & SHIELD TO ANALOG OUTPUT GROUND BLACK TO LINE 120/240 VAC WHITE TO NETURAL 120/240 REDRED GREENGREEN WHITEWHITE BLACKBLACK ELECTRIC EXPANSION VALVE

7. MCS-EXV-DRIVER WIRING Alco BLACKBLACK WHITEWHITE WHITE WIRE TO ANALOG OUTPUT BLACK & SHIELD TO ANALOG OUTPUT GROUND BLACK TO LINE 120/240 VAC WHITE TO NETURAL 120/240 BROWNBROWN BLUEBLUE WHITEWHITE BLACKBLACK ELECTRIC EXPANSION VALVE

8. MCS-EXV-DRIVER WIRING Danfoss BLACKBLACK WHITEWHITE WHITE WIRE TO ANALOG OUTPUT BLACK & SHIELD TO ANALOG OUTPUT GROUND BLACK TO LINE 120/240 VAC WHITE TO NETURAL 120/240 REDRED GREENGREEN WHITEWHITE BLACKBLACK ELECTRIC EXPANSION VALVE

9. MCS-EXV-DRIVER WIRING Carel BLACKBLACK WHITEWHITE WHITE WIRE TO ANALOG OUTPUT BLACK & SHIELD TO ANALOG OUTPUT GROUND BLACK TO LINE 120/240 VAC WHITE TO NETURAL 120/240 GREENGREEN YELLOWYELLOW BROWNBROWN WHITEWHITE ELECTRIC EXPANSION VALVE

10. Specifications Display# of StepsSPORLAN S11596SEI 0.5 to 11 S21596SER 1.5 to 20 S33193SEI 30; SDR –3, SDR-3x S42500 Sporlan SERI-G, -J, -K, -L Sporan SER-B, -C, -D, -F CDS -2, -4, -7 S56388 SEI-50, SHE (I)-100, -175, -400; CDS –9, -16, -17; SDR –4 Display# of StepsALCO A1750EX4 & EX5 A21660EX7 A32600EX8 Display# of StepsDANFOSS D12625ETS-12/25/50 D23530ETS-100 D33810ETS-250/400 Display# of StepsCAREL CL500E2V, E3V, E4V, E5V, E6V, E7V

11. MCS EXV BASIC CONTROL (Infinite Capacity Control) - SET POINTS - CONTROL ZONES

12. MCS-EXV-DRIVER SET POINTS (MCS CHILLER) #NAMEVALUETIMEMAX TIME ALLOWED 9SUPERHT TRGT10.548 10SPRHT + -1.5-- 11EXV LOAD ADJ0.6-- 12EXV FINE ADJ0.2-- 13EXV COURSE ADJ0.524 15EXV MIN%20.5-- 16EXV MAX%100-- 17LO SUPERHEAT1-- 18LOSUCTPSIDLY4-- 19EXV DELAY60-- 20EXV STRT TME5-- SH Target ± Ctl Zone SH Fine & Course Adj EXV Min & MAX % Timing Ctl Set Points

13. MCS-EXV-DRIVER SET POINTS (MCS CHILLER) #NAMEVALUETIMEMAX TIME ALLOWED 65EXV ZONE X11.5-- 66EXV ZONE X21.5-- 67EXV rocZONE10.2410 69EXV rocZONE20.3510 70EXV rocZONE30.4510 71EXV roc FAST11015 72EXV roc CHG0.81015 Individual Zone Ctl Individual ROC Ctl Zone 1 Speed Ctl

14. EXV ABOVE & BELOW ZONES BELOW ZONES < 6.0 CLOSING 4X COURSE ADJ * 2 @ QUARTER STEP DELAY 18 16 15 14 13 12 11 10 9 8 7 6 5 4 SUPERHEATSUPERHEAT CONTROL ZONE SPT 9 = 10.5 SP 10 = 1.5 9.0 TO 12.0 EXV IS HOLDING ROC CONTROL ZONE 1 ABOVE SPT 65 = 1.5 12.0 TO 13.5 EXV IS OPENING FINE ADJ @ STEP DELAY TIME ZONE 1 BELOW SP 65 = 1.5 7.5 TO 9.0 EXV IS CLOSING FINE ADJ @ STEP DELAY TIME ZONE 2 ABOVE SPT 66 = 1.5 13.5 TO 15.0 OPENING 2X COURSE ADJ @ HALF STEP DELAY ABOVE ZONES > 15.0 OPENING 4X COURSE ADJ * 2 @ QUARTER STEP DELAY ZONE 2 BELOW SPT 66 = 1.5 6.0 TO 7.5 CLOSING 2X COURSE ADJ @ HALF STEP DELAY

15. MCS EXV BASIC CONTROL (Step Capacity Control) - SET POINTS - RELAY OUTPUT SETUP FOR STEPS

16. MCS-EXV-DRIVER SET POINTS #NAMEVALUETIMEMAX TIME ALLOWED 9SUPERHT TRGT10.548 10SPRHT + -1.5-- 12EXV FINE ADJ0.2-- 13EXV COURSE ADJ0.5-- 14EXV LOAD DIV3-- With EXV Step Control the following Set Points are changed: SP 11, ‘EXV LOAD ADJUST’ is deleted SP 14, ‘EXV LOAD DIV’ is added As the Amp draw % changes this divides the EXV % change calculated as the ratio of slide movement to valve movement [(Max slide% – min slide%) / (Max vlv% - min vlv%)] +1 No Change

17. 15EXV MIN%10-- 16EXV MAX%100-- 17LO SUPERHEAT2120 18LOSUCTPSIDLY4-- 19EXV DELAY60-- 20EXV STRT TME510 MCS-EXV-DRIVER SET POINTS The remaining set points remain active with the following changes: SP 17 TIME & MAX TIME ALLOWED are setup #NAMEVALUETIMEMAX TIME ALLOWED No Change

18. MCS RELAY OUTPUT CFG SETUP (Step Capacity Control) -Cfg RO screen when Type = Step w\ EXV setup following: EXV Starting % when this compressor is the lead EXV Load Adjust %, the % increase to apply to the current EXV opening when this compressor is not the lead and is started EXV Unld adjust %, the % decrease to apply to the current EXV opening when this compressor is not the last compressor and is turned off

19. MCS RELAY OUTPUT MCS-CONNECT EXV START WHEN LEAD COMPRESSOR STARTING % COMPRESSOR TIME IN STARTUP

20. EXV ADAPTIVE CONTROL - LOAD ADJUSTMENT - RATE of CHANGE - LOW SUCTION CONTROL

21. MCS EXV ROC FUNCTION (MCS CHILLER) #NAMEVALUETIMEMAX TIME ALLOWED 9SUPERHT TRGT10.548 - TIME field in set point 9 is the number of seconds to look at the slope of the superheat (ROC). - MAX TIME ALLOWED field is the maximum value the TIME field can be set to.

22. MCS EXV ROC FUNCTION (MCS CHILLER) - VALUE field in set points is the ROC allowed for that zone - TIME field is the minimum time the EXV is kept in the HOLDING state. #NAMEVALUETIMEMAX TIME ALLOWED 67EXV rocZONE10.2410 69EXV rocZONE20.3510 70EXV rocZONE30.4510

23. MCS EXV ROC FUNCTION (Special Action) Super Heat Below Control Zone-  If in Zone 1 and the EXV ROC is positive and > then SP 67 then hold for number of seconds in time field.  If in Zone 2 and the EXV ROC is positive and > then SP 69 then hold for number of seconds in time field.  If in Zone 3 and the EXV ROC is positive and > then SP 70 then hold for number of seconds in time field. Super Heat Above Control Zone-  If above zones and the EXV ROC is negative and < then SP 70 then hold for number of seconds in time field.  If in Zone 2 and the EXV ROC is negative and < then SP 69 then hold for number of seconds in time field.  If in Zone 1 and the EXV ROC is negative and < then SP 67 then hold for number of seconds in time field.

24. MCS EXV ROC FUNCTION (Special Action)  EXV ROC FAST-  If we are opening or closing at 2x, if the absolute value of the super heat ROC is > than the value in SP 71 we will hold for the time in SP 71.  EXV ROC CHG-  If the super heat state is ‘EXV is HOLDING’ this value specifies the maximum value of the change % that can be made.

25. MCS EXV LOAD ADJ FUNCTION (MCS CHILLER) #NAMEVALUETIMEMAX TIME ALLOWED 9SUPERHT TRGT10.548 - VALUE field, in EXV LOAD ADJ, is the value the EXV will be adjusted each time the compressor capacity is adjusted. Used on modulating compressors. 11EXV LOAD ADJ0.6--

26. MCS EXV LOW SUCTION ADJUSTMENT HOW IT NORMALLY OCCURS  Condenser is sized for high ambient  We have a low ambient condition  Usually when the last stage of condensing is turned on WHAT NORMALLY HAPPENS  Because of the pressure drop some of the liquid boils off before it gets to the EXV  Now you have liquid and vapor mixed requiring the EXV to open  This occurs within 1 minute and system returns to normal in about 3 minutes.

27. GRAPH OF LOW SUCTION OCCURING Notice the 3 rd stage of condensing comes on 15 seconds later the suction psi crashes

28. MCS EXV LOW SUCTION ADJUSTMENT (MCS CHILLER) #NAMEVALUETIMEMAX TIME ALLOWED 13EXV COURSE ADJ0.545 18LOSUCTPSIDLY2-- 19EXV DELAY60--  Once the Magnum has determined it is in a LOW SUCTION situation it will take the EXV COURSE ADJ and multiply it by the value in the TIME field of SP 13. It will continue to make this adjustment, based on the value in Set Point 56 ‘PULSE or CMP LOAD DELAY’ until the situation is cleared.

29. MCS-EXV FLOODED LEVEL CONTROL #NAMEVALUETIMEMAX TIME ALLOWED 9REFR LVL TRG41.520 10REFR ZONE + -100 12EXV FINE ADJ0.2-- 13EXV COURSE ADJ0.5-- 15EXV MIN%10-- 16EXV MAX%100-- 18LOSUCTPSIDLY4-- 19EXV DELAY60-- 20EXV STRT TME510 -EXV set points 9 & 10 now reflect refrigerant level -EXV other set points remain same No Change

30. MCS-EXV FLOODED LEVEL CONTROL New Set Points #NAMEVALUETIMEMAX TIME ALLOWED 109HI REFR LEVEL50.0-- 217LOW REFR LEVEL32.5-- -Set point 9 & 217 specify the range that will be used to maintain and even refrigeration level when required. -Set point 109 specifies the upper limit and will cause a safety shutdown. 9REFR LVL TRG41.520

31. EXV UNIT MODES & STATES - EXV STATES - EXV DRIVER MODES - EXV LOGIC CHART

32. MCS EXV Unit Modes  Auto Mode – The unit defaults to this mode after every power up. In this mode, the MCS-EVX-DRIVER-XX positions the valve according to the analog input control voltage.  Manual Mode – When in auto mode, holding the ‘Auto/Manual’ key for 5 seconds, then entering the authorization number switches the unit into Manual mode. In this mode, the valve position is controlled with the keypad’s directional arrows.  Power Down Mode – If the main power is disconnected, the controller switches to the power down mode. In this mode, the controller uses internal power to close the expansion valve.

33. MCS EXV Controller States STATEDESCRIPTION LOCKED OUTThe compressor is in a Lockout state. EXV IS CLOSEDThe associated compressor is OFF and the valve is closed. PRE-PMPDWNThe valve has been in a closed state while the system goes through a pump down. EXV IN STARTUPAt startup the valve will remain in this state for the time in Set Point #20. At that time the state will be changed to holding, at this point the valve control logic will position the valve. EXV AT 100%This state will be entered when the valve opening reaches 100%. EXV IS HOLDINGRefer to EXV Logic Chart, superheat is in control zone and ROC is acceptable. EXV IS OPENINGRefer to EXV Logic Chart, superheat is in control zone but rising too fast, ROC less than 1.0. EXV IS CLOSINGRefer to EXV Logic Chart, superheat is in the control zone and the rate of change is acceptable, ROC greater than -0.5. LOW SPRHTRefer to EXV Logic Chart, force a course valve adjustment.

34. EXV State Controller States (Continued) STATEDESCRIPTION OPENING 4x Refer to EXV Logic Chart, superheat is above control zone. OPENING 2x Refer to EXV Logic Chart, superheat is in control zone but rising too fast, the ROC is greater than 1.0. LO PSI OPN Refer to EXV Logic Chart, state indicates that a low suction pressure condition exists. The suction pressure is less than Set point #77 “LOW SUCTION” plus twice the value of Set point #79 “LOW SUCT RELOAD” and the superheat is greater than Set point #9 “SUPERHT TRGT” plus twice the value of Set point #10 “SPRHT ZONE+-.” CLOSING 2x Refer to EXV Logic Chart, superheat is in the control zone and the rate of change is acceptable, the ROC is less than -0.5 and greater than -1.0. CLOSING 4x Refer to EXV Logic Chart, superheat is in control zone but falling too fast, ROC less than -1.0.

35. EXV State Controller States (Continued) STATEDESCRIPTION HI LVL CLS This state indicates that a high refrigerant level. This state is entered if Set point #109 “HiRefLevel” is active and the superheat is greater than the value of this Set point. EXV MOP CLS Refer to EXV Logic Chart. Maximum operating pressure option is active and it is forcing the EXV to close. In this state the EXV valve’s opening will be reduced. EXV MOP HLD Refer to EXV Logic Chart. Maximum operating pressure option is active and it is forcing the EXV to hold.

36. EXV LOGIC CHART

37. FINE TUNING YOUR MCS-EXV-DRIVER Part 1 Verify what has been done. 1.Completed the MCS EXV DRIVER setup specifying valve type. 2.Completed the setup for starting valve position in cfg. 3.If a modulating compressor verify starting % is set. Using MCS-Connect, review start up. 1.Set history sample rate at 1 sec 2.Place RUN/STOP switch to RUN

38. FINE TUNING YOUR MCS-EXV-DRIVER Part 2 Normal MCS CONTROLLER start up. 1.At 2 to 3 minutes from compressor starting, suction superheat should be between ± Control Zone 1. a.If above Control Zone 1 increase starting valve opening %. b.If below Control Zone 1 decrease starting valve opening %. 2.At end of startup Discharge temperature should be 110°F or higher. a.If less than 105 ° F and we have a modulating compressor and the load is adequate increase the startup speed. b.Otherwise increase the startup time. 3.Watch changing capacity, if superheat is moving too much as capacity changes, lower LOAD ADJUST set point. 4.Pull Graph at about 15 minutes after starting, this will allow you to review startup results. 5.If Unit is stable but EXV is hunting check time in superheat target. The length of time to calculate superheat ROC should be no less then 3 and no higher than 8. If hunting lower by 1 and watch results.

39. For additional information please visit our website www.mcscontrols.com Or call MCS at 239-694-0089