Dometic VARC 48, Operation Manual

Page 1: ...ieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written consent by Dometic Corporation Every precaution has been taken i...

Page 2: ...erational Checks 7 Compressor Startup 7 SETPOINTS 8 Cooling 8 Heating 8 Compressor Staging Time 8 Run Mode Cooling 8 Run Mode Reverse Cycle Heating 8 Run Mode Electric Heating optional heater barrel 8...

Page 3: ...s in current on the generator The VARC48 also uses the advanced technology of an Electronic Expansion Valve EEV This provides more precise control of superheat across a broad range of conditions with...

Page 4: ...gation Pressing enter repeatedly will move it to that location Esc Button The Esc button is used to exit your present screen and take you back one screen Pressing it multiple times will take you back...

Page 5: ...icons will appear to view additional information Forward and back buttons will navigate to the next stage Trends Touching this icon will take you to the trending screen where you can view graphically...

Page 6: ...tem is in cooling Touch this icon to put the system in cool mode and the word cool will appear on the screen Heat Icon Heat will be illuminated only if the system is in heating Touch this icon to put...

Page 7: ...start up must be verified and cleared via the VARC before system will start normal operation Chilled Water Flow Switch With the system in either heating or cooling mode the Flow switch must be closed...

Page 8: ...s equipped with a temperature sensor mounted to the condenser coil This sensor is there to sense the coil temperature In heat mode if the coil temperature drops below 40 F the VARC controls will autom...

Page 9: ...met capacity demand it will reduce the speed of the compressors The compressors will operate at minimal speed to maintain the chilled water loop If the speed of the compressor still exceeds the demand...

Page 10: ...sor with the lowest running hours will be enabled first and compressor with the highest running hours will be disabled first First stage will be enabled and the compressor will start after CW and SW f...

Page 11: ...oil lubrication of the system o If the system calls for a stage to be toggled on off the next available stage will be used that meets the staging criteria o Load shedding will occur in multistage oper...

Page 12: ...screen will also indicate if there is an alarm present on the system by flashing the word alarm in the lower right hand corner The smaller PLD Pro LCD screen also has an audible tone that you will hea...

Page 13: ...e bottom of the screen the unit will display the envelope status for the operation of the compressor The envelope status basically tells you if the unit is functioning within the control parameters fo...

Page 14: ...Figure 14 Main Menu Items Screen Navigation Tree Press enter to select items to view and up down the screen will automatically return to the main status screen Menu A On Off Unit o Unit Address 1 Def...

Page 15: ...active relay outputs This will change depending on what is enabled in the system configuration o D Analog Outputs o NOT USED Menu E Alarm History Will capture the status of the following parameters a...

Page 16: ...sion the system and must select between yes or no then press enter This will save the information and once commissioned cannot be changed Sub Menu C Working Hours o Compressor o Run hours Actual o Num...

Page 17: ...ut Actual Value o Output Actual Value o Setpoint 8 9 Default o Band 11 0 Default o Integration Time 20 Default Sub Menu D User Save This is used to save any user specific settings o Save No Default Ye...

Page 18: ...Disabled o Stage 3 Enabled Default Disabled o Stage 4 Enabled Default Disabled Sub Menu F Manual Management This menu allows the technician to manually operate the relay outputs as well as enable or...

Page 19: ...ut 12 Amps 230 V Max Breaker 25 Amps 230 VAC Note Increase breaker size to include pump current if running pumps directly off system Maximum Ambient Operating Temperature 140 F 60 C Maximum Rh Conditi...

Page 20: ...18 Appendix I Touchscreen Navigation MAIN PAGE Figure 15 CHILLER ENABLE Figure 16...

Page 21: ...19 CHILLER SETPOINTS Figure 17...

Page 22: ...20 Figure 18 CHILLER STAGE Figure 19...

Page 23: ...21 Figure 20 PLC HMI Screen With an EEV installed you can monitor the valve position and view your suction pressure and temperature Superheat setpoint and actual will be displayed...

Page 24: ...22 TRENDS Figure 21 Figure 22...

Page 25: ...23 ACTIVE ALARMS Figure 23 ALARM HISTORY Figure 24...

Page 26: ...24 ALARM HELP Figure 25 Figure 26...

Page 27: ...25 REMOTE SUPPORT Figure 27 REMOTE ENABLE Figure 28...

Page 28: ...26 REMOTE CONFIGURATION Figure 29...

Page 29: ...mp F Discharge Temperature F Pressure psi Saturation Temp F Super heat temp F Subcooling temp F Varc 2 4 repeat as above Varc 1 information will show the stage the display is connected to Varc 1 Infor...

Page 30: ...its psi bar Clock Scheduler Date Hour Day DST Enable Disable DST Enable Transition Time Start End Input Output Analog Input Digital Input Relay Output Analog Outputs Analog Input CW Return Input B001...

Page 31: ...h Service Settings See page 30 Manual Management Analog Input Digital Input Relay Output Compressor EEV Analog Input Manual Control Manual Pos Status Value CW Return B001 On Off CW Supply B002 On Off...

Page 32: ...et F S2 probe F S3 offset psig S3 probe psig S4 offset F S4 probe F Working Hour Set Set Point Reset to Zero Run Hours Compressor h Yes No h Chilled Water Pump h Yes No h Seawater Pump h Yes No h Cont...

Page 33: ...e Buzzer Yes No Startup delay s Enable Unit by Digital Input On Off Supervisor On Off pLAN network On Off Schedule On Off Unit Control Custom 1 On Off Custom 2 On Off Custom 3 On Off Custom 4 On Off A...

Page 34: ...gs Flow Prove Delay s Off Delay s Reversing valve RV delay time s RV toggle time s Electric Heat Stage Up delay s Stage Down delay s Compressor Alarm Retry Setup Alarm Retry Setup Temperature Limits S...

Page 35: ...at fixed pos valve forced closed no action Use backup S3 valve at fixed pos valve forced closed no action valve at fixed pos valve forced closed no action Regulation Valve opening at start up Valve o...

Page 36: ...ag Current A Stator Resistance mOhm Rotor Resistance mOhm Stator Ld inductance mH Leakage factor Lq Inductance mH Speed Loop Kp Speed Loop Ki ms Magnetizing Time ms Starting Current A Freq for Start C...

Page 37: ...ff min variation bar Control period s Restart delay s Max Retry Speed Management Start up forced speed rps Max speed rps Min speed rps Deceleration rate rps s Acceleration rate rps s Switch off rate r...

Page 38: ...its Temp Press Other Temp Press Other Temp Press Other Digital Inputs Switches Enable Channel Action Delay Status Flow On Off Open Close s Open Close EH Flow On Off Open Close s Open Close High Pressu...

Page 39: ...37 Display Address Display Address Display address setting I O Board address Terminal config Terminal configuration P 02 Adr Priv Shared Trm1 Pr Sh Trm2 Pr Sh Trm3 Pr Sh...

Page 40: ...wired as part of the build process Please also note that as part of a correctly configured multistage system there is no need to set differential hysteresis settings Initial Wiring Seawater and chill...

Page 41: ...39 Basic wiring diagram...

Page 42: ...up then but cause networking problems later down the line Press Prg button to the left Scroll up or down to Technician if prompted for a password 3156 Select Information Scroll down for Version Repeat...

Page 43: ...down Enter Technician Password 3156 Go to stage address Hit enter change address to 2 for chiller 2 3 for chiller 3 etc Exit screen back to main menu and you will see confirmation of change in the to...

Page 44: ...ove and ensure display address and I O board address is correct for stage Press enter to go into the terminal config settings Trm1 17 for stage 2 18 if stage 3 etc and Pr ID 32 Sh this will allow for...

Page 45: ...make the following changes to each stage Press enter until the cursor is on Num of stages change from 1 to the correct number of stages for current system Repeat for all stages Go to Technician Scroll...

Page 46: ...r the press up and or down to select the correct day Press enter to select the year and or up down buttons to select the correct year Press enter again and the cursor drops down to the Hour field Use...

Page 47: ...45 Enabling Electric Heat Press Prg button Enter service password 3156 Scroll down to Electric Heat enter to select up or down to toggle setting Enter to save...

Page 48: ...wn to Temperature Units screen Hit enter to select Up or down button to toggle between options Once changed hit enter to return the cursor to the top of the screen You will need to make this change to...

Page 49: ...the screen 2 Insert USB memory 3 On the touch screen hold your finger on the screen until a pop window is displayed 4 Select update 5 Another pop up will appear and check the box that says Auto select...

Page 50: ...48 Deleting old program 1 Project manager a On the touch screen hold your finger on the screen until a pop window is displayed b Select Project Manager 2 Select the project you wish to delete...

Page 51: ...49 3 Click delete project then click yes to confirm 4 The screen will display the following as it in progress of deleting...

Page 52: ...nager screen will not display the project any longer Click X to exit out of the project manager window Setting Screen Address Time Backlight 1 Find a spot on the Touchscreen that is not a hot spot Tou...

Page 53: ...51 2 Select Show system settings 3 Use the Next or Back button to spin the wheel until you find Set Device Address...

Page 54: ...ss the Set Device Address button and you will get another screen 5 Touch the arrow button to select Com1 and change the 31 to 30 6 Then press ok to save changes and click X to close the Device Address...

Page 55: ...53 7 Use Next or Back to scroll to Display Settings 8 Select Display Settings...

Page 56: ...9 Click on the checkmark to automatically turn off backlight while on battery power and external power so they are not enabled as shown below 10 Press OK then click X 11 Now press Next to scroll to Ti...

Page 57: ...55 12 The Date Time Properties window will pop up Look at the time zone and select Eastern Time 13 The Current Time should show the correct time press OK then X to close window...

Page 58: ...ouchscreen remote screen Ensure you have a 24 Vdc supply to power the display and that the 3 core communication cable is correctly plugged into Serial port 1 not port 2 3 core communication cable term...

Page 59: ...while maintaining full functionality for the other stages Find below the instructions to access maintenance mode Enabling via PGD1 Display 1 Ensure unit mode is set to OFF In the main screen press ent...

Page 60: ...5 Scroll to Stage Disable press enter 6 For Stage Control change No to Yes press enter scroll up and press enter 7 The different stages will display on the screen press enter to access each stage and...

Page 61: ...59 Enabling via Touchscreen 1 Tap the touchscreen to view the menu buttons and select Chiller Summary 2 On Chiller Summary screen click on the wrench to access the maintenance mode pop up...

Page 62: ...l select Yes from the drop down menu this will enable Maintenance Mode 4 To disable a stage click on the drop down menu to the right of the stage number and select disabled Once complete press X to ex...

Page 63: ...clogged Check for defective flow switch Bleed air out of the loop water Check loop water pump High Discharge Pressure After 3 retries every 30 mins must be reset Manually Immediate Yes Shut off Unit C...

Page 64: ...Hours Exceeded Yes Off Heater Check heater voltage Envelope Alarm Manual 60 sec Yes Off compressor Clock Board Fault or Not connected Automatic Immediate Yes Warning Signal Inverter model not compatib...

Page 65: ...otor and motor cables for ground faults Check the input and output circuits for phase loss detection and rectify Check the condition of the motor and load wiring 16 Drive disabled 17 Motor Phase 18 Fa...

Page 66: ...ode Retain Mode Electric Heat No No No Logo Dometic BLK Dometic BLK Dometic BLK Background Ocean Ocean Ocean Flow Switch Yes Yes Yes High Pressure Switch Yes Yes Yes ow Pressure Switch No No No Load S...

Page 67: ...10 10 10 Minutes CW Flow 10 10 10 Seconds Retries 3 3 3 Retry delay 10 10 10 Minutes High Discharge Pressure 550 550 550 PSI Retries 3 3 3 Retry delay 30 30 30 Minutes High Pressure Switch Retry 3 3 3...

Page 68: ...re AI 7 B7 Discharge Pressure Digital Inputs DI 1 DI1 High Pressure Switch Optional DI 2 DI2 Low Pressure Switch Optional DI 3 DI3 Flow Switch DI 4 DI4 Load Shedding Input DI 5 DI5 Electric Heat Flow...

Page 69: ...67 VARC Standard Wiring Diagram Figure...

Page 70: ...68 NOTES...

Page 71: ...69 NOTES...

Page 72: ...es dometicusa com 24 7 TECH SUPPORT FOR UNITED STATES AND CANADA 8 00 AM to 5 00 PM Eastern Time 800 542 2477 After hours and weekends 888 440 4494 INTERNATIONAL SALES AND SERVICE Europe and the Middl...