DOMETIC MARINE VARCX60 (01) PDF MANUAL

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF USER GUIDE

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF USER MANUAL

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF OWNER GUIDE

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF OWNER MANUAL

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF REFERENCE GUIDE

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF INSTRUCTION GUIDE

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF REFERENCE MANUAL

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF INSTRUCTION MANUAL

FREE ENGLISH DOMETIC MARINE VARCX60 (01) PDF OPERATING INSTRUCTIONS

CLICK HERE TO DOWNLOAD DOMETIC MARINE VARCX60 (01) PDF MANUAL

If this is not the document you want for this product, click here to see if we have any other documents for this product.

DOMETIC MARINE VARCX60 (01) PDF SUMMARY:

What does the Dometic Variable Capacity Chiller (VARC) include?

The Dometic Variable Capacity Chiller (VARC) includes a microcontroller-based unit to control multiple chillers. The multiple-chiller design provides flexibility in the control application and improved controls and system protection.

What are the key design features of the VARC?

The key design features of the VARC are: a precision Proportional Integral Derivative (PID) loop control algorithm, an Electronic Expansion Valve (EEV), internal grounding with isolation between inputs and outputs, and output relays with double isolation. The system uses NTC type 10K@77° thermistors for temperature measurements and ratiometric 0–650 PSI (45 bar) range pressure transducers for suction and discharge monitoring.

How does the PID loop control algorithm manage the capacity requirements of the system?

The PID loop control algorithm manages the capacity requirements of the system by modulating the compressor speed and balancing chiller output with the required load. The PID system modulates the speed of the compressor to increase or decrease its capacity, allowing for reduced current consumption by the electrical system. This smooth operation eliminates large swings in current on the generator. The variable capacity chiller uses an inverter to modulate the speed of the compressor to achieve the desired chilled water setpoint, allowing the compressor to run at a minimum speed of 30 Hz to a maximum of 240 Hz depending on compressor model.

What advanced technology does the VARC use?

The VARC uses the advanced technology of an Electronic Expansion Valve (EEV).

What does the Electronic Expansion Valve (EEV) provide?

The Electronic Expansion Valve (EEV) provides more precise control of superheat across a broad range of conditions with no erratic swings as the valve reacts to temperature and pressure changes. The VARC maintains superior superheat control over extreme operating conditions using an advanced algorithm.

What does the built-in VARC control application support?

The built-in VARC control application supports: selection and sequencing of up to six chillers, selection and sequencing of one Chilled Water Pump (CWP) and one or more Sea Water Pumps (SWP), selection and sequencing of up to six electric heaters, sequencing of devices for run time equalization, alarms and interlocks, load shedding, and troubleshooting help. Sequencing for chillers, pumps, and heaters is the order in which they start up and turn off. Sequencing is based on run time, which is the amount of hours a specific compressor, pump, or heater has run.

What modes can users select in a single-stage configuration?

Users can select Normal, Econo, or Boost mode operation in a single-stage configuration.

What does the PGD1 LCD Display provide?

The PGD1 provides an LCD display and six buttons for navigating the control software.

What does the PLDPRO LCD Display provide?

The PLDPRO provides an LCD display and six buttons for navigating the control software.

How do the buttons on the PGD1 and PLDPRO operate?

The buttons on the PGD1 and PLDPRO operate as follows:

  • Alarm: This button flashes red if there is an active alarm. Pressing this button displays the active alarm screen.
  • Program: This button displays the system menus. Use the scroll buttons to step through the options. Press the Enter button to select an option.
  • Escape: This button exits the current screen and displays the previous screen. Pressing this button multiple times displays the Main screen.
  • Scroll Up and Scroll Down: These buttons step through available menu options, change values in fields such as setpoints, and navigate from page to page when the flashing cursor is in the upper-left corner.
  • Enter: This button confirms menu option selections. Pressing Enter repeatedly moves the cursor the upper-left corner.

How do the navigation buttons on the Main screen function?

The navigation buttons on the Main screen function as follows:

  • Enable: Enter setpoints, monitor chilled water temperatures, and monitor pump current information.
  • Summary: View the state of HP, EH, FS, and water temperature for all available stages. Tapping a stage displays additional information on that stage.
  • Chiller Stage: Monitors the refrigerant and chilled water circuits. Provides hotspot icons that display additional information when selected. Different icons appear depending on which options are installed. The Forward and Back buttons navigate between stages.
  • Trends: View a graphical display of water temperature, water pressure, and compressor current. Data is downloadable to a USB memory stick.
  • Alarms: View and clear alarms. Pressing the buttons at the top-right displays alarm history and other alarm information.
  • Remote Support: Enable third-party technical support to view your system over an Internet connection using a VNC (Virtual Network Computing) server.

What does the VARC allow you to monitor?

The VARC allows you to monitor analog inputs, digital inputs, and relay outputs to determine the status of the system.

What happens if a temperature sensor is defective or not connected?

If a temperature sensor is defective or not connected, the VARC generates an alarm for that sensor.

What does the Chilled Water Return Temperature Sensor (AI-1 B1) detect?

The chilled water supply sensor is continuously monitored whether in Cooling, Reverse Cycle, or Electric Heat mode. It detects a high-temperature condition in the supply water from the chiller.

What happens if the chilled water temperature is greater than or equal to 125 °F (52 °C)?

If the chilled water temperature is greater than or equal to 125 °F (52 °C), the following occurs:

  • In Reverse Cycle mode, all enabled compressor relays are de-energized, turning off the compressors.
  • In Electric Heating mode, all enabled heater relays are de-energized, turning off the heating elements.
  • A high temperature fault is generated.
  • The compressor or electric heat relay re-energizes when the temperature drops to 110 °F (43 °C).

What must you do before re-enabling the VARC or the disabled stage after a high temperature fault?

You must acknowledge and clear the fault prior to re-enabling the VARC or the disabled stage.

What does the Freeze Temperature Setpoint (AI-2 B2) detect?

The chilled water supply sensor is continuously monitored whether in Cooling, Reverse Cycle, or Electric Heat mode. It detects a freeze condition in the supply water of the chiller.

What happens if the chilled water temperature is equal to or less than 36 °F (2 °C)?

If the chilled water temperature is equal to or less than 36 °F (2 °C), the following occurs:

  • The compressor relay is de-energized, shutting off the compressor.
  • A low temperature fault is generated.
  • The compressor relay re-energizes when the temperature reaches 42 °F (6 °C).

What must you do before re-enabling the VARC or the disabled stage after a low temperature fault?

You must acknowledge and clear the fault prior to re-enabling the VARC or the disabled stage.

What does the Condenser Freeze Protection (AI-3 B3) do?

The condenser outlet refrigerant temperature sensor monitors the condenser coil temperature. In Heat mode, if the coil temperature drops below 30 °F (-1 °C), the VARC automatically lowers the speed of the compressor to half the speed that it was currently running. While performing this operation, the display indicates Freeze Defrost.

What does the Suction Pressure 1 (AI-6 B6) monitor?

The VARC continuously monitors the suction pressure. If the suction pressure is below the alarm setpoint for longer than the programmed time delay, a Low Suction Pressure fault is generated.

What must you do before re-enabling the VARC or the disabled stage after a Low Suction Pressure fault?

You must acknowledge and clear the fault prior to re-enabling the VARC or the disabled stage.

What does the Discharge Pressure 1 (AI-7 B7) monitor?

The VARC continuously monitors the discharge pressure. If the discharge pressure is above the alarm setpoint for longer than the programmed time, a High Discharge Pressure fault is generated.

What must you do before re-enabling the VARC or the disabled stage after a High Discharge Pressure fault?

You must acknowledge and clear the fault prior to re-enabling the VARC or the disabled stage.

What does the Pump Current Monitoring (AI-9 (CW) AI-10 (SW) B-9 (CW) B-10 (SW)) do?

Pump current monitoring for the chilled water and Sea Water Pump (SWP) is an optional feature that requires the medium-sized PLC, instead of the standard smaller version. With this option, you can view the current draw from each pump on the PGD1 display and the touch screen.

What happens if the high pressure switch is tripped and turns off the compressor?

If the high pressure switch is tripped and turns off the compressor, the VARC acknowledges an open circuit and generates a High Discharge Pressure fault. The VARC will not allow the compressor relay to be re-energized until the high pressure switch is in the closed position.

What must you do before re-enabling the VARC or the disabled stage after a High Discharge Pressure fault?

You must acknowledge and clear the fault prior to re-enabling the VARC or the disabled stage.

What does the Econo Mode Selection (DI-2 DI-2) do?

This optional input is used to put the VARC into Econo mode. While Econo mode is enabled by this input, the VARC cannot be put into Normal or Boost mode.

What happens if flow is lost for more than 10 consecutive seconds when the VARC is in either Heat or Cool mode?

With the VARC in either Heat or Cool mode, the Flow switch must be closed prior to system starting or a stage being enabled. In operation, if flow is lost for more than 10 consecutive seconds, the following occurs:

  • The compressor or heat relay is disabled for the stage that has lost flow.
  • A Chilled Water Flow fault is generated.
  • The VARC goes into lockout.
  • A manual restart is required, after the system initiates, retries, and fails or exceeds timeout.

What must you do before re-enabling the VARC or the disabled stage after a Chilled Water Flow fault?

You must acknowledge and clear the fault prior to re-enabling the VARC or the disabled stage.

What happens when load shedding becomes active?

The load shedding standard input is activated with a 230 V signal. When load shedding becomes active, the VARC shuts off the compressor and maintains that state until the load shedding input is disabled. In a multi-stage operation, load shedding shuts down the stage with the highest run hours. Every unit has a load shed input. The number of load shedding signals received (one per unit) determines how many units are shut off according to run hours.

What happens if flow is lost for more than 10 consecutive seconds when the VARC is in either Heat or Cool mode and the Electric Heat (E. H.) Flow Switch (DI-5 DI-5) is enabled?

With the VARC in either Heat or Cool mode, the Flow switch must be closed prior to system starting or a stage being enabled. In operation, if flow is lost for more than 10 consecutive seconds, the following occurs:

  • The electric heat is disabled for the stage that has lost flow.
  • An Electric Heat Flow fault is generated.
  • The VARC goes into lockout.
  • A manual restart is required, after the system initiates, retries, and fails or exceeds timeout.

What must you do before re-enabling the VARC or the disabled stage after an Electric Heat Flow fault?

You must acknowledge and clear the fault prior to re-enabling the VARC or the disabled stage.

What do the Cool Mode Selection Switches (DI-6 DI-6) and Heat Mode Selection Switches (DI-7 DI-7) allow for?

These switches allow for remote mode control. When using digital input mode selection, the display cannot be used to change mode, but all other functions on the display are available.

What does the SWP (DO-1 NO1) provide?

Provides switched power to the contactor coils for the Sea Water Pump.

What does the CWP (DO-2 NO2) provide?

Provides switched power to the contactor coils for the Chilled Water Pump.

What does the Reversing Valve (RV) (DO-3 NO3) provide?

Provides switched power to the coils for the Reversing Valve.

What does the Electric Heat (EH) (DO-4 NO4) provide?

Provides switched power to the contactor coils for electric heat.

What does the Fault Alarm (DO-7 NO7/NC7) provide?

Provides a Normally Open (NO) contact point, which is closed for any fault condition. You can use this output to power a light, relay, or interface to a ship’s monitoring system. The output on this terminal is 230 VAC.

What are the default parameters for the VARCX60 compressor and inverter?

The default compressor is TNB306FPGMT, and the default inverter is PSD1* 12 Amp.

What are the default general settings for the VARCX60?

The default general settings for the VARCX60 are:

  • Cooling Setpoint CCW Return: 48 Degrees F
  • Cooling Setpoint CCW Supply: 43 Degrees F
  • Heating Setpoint: 110 Degrees F
  • Econo Mode: 65% Percent
  • Superheat Setpoint Cool and Heat: 10 Degrees F

What are the default factory settings for the VARCX60?

The default factory settings for the VARCX60 are:

  • Control Temp Mode: CCW Supply
  • Number of Stages: 1
  • Electric Heat: No
  • Power Cycle Retain Mode: Retain Mode
  • Logo: Dometic BLK
  • Background: Ocean
  • Flow Switch: Yes
  • High Pressure Switch: Yes
  • Low Pressure Switch: No
  • EH Flow Switch: No
  • Load Shedding: Yes
  • SW Temp Inlet: Yes

What are the default Sea Water Pump Settings for the VARCX60?

The default Sea Water Pump Settings for the VARCX60 are:

  • Control By: Demand
  • Off Delay: 5 Seconds
  • Pump Current: No
  • Current Selection: 10 Amps
  • Pump Control: Master

What are the default Chilled Water Pump Settings for the VARCX60?

The default Chilled Water Pump Settings for the VARCX60 are:

  • Control: Continuous
  • Flow Prove Delay: 10 Seconds
  • Off Delay: 5 Seconds
  • Pump Current: No
  • Current Selection: 10 Amps

What are the default Reversing Valve settings for the VARCX60?

The default RV Delay On Time is 45 Seconds.

What are the default Electric Heat settings for the VARCX60?

The default Electric Heat settings for the VARCX60 are:

  • Stage Up Delay: 60 Seconds
  • Stage Down Delay: 20 Seconds

What are the default Compressor settings for the VARCX60?

The default Compressor settings for the VARCX60 are:

  • Min On Time: 60 Seconds
  • Min Off Time: 10 Seconds
  • Min Time between Starts: 60 Seconds
  • Load Up Time: 10 Seconds
  • Force Rotation: 12 Hours
  • Load Up Stg Delay: 60 Seconds
  • Avg Supply Delay: 240 Seconds

What are the default Condenser Frost Protection settings for the VARCX60?

The default Condenser Frost Protection settings for the VARCX60 are:

  • Cond Setpoint: 30 Degrees F
  • Cond Band: 2.5 Degrees F
  • Comp Speed: 40 RPS

What are the default Compressor PID settings for the VARCX60?

The default Compressor PID settings for the VARCX60 are:

  • Cntrl: P
  • K: 50

What are the default Chilled Water High Temperature Limit Alarm settings for the VARCX60?

The default Chilled Water High Temperature Limit Alarm settings for the VARCX60 are:

  • Setpoint: 125 Degrees F
  • Off Band (SP-): 15 Degrees F
  • Retries: 6
  • Retry Timeout: 30 Minutes
  • Retry Delay: 120 Seconds

What are the default Chilled Water Freeze Limit Alarm settings for the VARCX60?

The default Chilled Water Freeze Limit Alarm settings for the VARCX60 are:

  • Setpoint: 36 Degrees F
  • Off Band (SP+): 5.4 Degrees F
  • Retries: 6
  • Retry Timeout: 10 Minutes
  • Retry Delay: 120 Seconds

What are the default Chilled Water Flow Alarm settings for the VARCX60?

The default Chilled Water Flow Alarm settings for the VARCX60 are:

  • Retries: 6
  • Retry Timeout: 10 Minutes
  • Retry Delay: 120 Seconds

What are the default High Discharge Pressure Alarm settings for the VARCX60?

The default High Discharge Pressure Alarm settings for the VARCX60 are:

  • Retries: 6
  • Retry Timeout: 30 Minutes
  • Retry Delay: 120 Seconds

What are the default High Pressure Switch Alarm settings?

The default High Pressure Switch Alarm settings are:

  • Retry: 6
  • Retry Timeout: 30 Minutes
  • Retry Delay: 120 Seconds

What are the default Low Suction Alarm settings for the VARCX60?

The default Low Suction Alarm settings for the VARCX60 are:

  • Low Suction Pressure: 60 PSI
  • Delay: 180 Seconds
  • Retries: 6
  • Retry Timeout: 30 Minutes
  • Retry Delay: 120 Seconds

What are the default Inverter Alarm settings?

The default Inverter Alarm settings are:

  • Retry: 15
  • Retry Timeout: 60 Minutes
  • Retry Delay: 300 Seconds

What are the default Configuration Menu settings?

The default Configuration Menu settings are:

  • Temperature Units: Degrees F
  • Pressure Units: PSI

What is the VARC Chiller Control?

The VARC Chiller Control is a chiller control application that supports touch screen and LCD interfaces.

What should you do to install a staged system?

Installation for a staged system requires the following steps:

  1. Make the connections between each stage of the chilled water and sea water.
  2. Make the network connections between each stage (physical and network addressing).
  3. Check the firmware version.
  4. Configure the remote control panel.

What should you do for initial wiring?

To do initial wiring:

  1. Wire the sea water and chilled water pumps to VARC 1 (no need for pump relays) as follows:

    • Remove the power cover.
    • Connect the pumps to the terminals on the front of chiller 1, according to labeled connections.

    Note: Daisy chaining outputs is not recommended if the units have individual power sources. Verify the phase of power before daisy chaining the outputs.

  2. Wire the network connections from the network connection ports (VARC 1 to VARC 2, VARC 2 to VARC 3, and so forth).

How do you wire multiple VARC stages?

The following steps describe how to wire multiple VARC stages:

  1. Make the connections between each stage of the chilled water and sea water.
  2. Make the network connections between each stage (physical and network addressing).

How do you connect the touch screen?

Make the following connections to the touch screen:

  • A 24 VDC supply to power the display
  • A three-core communication cable connected to serial port 1, not port 2

Terminate the three-core communication cable on Terminal Bus 3 (Modbus Com) on VARC 1.

How do you view the firmware version of a stage?

To view the firmware version of a stage:

  1. Press the Program button.
  2. Scroll up or down to Technician, and then press Enter. If prompted for a password, enter 3156.
  3. Select Information.

The Information screen is displayed.

  1. Scroll down to view version information.
  2. Repeat for each stage.

Verify that all stages have the same version number.

How do you set up networking?

To set up networking, follow these steps:

  1. Power off all stages except stage 2.
  2. Press the Program button.
  3. Go to Technician.
  4. Scroll down to Service settings, then press Enter.
  5. For Service Password, enter 3156.
  6. Go to Stage Address.
  7. Press Enter, then change the address to 2 for chiller 2, 3 for chiller 3, and so forth.
  8. Press the Scroll Down button to display the next screen and change the number of stages. Press Enter until the cursor is on Num of Stages, then change from 1 to the correct number of stages for the current system.
  9. Repeat steps 2-8 for additional stages.
  10. For stage 1, only perform step 8 to change the total number of stages.

How do you configure display addresses?

To configure display addresses:

  1. Display the configuration screen:
    • PGD1: Press and hold the Up, Enter, and Down buttons simultaneously for 6 seconds.
    • PLDPRO: Press and hold the Up, Down, and Program Mode buttons simultaneously for 6 seconds.
  2. Press Enter to access the Display address setting, and then scroll up or down to reach the address of the display per stage:
    • Stage 1: 16
    • Stage 2: 17
    • Stage 3: 18
    • Stage 4: 19
    • Stage 5: 20
    • Stage 6: 21

The message “Display address has been changed” appears, and then the display goes blank.

  1. Repeat the three-button push from step 1 to enter the configuration.
  2. Press Enter three times or until you reach the next screen.
  3. Press Enter to go to the next screen.
  4. Follow these steps to select the address for Trm1 & 2 and select if it is private or shared:

    • Press enter once to enter the address of Trm1, and then scroll up or down to select the appropriate address (for addresses, see step 2).

    • Press Enter.

    • The cursor under Priv/Shared begins flashing.

    • Scroll up or down to select Pr, then press Enter. The cursor is next to Trm2.

    • Scroll up or down to select 32, then press Enter.

    • Scroll up or down to select Sh, then press Enter.

    • Press Enter two more times. The cursor is next to Ok?No.

    • Scroll to select Yes, then press Enter.

  5. Connect all stages together with the network cable.

The data for all of the stages appears on the main screen.

  1. If using a single common display or remote display, it must be configured as address 32.

What operational modes does the VARC provide?

The VARC provides Cool mode, Heat mode, and Electric Heat mode. The VARC also has Econo mode and a Maintenance mode for troubleshooting.

How can the operational modes be selected?

The operational modes can also be selected using the digital inputs if wired to the control board. These inputs allow you to select Econo mode if enabled for either cool or heat mode. Cool and Reverse cycle Heat mode can be selected by using the digital input controls. These inputs do not support Electric heat operation.

What happens when Cool is selected on the touch screen or the LCD buttons?

When Cool is selected on the touch screen or the LCD buttons, the VARC starts cooling according to the temperature setpoint. The pumps operate as described in “Pump Operation”.

What is the activity in Cool mode?

Cool mode activity is as follows:

  • If the return water/supply water temperature is above the cooling setpoint and the staging delay has elapsed, the board energizes the compressor relay.
  • The compressor continues to run until the cooling setpoint has been reached or an alarm condition exists.
  • A stage has a minimum run time of 60 seconds before it can be turned off and a minimum off time of 10 seconds before it can be re-enabled. This minimum on time is required to ensure that the system is not cycling on and off and thereby not allowing the compressor to properly warm-up, which ensures proper oil lubrication of the system.
  • If the system calls for a stage to be toggled on or off, the next available stage that meets the staging criteria is used.
  • Load shedding occurs in multi-stage operation when approaching the chilled water setpoint.

How is compressor rotation active during run mode?

Compressor rotation is active during run mode:

  • The compressor with the lowest running hours is enabled first, and the compressor with the highest running hours is disabled first.
  • After chilled water and sea water flows are stable for 10 seconds (default), the first stage is enabled, and the compressor starts.
  • The first stage continues to run up to 100 percent speed before enabling the next stage.
  • If the PID loop requires demand, then the next stage is enabled with a startup delay of three minutes before running up to required speed.

What happens when Heat is selected on the touch screen or the LCD buttons?

When Heat is selected on the touch screen or the LCD buttons, the VARC starts heating according to the temperature setpoint. The pumps operate as described in “Pump Operation”.

What is the activity in Heat mode?

Heat mode activity is as follows:

  • There is a 45-second delay after the compressor ramps up before it is energized.
  • The reversing valve relay is energized to operate the VARC in Reverse Cycle Heat mode.
  • If the return/supply water temperature is below the programmed heating setpoint and the staging delay has elapsed, the VARC energizes the compressor relay.
  • The compressor continues to run and the reversing valve remains energized until the heating setpoint has been reached or an alarm condition exists.
  • If the setpoint is reached, the compressor reduces its speed to maintain the water temperature. Once it has reached temperature and a hysteresis of one degree, the compressor turns off and the reversing valve turns off immediately.
  • A stage has a minimum run time of 60 seconds before it can be turned off and a minimum off time of 10 seconds before it can be re-enabled. If the system calls for a stage to be toggled on or off, the next available stage that meets the staging criteria is used.

How is compressor rotation active during run mode in Heat mode?

Compressor rotation is active during run mode:

  • The compressor with the lowest running hours is enabled first and compressor with the highest running hours is disabled first.
  • Enable Reverse Cycle Heat only for the system.
  • After chilled water and sea water flows are stable for 10 seconds (default), the first stage is enabled and the compressor starts.
  • The first stage continues to run up to 100 percent speed before enabling the next stage.
  • If the PID loop requires demand, the next stage is enabled with a startup delay of three minutes before running up to the required speed.

What happens when Electric Heat is selected on the touch screen or LCD buttons?

When Electric Heat is selected on the touch screen or LCD buttons, the VARC starts heating according to the temperature setpoint. The VARC energizes the heater relay if return/supply water temperature is below the programmed setpoint and the staging delay has elapsed in a multi-stage configuration.

How is heater rotation active during run mode?

Heater rotation is active during run mode:

  • The heater with the lowest running hours is enabled first and the heater with the highest running hours is disabled first.
  • Enable Electric Heat only for the system.
  • After chilled water flow is stable for 10 seconds, the first stage is enabled and the electric heater starts.
  • The first stage continues to run for five minutes before enabling the next stage.
  • If the PID loop requires demand, the next stage is enabled.

How does the Chilled Water Pump operate?

The chilled water pump relay closes if the system is in Heat or Cool mode. The pump is enabled five seconds prior to the first stage being enabled. The pump is on for continuous operation when system is enabled.

How does the Sea Water Pump operate?

The sea water pump has selectable operating modes between continuous operation or cycle-with-compressor operation. The default configuration is to cycle with the demand. The sea water pump relay closes five seconds before the compressor starts in Heat or Cool modes. It opens five seconds after the last compressor cycle is completed. If immersion heating is available and used, the sea water pump is disabled.

What does the Econo Mode provide?

The Econo Mode provides control over the capacity of the system. When the user enables econo mode, the system is limited by the speed of the compressor. The default value for econo mode is 65%. Under setpoints, the user can adjust the Econo Mode value between 35% and 90%.

How does the system have a time delay between the staging up of the various stages?

The system has a time delay between the staging up of the various stages:

  1. Stage 1 is initiated and starts its operation.
  2. When the PID determines that more capacity is required, stage 2 is initiated.
  3. When the system has maintained the chilled water loop and the PID has determined that no additional stage is required or has met capacity demand, it reduces the speed of the compressors.
  4. The compressors then operate at minimal speed to maintain the chilled water loop. If the speed of the compressor still exceeds the demand, the stage with the most run hours is turned off.

What operational checks are performed when the VARC is enabled?

When the VARC is enabled, the system performs pre-startup checks on all chilled water flow switches and HP switches. Individual stage faults disable only that stage.

How does the compressor startup?

The VARC utilizes a BLDC compressor that is capable of operating at a very high frequency which requires that the compressor have a ramped startup to establish proper lubrication so as to not damage the compressor. This startup has a ramp time and a minimal speed operation that will last for 100 seconds to allow the compressor to properly warm up before operating at maximum speed. The compressor minimum on time is 60 seconds and minimum off time is 10 seconds with a minimum time between starts of 60 seconds. These default parameters allow the compressor to operate in a safe mode that will not damage the compressor.

What basic VARC operations can you perform from the Chiller Enable screen?

From the Chiller Enable screen, you can perform the basic VARC operations:

  • Change setpoints
  • Select Cool, Heat, or Electric Heat
  • Monitor water temperature and pump status
  • Turn the VARC off

How do you display the Chiller Enable screen?

To display the Chiller Enable screen, from the Main screen, tap Chiller Enable.

How do I enable Remote Control for Third-Party Support?

To display the Remote Support screen, from the Main screen, tap Remote Support. To enable or disable remote support, tap the Enable Remote Support button. (Default is enabled.) In the MobileVNC Settings dialog box, on the Control tab, press Start to begin remote login and press Stop to finish. Use the settings on the Advanced tab to select configuration options for the remote login.

What parameters are displayed on the Main screen?

The Main screen displays the following parameters: Mode of operation (Econo or Normal) Chilled water return temperature Chilled water supply temperature Condenser outlet temperature

What does the condenser outlet temperature indicate?

The condenser outlet temperature is the freeze control indicator for the condensers in heat mode.

How do I view information for each stage?

The screens following the main screen contain information for each stage. The first screen displays the CW Supply and CW Return temperatures, flow switch status (Fl) and high pressure status. The next screen displays compressor speed and information to indicate if the system is in a safety count down. Once this time has elapsed and other time delays have been met, the VARC starts up. The next screen displays the suction pressure, the discharge pressure, the superheat value, and the sub-cooling value being calculated by the system. The following screens display the drive status. To access these screens, press Enter. The final screen displays an image of the refrigerant circuit and showing the valve position.

How do I adjust setpoints?

Press the Program button. Go to Setpoints, then enter the user password (1234). Press Enter once to update the Heating setpoint, by pressing the Scroll Up or Scroll Down buttons to change the value. Press Enter again to change the cooling setpoint.

How do I enable Electric Heat?

Press the Program button. Scroll down to Technician, then press enter. Scroll down to Service settings, then press Enter. Enter the service password 3156. Scroll down to System Setup, then press enter. Scroll down to Electric Heat, press Enter to select, and then press the Scroll Up or Scroll Down buttons to toggle the setting. Press Enter to save.

How do I set the Time and Date?

Press the Program button. Scroll to Clock/Scheduler, then press Enter. Press Enter. The cursor flashes on the date field: mm/dd/yyyy. Use the Scroll Up and Scroll Down buttons to select the correct month. Press Enter, then press the Scroll Up and Scroll Down buttons to select the correct day. Press Enter, then use the Scroll Up and Scroll Down buttons to select the year. Press Enter. The cursor drops down to the Hour field. Use the Scroll Up and Scroll Down buttons to select the correct hour, then select the minute. The cursor goes back to the Clock title. Settings have been saved and you can exit to Main screen. Daylight Savings Time is enabled by default. If you wish to disable, scroll down from the Clock screen.

How do I change the Temperature Display Units?

Press the Program button. Go to Setpoints, then enter the password (3156). Scroll down to the Temperature Units screen. Press Enter to select. Use the Scroll Up and Scroll Down buttons to toggle between options. After selecting the desired option, press Enter to return the cursor to the top of the screen. Make this change to all stages so that it correctly reflects temperature readings on the remote display.

How do I view Alarms for Each Stage?

The Main screen indicates alarms by flashing the word Alarm in the lower-right corner. The Alarm screen captures a snapshot of the system parameters at the time of the fault. The alarm history captures and displays the following parameters: Compressor speed Chilled water return Chilled water supply Discharge pressure Suction pressure To view the alarm information for more than one stage, you need to switch boards via the display or look at the PLDPRO display for that stage. Use the alarm logger to view the alarm history. To clear an alarm when a fault has been corrected, press and hold the Alarm button for five seconds to clear the active alarm.

How do I access Maintenance Mode from the LCD Screen?

In the Main screen, press Enter and scroll up or down to select OFF, then press Enter to save. To access the Maintenance mode menu, press Program, scroll to Technician, and then press Enter. Scroll to service settings, then press Enter. Enter the service password: 3156. Scroll to Stage Disable, then press Enter. For Stage Control, change No to Yes, press Enter, scroll up, and then press Enter. The screen displays the stages. Press Enter to access each stage, then scroll up or down to change from Auto to Disabled.

How do I access Maintenance Mode from the Touch Screen?

Tap the touch screen to view the menu buttons, then tap Chiller Summary. The system must be in off mode to access maintenance mode. Tap the wrench icon. From the Chiller Control menu, select YES to enable Maintenance mode. To disable a stage, tap the menu to the right of the stage number and select Disabled. Tap X to exit, then turn on the VARC.

What should I do in the event of a fault?

In the event of a fault, the system does not generate an alarm immediately, but instead applies an alarm retry logic scheme. The system shuts down and attempts the number of retries that is set on the parameters table before creating an alarm that needs to be reset manually.

What are the corrective actions for Power+ n˚1 Alarms?

Check the load. Check the network control devices and cables. Check the input voltage. Using a 1000 V megohmmeter, check the motor and motor cables for ground faults. Check the input and output circuits for phase loss detection. Check the condition of the motor and load wiring.

What are the corrective actions for a Chilled Water Flow alarm?

Check for proper loop water flow and make sure the strainers are not clogged. Check for a defective flow switch. Bleed air out of the loop water. Check the loop water pump.

What are the corrective actions for a Chilled Water Return Sensor Failure alarm?

Check the sensor for shorts and opens. Compare the temperature reading with the digital thermometer.

What are the corrective actions for a Chilled Water Supply High alarm?

Check for low water flow due to restrictions or pump wear.

What are the corrective actions for a Chilled Water Supply Low alarm?

Check for low water flow due to restrictions or pump wear.

What are the corrective actions for a Chilled Water Supply Sensor Failure alarm?

Check the sensor for shorts and opens. Compare the temperature reading with the digital thermometer.

What are the corrective actions for a Compressor Start Failure alarm?

Compare the voltage to the compressor. Check the power inverter.

What are the corrective actions for a Condenser Out Temperature Sensor Failure alarm?

Check the sensor for shorts and opens. Compare the temperature reading with the digital thermometer.

What are the corrective actions for an EVD Evo Low Evaporation Temperature (LOP) alarm?

Check the water flows. Check the refrigerant charge.

What are the corrective actions for an EVD EVO Low Superheat alarm?

Check for proper refrigerant charge as the system may be overcharged. Check the water for low flow. Check the EEV movement and functionality.

What are the corrective actions for an EVD Evo Probes fault or disconnected (S1, S2, S3, S4) alarm?

Check the condition of the wiring and connections.

What are the corrective actions for a Frost Active alarm?

Low temperature temp switch tripped. Check the water flows. Check the refrigerant charge.

What are the corrective actions for a High Discharge Pressure alarm?

Check for the proper refrigerant pressure with the gauge. If normal, check for a defective pressure switch. Check that there is proper sea water and loop water flow. Check that water strainers are not clogged. Check that the system is not overcharged.

What should I do if the Inverter Model is Not Compatible?

Make sure Power+ is being used.

What are the corrective actions for a Low Pressure Differential alarm?

Check the EEV motor. Use a gauge to check for proper the refrigerant pressure. Check suction the temperature to verify that the reversing valve is in proper position.

What are the corrective actions for a Low Suction Pressure alarm?

Use a gauge to check for the proper refrigerant pressure. If normal, check for a defective pressure switch. Check for the proper sea water and loop water flow. Check that the water strainers are not clogged. Check that the system is not undercharged.

What are the corrective actions for a Sea Water Inlet Sensor Failure alarm?

Check the sensor for shorts and opens Compare the temperature reading with the digital thermometer.

What are the descriptions of the Envelope Zone Statuses?

Zone 1: Inside envelope zone Working point inside limits Zone 2: High compression ratio Low gas density -> maximum discharge temperature Zone 3: High condensing pressure Mechanical limit Zone 4: Maximum motor current High gas density-> maximum torque Zone 5: High evaporating pressure High gas density-> mechanical limit, noise Zone 6: Low compression ratio Loss of contact between spirals, vibrations Zone 7: Low pressure difference Loss of lubrication Zone 8: Low condensing pressure Low oil temperature -> high viscosity -> poor lubrication Zone 9: Low evaporating pressure Low gas density -> low motor cooling

How should I dispose of the product?

Place the packaging material in the appropriate recycling waste bins, whenever possible. Consult a local recycling center or specialist dealer for details about how to dispose of the product in accordance with all applicable national and local regulations.

CLICK HERE TO DOWNLOAD DOMETIC MARINE VARCX60 (01) PDF MANUAL

Visitors also searched:

  1. DOMETIC ORIGO 6100 (01) PDF MANUAL
  2. DOMETIC MARINE VARCX72 (01) PDF MANUAL
  3. DOMETIC SCE320B (01) PDF MANUAL
  4. DOMETIC AIR BREAK ALL-SEASON 3 DOOR (01) PDF MANUAL
  5. DOMETIC MARINE VARCX48 (01) PDF MANUAL
  6. DOMETIC MARINE VARCX120 (01) PDF MANUAL
  7. DOMETIC CRE CRE0080 (01) PDF MANUAL
  8. DOMETIC SCE360 (01) PDF MANUAL
  9. DOMETIC 459146.71X (01) PDF MANUAL
  10. CADAC DOMETIC CITI CHEF 5610 (01) PDF MANUAL

Leave comments, questions, reviews, tips, tricks, hacks or page errors below. Account not required.