Dometic VARC 48 - User Manual

VARC Chiller Control
Operations Manual
Dometic Group Marine Division
Rev. 20170511
L-3499 English
P/N 338208
COPYRIGHT © 2011-2017 Dometic Group Marine Division. All Rights Reserved.
No part of this publication may be reproduced, translated, stored in a retrieval 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 in the preparation of this manual to insure its accuracy. However, Dometic Corporation assumes no
responsibility for errors and omission. Neither is any liability assumed for damages resulting from the use of this product and
information contained herein.

Summary

PGD1 and PLDPRO Navigation

Alarm Button

Touchscreen Navigation

Chiller Enable

Chiller Summary

Chiller Stage

Alarms

Accesses active alarms, alarm history, and troubleshooting information.

Remote Support

System Overview

MODBUS

Startup

Explains how the VARC Chiller controller operates in single or multistage configurations.

Compressor Startup

Describes the ramped startup procedure for the BLDC compressor to prevent damage.

Setpoints

Cooling

Heating

Compressor Staging Time

Operational Modes

Cooling Mode

Explains system operation, compressor control, and staging in cooling mode.

Heating Mode

Explains system operation, compressor control, and staging in heating modes.

PUMP OPERATION

Main Menu Navigation Tree

Menu B: Setpoints

Allows adjustment of heating/cooling setpoints and current limiting modes.

Menu D: Input;Output

Menu E: Alarm History

Captures and displays system parameters at the time of the alarm.

Menu G: Technician

Service and Configuration Settings

Sub Menu B: Probe Adjustment

Sub Menu C: Control Loops

Allows setting superheat setpoint and other PID parameters for valves and drives.

Sub Menu E: Stage Address

Sub Menu: F Stage Disable

Allows disabling a stage off-line for repairs while the system remains operational.

Electrical Specifications

Installation Requirements

Appendix I: Touchscreen Navigation

MAIN PAGE

Displays the main screen with navigation icons for system control.

CHILLER Enable

Chiller Stage

Active Alarms

Alarm History

Shows how to access and view past alarm events and data.

Alarm Help

Appendix IV Configuration & Setup

Setting Time and Date

Step-by-step guide to setting the system's time and date.

Enabling Electric Heat

Steps to enable the Electric Heat functionality through system settings.

Select Unit of Temperature

Instructions to select and change temperature units (Fahrenheit/Celsius).

HMI Setup

Uploading program

Step-by-step guide for uploading the correct program onto the touchscreen.

Deleting old program:

Steps to delete old programs using the Project Manager.

Activating Maintenance Mode

Enabling via PGD1 Display

Steps to enable maintenance mode using the PGD1 display.

Enabling via Touchscreen

Steps to enable maintenance mode using the touchscreen interface.

Appendix V Alarm Table

Water Supply and Return Alarms

Water Flow and Pressure Alarms

Details alarms for chilled water flow, discharge pressure, and suction pressure.

Compressor and System Component Alarms

Power+ System Alarms

Details alarms related to the Power+ system components and faults.

Appendix VI Default Parameters

Cooling and Heating Setpoints

Operational Modes and Settings

Alarm Setup Defaults

Default settings for various alarm conditions and parameters.

Appendix VII I;O Table & Wiring Diagram

Analog Inputs

Table listing Analog Inputs (AI) and their corresponding Board I/O and description.

Digital Inputs

Analog Outputs

Digital Outputs

VARC Standard Wiring Diagram

Figure

Dometic VARC 48 Specifications

General

Brand	Dometic
Model	VARC 48
Category	Chiller
Language	English