PolyScience DA500

Questions and Answers:

H
Heather BrooksAug 2, 2025
Why is my PolyScience DA500 Chiller not cooling properly?
- A
  abooneAug 2, 2025
  If your PolyScience Chiller isn't cooling sufficiently, several factors could be at play. First, ensure the air filter or condenser isn't coated in dust; clean them if needed. Next, check for and remove any blockages from the air ventilation screens. Also, verify that the facility water isn't too warm and correct it if necessary. Make sure the heat load doesn't exceed the chiller's capacity. High ambient air temperature can also be a culprit, so try to decrease it. Finally, low or high line voltage can impact cooling, so check and correct as required.
T
Tiffany MaldonadoAug 8, 2025
What to do if there is no fluid circulation in my PolyScience Chiller?
- G
  Gregory BakerAug 9, 2025
  If your PolyScience Chiller is not circulating fluid, first check the fluid reservoir and add more fluid if it's insufficient. Second, inspect the circulating system for any blockages and remove them. Lastly, verify that the pump is operating; if not, it may need replacement.
S
Sarah PadillaAug 14, 2025
How to troubleshoot a PolyScience Chiller that does not run and has blank digital displays?
- T
  Troy HigginsAug 14, 2025
  If your PolyScience Chiller is not running and the digital displays are blank, start by checking that the electrical wiring is securely connected to an operating electrical source. Ensure the Power Switch / Disconnect is in the ON position. Also, check the phase monitor indicator light for correct phase wiring.
R
Randy MillerAug 20, 2025
Why is there insufficient circulation in my PolyScience Chiller?
- J
  James DelgadoAug 21, 2025
  If you are experiencing insufficient circulation with your PolyScience Chiller, the fluid's viscosity might be too high; consider replacing it with a lower viscosity fluid. Also, the external tubing diameter could be too small; replace it with larger diameter tubing. Check for any restrictions in the fluid lines and correct them as necessary. Finally, low or high line voltage can cause this issue, so check and correct as required.
K
katelyn84Aug 27, 2025
What to do if my PolyScience DA500 doesn't run and shows decimal points on the display?
- L
  Luis ThompsonAug 27, 2025
  If your PolyScience Chiller unit does not run and three decimal points appear on the Temperature Display and two decimal points appear on the Pressure/Flow Rate Display, it is likely in Standby mode. Press the Power Button on the front panel to exit Standby mode.

PolyScience DA500 Specifications

General

Brand	PolyScience
Model	DA500
Category	Chiller
Language	English

Summary

Introduction and Features

Introduction

Overview of DuraChill Chillers as cooling solutions for demanding applications.

Standard and Optional Features

Highlights key standard and optional features for enhanced chiller performance.

Safety and Compliance Information

General Safety Information

Explains safety symbols and general precautions for chiller operation and maintenance.

Safety Recommendations

Provides critical warnings and safety precautions for chiller installation and operation.

Regulatory Compliance and Testing

Lists compliance standards and testing requirements for chiller certifications.

Unpacking Instructions

Guidance on unpacking the chiller and initial inspection procedures.

Chiller Controls and Components

Control System Overview

Details the chiller's control system, including the control panel and its functions.

Fluid Circulation System

Describes the sub-system responsible for fluid flow through the chiller's components.

Cooling System Components

Explains the common components that make up the chiller's cooling system.

Air-Cooled and Water-Cooled Specifics

Identifies components unique to air-cooled (DA) and water-cooled (DW) chiller models.

Component Identification

Front Panel Component Identification

Identifies key components located on the front panel of all chiller models.

Rear Panel Component Identification

Identifies components on the rear panel for 5, 7.5, and 10 HP chiller models.

Installation and Startup Procedures

Site Requirements for Installation

Specifies environmental conditions like temperature and humidity for chiller installation.

Chiller Location Guidelines

Provides recommendations for selecting an appropriate location for the chiller unit.

Required Installation Clearances

Details the necessary space around the chiller for access and ventilation.

Electrical Power Connections

Electrical Power Requirements

Outlines voltage, frequency, and phase requirements for chiller power connection.

Signal Inputs and Outputs

Remote OnOff and Alarm Signals

Explains remote control inputs and alarm output contacts for monitoring.

RS-232 Serial Communication

Details serial communication capabilities for remote control and data access.

External Piping and Connections

General Considerations for Piping

Guidance on selecting and installing external tubing and connections for safety and performance.

Process Fluid and Facility Connections

Details process fluid connections, facility water hookups, and reservoir management.

Full Flow Bypass Operation

Full Flow Bypass Functionality

Explains the purpose and function of the full flow bypass valve in the chiller system.

Adjusting Bypass Pressure

Provides step-by-step instructions for adjusting the full flow bypass pressure setting.

Process Coolant Guidelines

Suitable Process Fluids

Lists recommended and prohibited fluids for the chiller's coolant system.

Chiller Startup Procedures

Initial Startup and Warm-up

Instructions for the initial startup and necessary warm-up period for the chiller.

Starting Process Fluid Flow

Details the steps to initiate fluid circulation through the chiller system.

Normal Chiller Operation

Powering On the Chiller

Instructions for powering on the chiller and initiating the startup sequence.

Temperature Unit and Default Reset

How to change temperature units (°C/°F) and perform a factory default reset.

Adjusting Set Point Temperature

Guide to setting the desired operating temperature for the chiller.

Selecting Display Units and Probes

How to select display units and view internal/external probe temperatures.

Operational Parameter Settings

High and Low Temperature Limits

Sets maximum/minimum allowable temperatures and triggers alarms.

Ambient Temperature and Pressure Limits

Sets limits for ambient temperature and maximum fluid pressure.

Flow Rate and Band Settings

Configures minimum flow rate, lower band, and upper band for compressor control.

Calibration and Control Settings

Adjusts calibration offset, compressor delay, and current control settings.

Advanced Operational Settings

Compressor Delay and Flow Calibration

Adjusts compressor delay time and calibrates the flow rate display.

Coolant Properties Display

Displays factory-set coolant density and specific heat values.

Current Control Configuration

Enables or disables set point adjustment via a 4-20 mA analog signal.

Communications and Ambient Limits

Sets baud rate for communication and the low ambient temperature limit.

Local Lockout Feature

EnablingDisabling Local Lockout

Prevents unauthorized changes to set points and operational parameters.

Display, Alarm, and Error Messages

Alarm and Error Code Reference

Lists alarm/error codes, their descriptions, and required actions for resolution.

Automatic Restart from Alarm Mode

Details the chiller's automatic restart feature after alarm conditions occur.

Routine Maintenance Procedures

Maintenance Schedule and Coolant Checks

Schedule for maintenance tasks, coolant level, and freeze protection checks.

Inline Strainer Cleaning

Procedures for inspecting and cleaning the inline strainer to maintain flow.

Air Filter Inspection and Cleaning

Instructions for removing, cleaning, and reinstalling the chiller's air filters.

Troubleshooting Common Issues

Troubleshooting Chart

A guide to diagnosing and resolving common chiller operational problems.

Compressor Overload Fault (Ft 20)

Details the compressor overload fault and manual reset procedure.

Pressure Sensor Faults

Troubleshooting for low and high refrigerant pressure sensor issues.

Technical Specifications

Chiller Model Specifications

Provides detailed performance and dimensional data for chiller models.

Electrical Specifications by Model

Lists electrical data, including current and fuse/breaker sizes for various models.

Pump Performance Data

Pump Performance Curves

Presents performance curves and identification for various pump types.

Serial Communication Protocol

RS-232 RS-485 Communication

Details serial communication protocols, commands, and pinouts.

Disposal and Support Information

Equipment Disposal (WEEE Directive)

Guidelines for proper disposal of the chiller according to WEEE regulations.

Service and Technical Support

Information required when contacting support for service or troubleshooting assistance.

Chiller Fluids and Warranty

PolyScience Chiller Fluids

Lists available circulating bath fluids and their corresponding part numbers.

Manufacturers Warranty

Details the warranty period, terms, and conditions for the chiller.

Appendix Schematics and Diagrams

Flow Schematic - Air-Cooled Chillers

Diagram illustrating the refrigerant flow path in air-cooled chiller models.

Flow Schematic - Water-Cooled Chillers

Diagram illustrating the refrigerant flow path in water-cooled chiller models.

Wiring Diagrams

Electrical wiring diagrams for 5, 7.5, and 10 HP air-cooled and 5 HP water-cooled chillers.

Advanced Control Feature

4-20 mA Set Point Control

Details the use of a 4-20 mA analog signal for controlling the chiller's set point.

Related product manuals

PolyScience Chiller

43 pages

Refrigerated Recirculating Chillers

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PolyScience LS Series

22 pages

Table of Contents