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Unitrol 8000 - User Manual

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PROCESS WATER CHILLER
MODEL #8000, #8012
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Summary

Process Water Chiller Models 8000 & 8012

Product Identification

Identifies the document as relating to Unitrol Process Water Chillers, Models #8000 and #8012.

Unitrol Warranty Information

Parts Warranty Coverage

Unitrol warrants chiller parts free of defects for one year from factory shipment.

Labor Warranty Coverage

Covers warranty labor for 90 days from factory shipment, subject to conditions.

Warranty Claim Procedure

Steps to follow for warranty coverage, including contacting service department.

Product Overview and Specifications

Model and Technical Details

Details on model number, capacity, serial number, date, refrigerant, and service requirements.

Chiller Installation Guide

Unpacking and Inspection

Carefully remove chiller from carton and inspect for external damage before proceeding.

Chiller Placement Guidelines

Maintain 36" clearance for air intake/exhaust to ensure proper condenser coil airflow.

Water Tank Preparation for Startup

Prepare water tank by removing cover and untying water level switch float.

Connecting Water Lines

Install 1/4" NPT fittings and connect hoses to the welder using Teflon tape.

Filling Water Tank

Fill the stainless steel tank with tap water to approximately 1 inch below the top.

Electrical Connection and Grounding

Connect power cord to a 20A 115V grounded outlet; do not bypass ground pin.

Initial Startup Procedure

Water Supply for Startup

Ensure a water source is available to maintain tank level during initial operation.

Activating the Chiller

Turn control switch ON and monitor water pump and level to prevent dry operation.

Pump Protection Warning

Critical warning against operating the pump without sufficient water to prevent damage.

Temperature Controller Setup

Accessing Set Value (SV)

Press the SEL button to display the Set Value (SV) on the temperature controller.

Adjusting Operating Temperature

Use UP/DOWN buttons to set desired turn-on temperature; minimum factory set at 55°F.

Confirming Temperature Setting

Press and release SEL button to lock in the new temperature setting.

Displaying Current Temperature

Simultaneously push and release buttons to briefly show 00, then the current tank temperature.

Temperature Controller Operation

Compressor Start Conditions

Compressor activates when tank temp is 3°F above SV; OUT indicator lights up.

Compressor Stop Conditions

Compressor deactivates when tank temp reaches SV; OUT indicator turns off.

Installation Support Contact

Contact Unitrol service for installation issues, providing model and serial numbers.

Troubleshooting Faults

Common Fault Indicators

Faults trigger an alarm, stop the water pump, and stop the refrigeration system.

Low Water Level Switch Function

Monitors water level, floating upward when above minimum, downward when below.

Importance of Low Water Protection

Protects pump and compressor from damage caused by the pump running dry.

Low Freon Fault Diagnosis

Low Freon pressure indicates a potential leak; requires a certified technician.

High Freon Fault Causes

High Freon pressure can result from dirty air intake filters or condenser coils.

Impact of Dirty Air Filter

Restricted airflow from dirty filter reduces heat removal, increasing Freon temperature.

Impact of Dirty Condenser Coils

Dirt on coil fins impedes heat transfer, leading to elevated Freon temperatures.

Airflow Restriction Due to Placement

Insufficient clearance (<36") restricts airflow, causing overheating and faults.

High Ambient Temperature Operation

During extreme heat (>95°F), remove air filter to prevent overheating; replace when cooler.

Improving Condenser Airflow

Consider auxiliary fans or kits for extreme heat or restricted air flow conditions.

Electrical Schematic and Components

Schematic Diagram Legend

Defines abbreviations for components like compressor, relays, pump, and temperature controller.

Wire Gauge and Color Coding

Specifies wire sizes (GA) and colors used in the electrical connections.

Safety Grounding Requirement

Emphasizes connecting the ground pin on the power cord for safe operation.

Routine Maintenance Procedures

Refrigeration Service Restriction

Only certified refrigeration technicians should service the sealed refrigeration section.

Condenser Coil Cleaning Guide

Inspect and clean evaporator coil fins every 3 months using water or solvent.

Water Tank Cleaning Schedule

Remove cover and clean water tank every 6 months to remove material buildup.

Water Pump Maintenance

Water pump bearings are sealed and require no periodic oiling or greasing.

Component Identification and Maintenance Log

Direction Book Reference

Identifies "8000-50" as the reference for the direction book.

Water System Components

Lists part numbers and descriptions for water pump, motor, coupler, and pressure valve.

Electrical System Components

Lists part numbers and descriptions for controller, relays, switches, fault signal, and filter.

Refrigeration Parts Sales Policy

Unitrol sells refrigeration components exclusively to certified refrigeration technicians.

Compressor and Condenser Parts

Lists part numbers for compressors and complete condenser assemblies for models 8000/8012.

Evaporator and Expansion Valve Parts

Lists part numbers for evaporator plates and expansion valves for models 8000/8012.

Refrigeration Filter;Drier and Sight Glass

Lists part numbers for liquid line filter/driers and refrigeration sight glass.

Maintenance Log Sheet

Maintenance Activity Log

A template table to record dates, identified problems, and resolutions for maintenance activities.

Unitrol 8000 Specifications

General IconGeneral
BrandUnitrol
Model8000
CategoryChiller
LanguageEnglish