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Mueller E-Star OESE-A351-HFC User Manual

Mueller E-Star OESE-A351-HFC
48 pages
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Part No. 8828747
Effective April 13, 2020
E-Star® OESE
Condensing Unit
3.5 and 5 HP HFC
INSTALLATION AND OPERATION MANUAL

Table of Contents

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Mueller E-Star OESE-A351-HFC Specifications

General IconGeneral
HSPF9
Voltage (V)208-230
Phase1
Coefficient of Performance (COP)3.5
RefrigerantR-410A

Summary

Introduction

General Specifications

Details the custom and specialized components of the E-Star OESE condensing units for milk cooling systems.

Dimensions and Weight Table

Presents the physical dimensions and weight specifications for the condensing units.

Dimensions and Weight Figure

Visual representation of the condensing unit's dimensions and weight.

Technical Support

Provides contact information for obtaining technical assistance and manufacturer support.

Installation Information

Outlines requirements for qualified technicians and adherence to regulations for installation and service.

Installation

Inspection

Instructions for checking shipments for shortages or concealed damage upon delivery.

Handling Equipment

Important safety note regarding lifting equipment and ensuring it is rated for the unit's weight.

Location Considerations

Considerations for choosing an optimal location for the condensing unit, including environment and airflow.

Refrigeration Piping and Evacuation

Procedures for purging lines with dry nitrogen, insulating lines, and performing system evacuation.

Refrigerant Line Sizing Tables

Guidance on selecting appropriate pipe sizes for liquid, suction, and discharge lines based on conditions.

Condensing Unit Connection Sizes

Specifications for condensing unit connection sizes for liquid, suction, and discharge lines.

Electrical Connections

Instructions for verifying compatibility and securing electrical connections according to codes and schematics.

24-VAC Control Circuit Hazard Warning

Critical warning about connecting high-voltage control to the 24-VAC circuit, which can cause failure and hazards.

Pump-Down Installations

Information on optional hard start kits and required discharge check valves for pump-down installations.

Refrigerant Charging

EPA Refrigerant Regulations

Details EPA regulations requiring Type II certification for refrigerant installation and service.

Initial Refrigerant Charge Procedure

Procedure for triple evacuation and initial refrigerant charging, emphasizing weigh-in method.

Critical Evacuation Requirement

Crucial instruction on the necessity of triple evacuation to 500 microns before charging refrigerant.

Startup vs. Final Charge

Note that startup charge is initial; final charge may differ and is detailed in Section 3.3.

Recommended Startup Refrigerant Charge

Table listing recommended startup refrigerant charge amounts for milk cooler and chiller applications.

Weigh-In Refrigerant Charging Procedure

Step-by-step procedure for weighing in the refrigerant startup charge, including connections and purging.

Critical Liquid Charging Safety

Critical safety warning about charging liquid refrigerant upstream of the accumulator to prevent compressor damage.

Final Operating Charge Adjustment

Procedure for fine-tuning the refrigerant charge for optimal system efficiency, including superheat checks.

Refrigerant Testing Protocol

Procedure for testing refrigerant for acid contamination after compressor failure and subsequent steps.

Refrigerant Handling Safety Alert

Safety warning for technicians, emphasizing protective gear and hazards of liquid refrigerant contact and decomposition.

Operating Features

Refrigerant Cycle Explanation

Explanation of how the TEV controls superheat and the refrigerant flow through the subcooling coil and accumulator.

Oil Return Mechanism

Description of how refrigerant oil returns from the evaporator to the compressor via the accumulator.

Increased Operating Efficiency

Explanation of how the receiver and condenser subcooling loop enhance evaporator efficiency.

Refrigerant Piping Schematic

Diagram illustrating the refrigerant piping system, including components and flow.

Expansion Valve

TEV Selection and Installation

Guidelines for selecting and installing the TEV to maintain specified evaporator superheat levels.

TEV Selection Table

Table detailing part numbers for TEV selection based on refrigerant and application (milk cooler/chiller).

TEV Installation Diagram

Diagram illustrating the correct mounting and placement of the TEV sensing bulb.

Checking and Adjusting Superheat

Step-by-step instructions for measuring and adjusting evaporator superheat using the TEV.

Critical Suction Pressure Measurement

Critical instruction on where to measure suction pressure for accurate superheat readings.

Superheat Adjustment Diagram

Diagram demonstrating how to check and adjust superheat, including pressure and temperature points.

Accumulator Heat Exchanger

Accumulator Heat Exchanger Functions

Explanation of the functions of the accumulator heat exchanger, including subcooling, vapor return, and oil return.

Genuine Accumulator Requirement

Critical warning about using only genuine Mueller accumulator heat exchangers to avoid capacity loss and compressor failure.

Accumulator Heat Exchanger Diagram

Diagram showing the internal components and flow paths of the accumulator heat exchanger.

Electrical Schematics

5 HP, 460/60/3 Wiring Schematic (Post Sep 2007)

Wiring schematic for a 5 HP unit, 460/60/3, for systems after September 1, 2007.

5 HP, 460/60/3 Wiring Schematic (Pre Aug 2007)

Wiring schematic for a 5 HP unit, 460/60/3, for systems until August 31, 2007.

3.5 & 5 HP, 200-220/50/1, 208-230/60/1 Wiring Schematic

Wiring schematic for 3.5 and 5 HP units, 200-220/50/1 and 208-230/60/1.

3.5 & 5 HP, 200-240/50/3, 208-230/60/3 Wiring Schematic

Wiring schematic for 3.5 and 5 HP units, 200-240/50/3 and 208-230/60/3.

Low-Voltage, 24-VAC Control Circuit

Wiring schematic for the low-voltage, 24-VAC control circuit.

Control Circuit Retrofit (24-VAC to 240-VAC)

Instructions for retrofitting the control circuit from 24-VAC to 240-VAC for older control boxes.

Pressure Switches and Fan Control

Low-Pressure Switch Testing

Procedure for testing the low-pressure switch during installation to ensure proper operation.

Glycol Temperature Warning

Important warning for chiller applications regarding glycol solution temperature to prevent freezing damage.

High-Pressure Switch Testing

Procedure for testing the high-pressure switch during installation to ensure proper operation.

RGE Electronic Fan Speed Control

Explanation of the RGE electronic fan speed control and its modes for variable fan operation.

RGE Fan Pressure Control Adjustment

Instructions for verifying and adjusting the RGE fan control setpoints for optimal fan operation based on pressure.

RGE Fan Control Diagram

Diagram showing the RGE electronic fan pressure control and adjustment points.

Off-Cycle Fan Pressure Switch

Description of the off-cycle fan pressure switch function for protection during wash cycles.

Schrader Core Identification

Information on identifying pressure switches with Schrader cores and the implication for refrigerant recovery.

Equipment Sound Level

Sound Testing Equipment

Details the sound testing equipment and scale used for measurements.

Sound Measurement Results

Reports the sound measurements taken at a specific distance from the operating equipment.

Sound Measurement Diagram

Visual representation of sound measurement levels at different points around the equipment.

Maintenance

Refrigeration Survey Form

Provides a template for recording refrigerant survey data, including pressure and temperature readings.

Maintenance Procedures

Recommended annual maintenance procedures for the condensing unit, including cleaning and checks.

General Maintenance Safety Alert

General safety alert for all maintenance and service, emphasizing trained personnel.

Automatic Start-Up and Guard Warning

Critical warnings about automatic equipment start-up and the necessity of guards for hazard prevention.

Disposal

General Disposal Guidelines

General guidelines for handling and disposing of materials, refrigerant, and oils according to regulations.

Compressor Refrigerant Oil Disposal

Information on the compressor lubricant (POE) and disposal requirements.

Metal Components Recycling

Details the metal components of the condensing unit that may be separated and recycled.

Equipment Markings and Labels

Key Operational Labels

Labels for Nitrogen charge, Refrigerant type, Data Tag, and Inspection Card.

Wiring and Operation Labels

Labels covering three-phase wiring, power interruptions, CE tag, and screen location.

Safety Warning Labels

Labels for hot surfaces, electrical hazards, screen guard removal, and electric shock risk.

Critical Safety Warnings

Warnings for disconnecting power, placing guards, and automatic fan start.

Manufacturer and Certification Logos

Includes the Mueller logo and CSA certification mark.

Safety

General Safety Alert and Reference

General safety alert for improper handling or service and reference to Section 12 labels.

Refrigerant Health Hazards

Information on the health hazards associated with HFC refrigerants, including decomposition products and frostbite.

First Aid Procedures

First aid procedures for exposure to refrigerant vapors, skin contact, and eye contact.

Personal Protective Equipment (PPE)

Recommendations for personal protective equipment (PPE) for technicians handling refrigerants.

Technical Data

Electrical Data

Table providing electrical specifications for various E-Star OESE models, including voltage, phase, and load.

Refrigerant Data

Table listing part numbers for receiver, expansion valve, accumulator, and drier for E-Star OESE units.

Compressor Oil Charge

Table detailing the oil charge and oil type for E-Star OESE compressors.

Compressor Data Charts

ZB26KCE Single-Phase Data

Compressor performance data chart for ZB26KCE single-phase units at various operating conditions.

ZB26KCE Three-Phase Data (208/230V)

Compressor performance data chart for ZB26KCE three-phase units at various operating conditions.

ZB38KCE Single-Phase Data (208/230V)

Compressor performance data chart for ZB38KCE single-phase units at various operating conditions.

ZB38KCE Three-Phase Data (208/230V)

Compressor performance data chart for ZB38KCE three-phase units at various operating conditions.

ZB38KCE Three-Phase Data (460V)

Compressor performance data chart for ZB38KCE three-phase units at 460V.

E-Star OESE Installation Survey

Installation Survey Data Recording

Instructions and template for technicians to record survey data, including measurements and serial numbers.

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