McQuay MDB075D User Manual

MDB - D - 2004
Ducted Blower Split Systems
Models: MDB 075 - 500D
 MDB 075 - 500DR
MDB 125/150 D/DR
MDB 200 - 500 D/DR
MMC 075 - 150 D/DR

McQuay MDB075D Specifications

General

Brand	McQuay
Model	MDB075D
Category	Air Conditioner
Language	English

Summary

Nomenclature System

Nomenclature System Breakdown

Explains the model naming convention.

Features

Easy Maintenance

Describes ease of access for servicing and maintenance.

Air Discharge Orientation

Details standard and convertible air discharge options.

Compact Indoor Unit

Highlights the compact design for space saving.

Flexibility Of Air Supply

Describes adjustable air volume and static via belt-driven blowers.

Copeland Scroll Compressor

Mentions Copeland Scroll compressors for efficiency and quiet operation.

Thermal Expansion Valve (TXV) Control

Explains TXV usage for refrigerant control.

General Specifications

Unit Structure

Describes casing material, thickness, and finishing.

Coil Specifications

Details coil construction with copper tubes and aluminum fins.

Blower, Fan And Motor Details

Describes indoor blower and outdoor propeller fan construction.

Compressor Features

Highlights Scroll compressor features like overload protection.

Safety Controls Overview

Lists safety features like pressure cut-outs and phase protectors.

Specifications Tables

Cooling only 50Hz (R22) Specifications

Provides detailed specifications for cooling-only units.

Heatpump 50Hz (R22) Specifications

Provides detailed specifications for heatpump units.

Cooling only 50Hz (R407C) Specifications

Details specifications for R407C cooling-only units.

Heatpump 50Hz (R407C) Specifications

Details specifications for R407C heatpump units.

Cooling only 220V – 60Hz (R22) Specifications

Specifies cooling-only units for 220V/60Hz.

Cooling only 460V – 60Hz (R22) Specifications

Specifies cooling-only units for 460V/60Hz.

Very High Static Cooling/Heatpump Specifications

Details high static cooling and heatpump units.

Performance Tables

R22 50Hz Cooling Capacity Tables

Presents cooling capacity data for R22 units.

R407C 50Hz Cooling Capacity Tables

Presents cooling capacity data for R407C units.

R22 50Hz Heating Capacity Tables

Presents heating capacity data for R22 units.

R407C 50Hz Heating Capacity Tables

Presents heating capacity data for R407C units.

Sound Power Level

MDB – D/DR Series Sound Power Level

Provides sound power data for MDB D/DR series units.

Operating Range

Cooling Operation Range

Illustrates allowable operating temperatures for cooling.

Heat Pump Operation Range

Illustrates allowable operating temperatures for heat pump.

Drive Package Selection Example

Example Calculation for MDB250D2

Step-by-step example for selecting drive package components.

Motor and Blower Specifications Summary

Summarizes motor and blower design data for 50Hz and 60Hz models.

Blower Performance Curves

MDB 075D-500D Blower Curves

Shows performance curves for MDB 075D through 500D blowers.

MDB 075D/DR VERY HIGH STATIC Blower Curve

Shows performance curves for high static models.

Outlines And Dimensions (Indoor)

MDB 075D/DR and MDB 100D/DR Dimensions

Provides outline and dimension drawings for MDB 075/100D/DR.

MDB 125D Series Indoor Dimensions

Provides outline and dimension drawings for MDB 125D series indoor units.

MDB 150D Series Indoor Dimensions

Provides outline and dimension drawings for MDB 150D series indoor units.

MDB 200D2/DR2 & 250D2/DR2 Indoor Dimensions

Provides outline and dimension drawings for MDB 200/250D2/DR2 units.

MDB 300D2/DR2 & 400D4/DR4 Indoor Dimensions

Provides outline and dimension drawings for MDB 300/400D units.

MDB 500D4/DR4 Indoor Dimensions

Provides outline and dimension drawings for MDB 500D4/DR4 units.

Outlines And Dimensions (Outdoor)

MMC 075/100D/DR & MDB 125D/DR Outdoor Dimensions

Provides outline and dimension drawings for MMC/MDB outdoor units.

MMC 150D/DR Outdoor Unit Dimensions

Provides outline and dimension drawings for MMC 150D/DR outdoor units.

MMC 100D & MMC 125D Outdoor Unit Dimensions

Provides outline and dimension drawings for MMC 100D/125D outdoor units.

MMC 150D Outdoor Unit Dimensions

Provides outline and dimension drawings for MMC 150D outdoor units.

Wiring Diagrams (Cooling)

MDB/MMC Models with U1.4/SLM3 Handset

Wiring diagrams for MDB/MMC units with specific controllers.

MDB/MMC Models with U1-125 Mainboard

Wiring diagrams for MDB/MMC units with U1-125 mainboard.

MDB/MMC Models with Sequential Controller

Wiring diagrams for MDB/MMC units with sequential controllers.

Wiring Diagrams (Heatpump)

MDB/MMC DR Models with U1.4/SLM3 Handset

Heatpump wiring diagrams for specific models and controllers.

MDB/MMC DR Models with U1-125 SLM3 Handset

Heatpump wiring diagrams for specific models and controllers.

MDB DR2/DR4 Models with Sequential Controller

Heatpump wiring diagrams for DR2/DR4 models with sequential controller.

Refrigerant Circuit Diagram

MMC 075D/100D/125D/150D Diagram

Illustrates the refrigerant circuit for MMC units.

MLC 061C Diagram

Illustrates the refrigerant circuit for MLC 061C.

MMC DR Models Refrigerant Diagram

Illustrates refrigerant circuit for MMC DR models.

Installation (Indoor)

Preliminary Site Survey

Guidelines for electrical supply, voltage, and location.

Mounting Guidelines

Instructions for ceiling-mounted unit placement and support.

Piping Requirements

Recommendations for copper tubing and connections.

Operational Check

Steps to verify proper unit operation after installation.

Electrical Connection Precautions

Safety and compliance guidelines for wiring.

Installation (Outdoor)

Location Requirements for Condensing Units

Criteria for selecting an optimal outdoor unit location.

Field Piping Arrangements

Notes on satisfactory operation and performance of field piping.

Maximum Pipe Length and Bends

Guidelines for pipe length and number of bends to maintain performance.

Installation Clearance Guidelines

Spacing requirements for multiple outdoor units.

Vacuuming and Charging Procedures

Steps for system evacuation and refrigerant charging.

FIELD-CHARGING GUIDELINES WITH SCROLL COMPRESSORS

Field-Charging Precautions

Safety and operational tips for charging scroll compressors.

Required Equipment for Field Charging

Lists essential tools for a satisfactory charging job.

Charging Hoses Selection

Discusses hose types and the importance of Shredder valve depressors.

Refrigerant Charge Recommendations

Guidance on determining the correct refrigerant charge.

Charge Limits for Compressors

Lists charge limits for different compressor models.

Compressor Charging Procedures

Step-by-step guide for charging compressors.

System Refrigerant Charge Level Guidelines

Guidelines for system refrigerant charge levels.

Special Precautions For R407c

R407C Characteristics and Handling

Defines R407C, its components, and handling guidelines.

Installation/Servicing Checklist for R407C

Lists items to check for tubing, oil, and refrigerant.

Handling and Installation Guidelines for R407C

Precautionary measures for handling and installing R407C systems.

Servicing And Maintenance

MAINTENANCE

Emphasizes regular maintenance for performance and durability.

Operation

Electrical Connection and Precautions

Guidelines for wiring, power supply, and grounding.

Operational Check Procedures

Steps to verify proper unit operation after charging.

Sequential Controller Block Diagram

Illustrates the sequential controller system connections.

Sequential Controller LCD Operating Instructions

Details the operation and functions of the LCD controller.

Operating Guide for Sequential Controller

Explains how to use the sequential controller keys and modes.

Timer Functions and Other Features

Describes timers, key lock, test run, and error codes.

INSTALLATION OF LCD REMOTE CONTROLLER

LCD Remote Controller Accessories and Installation

Lists included accessories and provides installation instructions.

Controller Configuration and Settings

Details model selection, auto mode, temperature, and time settings.

Operating Modes and Memory Functions

Lists available operating modes and last memory functions.

Troubleshooting

Fan and Compressor Malfunctions

Addresses issues where the fan does not work or works improperly.

Cooling Performance Issues

Addresses problems like unsatisfactory cooling or doors/windows open.

No Cooling Troubleshooting Guide

Flowchart for diagnosing no cooling conditions.

Cooling Performance Diagnosis

Flowcharts for insufficient cooling and pressure issues.

Pressure and Noisy Operation Diagnosis

Guides for diagnosing pressure and noisy operation issues.

Parts List

MDB Indoor Unit Parts

Lists components for various MDB indoor units.

MMC Outdoor Unit Parts

Lists components for various MMC outdoor units.

MDB Outdoor Unit Parts

Lists components for various MDB outdoor units.