Table of Contents
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TECHNICAL MANUAL
CD3 (929 SERIES) PACKAGED DX CLOSE CONTROL UNITS.
FOR USE IN SPLIT SYSTEMS
This manual details technical, installation and operating information for the CD3 range (929 series)
DX indoor units for use in conjunction with 550 series CKC condensing units or 542 series DCU
ducted condensing units. Remove the expansion device from the outdoor condensing unit if the
CD3 unit has capillaries or expansion valves fitted.
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Table of Contents
Related Manuals for Marstair CD3
Summarization of Contents
GENERAL UNIT OVERVIEW
DX Upflow Package Units
Details about twin circuit, packaged upflow units.
DIMENSIONS AND WEIGHTS
CD3 Indoor Unit Dimensions and Weights
Dimensions and weights for CD3 indoor units (Upflow/Downflow, Packed/Unpacked).
Condensing Unit Dimensions and Weights
Dimensions and weights for CKC and DCU condensing units.
PRODUCT SELECTION AND PERFORMANCE DATA
CD3 Cooling Performance Data
Cooling capacities for CD3 models with various CKC/DCU combinations.
AIRFLOW AND SOUND LEVEL SPECIFICATIONS
Airflow Rates for CD3, CKC, and DCU Units
Airflow specifications for CD3, CKC, and DCU units.
Sound Pressure Levels
Sound levels for CD3, CKC, and DCU units in various configurations.
INSTALLATION OF CD3 UNITS
CD3 Airflow Configuration Options
Diagrams illustrating different airflow configurations for CD3 units.
CD3 Unit Access and Mounting Procedures
Procedures for accessing CD3 components and mounting the unit.
UNIT DIMENSIONS AND FIXING DETAILS
Upflow Unit Service and Fixing Hole Centres
Service points and fixing hole centres for upflow units.
Downflow Unit Service and Fixing Hole Centres
Service points and fixing hole centres for downflow units.
CKC CONDENSING UNIT INSTALLATION AND DIMENSIONS
CKC Unit Mounting and Dimensions
Installation details, mounting kits, and dimensions for CKC units.
DCU DUCTED CONDENSING UNIT INSTALLATION AND DIMENSIONS
DCU Unit Mounting and Dimensions
Installation details, mounting methods, and dimensions for DCU units.
DCU Installation Methods (Suspension, Wall, Ductwork)
Methods for suspending, wall mounting, and ducting DCU units.
APPLICATION GUIDELINES AND PIPING
Pipe Sizing and Run Guidelines
Recommendations for pipe runs, sizing, and oil traps for performance.
Fitting Losses and Equivalent Pipe Lengths
Table of fitting losses and equivalent straight pipe lengths.
REFRIGERATION SYSTEM INSTALLATION AND CHARGING
Refrigerant Charge and Handling Procedures
Guidance on refrigerant charge, handling, and system evacuation.
ELECTRICAL SPECIFICATIONS AND DATA
System Electrical Data Combinations
Electrical data for CD3/CKC/DCU system combinations.
Recommended Fuse and Protection Sizes
Recommended fuse ratings for different cooling and heating modes.
UNIT AUXILIARY SYSTEMS AND CONTROLS
Condensate Drain Management
Details on connecting the condensate drain pipe.
Fan Speed Controller Settings and Operation
Instructions for setting the fan speed controller and its modes.
WIRING DIAGRAMS
CD3 Power Wiring Diagram (Sheet 1)
Power wiring schematic for CD3 units, Sheet 1.
CD3 Power Wiring Diagram (Sheet 2)
Power wiring schematic for CD3 units, Sheet 2.
CD3 Control Wiring Diagram
Control wiring schematic for CD3 units.
EXTERNAL UNIT WIRING DIAGRAMS
CKC Unit Wiring Diagrams
Wiring diagrams for CKC units (1-phase and 3-phase).
DCU Unit Wiring and Interconnecting Diagrams
Wiring for DCU units and interconnections between units.
Interconnecting Wiring Diagrams (1 & 3 Phase)
Visual representation of wiring between indoor and outdoor units.
OPTIONAL ACCESSORIES AND HUMIDIFIER
Condensate Pump System Details
Details and function of the optional condensate pump.
Humidifier System Description and Wiring
Description, installation, and wiring of the optional humidifier.
HUMIDIFIER SETTINGS, COMMISSIONING, AND OPERATION
Humidifier Settings, Commissioning, and Operation
Configuration, commissioning, and normal operation of the humidifier.
Humidifier Maintenance Procedures
Procedures for cleaning and maintaining the humidifier.
CONTROL SYSTEM OPERATION AND CONFIGURATION
pCONet BMS Control Kit Operation and Settings
Steps for operating, setting, and configuring the pCONet BMS control kit.
SUPERVISOR DATA COMMUNICATION PROTOCOLS
Digital Variables for Supervisor Communication
List of digital variables transmitted between pCO and supervisor.
Whole and Analog Variables for Supervisor
Lists of whole and analog variables for supervisor communication.
SYSTEM OPERATION MODES AND MAINTENANCE
CD3 Auto Changeover Operation and Wiring
How to operate CD3 units in run/standby mode and associated wiring.
USER INTERFACE AND CONTROL LEVELS
Unit Assist Mode and User Interface Overview
Explanation of Unit Assist mode and user interface levels.
Keypad Functions and Operation Guide
Explanation of the functions of each button on the keypad.
Operating Sequence and User Level Access
Initial sequence, default display, and second user level access.
ADVANCED CONTROL PARAMETER CONFIGURATION
Engineering Level Access and Settings
Accessing engineering level for settings like temperature and humidity limits.
ALARM MANAGEMENT AND DESCRIPTIONS
Alarm Configuration and Type Selection
Configuring temperature, humidity, and alarm types.
Alarm Descriptions (AL01-AL37)
Listing and description of various system alarms.
TIME CLOCK AND SCHEDULING FEATURES
Regulation Clock and Time Zone Settings
Setting clock, date, day, and time zones for temperature variation.
SYSTEM INPUT/OUTPUT MONITORING
Input/Output Status Monitoring
Monitoring analogue and digital inputs/outputs of the system.
SYSTEM MAINTENANCE AND PROCEDURES
Work Hours, History, and Probe Settings
Viewing work hours, alarm history, and setting probes.
Manual Operating Procedures
Procedures for manual control of fan, humidifier, and valves.
COMPONENT IDENTIFICATION - CD3 INDOOR UNIT
CD3 Indoor Unit Component Breakdown
Identification and location of components within the CD3 indoor unit.
COMPONENT IDENTIFICATION - DCU UNIT
DCU Unit Component Breakdown
Identification and location of components within the DCU unit.
COMPONENT IDENTIFICATION - CKC UNITS (30-100)
CKC 30-100 Unit Component Breakdown
Identification and location of components for CKC 30-100 units.
COMPONENT IDENTIFICATION - CKC UNITS (130-200)
CKC 130-200 Unit Component Breakdown
Identification and location of components for CKC 130-200 units.
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