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Table of Contents
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Table of Contents
Related Manuals for Unico M4860
Summarization of Contents
Introduction
General Information
Provides guidance for installers to ensure optimal installation and continuous trouble-free operation.
System Overview
Describes the Unico System as a complete indoor comfort system with air handler and small duct system.
Module Configurations
Details the modular nature, sizes, and possible arrangements of Unico 'M' Series air-handling units.
Scope, Part Numbers, and Location
Safety Precautions
Lists essential safety tips and precautions for installation and operation of the unit.
Unit Location and Clearances
Provides guidance on optimal unit placement and specifies minimum clearances for servicing (Figure 1).
EC Motor Temperature Limits
Operating Temperature Guidelines
Details normal and maximum operating temperature limits for the EC motor and their impact on lifespan.
Unit Assembly
Module Connection and Horizontal Setup
Covers fastening modules together and factory settings for horizontal airflow.
Vertical Installation Procedures
Cooling Module Configuration
Describes repositioning the top access panel of cooling modules for vertical configurations (Figure 7).
Vertical Plenum Module Use
Recommends using the vertical return plenum module or a conversion kit for up-flow installations.
Installing Modules
Return Air Adapter Installation
Details the installation of the UPC-104 Return Air Adapter for vertical systems (Figure 8).
Cooling Module Installation
Guides the installation of the cooling module onto the base or vertical plenum module (Figure 9).
Module Installation Steps
Blower Module Installation
Provides instructions for installing the blower module onto the assembled units (Figure 10).
Heating-Only Vertical System
Describes installation for heating-only systems and vertical configurations (Figure 11).
Mounting Options
Horizontal Platform Mounting
Guides mounting units horizontally on platforms, emphasizing drain line pitch.
Horizontal Suspended Mounting
Details methods for suspending units from ceilings or rafters using chains and hooks.
Vertical Mounting Considerations
Advises against suspending vertical units; recommends platform or floor mounting due to weight.
Duct Connections
Supply Plenum and Adapters
Discusses supply plenums, adapters, and airflow restrictions for proper system performance.
Restrictor Plate Installation
Explains the purpose and installation of the restrictor plate for airflow control and tuning.
Piping and Connections
Condensate Lines
Covers installation requirements for condensate lines, including pitch, traps, and insulation.
Refrigerant Connections
Details refrigerant line types, connections, and required accessories like filter driers.
Expansion Valve Installation Details
Expansion Valve Model Numbers
Lists model numbers for expansion valves compatible with different Unico coil models.
TXV and Connecting Nuts
Instructions for installing the TXV, including O-rings and tightening connecting nuts.
Connecting Refrigerant Lines
Connect Small Tube (iSeries Only)
Specific steps for connecting the small tube to the distributor for iSeries units.
Connect Line Set and Water Coils
Procedures for connecting refrigerant line sets and installing water coils.
Airflow and Static Pressure Measurement
Airflow Troubleshooting
Offers a chart to diagnose and resolve airflow issues based on common problems.
Measuring Static Pressure
Details the method for accurately measuring static pressure in the duct system.
System Charging Procedures
General Warnings and Mode
Stresses not venting refrigerant and using recovery devices, referring to specific bulletins and charging modes.
Saturation Pressure and Charging
R410A Saturation Pressure Table
Provides a table correlating R410A pressure with saturation temperature.
Charging by Gauge Pressures
Explains that gauge pressures are for verification, not charging, and notes lower suction pressures for Unico systems.
Maintenance Procedures
Motorized Blower Assembly Removal
Details the steps for removing the motorized blower assembly for service or replacement.
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