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Unico M1218 User Manual

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INSTALLATION MANUAL
FOR ‘M’ SERIES
AIR HANDLER UNITS
BULLETIN 30-020
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Unico M1218 Specifications

General IconGeneral
BrandUnico
ModelM1218
CategoryAir Handlers
LanguageEnglish

Summary

Important Safety and Preparation

Please Read Before Installation

Emphasizes the critical need to read the manual before beginning installation.

General Safety Warnings

Covers electrical shock hazards, grounding, wiring practices, and appliance usage by persons with reduced capabilities.

Unit Specifications and Components

EC Motor Temperature Limits

Details operational temperature ranges and their impact on the EC motor's lifespan.

Unit Assembly and Configuration

Installation and Connection Details

Secondary Drain Pan Installation

Mandates and details the installation of a secondary drain pan to prevent water damage.

Mounting and Ductwork

Piping and Refrigerant System Installation

Refrigerant Line Connections

Details the process of connecting refrigerant lines, including valve types.

TXV Installation Procedure

Step-by-step guide for installing the Thermostatic Expansion Valve (TXV) on cooling coils.

Electrical Wiring and Airflow Verification

Wiring Compliance and Safety

Outlines electrical wiring requirements, grounding, and adherence to safety standards.

System Charging and Operation

System Charging Procedures

General procedures and warnings regarding system charging, emphasizing environmental compliance.

Sub-cooling Measurement Method

Explains how to measure and interpret sub-cooling for proper system charge adjustment.

Superheat Measurement Method

Details the procedure for measuring superheat to verify expansion valve operation.

Maintenance and Service Procedures

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