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Lennox Fhm 120 User Manual

Lennox Fhm 120
130 pages
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Providing indoor climate comfort
FLEXY & FLEXY WSHP
Installation, operating
and maintenance
FLEXYII-WSHP-IOM-0909-E

Table of Contents

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Lennox Fhm 120 Specifications

General IconGeneral
Model NumberFHM120
CategoryHeat Pump
RefrigerantR-410A
Phase3
Voltage208/230V

Summary

Installation Procedures

Transport and Handling

Procedures for safely moving and handling the unit.

Unit Dimensions and Weights

Specifications for unit size and mass for installation planning.

Lifting and Installation Precautions

Guidelines and safety measures for lifting and installing the unit.

Site Requirements and Clearances

Necessary site conditions, access, and minimum clearances for installation.

Duct and Water Connections

Recommendations for connecting ductwork and water systems.

Roof Mounting Frame and Curb Installation

Steps for installing roof mounting frames and various types of roof curbs.

Energy Recovery Module Installation

Steps for installing the energy recovery module.

Economiser and Extraction Setup

Configuration details for economiser and extraction systems.

Commissioning Process

Electrical Connections and Power Supply

Procedures for making electrical connections and verifying power supply.

Preliminary Checks and Unit Start-up

Essential checks before starting the unit and initial start-up procedures.

Powering and Control Settings Adjustment

Steps for powering the unit and adjusting control settings.

Operational and Safety Run Tests

Performing functional tests and safety checks during commissioning.

Ventilation System

Belt Tension and Pulley Adjustment

Procedures for checking and adjusting belt tension and pulleys.

Airflow Balancing Procedures

Methods for measuring and adjusting airflow to achieve optimal balance.

Filter Maintenance and Selection

Guidelines for filter replacement, cleaning, and fire classification.

Air Sock Control and UV Light

Information on air sock control and UV light option operation.

Heating Options

Hot Water Coil Installation and Freeze Protection

Details on hot water coil hydraulics, installation, and freeze protection.

Electric Heater Specifications

Information on electric heater capacities, stages, and wiring.

Gas Burner Installation and Pressure Adjustments

Preliminary checks, start-up, and pressure adjustments for gas burners.

Modulating Gas Burner Operation

Operation and adjustment procedures for modulating gas burners.

Electrical Data and Wiring Diagrams

Wiring Diagram Reference Legend

Explains the symbols and references used in wiring diagrams.

Main Current and Control Diagrams

Includes main current diagrams, controller schematics, and connection diagrams.

Electrical Control Variables and Inputs/Outputs

Details on logical and analogue input/output boards and control variables.

Refrigeration Circuit

Refrigerant Definition and Properties

Information about R410A refrigerant and its characteristics.

Advanced Scroll Temperature Protection (ASTP)

Explanation of the ASTP system and compressor protection.

Refrigeration Circuit Principle Sketches

Schematic diagrams illustrating refrigeration circuit configurations.

Hot Water Coil Diagram

Maintenance Diagnostic and Troubleshooting

Refrigeration System Faults

Troubleshooting guide for common refrigeration issues and LP/HP problems.

Fan Blower and Outdoor Fan Issues

Diagnosing and resolving faults related to fan blowers.

Electric Heater and Water Leak Troubleshooting

Troubleshooting steps for electric heater faults and water leaks.

Control Unit (DC50/DS50) Faults

Diagnosing and resolving problems with control units like DC50 and DS50.

Maintenance Plan

Preventive Maintenance Schedule

A detailed schedule of recommended maintenance tasks and their periodicity.

Warranty Information

General Warranty Terms and Conditions

Overview of the standard warranty terms and conditions.

Anti-Corrosion Warranty Details

Specific conditions and exclusions for the anti-corrosion warranty.

Certifications and Declarations

Various Product and Site Certifications

Collection of certificates including ISO, EC Conformity, and filter insulation.

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