Lennox Fhm 120 Installation, Operating And Maintenance Guide

TABLE OF CONTENTS
FLEXYII_WSHP-IOM-1307-E - 31 -
SERVICE MANUAL
COMMISSIONING
Commissioning report ..................................................................................................................................... 32
Refrigerant transaction logbook ...................................................................................................................... 35
Economiser and extraction ............................................................................................................................. 38
Before starting the unit ................................................................................................................................... 39
Starting the unit .............................................................................................................................................. 40
Run test .......................................................................................................................................................... 41
VENTILATION
Belt tension.......................................................................................................................... ............................ 42
Mounting and adjusting pulleys........................................................................................ ............................... 43
Airflow balancing............................................................................................................... .............................. 44
Filters...................................................................................................................................... ......................... 52
Air sock control ............................................................................................................................................... 53
UV Light .......................................................................................................................................................... 54
REFRIGERATION CIRCUIT
Electronic expansion valve ............................................................................................................................. 55
Advanced scroll temperature protection (ASTP)............................................................................................. 56
HEATING OPTIONS
Hot water coils ............................................................................................................................................... 57
Electric heater................................................................................................................................................. 59
Gas burners .................................................................................................................................................... 60
CONTROL VARIABLES ....................................................................................................................................... 71
MAINTENANCE DIAGNOSTIC ............................................................................................................................. 73
Refrigeration .................................................................................................................................................. 73
Indoor fan blower ............................................................................................................................................ 75
Outdoor axial fan ............................................................................................................................................ 75
Electrical heater .............................................................................................................................................. 75
Water leaks .................................................................................................................................................... 76
Climatic displays ............................................................................................................................................. 76
MAINTENANCE PLAN ......................................................................................................................................... 77
SPARE PART LIST ............................................................................................................................................... 80
WARRANTY .......................................................................................................................................................... 82
CONTROL MANUAL ............................................................................................................................................ 83

Lennox Fhm 120 Specifications

General

Brand	Lennox
Model	Fhm 120
Category	Heat Pump
Language	English