Table Of Contents - York AHU Operation And Maintenance

Air handling units

Table of Contents

FORM 102.20-OM2

ISSUE DATE: 6/01/2015

SECTION 1 - GENERAL INFORMATION AND SAFETY .......................................................................................13

Introduction ..................................................................................................................................................... 13

About This Manual.......................................................................................................................................... 13

Warranty ......................................................................................................................................................... 13

Responsibility For Safety ................................................................................................................................ 13

SECTION 2 - START-UP AND OPERATION ..........................................................................................................15

Before Start-Up .............................................................................................................................................. 15

Inspecting Fan Assembly ......................................................................................................................16

Inspecting Belts and Sheaves ............................................................................................................... 17

Checking Isolators .................................................................................................................................17

Start-Up .................................................................................................................................................19

Checking Operation of Fans .................................................................................................................. 19

Checking Operation of Dampers ........................................................................................................... 19

Energize Fan Motors .............................................................................................................................29

Variable Frequency Drive (VFD) .......................................................................................................... 29

Check Doors And Latches .....................................................................................................................29

Energy Recovery Wheel ........................................................................................................................29

Indirect Fired Gas Heat Start Up .......................................................................................................... 34

Starting the Electric Heater ...................................................................................................................46

Operation ........................................................................................................................................................ 50

Test And Balance ...................................................................................................................................50

Setting Limits .........................................................................................................................................50

Checking Motors, Belts and Sheaves ................................................................................................... 51

P-Cone

................................................................................................................................................51

SECTION 3 - MAINTENANCE ................................................................................................................................53

General Requirements ................................................................................................................................... 53

Inspect Parts .................................................................................................................................................. 54

Cabinet ..................................................................................................................................................54

Door Hardware and Gaskets ................................................................................................................. 54

Panels ...................................................................................................................................................54

Hoods and Louvers ...............................................................................................................................54

Bird Screens ..........................................................................................................................................54

Optional Moisture Eliminators ............................................................................................................... 54

Outdoor Air Hood ...................................................................................................................................54

Fan Segment (Supply, Return or Exhaust) .................................................................................................... 55

Removing the Fan .................................................................................................................................55

Checking the Fan ..................................................................................................................................55

Operating Adjustable Motor Base .................................................................................................................. 55

Standard ................................................................................................................................................55

Checking Belt Tension ...........................................................................................................................57

Aligning Sheaves ........................................................................................................................................... 57

Using a Straightedge .............................................................................................................................58

Using a String ........................................................................................................................................58

Belt Replacement Tensioning and Sheave Alignment for Top Mount ............................................................. 58

Lubrication ...................................................................................................................................................... 60

Fan Bearing Lubrication ........................................................................................................................61

JOHNSON CONTROLS