Enviro MQL B Series Betriebsanleitung

MODEL MQL SERIES B

INSTALLATION, OPERATION & MAINTENANCE

INDOOR AIR HANDLING UNIT

Supersedes: ET102.19-NOM1 (517) Form ET102.19-NOM1 (0521)

This equipment is a relatively complicated apparatus.

During installation, operation maintenance or service,

individuals may be exposed to certain components or

conditions including, but not limited to: refrigerants,

materials under pressure, rotating components, and

both high and low voltage. Each of these items has the

potential, if misused or handled improperly, to cause

bodily injury or death. It is the obligation and respon-

sibility of operating/service personnel to identify and

recognize these inherent hazards, protect themselves,

and proceed safely in completing their tasks. Failure

to comply with any of these requirements could result

in serious damage to the equipment and the property in

IMPORTANT!

READ BEFORE PROCEEDING!

GENERAL SAFETY GUIDELINES

which it is situated, as well as severe personal injury or

death to themselves and people at the site.

This document is intended for use by owner-authorized

operating/service personnel. It is expected that these

individuals possess independent training that will en-

able them to perform their assigned tasks properly and

safely. It is essential that, prior to performing any task

on this equipment, this individual shall have read and

understood this document and any referenced mate-

rials. This individual shall also be familiar with and

comply with all applicable governmental standards and

regulations pertaining to the task in question.

SAFETY SYMBOLS

The following symbols are used in this document to alert the reader to specific situations:

Indicates a possible hazardous situation

whichwillresultindeathorseriousinjury

if proper care is not taken.

Indicates a potentially hazardous situa-

tion which will result in possible injuries

or damage to equipment if proper care is

not taken.

Identies a hazard which could lead to

damage to the machine, damage to other

equipment and/or environmental pollu-

tion if proper care is not taken or instruc-

tions and are not followed.

Highlights additional information useful

to the technician in completing the work

being performed properly.

External wiring, unless specied as an optional connection in the manufacturer’s product line, is

not to be connected inside the control cabinet. Devices such as relays, switches, transducers and

controls and any external wiring must not be installed inside the micro panel. All wiring must be in

accordance with ENVIRO-TEC’ published specications and must be performed only by a qualied

electrician. ENVIRO-TEC will NOT be responsible for damage/problems resulting from improper

connections to the controls or application of improper control signals. Failure to follow this warn-

ing will void the manufacturer’s warranty and cause serious damage to property or personal injury.

ENVIRO-TEC

FORM ET102.19-NOM1 (0521)

The equipment covered by this manual is designed for

safe and reliable operation when installed and operated

within its design specification limits. To avoid person-

al injury or damage to equipment or property while

installing or operating this equipment, it is essential

that qualified, experienced personnel perform these

functions using good judgment and safe practices. See

the following cautionary statements.

ELECTRICAL SHOCK HAZARDS.

All power must be disconnected prior to

installation and serving this equipment.

More than one source of power may be

present. Disconnect all power sources

to avoid electrocution or shock injuries.

MOVING PARTS HAZARDS. Motor

and Blower must be disconnected prior

to opening access panels. Motors can

start automatically, disconnect all power

and control circuits prior to servicing to

avoid serious crushing or dismember-

ment injuries.

HOTPARTS HAZARDS.ElectricResis-

tance heating elements must be discon-

nectedpriortoservicing.ElectricHeaters

may start automatically, disconnect all

powerandcontrolcircuits prior toservic-

ing to avoid burns.

SAFETY CONSIDERATIONS

WARNING

Failure to follow these instructions could result in death, serious

injury or equipment damage

Follow all warnings and instructions in the unit's Manual(s).

1.Follow all applicable regulations and safety practices during rigging and lifting.

2.Prepare and follow written rigging and lifting plan.

3.Lifting must be directed by trained professional rigger.

4.Spreader bars must be used and be long enough to prevent rigging from contacting

unit.

5.Use all and only designated lift points according to unit's Manual(s).

6.Locate center of gravity through trial lifts to account for possible variations in unit

configuration.

7.Use rigging and lifting techniques that keep unit stable and level.

8.Keep clear of unit when lifted.

ENVIRO-TEC 3

FORM ET102.19-NOM1 (0521)

CHANGEABILITY OF THIS DOCUMENT

In complying with ENVIRO-TEC’ policy for continu-

ous product improvement, the information contained

in this document is subject to change without no-

tice. ENVIRO-TEC makes no commitment to update

or provide current information automatically to the

manual owner. Updated manuals, if applicable, can be

obtained by contacting the nearest ENVIRO-TEC Ser-

vice office.

Operating/servicepersonnelmaintainresponsibility for

the applicability of these documents to the equipment.

If there is any question regarding the applicability of

these documents, the technician should verify whether

the equipment has been modified and if current litera-

ture is available from the owner of the equipment prior

to performing any work on the chiller.

Checkthat the unitassembly andcompo-

nent weights can be safely supported by

rigging and lifting equipment.

All assemblies must be adequately se-

cured during lifting and rigging by

temporary supports and restraints until

equipment is permanently fastened and

set in its nal location.

All unit temporary and permanent sup-

ports must be capable of safely sup-

porting the equipment’s weight and any

additional live or dead loads that may

be encountered. All supports must be

designed to meet applicable local codes

and ordinances.

All fastening devices must be designed

to mechanically lock the assembly in

place without the capability of loosening

or breaking away due to system opera-

tion and vibration, vibration, impact or

seismic events.

Secure all dampers when servicing

damper, actuator or linkages. Dampers

may activate automatically, disconnect

control circuits or pneumatic control

systems to avoid injury.

Protect adjacent flammable materials

when brazing, Use ame and heat pro-

tection barriers where needed. Have re

extinguisher available and ready for im-

mediate use.

ENVIRO-TEC

FORM ET102.19-NOM1 (0521)

TABLE OF CONTENTS

SECTION 1 - INTRODUCTION.................................................................................................................................9

Inspection.........................................................................................................................................................9

Introduction.......................................................................................................................................................9

General....................................................................................................................................................9

Unit Identification..............................................................................................................................................9

Hand Identification............................................................................................................................................9

Rigging And Handling.......................................................................................................................................9

Storage...........................................................................................................................................................10

Assembling Equipment...................................................................................................................................11

Gasketing..............................................................................................................................................11

Mounting Actuator ................................................................................................................................11

Mixing Box.............................................................................................................................................11

SECTION 2 - INSTALLATION ................................................................................................................................13

Installation .....................................................................................................................................................13

Suspended Units...................................................................................................................................13

Suspending Using Factory Base Rail ............................................................................................13

Suspending Using Field Supplied Supports...................................................................................15

Internal Isolation....................................................................................................................................15

External Isolation ..................................................................................................................................15

Service Clearance.................................................................................................................................15

Panel Removal...............................................................................................................................15

General Piping.......................................................................................................................................15

DX Connection Steps.....................................................................................................................................16

In the eld:.............................................................................................................................................16

Notes:.............................................................................................................................................16

Condensate Drain .................................................................................................................................16

Electrical Installation..............................................................................................................................16

INSPECTION & START-UP CHECKLIST .............................................................................................17

SECTION 3 - STARTUP..........................................................................................................................................19

Electric Heat Start-Up.....................................................................................................................................19

Before Start-Up Check...................................................................................................................................19

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

First Time Motor Startup.................................................................................................................................20

Air Balancing.........................................................................................................................................20

Sheaves.........................................................................................................................................20

SECTION 4 - PERIODIC MAINTENANCE AND SERVICE....................................................................................21

PERIODIC MAINTENANCE AND SERVICE..................................................................................................21

General..................................................................................................................................................21

After 48 Hours of Operation ..................................................................................................................21

Weekly...................................................................................................................................................21

Every Month..........................................................................................................................................21

Every Three to Six Months....................................................................................................................21

ENVIRO-TEC 5

FORM ET102.19-NOM1 (0521)

TABLE OF CONTENTS (CONT’D)

Every Year.............................................................................................................................................21

Drain Pan ..............................................................................................................................................22

Inspecting and Cleaning Drain Pans..............................................................................................22

Air Filters...............................................................................................................................................22

Throwaway Filters..........................................................................................................................22

Fans ......................................................................................................................................................22

Inspecting and Cleaning Fans .......................................................................................................22

Fan Bearings.........................................................................................................................................23

Bearing Set Screw Alignment ........................................................................................................23

Lubricating the Fan Bearing..................................................................................................................23

Motor.....................................................................................................................................................23

General Inspection.........................................................................................................................23

Lubrication and Bearings...............................................................................................................24

Types of Grease.............................................................................................................................24

Lubrication Procedure....................................................................................................................24

With Grease Outlet Plug................................................................................................................24

Without Grease Outlet Plug...........................................................................................................24

Drives....................................................................................................................................................25

Mounting Straight Bore Sheaves...................................................................................................25

Mounting Split Tapper Sheaves.....................................................................................................26

Adjust Variable Pitched Sheaves...................................................................................................26

Belts ......................................................................................................................................................27

Adjusting Belt Tension....................................................................................................................27

How to Increase Belt Life ..............................................................................................................27

Coils ......................................................................................................................................................28

Steam, Hot Water and Chilled Water Coils....................................................................................28

Refrigerant Coils............................................................................................................................29

Winterizing Water Coils.........................................................................................................................29

OPERATING GUIDELINES............................................................................................................................29

Operating Limits....................................................................................................................................29

Vibration Levels.....................................................................................................................................29

Vibration Causes...................................................................................................................................30

Periodic Service and Maintenance........................................................................................................30

APPLICATION RECOMMENDATION FOR COILS........................................................................................30

General..................................................................................................................................................30

Water Cooling Coils...............................................................................................................................30

Direct Expansion Coils..........................................................................................................................30

Steam Coils...........................................................................................................................................31

Water Heating Coils...............................................................................................................................32

SECTION 5 - TROUBLESHOOTING......................................................................................................................33

ENVIRO-TEC

FORM ET102.19-NOM1 (0521)

TABLE OF CONTENTS

LIST OF FIGURES

LIST OF TABLES

FIGURE 1 - Lifting Unit With Base Rails ...................................................................................................................9

FIGURE 2 - Lifting Units Without Base Rails...........................................................................................................10

FIGURE 3 - Assembly, Units Without Base Rails....................................................................................................11

FIGURE 4 - Assembly, Units With Base Rails.........................................................................................................11

FIGURE 5 - Gasket Application...............................................................................................................................11

FIGURE 6 - Suspended Units .................................................................................................................................12

FIGURE 7 - Hand Identication...............................................................................................................................13

FIGURE 8 - Remove Hold Downs...........................................................................................................................14

FIGURE 9 - Isolator Installation...............................................................................................................................14

FIGURE 10 - Drain Trap..........................................................................................................................................15

FIGURE 11 - Mounting Sheaves.............................................................................................................................21

FIGURE 12 - Sheave Alignment..............................................................................................................................22

FIGURE 13 - Split Tapper Sheave Mounting...........................................................................................................22

FIGURE 14 - Belt Tension.......................................................................................................................................23

TABLE 1 - Minimum Hex Head Bolt Torque In Lb-Ft - Grade 5 Bolt.......................................................................18

TABLE 2 - Recommended Greasing Intervals Of Fan Bearings.............................................................................19

TABLE 3 - Recommended Greases For Various Operating Ranges......................................................................20

TABLE 4 - Fan Bearing Maximum Grease Capacity...............................................................................................20

TABLE 5 - Recommended Motor Greasing Schedule ............................................................................................21

TABLE 6 - Determining Deflection Force................................................................................................................25

TABLE 7 - Forward Curve Fan Data.......................................................................................................................26

TABLE 8 - Vibration Levels.....................................................................................................................................26

TABLE 9 - MQL Troubleshooting Analysis..............................................................................................................29

TABLE OF CONTENTS (CONT’D)

ENVIRO-TEC 7

LIST OF FIGURESFORM ET102.19-NOM1 (0521)

THIS PAGE INTENTIONALLY LEFT BLANK.

ENVIRO-TEC

FORM ET102.19-NOM1 (0521)

LIST OF FIGURES

INSPECTION

Upon receipt of equipment, carefully check all items

against the bill of lading to ensure that all equipment

has been received. Note any discrepancy on the bill of

lading before signing.

Inspect all equipment for any signs of damage caused

during transit. Note any visual damage on the bill of

lading before signing. Immediately report all visual

and concealed damage to the carrier and file a claim.

INTRODUCTION

General

In order to ensure long and trouble free life, the

equipment should have proper care and maintenance.

Enough space should be left around the unit for service

and repair, see .Installation on page 13

Equipment, as shipped, is factory assembled as far

as job specifications and shipping limitations allow.

Where field assembly is required, bolts, nuts, screws

and gasketing material are provided with each module.

Modules bolt together from the inside of the upstream

module.

UNIT IDENTIFICATION

To ensure the assembled MQL modules are in the

proper sequence, each module has an identifying code

and an airflow direction label. The proper assembly

sequence is listed on the supply fan nametag. The first

listed module is the first section in the direction of air-

flow.

HAND IDENTIFICATION

Coil connections and other components are located

and described as left or right hand. The proper orienta-

tion to describe the proper hand is when airflow is at

your back. Vertical stacked top sections maintain the

same handling as lower section. See Figure 7 on page

RIGGING AND HANDLING

The MQL air handler can ship as separate modules,

fully assembled, or in separately assembled sections

depending on the unit size and application. The equip-

ment must be rigged as it was shipped from the factory.

Do not remove shipping skid or protective cover until

equipment is ready for final placement, as damage to

equipment can result. Do not remove protective caps

from piping connections until ready to connect piping.

FIGURE 1 - LIFT POINTS FOR UNITS WITH BASE RAILS

ENVIRO-TEC 9

FORM ET102.19-NOM1 (0521)

SECTION 1 - INTRODUCTION

Units with base rails can be rigged by means of lift-

ing holes on the end of base rail (see Figure 1 on page

9).

Units without base rails must be lifted with slings.

Place slings at ends and joints of modules to prevent

damage to equipment (see Figure 2 on page 10).

Spreader bars must be used to prevent damage to equip-

ment. Avoid twisting or uneven lifting of equipment.

Do not lift equipment by coil connection or headers.

See submittal drawings.

If transporting units with forklift, forks must extend the

full width of unit to prevent damage to bottom of unit.

Always take special care when handling the blower

module. All fans are dynamically balanced. Rough

handling may cause bearing misalignment and/or shaft

damage.

STORAGE

To transfer equipment from truck to storage site, refer

to Rigging And Handling on page 9

If a forklift is used, lift only from heavy

end of skid.

1. Do not stack unit modules or accessories during

storage. Stacking can cause damage or deforma-

tion.

2. If equipment is to be stored for more than two

weeks prior to installation, observe the following

precautions:

a. Choose a dry storage site that is reasonably

level and sturdy to prevent undue stress or

permanent damage to the equipment struc-

ture or components. Do not store equipment

on vibrating surface. Damage to station-

ary bearings can occur. Set equipment off

ground if in moisture prone areas.

FIGURE 2 - LIFT POINTS FOR UNITS WITH BASE RAILS

ENVIRO-TEC

FORM ET102.19-NOM1 (0521)

SECTION 1 - INTRODUCTION

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