Enviro MQL B Series Owner's manual

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
2
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
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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
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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)

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ENVIRO-TEC
8
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
14
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)
1
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
10
FORM ET102.19-NOM1 (0521)
SECTION 1 - INTRODUCTION

Gasketing
The gasketing material is supplied with each module
for sections that need to be assembled on the job site.
Gasket the perimeter of each module. Overlap the
gasketing approximately 1/8” when splicing. This will
prevent air leakage between modules (see Figure 5 on
page 11).
LD14005
FIGURE 5 - GASKETAPPLICATION
1/8 MIN.
GASKET
Mounting Actuator
The Installing contractor takes all responsibility for the
mounting of all field installed actuators. No require-
ments are made for the position of these actuators due
to the number of options and arrangements available
and the assortment of specific applications.
Attention should be taken to insure proper actuator
support to prevent unnecessary stress in the linkage,
cabinet, or damper shaft. Multiple damper assemblies
must not be actuated from the shaft extension opposite
the connection link.
Mixing Box
Fresh air and return air dampers can be connected to-
gether and driven from the same actuator if the damp-
ers are the same size. If the dampers are different sizes
they must be driven by individual actuators and con-
trolled separately.
b. Remove all shipped loose parts from job site
to minimize theft. Tag and store parts in a
safe place until needed.
c. Cover entire equipment with protective tarp
or moisture proof cover. Extend cover under
equipment if stored on ground. Secure cover
with adequate tie downs or store indoors. Be
sure that all piping connections have protec-
tive shipping caps installed.
d. Monthly - remove cover from unit, open fan
access panel, remove belt ties and rotate fan
and motor slowly by hand to redistribute the
bearing grease and prevent bearing corro-
sion.
ASSEMBLING EQUIPMENT
All modules ship with the required bolts, nuts, screws
and gasket material to assemble the equipment. Bolt/
screw holes are accessible through the inside of the up-
stream module (Figure 3 on page 11, Figure 4 on
page 11).
FIGURE 3 - ASSEMBLY, UNITS WITHOUT BASE
RAILS
ATTACH CORNER
BRACKETS ON BOTH
MODULES WHEN
POSSIBLE
LD14004
FIGURE 4 - ASSEMBLY, UNITS WITH BASE RAILS
ENVIRO-TEC 11
SECTION 1 - INTRODUCTIONFORM ET102.19-NOM1 (0521)
1

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ENVIRO-TEC
12
FORM ET102.19-NOM1 (0521)
SECTION 1 - INTRODUCTION

FIGURE 6 - SUSPENDED UNITS
SIDE OF UNIT SIDE OF UNIT LD14006
INSTALLATION
This equipment must be installed in strict accordance
with any applicable local, state, and national codes
including but not limited to building, electrical, and
mechanical codes. On single wall equipment, lay rig-
id temporary protection, such as plywood, inside of
equipment to protect insulation during installation.
Suspended Units
When the equipment is to be suspended from a ceil-
ing, a base rail, angle iron, or channel must support
the equipment. The MQL product line is not designed
to be suspended from the top of the equipment. Be-
fore hanging the equipment, all field assembly must
be completed.
Suspending Using Factory Base Rail
The factory optional base rails have a 5/8” diameter
hole located in each corner for hanger rods. A hanger
rod must be installed in each corner of a module to
properly support the equipment and maintain unit’s
structural integrity.
Hanger rods must be located so that they
do not interfere with access panels.
ENVIRO-TEC 13
FORM ET102.19-NOM1 (0521)
2
SECTION 2 - INSTALLATION

Left Hand Fan
Access Door
FIGURE 7 - HAND IDENTIFICATION
ENVIRO-TEC
14
FORM ET102.19-NOM1 (0521)
SECTION 2 - INSTALLATION

Suspending Using Field Supplied Supports
All field supplied structural supports must be designed
to support entire unit weight including all appurtenanc-
es, motor, drives, and all live or dead loads. All sup-
ports must be designed to meet applicable local codes
and ordinances. Each module must be supported with
an angle iron or channel. The angle iron or channel
must cover the width and length of the equipment base
and must be designed to mechanically lock the unit to
the field supports (see Figure 6 on page 13).
Internal Isolation
Equipment may be supplied with internal spring isola-
tion. If so, removal of shipping hold-downs is required
before equipment start-up (see Figure 8 on page 15).
LD14007
SHIPPING HOLD-DOWNS-
REMOVE BEFORE START-UP
EXTRA HOLD-DOWN
ON SIZES 10 & ABOVE
FIGURE 8 - REMOVE HOLD DOWNS
External Isolation
Install vibration isolators (see Figure 9 on page 15)
in accordance with the job specifications and the in-
structions of the isolator manufacturer base. Base rails
are required for external isolation. If the coil module
is also isolated, the piping must be isolated or have a
flexible connection to prevent coil header damage due
to equipment movement. All piping, wiring, ductwork
and external connections must be isolated.
Service Clearance
Access to at least one side of the equipment is required
for routine service, maintenance and repair. Consider-
ation should be given to fan shaft, coil, filter removal,
motor, fan, bearings, and damper linkage access. Clear-
ance must meet or exceed applicable local and national
codes.
Panel Removal
To remove access panels, loosen the four retaining
screws and lift panel off. Alternately, lift off hinges
with quick turn fasteners.
General Piping
All pipe connections need to be supported indepen-
dently from the header. Failure to do so may cause
cracking at the headers. All piping shall be in accor-
dance with local codes and follow accepted industry
standards. DX coil distributor cap for test and nitrogen
charge must be removed before mounting TXV. All
coil connections are stubbed out of cabinet panel with
the exception of refrigerant (DX) coils. Field penetra-
tion of panels is required for liquid line piping.
FIGURE 9 - ISOLATOR INSTALLATION
ENVIRO-TEC 15
SECTION 2 - INSTALLATIONFORM ET102.19-NOM1 (0521)
2

DX CONNECTION STEPS
In the field:
1. Purge the system by pressing the Schrader valve.
2. Heat the soft solder and remove the Schrader
valve and are.
3. Attach thermal expansion valve (TXV) to dis-
tributor.
Notes:
• DX coils are shipped capped and sealed with a
Nitrogen holding charge.
• Distributors are not used if only one refrigerant
feeder tube provided.
• Metering devices on DX coils to be eld provided.
• TXV’s are the advised method of refrigerant regu-
lation into the coil.
• If a TXV is eld installed the xed orice must be
removed prior to TXV installation. TXV’s
• All pipe connections need to be supported inde-
pendently from the header. Failure to do so may
cause cracking at the headers. All piping shall be
in accordance with local codes and follow accept-
ed industry standards. DX coil distributor cap for
test and nitrogen charge must be removed before
mounting TXV.
• These coils may be used in systems with hot gas
bypass or heat pump condensing units, but require
the addition of ttings or refrigerant specialties to
be furnished and installed by others.
Condensate Drain
All condensate drains must have a trap installed. This
will prevent excessive condensate buildup and/or con-
densateoverflow. To ensurethat the trap remains sealed
the trap depth and the distance between the pan outlet
and the trap outlet should be the total static pressure of
the unit plus one inch (see Figure 10 on page 16).
TSP + 1
TSP +
1
FIGURE 10 - DRAIN TRAP
Electrical Installation
1. The Electrical service to the fan must be compat-
ible to the rated voltage on the motor nameplate,
and be in accordance with local codes.
2. The Fan segments metal casing must be connect-
ed to the buildings electrical ground on isolated
units.
3. Door electrical interlock is not offered.
4. Some motors have internal automatic reset over-
load protection.
5. Thermal motor protection is external to the unit.
Thermal protection and a disconnect switch are
provided by others.
6. Review wiring diagram and make necessary con-
nections accordingly.
ENVIRO-TEC
16
FORM ET102.19-NOM1 (0521)
SECTION 2 - INSTALLATION

INSPECTION & START-UP CHECKLIST
A. RECEIVING & INSPECTION
Unit Received Undamaged
Unit Arrangement/Hand Correct
Unit Received Complete As Ordered
Unit Structural Support Complete & Correct
B. HANDLING & INSTALLATION
Unit Mounted Level & Square
Proper Electrical Service Provided
Proper Service Switch/Disconnect Provided
Proper Chilled Water Line Size To Unit
Proper Refrigerant Line Sizes To Unit
Proper Steam Condensate Trap On Return Line
All Services To Unit In Code Compliance
Proper Access Provided For Unit & Accessories
Proper Overcurrent Protection Provided
Conrm No Debris Is Left In The Electric Heat
Section
Proper Hot Water Line To Unit
Proper Steam Line Sizes To Unit
Proper Steam Supply Pressure To Unit (15psi Max)
All Shipping Screws & Braces Removed
Damper Linkage Is Tight And In Correct Position
Install Per Seismic IOM As Required
All Shipped Loose Parts Installed
Installer Has Cleaned Out Interior
Clean Air Filter Installed
C. COOLING/HEATING CONNECTIONS
Protect Valve Package Components From Heat
Connect Field Piping To Unit
Install Drain Line & Traps As Required
Install Condensate Pan Under Piping As Required
Secure, Support & Mount Valve Packages
Pressure Test All Piping For Leaks
Insulate All Piping As Required
D. DUCTWORK CONNECTIONS
Install Ductwork, Fittings & Grilles As Required
Control Outside Air For Freeze Protection
Proper Supply & Return Grille Type & Size Used
Insulate All Ductwork As Required
Verify All Ductwork Is Complete, Dampers, And
Filters Are Installed Prior To Startup
E. ELECTRICAL CONNECTIONS
Refer To Unit Wiring Diagram
All Field Wiring In Code Compliance
Connect Incoming Power Service or Services
F. UNIT STARTUP
General Visual Unit & System Inspection
Record Ambient Temperature
Close All Unit Isolation Valves
Fill Systems With Water/Refrigerant
All Ductwork & Grilles In Place
Start Fans, Etc.
Check All Ductwork & Units For Air Leaks
Record All Final Settings For Future Use
Check All Dampers For Proper Operation
Verify Proper Heating Operation
Check All Piping For Leaks
Record Electrical Supply Voltage
Check All Wiring For Secure Connections
Flush Water Systems
Vent Water SystemsAs Required
All Unit Panels & Filters In Place
Check For Overload Condition Of All Units
Balance Air Systems As Required
Check Piping & Ductwork For Vibration
Verify Proper Cooling Operation
Reinstall All Covers & Access Panels
Check Unit Drain Pan To Conrm trap Is Free To
Drain And That Unit Drain Pan Does Not Hold Water
G. BLOWER / MOTOR
Check Sheave Set Screw Tightness
Check Blower Wheel Set Screw Tightness
Adjust Blower Speed as Necessary for Balancing
Airow
Check / Adjust Belt Tension
Check / Adjust Sheave Alignment
Fan Wheel Properly Aligned, Tight On Shaft And
Freely Moving
Fan Bearing Have Been Re-Lubricated Properly
ENVIRO-TEC 17
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ENVIRO-TEC
18
FORM ET102.19-NOM1 (0521)
SECTION 2 - INSTALLATION

ELECTRIC HEAT START-UP
Rotating parts and electrical shock haz-
ards exist. Lock out and tag out the fan
motor(s) and heat power disconnects be-
fore servicing. FOLLOW THE LATEST
“LOCKOUT TAGOUT” PROCEDURE.
Failure to follow proper safety precau-
tionsmayresultinseriousinjuryordeath.
All electrical connections in the heater, including both
field and factory made connections, should be checked
for tightness before operating the heater. In addition,
after a short period of operation, all connections should
again be checked for tightness.
DO NOT operate electric heat below the
minimum airow requirement. Minimum
airow requirement for blow thru electric
heaters is 70 CFM / KW.
A visual inspection of the heater elements should be
made prior to use of the heater. If physical damage is
evident, a Megohm test should be used to validate the
heater elements are safe for use. If a minimum value
of 10 Megohms is not achieved then any damaged ele-
ments or ceramic insulators must be replaced prior to
operation.
Ensure lters are clean and airow is at
minimumrequirement or greater.Prefer-
ably 100% for this start up procedure.
To operate this heater make sure all associated control
equipment is on, energize main supply disconnect and
set controlling thermostat above ambient temperature.
This heater is equipped with automatic and manual re-
set temperature limiting controls. If it fails to operate,
make sure manual resets are operative by pushing reset
buttons.
BEFORE START-UP CHECK
Thorough safety precautions should always be taken
when performing startup and service. Only qualified
individuals should perform these tasks.
Before entering the fan section, make sure that the fan
electrical power source is disconnected, locked and
tagged out in the “OFF” position.
1. Check that the unit is completely and properly
installed with ductwork connected. Check that
all construction debris is removed, and lters are
cleaned.
2. Check that all electrical work is nished and prop-
erly terminated. Check that all electrical connec-
tions are tight and that the proper voltage is con-
nected.
3. Motor and Ball bearings on fan shaft are pre-lu-
bricated and do not need grease before startup.
4. Check tightness of setscrews in bearings and fan
wheel(s). Make sure setscrews are torqued per
Table 1. (see Table 1 on page 22)
Equipmentdamagedue to loosesetscrews
or fasteners represents improper start-up
and equipment abuse. It is not covered by
the warranty.
5. Check tightness of sheave setscrews and/or
capscrews. Check alignment of fan and motor
sheaves and belt tension.
6. Rotate shaft manually by hand to make sure it is
free.
7. Fan Startup: Start Fan, and observe the rotation. If
the fan is operating backward, disconnect power
and reverse two legs of the 3-phase supply power.
8. To ensure that water connections and joints are
tight, leak test the piping systems.
9. Check that condensate drain is trapped.
START-UP
Units are not intended for temporary heat/cool or venti-
lation. Units are not designed or equipped to operate in
dusty environments. Filters may not provide adequate
protection when the unit is operated in a construction
environment. Operation of the units in conditions out-
lined above could result in damage to the equipment
or buildings and furnishings and void all manufacturer
warranty.
ENVIRO-TEC 19
FORM ET102.19-NOM1 (0521)
3
SECTION 3 - STARTUP

AC power current imbalance must not exceed 2%. Be
sure that the following guidelines are met:
1. AC power is within 10% of rate voltage with fre-
quency. (See equipment nameplate for ratings).
2. AC power is within 5% of rated frequency with
voltage.
3. A combined variation in voltage and frequency of
10% (sum of absolute values) of rated values pro-
vided the frequency variation does not exceed 5%
of rated frequency.
FIRST TIME MOTOR STARTUP
Check to see that all power to the equipment is off. Be
sure that the motor shaft is disconnected from the load,
and will not cause fan rotation.
1. Make sure that the mechanical installation is se-
cure. All bolts and nuts are tightened etc.
2. Ensure that all construction debris is removed
from inside of equipment.
3. Check lubrication of fan, motor bearings and
damper linkage
a. Note that all bearings are shipped completely
full of grease for corrosion protection. Bear-
ings may run warm temporarily on startup
until excess grease has discharged.
b. Check tightness of bearing setscrews or
locking collars. Also, check tightness of set-
screws on fan wheel and sheave.
c. Hand operate all damper linkage, to check
freedom of movement.
4. If equipment has been in storage or idle for some
time, check winding insulation integrity with
megger.
5. Inspect all electrical connections for proper termi-
nations, clearance, mechanical strength and elec-
trical continuity.
6. Be sure that all shipping materials, braces, and
construction debris are out of equipment.
7. Manually rotate motor shaft to ensure that it ro-
tates freely.
8. Replace all panels that were removed during in-
stallation.
9. Momentarily apply power and check direction of
rotation of motor shaft.
10. If motor rotation is wrong, be sure power is off
and change the motor lead connections, verify ro-
tation before you continue.
11. Start motor and ensure operation is smooth with-
out excessive vibration or noise. If so, run the mo-
tor for 1 hour with no load connected.
12. After 1 hour of operation, disconnect power and
connect the load to the motor shaft. Ensure that
motor is properly ventilated.
Air Balancing
When units are supplied with a variable pitch motor
sheave, they are as a rule set to the mid rpm range.
Field adjustment may be necessary to achieve required
airflow. See Drives on page 25 for variable pitch
sheave adjustment instructions.
When the final field alterations are concluded the cur-
rent draw of the motors should be checked and com-
pared to the full load current rating of the motor. The
amperage must not be above that shown on the motor
nameplate.
Sheaves
Upon completion of the air balance, it is a common in-
dustry recommendation that the variable pitched motor
sheave be replaced with a properly sized fixed sheave.
A matching fixed sheave will provide longer belt and
bearing life and vibration free operation. Initially, it is
best to have a variable pitched motor sheave for the
purpose of air balancing, but once the balance has been
achieved, fixed sheaves maintain balance and align-
ment more effectively. See Drives on page 25 for
variable pitch sheave adjustment instructions.
ENVIRO-TEC
20
FORM ET102.19-NOM1 (0521)
SECTION 3 - STARTUP