Enviro Series D Owner's manual

INSTALLATION, OPERATION & MAINTENANCE
HORIZONTAL, LOW PROFILE FAN COILS
Series D
Supersedes ET115.24-NOM11 (417) Form ET115.24-NOM11 (118)

ENVIRO-TEC
ii
FORM ET115.24-NOM11 (118)
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Considerations ....................... 1
TABLE OF CONTENTS
Section One - Receipt & Initial Installation
HL Series Features.......................... 2
Preface ................................... 3
Unpacking & Inspection ...................... 3
Handling & Installation ....................... 3
Drain Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Cooling/Heating Medium Connections ........... 6
Auxiliary Drain Pans ......................... 7
Ductwork Connections . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Connections ....................... 7
Electrical Enclosure ......................... 7
Telescoping Bottom Panel .................... 8
Model HLP Horizontal Fan Coil Optional
Telescoping Bottom Panel Assembly,
Typical Installation Instructions ............. 9
Service & Clearance Requirements ............ 10
Height Restricted Application . . . . . . . . . . . . . . . . . 11
Width Restricted Application.................. 12
External Space Requirements ................ 13
Section Two - Start-Up
General.................................. 14
Cooling/Heating System..................... 14
Air System Balancing ....................... 14
Motor & Fan Data .......................... 15
Water System Balancing .................... 16
Controls Operation ......................... 16
Section Three - Normal Operation &
Periodic Maintenance
General.................................. 17
Motor/Blower Assembly ..................... 17
Fan Deck ................................ 17
Coil ..................................... 18
Start-Up Checklist
Inspection & Start-up Checklist ............... 27
Section Five - Fan Relay Board
Installation ............................... 28
Reference Wire Diagram .................... 30
Ratings .................................. 31
Tools Needed for Installation/Troubleshooting .... 32
Jumpers ................................. 33
Test Points ............................... 33
Screw Terminal Signals ..................... 34
Checking Wire Harnesses ................... 35
Section Six - Troubleshooting
Fan Relay Board........................... 36
PSC Motor ............................... 37
EC Motor ................................ 40
Cooling System ........................... 44
Electric Heat .............................. 45
Electric Resistance Heater Assembly........... 18
Electrical Wiring & Controls .................. 18
Valves & Piping............................ 18
Filters, Throwaway ......................... 19
Drain.................................... 20
Optional Item Installation .................... 21
Condensate Pump ...................... 21
Current Switch Device ................... 21
Di󰀨erentialAirPressureSwitch ............ 22
Discharge Air Sensor .................... 23
Condensate Float Switch Installation........ 25
Replacement Parts......................... 26
Section Four - Inspection &
Low Temperature Cutout Control ........... 23
Unit Weight Data . . . . . . . . . . . .. ...........24

ENVIRO-TEC 1
FORM ET115.24-NOM11 (118)
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to areas of potential hazard:
CAUTION identies a hazard which
could lead to damage to the machine,
damage to other equipment and/or
environmental pollution. Usually an
instruction will be given, together with
a brief explanation.
NOTE is used to highlight additional
information which may be helpful to
you.
DANGER indicates an imminently
hazardous situation which, if not
avoided, will result in death or serious
injury.
WARNING indicates a potentially
hazardous situation which, if not
avoided, could result in death or
serious injury.
SAFETY CONSIDERATIONS
The equipment covered by this manual is designed for
safe and reliable operation when installed and operated
within its design specication limits. To avoid personal
injury or damage to equipment or property while
installing or operating this equipment, it is essential
that qualied, 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 servicing 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
dismemberment injuries.
HOT PARTS HAZARD. Electric
Resistance heating elements must
be disconnected prior to servicing.
Electric Heaters may start automatically,
disconnect all power and control circuits
prior to servicing to avoid burns.
Check that the unit assembly and
component weights can be safely
supported by rigging and lifting
equipment.
All assemblies must be adequately
secured 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
supports must be capable of safely
supporting 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 operation and vibration.
Protect adjacent ammable materials
when brazing, Use flame and heat
protection barriers where needed.
Have re extinguisher available and
ready for immediate use.

ENVIRO-TEC
2
FORM ET115.24-NOM11 (118)
HL SERIES FEATURES
PREFACE
ENVIRO-TEC fan coils represent a prudent investment
which can, with proper installation, operation, and
regular maintenance, give trouble-free operation and
long service.
Your equipment is initially protected under the
manufacturer’s standard warranty; however, this
warranty is provided under the condition that the steps
outlined in this manual for initial inspection, proper
installation, regular periodic maintenance, and everyday
operation of the equipment be followed in detail. This
manual should be fully reviewed in advance of any
actual work being done on the equipment. Should
any questions arise, please contact your local Sales
Representative or the factory BEFORE proceeding.
The equipment covered by this manual is available with
a vast variety of options and accessories. Consult the
approved unit submittal, order acknowledgement, and
other manuals for details on the options and accessories
provided with the equipment on each project.
No attempt should be made to handle,
install, or service any unit without
following safe practices regarding
mechanical equipment.
All power must be disconnected before
any installation or service should
be attempted. More than one power
source may be supplied to a unit.
Power to remote mounted control
devices may not be supplied through
the unit. Never wear bulky or loose
tting clothing when working on any
mechanical equipment. Gloves should
only be worn when required for proper
protection from heat or other possible
injury. Safety glasses or goggles
should always be worn when drilling,
cutting, or working with chemicals
such as refrigerants or lubricants.
SECTION ONE - RECEIPT & INITIAL INSTALLATION
Electric heat
Controls
Blower
Outside air duct collar
Filter access
(not shown)
Valve package
(factory mounted
or shipped loose)
Coils
Supply air
Right or left hand coil
and drain connections,
same or opposite end
Removable
drain pan
Condensate
pump
Auxiliary
drain pan
Return air
Motor

ENVIRO-TEC 3
FORM ET115.24-NOM11 (118)
Never pressurize any equipment
beyond specied operating pressures.
Always pressure test with some inert
uid or gas such as clear water or dry
nitrogen to avoid possible damage
or injury in the event of a leak or
component failure during testing.
Always protect adjacent flammable
material when welding, brazing or
soldering. Use suitable heat shield
material to contain sparks or drops of
solder. Have re extinguisher available
for use when welding or brazing.
The manufacturer assumes no responsibility for personal
injury or property damage resulting from improper
or unsafe practices during the handling, installation,
service, or operation of any equipment.
UNPACKING & INSPECTION
All units are carefully inspected at the factory throughout
the manufacturing process under a strict detailed quality
assurance program, and where possible, all major
components and subassemblies are carefully tested for
proper operation and veried to be in full compliance
with the factory manufacturing documents. Customer
furnished components such as control valves, switches
and DDC controls are not factory tested.
Each unit is carefully packaged for shipment to avoid
damage during normal transport and handling. The
equipment should always be stored in a dry place in the
proper orientation as marked on the carton.
All shipments are made F.O.B. factory and it is the
responsibility of the receiving party to inspect the
equipment upon arrival. Any obvious damage to the
carton and/or its contents should be recorded on the bill of
lading and a claim should be led with the freight carrier.
After determining the condition of the carton exterior,
carefully remove each unit from the carton and inspect
for hidden damage. At this time check to make sure that
“furnished only” items such as switches, thermostats,
etc., are accounted for. Any hidden damage should be
recorded and immediately reported to the carrier and a
claim must be led. In the event a claim for shipping
damage is led, the unit, shipping carton, and all packing
must be retained for physical inspection by the freight
carrier. All equipment should be stored in the factory-
shipping carton with internal packing in place until
installation.
At the time of receipt, the equipment type and
arrangement should be verified against the order
documents. Should any discrepancy be found, the local
Sales Representative should be notied immediately
so that the proper action may be instituted. Should
any question arise concerning warranty repairs, the
factory must be notified BEFORE any corrective
action is taken. Where local repairs or alterations can
be accomplished, the factory must be fully informed as
to the extent and expected cost of those repairs before
work is begun. Where factory operations are required,
the factory must be contacted for authorization to return
equipment and a Return Authorization Number will be
issued. Unauthorized return shipments of equipment
and shipments not marked with an authorization number
will be refused. In addition, the manufacturer will not
accept any claims for unauthorized expenses.
CODE COMPLIANCE
This equipment has been manufactured and certied in
accordance with UL 1995-Standard for Safety, Heating
and Cooling Equipment (CAN/CSA C22.2 NO 236-
M90) and bears the Electrical Testing Laboratories
(ETL) Mark under ETL File No.: 3036742-002.
HANDLING & INSTALLATION
While all equipment is designed for durability and
fabricated for sturdy construction and may present a
rugged appearance, great care must be taken to assure
that no force or pressure be applied to the coil, piping or
drain stub-outs during handling. Also, depending on the
options and accessories, some units could contain delicate
components that may be damaged by improper handling.
Wherever possible, all units should be maintained in an
upright position and handled by the chassis as close as
possible to the mounting point locations.
In the case of a full cabinet unit, the unit must obviously
be handled by the exterior casing. This is acceptable
providing the unit is again maintained in an upright
position and no impact forces are applied that may
damage internal components, access panels, or painted
surfaces. The equipment covered in this manual IS NOT
suitable for outdoor installations. The equipment should
never be stored or installed where it may be subjected
to a hostile environment such as rain, snow, or extreme
temperatures.

ENVIRO-TEC
4
FORM ET115.24-NOM11 (118)
During and after installation, special care must be taken
to prevent foreign material such as paint, plaster, and
drywall dust from being deposited in the drain pan or
on the motor or blower wheels. Failure to do so may
have serious adverse eects on unit operation and in
the case of the motor and blower assembly, may result
in immediate or premature failure. All manufacturers’
warranties are void if foreign material is allowed to be
deposited on the motor or blower wheels of any unit.
Some units and/or job conditions may require some form
of temporary covering during construction.
While the manufacturer does not become involved
in the design and selection of support methods and
components, it should be noted that unacceptable system
operating characteristics and/or performance may result
from improper or inadequate unit structural support.
In addition, adequate clearance must be provided for
service and removal of the equipment and its accessory
components. Anchoring the equipment in place is
accomplished by using the mounting points provided
and positioning the unit to maintain the unit on a LEVEL
plane. The drain pan is internally sloped toward the
outlet connection. Care must be taken to insure that
the unit drain pan does not slope away from the outlet
connection. All units are supplied with integrated hanger
brackets with optional grommet isolators and brass
inserts for use with 3/8" all thread hanger rod.
The unit’s drain pan is factory sloped toward the
drain connection when the unit is
installed level and plumb.
A
DETAIL A
THREADED ROD
NUT
VIBRATION ISOLATOR
NUT
WASHER
WASHER
FAN COIL UNIT
SIDE VIEW
NOTES:
1. ALL BENDS ARE 90 UNLESS OTHERWISE SPECIFIED.
2. ALL FORMED DIMENSIONS ARE OUTSIDE DIMENSIONS.
3. FEATURE QUANTITIES MAY VARY FOR DIFFERENT
CONFIGURATIONS.
TYPICAL CEILING INSTALLATION
Figure 1: Typical ceiling installation

ENVIRO-TEC 5
FORM ET115.24-NOM11 (118)
DRAIN PAN
Standard drain pans are externally insulated, single wall
galvanized steel and can be equipped with a secondary
drain connection. The HL drain pan is easily removable
for cleaning. See illustration below. Auxiliary drip pan
to catch condensed moisture from valves and piping
must be sloped toward the drain pan.
The condensate drain pan can be removed without re-
quiring common hand tools. The drain pan is secured
to the unit by four sheet metal tabs that slide into four
respective slots on the drain pan.
Prior to removing the drain pan, make sure all
accessories and eld connections have been
appropriately disconnected from the drain pan.
The drain pan can be removed in three steps. First,
push the drain pan engagement lever to unlock the
drain pan from the coil. Next, while continuing to
push the lever, support the weight of the drain pan
and slide the drain pan towards the drain connection.
After the drain pan slides approximately 1.5 inches,
it will be completely disengaged from the coil.
Lastly, support the weight of the drain pan and
safely lower the drain pan for servicing. Reinstall
prior to unit startup.
COILS
All fan coils are available in 2 or 4 pipe congurations.
Heating coils are available in reheat or preheat position.
Heating and cooling coils are available with right, left
or opposite side connections.
Verify that the proper types of service are actually
provided to the unit. On units with steam heating
coils, the maximum steam pressure applied to the unit
should never exceed 15 PSIG. The drain piping and
steam trap should be sized and routed to allow for
proper condensate ow. The electrical service to the
unit should be compared to the unit nameplate to verify
compatibility. The routing and sizing of all piping, and
the type and sizing of all wiring and other electrical
components such as circuit breakers, disconnect
switches, etc., should be determined by the individual
job requirements and should not be based on the size
and/or type of connection provided on the equipment.
All installations should be made in compliance with all
governing codes and ordinances. Compliance with all
codes is the responsibility of the installing contractor.
Figure 2a-2d: Typical drain pan removal
Figure 2a
Figure 2b Figure 2c
Figure 2d

ENVIRO-TEC
6
FORM ET115.24-NOM11 (118)
COOLING/HEATING MEDIUM CONNECTIONS
Toxic residues and loose particles
resulting from manufacturing and
eld piping techniques such as joint
compounds, soldering ux, and metal
shavings may be present in the unit
and the piping system. Not for use with
domestic or potable water systems.
Submittals and Product Catalogs detailing unit operation,
controls, and connections should be thoroughly
reviewed BEFORE beginning the connection of the
various cooling and/or heating mediums to the unit.
All accessory valve packages should be installed as
required, and all service valves should be checked for
proper operation.
If coil and valve package connections are to be made
with “sweat” or solder joint, care should be taken to
assure that no components in the valve package are
subjected to a high temperature which may damage seals
or other materials. Many two-position electric control
valves, depending on valve operation, are provided with
a manual-opening lever. This lever should be placed
in the “open” position during all soldering or brazing
operations. Valve bodies should be wrapped with a wet
rag to help dissipate heat encountered during brazing.
If the valve package connection at the coil is made with
a union, the coil side of the union must be prevented
from twisting (“backed up”) during tightening to prevent
damage to the coil tubing. Over-tightening must be
avoided to prevent distorting the union seal surface
and destroying the union. Due to the diversity of valve
packages for this product, install the valve packages with
no leaks or interference between components during
operation and maintenance. In the case of eld installed
valves and piping, the chilled water valve cluster (or
metering device on DX units) should be installed in
such a way that any dripping or sweating is contained
in the auxiliary drain pan or other device. Valves and
TXV’s should be secured or supported to avoid damage
to coil headers or distributor tubes. All valves, pipes,
and components must be suciently supported to ensure
structural integrity and proper operation of the unit.
All water coils must be protected from
freezing after initial lling with water.
Even if the system is drained, unit coils
may still hold enough water to cause
damage when exposed to temperatures
below freezing.
Refrigerant systems should be tested with dry nitrogen
rather than air to prevent the introduction of moisture
into the system. In the event that leaking or defective
components are discovered, the Sales Representative
must be notied BEFORE any repairs are attempted.
All leaks should be repaired before proceeding with
the installation.
Figure 3a-3d: Typical auxiliary drain pan removal
Figure 3a
Figure 3b
Figure 3c
Figure 3d

ENVIRO-TEC 7
FORM ET115.24-NOM11 (118)
It should be noted that none of these methods would
adequately protect a coil in the event of power failure.
The safest method of freeze protection is to use glycol
in the proper percent solution for the coldest expected
air temperature.
The manufacturer assumes no responsibility for
undesirable system operation due to improper design,
equipment or component selection, and/or installation of
ductwork, grilles, and other eld supplied components.
ELECTRICAL CONNECTIONS
The unit nameplate lists the unit electrical characteristics
such as the required supply voltage, fan and heater
amperage and required circuit ampacities. The unit-
wiring diagram shows all unit and eld wiring. Since
each project is dierent and each unit on a project may
be dierent, the installer must be familiar with the
wiring diagram and nameplate on the unit BEFORE
beginning any wiring. This unit is not acceptable for
installation in hazardous/explosive areas.
ELECTRICAL ENCLOSURE
The electrical control enclosure provides access to the
electrical compartment. This compartment houses all
electric heat and control components. Terminal strips
are furnished for simple power and control wiring
connections. Multiple knockouts allow wiring entries
from either side of the compartment.
All components furnished for eld installation, by either
the factory or the controls contractor should be located
and checked for proper function and compatibility. All
internal components should be checked for shipping
damage. After installation and before energizing
the unit, verify voltage and check that all electrical
connections are tight. Electrical connetions should be
periodically checked for tightness.
AUXILIARY DRAIN PANS
Mounted directly to the unit drain pan, AUXILIARY
DRAIN PANS may also be secured by the mounting
holes to eld supports or to the unit coil utilizing pipe
hanger wire, plastic ties, or metal strapping.
After the connections are completed, the system should
then be tested for leaks. Since some components are not
designed to hold pressure with a gas, hydronic systems
should be tested with water.
Prior to removing the auxiliary drain pan, make sure
all accessories have been appropriately disconnected
from the auxiliary drain pan. The auxiliary drain pan
can be removed in three steps. First, remove the two
screws that attached the auxiliary drain pan to the
support bracket near the inlet of the unit. Next, support
the weight of the auxiliary drain pan and slide the
auxiliary drain pan towards the discharge of the unit so
the auxiliary drain pan lip will clear the drain pan lip.
After the auxiliary drain pan slides approximately 0.75
inches, the auxiliary drain pan will be free from the
drain pan. Lastly, support the weight of the auxiliary
drain pan and safely lower for servicing. Reinstall prior
to unit startup.
DUCTWORK CONNECTIONS
All ductwork and/or supply and return grilles should
be installed in accordance with the project plans and
specications. If not included on the unit or furnished
from the factory, ENVIRO-TEC supply and return
grilles are available in a variety of types.
Units can be congured from the factory with duct
collars for attaching ductwork. The factory suggests
using galvanized sheet metal ductwork or a exible
canvas attached to the duct collars using sheet metal
screws. Duct connections should follow SMACNA
standards and national and local codes.
All units must be installed in non-combustible areas.
Some models are designed to be connected to duct-work
with a MINIMUM amount of external static pressure.
Consult the approved submittals and the product catalog
for unit external static pressure limitations.
Units provided with outside air for ventilation should
have some form of low temperature protection to
prevent coil freeze-up.
Figure 4: Electrical enclosure

ENVIRO-TEC
8
FORM ET115.24-NOM11 (118)
Any devices such as fan switches or thermostats
that have been furnished from the factory for eld
installation must be wired in strict accordance with the
applicable wiring diagrams. Failure to do so could result
in personal injury or damage to components and will
void all manufacturers’ warranties.
All eld wiring should be done in accordance with
governing codes and ordinances. Any modication of
the unit wiring without factory authorization will result
in voiding of all factory warranties and will nullify any
agency listings.
The manufacturer assumes no responsibility for any
damages and/or injuries resulting from improperly eld
installed or wired components.
This unit is listed to UL/CSAS standards. All
modications to line voltage wiring must be performed
in accordance with the NEC and inspected by ETL to
maintain product listing. Unauthorized modication to
any wiring may impact unit performance and void ETL
listing and/or product warranty.
TELESCOPING BOTTOM PANEL
The telescoping bottom panel allows for fully recessing
the unit while permitting service access into the ceiling
plenum. The architectural ceiling panel is nished with
a durable powder coat paint.
Portions of the inlet louver not directly
below unit inlet may require covering
in the field on applications where
inltration of ceiling plenum air into
space is undesired. Telescoping skirt
and collar assembly must be field
adjusted to assure a proper t between
lter frame and louvered inlet panel
assembly. Refer to assembly submittal
drawings for specic dimensions.

ENVIRO-TEC 9
FORM ET115.24-NOM11 (118)
MODEL HLP HORIZONTAL FAN COIL
Optional Telescoping Bottom Panel Assembly, Typical Installation Instructions
Drawings are subject to change without notice. Refer to www.enviro-tec.com for current submittal drawings.
FHP UNIT CHASSIS
SCREW THE TELESCOPING PANEL TO
THE CHASSIS 2 SCREWS BOTH SIDE
10 1/2"
264
7 [178]
10 1/2 [267]
AIR
OPEN THIS
PANEL FIRST
FINISHED
CEILING LINE
NOTE:
1. All dimensions are inches [millimeters]. All dimensions
±1/4" [6mm]. Metric values are soft conversion.
2. All drawings subject to change without prior notice.
3. Left hand unit shown, right hand unit opposite.
4. Mounting hardware not provided. Mounting holes are
located.
5. Remove solid and louvered bottom panels before mounting
frame assembly.
6. Frame assembly must be installed flat and square. Failure
to do so may result in poor bottom panel fit and improper
airflow pattern. Shim frame to support as required.
7. Telescoping skirt assembly must be field adjusted to
assure close fit to louvered bottom panel.
8. Portions of the inlet louver not directly below unit inlet
may require covering in the field on applications where
infiltration of ceiling plenum air into space is undesired.
TYPICAL INSTALLATION METHODS INLET COLLAR INSTALLATION
SUSPENDED GRID/TILE CEILING SYSTEM
CEILING GRID
"T" BAR
TELESCOPING BOTTOM
PANEL FRAME EXTRUSION
ACOUSTIC FIBRE
CEILING TILE
SOLID OR LOUVERED
BOTTOM PANEL
NOTE: CEILING "T" BAR GRID MAY NOT SUPPORT TELESCOPING
BOTTOM PANEL ASSEMBLY. BOTTOM PANEL ASSEMBLY
MAY REQUIRE INDEPENDENT SUPPORT.
METAL OR WOOD
CEILING STUD
SHIM AS
REQUIRED
TELESCOPING BOTTOM
PANEL FRAME EXTRUSION
SHT MTL OR WOOD
SCREW AS REQUIRED,
SEE NOTES 4 & 6
SOLID OR LOUVERED
BOTTOM PANEL
SHT MTL OR WOOD
SCREW AS REQUIRED,
SEE NOTES 4 & 6
SHIM AS
REQUIRED
DRYWALL
CEILING
STUD/DRYWALL CEILING SYSTEM
TABLE 1: TELESCOPING BOTTOM PANEL WEIGHTS (LBS./KG)
DESCRIPTION UNIT SIZE
02 03 04 06 08 09 10 12
Telescoping bottom panel 10 [5] 11 [5] 12 [5] 14 [6] 16 [7] 17 [8] 20 [9] 21 [10]

ENVIRO-TEC
10
FORM ET115.24-NOM11 (118)
SERVICE AND CLEARANCE REQUIREMENTS
HORIZONTAL, LOW PROFILE EXPOSED UNITS

ENVIRO-TEC 11
FORM ET115.24-NOM11 (118)
ABOVE UNIT
ABOUT PIVOT POINT
CORNER PANELS ROTATE
0"
REQUIRED CLEARANCE
4" [102] MIN
REQUIRED CLEARANCE
BELOW UNIT
0" CLEARANCE BETWEEN UNIT AND STRUCTURE
CORNER PANELS ROTATED 90°
CAN BE LIFTED AND REMOVED
11"[279] MIN
REQUIRED CLEARANCE
BESIDE UNIT
CORNER PANELS
SHOWN ROTATED 90°
UNIT
INSTALLED
HALF
OPENED
FULLY
OPENED
SERVICE AND CLEARANCE REQUIREMENTS: HEIGHT RESTRICTED APPLICATION
HORIZONTAL, LOW PROFILE EXPOSED UNITS

ENVIRO-TEC
12
FORM ET115.24-NOM11 (118)
SERVICE AND CLEARANCE REQUIREMENTS: WIDTH RESTRICTED APPLICATION
3"
[76]
3"
[76]
3" [76] MIN
REQUIRED CLEARANCE
BESIDE UNIT
(PANEL REMOVAL
REQUIRED FOR
ELECTRICAL ACCESS)
CLEARANCE BETWEEN
STRUCTURE AND UNIT
ABIDE BY APPLICABLE
CODES AND STANDARDS
REGUARDING ACCESS
FOR ELECTRICAL OR
PLUMBING COMPONENTS
CORNER PANELS
SHOWN LIFTED AND
ROTATED 5°
LIFT AND ROTATE CORNER PANEL
OFF OF PIVOT POINT
1" [25] MIN
REQUIRED CLEARANCE
ABOVE UNIT
DROP CORNER PANELS
STRAIGHT DOWN
UNIT
INSTALLED
HALF
OPENED
FULLY
OPENED
HORIZONTAL, LOW PROFILE EXPOSED UNITS

ENVIRO-TEC 13
FORM ET115.24-NOM11 (118)
SERVICE AND CLEARANCE REQUIREMENTS: EXTERNAL SPACE REQUIREMENTS
8"
206
8 1/2"
216
OPTIONAL AUXILIRY
DRIP PAN
3"
77
SUPPLY AIR
OPENIG WIDTH
R10 1/2"
264
CONTROL ENCLOSURE
SEE NOTE 9
FRONT VIEW
LH SHOWN RH
OPPOSITE
22"
559
TOP VIEW
NOTES:
1. All chilled water piping that projects beyond the condensate pan or the optional auxiliary drip pan
must be field insulated by others.
2. Auxiliary drip pan shown above is optional, and is mounted on the outlet side of the drain pan.
3. Drain pan is installed with the outlet tube(s) on cooling coil connection end of coil on 4-pipe units with
optional opposite end connection.
4. Dimensions shown on this drawing apply to standard CW and HW valve packages. Refer to the
Piping Package Catalog for valve package code details. Contact factory for details on valve packages
using non-standard or customer furnished components.
5. Provide sufficient clearance to access electrical components and comply with all applicable codes and
ordinances.
HORIZONTAL, LOW PROFILE PLENUM AND FREE RETURN
8 1/2"
216
OPTIONAL AUXILIARY
DRIP PAN
SUPPLY AIR
OPENING WIDTH
10 1/2"
267
AIR FILTER CLEARANCE
8"
204
1"
25
CONTROL ENCLOSURE
SEE NOTE 5
FRONT VIEW
OPTIONAL
SIDE ACCESS
22"
559
TOP VIEW
NOTES:
1. All chilled water piping that projects beyond the condensate pan or the optional auxiliary drip pan
must be field insulated by others.
2. Auxiliary drip pan shown above is optional, and is mounted on the outlet side of the drain pan.
3. Drain pan is installed with the outlet tube(s) on cooling coil connection end of coil on 4-pipe units with
optional opposite end connection.
4. Dimensions shown on this drawing apply to standard CW and HW valve packages. Refer to the
Piping Package Catalog for valve package code details. Contact factory for details on valve packages
using non-standard or customer furnished components.
5. Provide sufficient clearance to access electrical components and comply with all applicable codes and
ordinances.

ENVIRO-TEC
14
FORM ET115.24-NOM11 (118)
SECTION TWO - START-UP
GENERAL
Before beginning any start-up operation, the start-
up personnel should familiarize themselves with the
unit, options and accessories, and control sequence to
understand the proper system operation. All personnel
should have a good working knowledge of general
start-up procedures and have the appropriate start-up
and balancing guides available for consultation.
The initial step in any startup operation should be a nal
visual inspection. All equipment, plenums, duct-work,
and piping should be inspected to verify that all systems
are complete and properly installed and mounted, and
that no debris or foreign articles such as paper or drink
cans are left in the units or other areas. Each unit should
be checked for loose wires, free blower wheel operation,
and loose or missing access panels or doors. Except as
required during start-up and balancing operations, no
fan coil units should be operated without all the proper
ductwork attached, supply and return grilles in place,
and all access doors and panels in place and secure.
A clean lter of the proper size and type must also be
installed. Failure to do so could result in damage to the
equipment or building and furnishings, and/or void all
manufacturers’ warranties.
Fan coils are not intended for temporary heat/cool
or ventilation. Units are not designed or equipped to
operate in dusty construction environments. Operation
of the units in conditions outlined above could result in
damage to the equipment or building and furnishings
and/or void all manufacturer’s warranties.
COOLING/HEATING SYSTEM
Prior to the water system start-up and balancing, the
chilled/hot water systems should be ushed to clean
out dirt and debris, which may have collected in the
piping during construction. During this procedure,
all unit service valves must be in the closed position.
This prevents foreign matter from entering the unit and
clogging the valves and metering devices. Strainers
should be installed in the piping mains to prevent this
material from entering the units during normal operation.
During system filling, air venting from the unit is
accomplished by the use of the standard manual, or
optional automatic, air vent tting installed on the coil.
In the case of the manual air vent tting, the screw
should be turned counterclockwise no more than 1-½
turns to operate the air vent. Automatic air vents may
be unscrewed one turn counterclockwise to speed
initial venting but should be screwed in for automatic
venting after start-up operations. Check to ensure that
no leaks are prevalent at the coils, coil connections,
piping packages, etc.
The air vent provided on the unit is not
intended to replace the main system air
vents and may not release air trapped
in other parts of the system. Inspect
the entire system for potential air
traps and vent those areas as required,
independently. In addition, some
systems may require repeated venting
over a period of time to properly
eliminate air from the system.
AIR SYSTEM BALANCING
All duct-work must be complete and connected, and all
grilles, lters, access doors and panels must be properly
installed to establish actual system operating conditions
BEFORE beginning air balancing operations.
Each individual unit and attached duct-work is a unique
system with its own operating characteristics. For this
reason, air balancing is normally done by balance
specialists who are familiar with all procedures required
to properly establish air distribution and fan system
operating conditions. These procedures should not be
attempted by unqualied personnel. Some selections
may require air balancing in the eld.
After the proper system operation is established,
the actual unit air delivery and the actual fan motor
amperage draw for each unit should be recorded in
a convenient place for future reference such as the
inspection, installation, & start-up check sheet, a copy
of which is provided on the back of this manual. Contact
the Sales Representative or the factory for additional
copies of this sheet.

ENVIRO-TEC 15
FORM ET115.24-NOM11 (118)
MOTOR AND FAN DATA
TABLE 2A: PSC MOTORS, MODEL HLP, HLE
UNIT
SIZE
PSC MOTOR HP
(QTY) # OF FANS FAN SPEED WATTS2115 VOLTS 208/230 VOLTS 277 VOLTS
AMPS1AMPS1AMPS1
02 (1) 1/2031
High 55
0.6 N/A N/AMedium 40
Low 36
03 (1) 1/2031
High 61
0.6 N/A N/AMedium 45
Low 40
04 (1) 1/20 2
High 75
0.8 0.4 0.5Medium 65
Low 58
06 (1) 1/20 2
High 80
0.8 0.4 0.5Medium 68
Low 56
08 (1) 1/10 2
High 122
1.1 0.6 0.5Medium 83
Low 66
09 (1) 1/10 2
High 127
1.1 0.6 0.5Medium 86
Low 66
10 (2) 1/20 4
High 148
1.6 0.8 1Medium 128
Low 110
12 (2) 1/20 4
High 160
1.6 0.8 1Medium 139
Low 115
TABLE 2B: PSC MOTORS, MODEL HLF
UNIT
SIZE
PSC MOTOR HP
(QTY) # OF FANS FAN SPEED WATTS2115 VOLTS 208/230 VOLTS 277 VOLTS
AMPS1AMPS1AMPS1
02 (1) 1/2031
High 55
0.6 N/A N/AMedium 40
Low 36
03 (1) 1/2031
High 61
0.6 N/A N/AMedium 45
Low 40
04 (1) 1/20 2
High 75
0.8 0.4 0.5Medium 65
Low 58
06 (1) 1/10 2
High 121
1.1 0.6 0.5Medium 84
Low 66
08 (1) 1/6 2
High 224
2.1 1.1 0.9Medium 140
Low 66
09 (1) 1/6 2
High 230
2.1 1.1 0.9Medium 139
Low 67
10 (2) 1/10 4
High 226
2.2 1.2 1Medium 154
Low 128
12 (2) 1/10 4
High 248
2.2 1.2 1
Medium 171
Low 133
NOTES:
1. Motor electrical data is nameplate data.
2.WattsarebasedonanHLPwithPSCmotor,3rowcoil,12FPI,1"throwawaylter,0.05"ESPat115V.
3. PSC motors are not available in 208-277V on SZ02 and SZ03.
4. Motor data is subject to change and should not be used for submittal purposes. Refer to Web-Select submittal for actual ratings.
NOTES:
1. Motor electrical data is nameplate data.
2.WattsarebasedonanHLFwithPSCmotor,3rowcoil,12FPI,1"throwawaylter,0.05"ESPat115V.
3. PSC motors are not available in 208-277V on SZ02 and SZ03.
4. Motor data is subject to change and should not be used for submittal purposes. Refer to Web-Select submittal for actual ratings.

ENVIRO-TEC
16
FORM ET115.24-NOM11 (118)
WATER SYSTEM BALANCING
A complete knowledge of the hydronic system, its
components, and controls is essential to proper water
system balancing and this procedure should not be
attempted by unqualied personnel. The system must
be complete and all components must be in operating
condition BEFORE beginning water system balancing
operations.
Each hydronic system has different operating
characteristics depending on the devices and controls
in the system. The actual balancing technique may vary
from one system to another.
After the proper system operation is established, the
appropriate system operating conditions such as various
water temperatures and ow rates should be recorded
in a convenient place for future reference.
Before and during water system balancing, conditions
may exist which can result in noticeable water noise
or undesired valve operation due to incorrect system
pressures. After the entire system is balanced, these
conditions will not exist on properly designed systems.
CONTROLS OPERATION
Before proper control operation can be veried all other
systems must be in proper operation. The correct water
and air temperatures must be present for the control
function being tested. Some controls and features are
designed to not operate under certain conditions.
A wide range of controls and electrical options and
accessories may be used with the equipment covered
in this manual. Consult the approved unit submittals,
order acknowledgement, and other manuals for detailed
information regarding each individual unit and its
controls. Since controls and features may vary from
one unit to another, care should be taken to identify
the controls to be used on each unit and their proper
control sequence. Information provided by component
manufacturers regarding installation, operation, and
maintenance of their individual controls is available
upon request.
TABLE 3: EC MOTORS
UNIT
SIZE
FAN
SPEED
EC MOTOR
HP (QTY)
# OF
FANS
WATTS2
(STD/HS)
AMPS1,3
115 VOLTS 208/230 VOLTS 277 VOLTS
3-SPEED
(STD/HS) 2-10VDC 3-SPEED (STD/HS) 2-10VDC 3-SPEED (STD/HS) 2-10VDC
02
High
(1) 1/4 1
32 / 45
0.7 / 1.0 0.9 0.5 / 0.6 0.5 0.4 / 0.5 0.5Medium 21 / 36
Low 14 / 26
03
High
(1) 1/4 1
35 / 59
1.0 / 1.5 1.1 0.6 / 0.9 0.7 0.5 / 0.8 0.6Medium 23 / 43
Low 16 / 33
04
High
(1) 1/4 2
50 / 75
1.5 / 1.8 1.2 0.9 / 1.1 0.8 0.8 / 0.9 0.6Medium 33 / 56
Low 21 / 41
06
High
(1) 1/4 2
104 / 132
2.6 / 3.1 2.0 1.6 / 1.9 1.2 1.3 / 1.6 1.0Medium 62 / 89
Low 36 / 62
08
High
(1) 1/4 2
91 / 122
2.3 / 2.9 2.0 1.4 / 1.7 1.2 1.2 / 1.5 1.0Medium 54 / 90
Low 31 / 62
09
High
(1) 1/4 2
119 / 182
3.7 / 4.5 2.7 2.3 / 2.7 1.6 1.9 / 2.3 1.4Medium 72 / 116
Low 39 / 77
10
High
(2) 1/4 4
142 / 207
3.9 / 5.1 3.1 2.3 / 3.1 1.9 2.0 / 2.6 1.6Medium 91 / 139
Low 54 / 104
12
High
(2) 1/4 4
143 / 209
3.2 / 4.5 3.5 2.0 / 2.7 2.1 1.6 / 2.3 1.8Medium 92 / 152
Low 56 / 105
NOTES:
1. Motor electrical data is nameplate data.
2.WattsarebasedonanHLPwith3-speedECmotor,3rowcoil,12FPI,1"throwawaylter,0.05"ESPat115V.
3. For neutral conductor sizing, multiply AMPS by 1.73.
4. Motor data is subject to change and should not be used for submittal. Refer to unit submittal for actual ratings.

ENVIRO-TEC 17
FORM ET115.24-NOM11 (118)
SECTION THREE - NORMAL OPERATION & PERIODIC MAINTENANCE
FAN DECK
The fan assembly is easily removed from the unit
without disconnecting the ductwork for service access
to motors and blowers at, or away from the unit.
Should the assembly require more extensive service,
the motor/ blower assembly may be removed from the
unit to facilitate such operations as motor or blower
wheel/housing replacement, etc. Dirt and dust should
not be allowed to accumulate on the blower wheel or
housing. This can result in an unbalanced blower wheel
condition that can damage a blower wheel or motor.
The wheel and housing may be cleaned periodically
using a vacuum cleaner and a brush taking care not to
dislodge the factory balancing weights on the blower
wheel blades.
GENERAL
Each unit on a job will have its own unique operating
environment and conditions that may dictate a
maintenance schedule for that unit that is dierent
from other equipment on the job. A formal schedule of
regular maintenance and an individual unit log should
be established and maintained. This will help to achieve
the maximum performance and service life of each unit
on the job.
Information regarding safety
precautions contained in the preface
at the beginning of this manual should
be followed during any service and
maintenance operations.
For more detailed information concerning service
operations, consult your Sales Representative or the
Factory.
MOTOR/BLOWER ASSEMBLY
The type of fan operation is determined by the control
components and their method of wiring, and may vary
from unit to unit. Refer to the wiring diagram for each
unit for that unit’s individual operating characteristics.
Motors are permanently lubricated, PSC or EC type and
do not require eld lubrication.
Figure 6a-6c: Fan deck removal
Figure 6a
Figure 6b
Figure 6c
Figure 5a-5b: Bottom panel removal
Figure 5a
Figure 5b

ENVIRO-TEC
18
FORM ET115.24-NOM11 (118)
COIL
Coils may be cleaned in place by removing the motor/
blower assemblies and brushing the entering air face
between ns with a soft brush parallel to ns. Do not
brush perpendicular to n orientation as damage may
occur. Brushing should be followed by cleaning with a
vacuum cleaner. If a compressed air source is available,
the coil may also be cleaned by blowing air through the
coil ns from the leaving air face. Vacuuming should
again follow this. Units provided with the proper type
of air lters, replaced regularly, may require periodic
coil cleaning.
ELECTRIC RESISTANCE HEATER ASSEMBLY
Electric resistance heaters typically require no normal
periodic maintenance when unit air lters are changed
properly. Other conditions and equipment may aect the
operation and service life in the system. The two most
important operating conditions for an electric heater are
proper airow and proper supply voltage. High supply
voltage and/or poorly distributed or insucient airow
over the element will result in element overheating. This
condition may result in the heater cycling on the high
limit thermal cutout. Open wire type heaters provided
have an automatic reset switch with a back-up high
limit thermal switch. Automatic reset switches are as
the name implies; they reset automatically after the
heater has cooled down. The high limit thermal cutout
device is a manual reset safety device. With proper
unit application and during normal operation, the high
limit thermal cutout will not operate. This device only
operates when some problem exists. ANY condition
that causes high limit cutout MUST be corrected
immediately. Once the high limit trips, it may be reset
once the unit has cooled down. Refer to troubleshooting
section for high limit reset instructions. High supply
voltage also causes excessive amperage draw and may
result in tripping of the circuit breaker or blowing of
the fuses on the incoming power supply.
ELECTRICAL WIRING & CONTROLS
The electrical operation of each unit is determined by
the components and wiring of the unit and may vary
from unit to unit. Consult the wiring diagram for the
actual type and number of controls provided on each
unit. The integrity of all electrical connections should be
veried at least twice during the rst year of operation.
Afterwards, all controls should be inspected regularly
for proper operation. Some components may experience
erratic operation or failure due to age. Wall thermostats
may also become clogged with dust and lint and should
be periodically inspected and cleaned to provide reliable
operation.
When replacing any components such as fuses,
contactors, or relays, use only the exact type, size, and
voltage component as furnished from the factory. Any
deviation without factory authorization could result
in personnel injury or damage to the unit and will
void all factory warranties. All repair work should be
done in such a manner as to maintain the equipment in
compliance with governing codes and ordinances or
testing agency listings.
More specific information regarding the use and
operating characteristics of the standard controls oered
by this manufacturer is contained in other manuals.
VALVES & PIPING
No formal maintenance is required on the valve package
components most commonly used with fan coil units
other than a visual inspection for possible leaks in the
course of other normal periodic maintenance. In the
event that a valve should need replacement, the same
precautions taken during the initial installation to protect
the valve package from excessive heat should also be
used during replacement. If a strainer is ordered with
the unit the strainer must be cleaned periodically along
with other scheduled maintenance. In some cases, the
valve actuator may fail and usually can be replaced
without removing valve body from piping.