Enviro VFC, VFE, VFS Installation & Operation Manual
SERIES B VERTICAL FLOOR
B Y JOHNSON C O NTROL S
FAN COIL UNIT
InstallatIon, operatIon & MaIntenance
New Release
MODEL VFC/VFE/VFS
Form ET115.24-NOM9 (908)
FORM ET115.24-NOM9 (908)
TABLE OF CONTENTS
TABLE OF CONTENTS .................................................................................................................2
SAFETY SYMBOLS ......................................................................................................................3
SAFETY CONSIDERATIONS ........................................................................................................4
SECTION 1 - RECEIPT & INITIAL INSTALLATION ......................................................................5
VF SERIES B FEATURES ......................................................................................................................5
PREFACE ................................................................................................................................................5
UNPACKING & INSPECTION ...............................................................................................................6
HANDLING & INSTALLATION ..............................................................................................................6
COOLING/HEATING MEDIUM CONNECTIONS ...................................................................................7
DUCTWORK CONNECTIONS ...............................................................................................................9
ELECTRICAL CONNECTIONS .............................................................................................................9
SECTION 2 - START-UP .............................................................................................................10
GENERAL ............................................................................................................................................10
COOLING/HEATING SYSTEM ............................................................................................................10
AIR SYSTEM BALANCING .................................................................................................................10
WATER SYSTEM BALANCING ..........................................................................................................10
CONTROLS OPERATION ...................................................................................................................11
MOTOR AND FAN DATA ......................................................................................................................11
EXAMPLE WIRING DIAGRAMS ..........................................................................................................12
SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCE ........................................14
GENERAL ............................................................................................................................................14
MOTOR/BLOWER ASSEMBLY ...........................................................................................................14
COIL .....................................................................................................................................................14
ELECTRIC RESISTANCE HEATER ASSEMBLY ................................................................................14
FAN DECK ............................................................................................................................................14
ELECTRICAL WIRING & CONTROLS ................................................................................................14
VALVES & PIPING ................................................................................................................................15
FILTERS, THROWAWAY .....................................................................................................................15
REPLACEMENT PARTS .....................................................................................................................15
FALSE BACK ASSEMBLY ...................................................................................................................16
SUB BASE ASSEMBLY AND LEVELING LEGS .................................................................................17
SECTION 4 - INSPECTION, INSTALLATION & START-UP CHECKLIST ..................................18
SECTION 5 - DIMENSIONAL DRAWINGS..................................................................................19
MODEL VFC - CONCEALED FAN COIL UNIT ....................................................................................19
MODEL VFE - EXPOSED FAN COIL UNIT W/ STAMPED SUPPLY GRILLE .....................................20
MODEL VFS - EXPOSED SLOPE TOP FAN COIL UNIT W/ STAMPED SUPPLY AIR GRILLE ........21
MODEL VF - OUTSIDE AIR INLET LOCATION ...................................................................................22
MODEL VFC - STANDARD DECORATOR WALL PANEL W/ STAMPED
RETURN AIR GRILLE ..........................................................................................................................23
MODEL VFC - STANDARD DECORATOR WALL PANEL W/ STAMPED
SUPPLY & RETURN AIR GRILLE ........................................................................................................24
MODEL VF - OUTSIDE AIR WALL BOX ASSEMBLY .........................................................................25
MODEL VFE/VFS - STAMPED LOUVER RETURN AIR GRILLE ........................................................26
MODEL VFE - EXPOSED FAN COIL UNIT W/ STAMPED SUPPLY GRILLE &
10” END POCKET EXTENSION ..........................................................................................................27
MODEL VF - ELECTRIC ENTRY & PIPING WALL PENETRATION LOCATIONS .............................28
2
JOHNSON CONTROLS
FORM ET115.24-NOM9 (908)
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to areas of potential hazard:
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.
CAUTION identies 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.
JOHNSON CONTROLS
3
SAFETY CONSIDERATIONS
FORM ET115.24-NOM9 (908)
The equipment covered by this manual is designed for
safe and reliable operation when installed and operated
within its design specication limits. To avoid personal
injury or damage to equipment or property while
installing or operating this equipment, it is essential
that qualied, 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
dismemberment injuries.
HOT PARTS HAZARDS. 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.
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.
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 ammable materials
when brazing, Use ame and heat protection barriers where needed. Have
re extinguisher available and ready
for immediate use.
Check that the unit assembly and component weights can be safely supported
by rigging and lifting equipment.
4
JOHNSON CONTROLS
FORM ET115.24-NOM9 (908)
(Provided with unit mounted t-stat)
SECTION 1 - RECEIPT & INITIAL INSTALLATION
VF SERIES B 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.
LD13943
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.
JOHNSON CONTROLS
5
FORM ET115.24-NOM9 (908)
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.
Never pressurize any equipment beyond specied 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 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 veried 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 led as before. 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 notied 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.
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.
6
JOHNSON CONTROLS
FORM ET115.24-NOM9 (908)
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 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.
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 effects 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 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.
The unit's drain pan is factory sloped
toward the drain connection when the
unit is installed level and plumb.
If equipped with optional leveling legs, the legs can
be adjusted with a wrench before anchoring the unit
in place.
The type of mounting device is a matter of choice,
however the mounting point should always be that
provided in the chassis, or cabinet. Refer to the unit
product drawing for mounting hole location and
sizes.
If equipped with optional falseback spacers or subbases,
these accessories must rst be assembled and mounted
to the unit before anchoring.
After mounting the unit, it is then ready for the various
service connections such as water, drain and electrical.
At this time it should be veried that the proper types
of service are actually provided to the unit.
On those units requiring chilled water and/or hot water,
the proper line size and water temperature should be
available to the unit. In the case of refrigerant cooling,
the proper line size and refrigerant type should be
available at the unit. The auxiliary drain pan is shipped
loose for eld installation. See the Auxiliary Drain Pan
Installation Details for instructions (next page). On
units with steam heating coils, the proper line sizing
and routing should be veried and 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.
Vertical units are designed to be oor mounted or
otherwise supported from below and bolted to the wall
structure through the mounting holes provide in the
chassis. Vertical concealed units are designed to be
oor mounted or otherwise supported from below and
may be anchored directly through the cabinet back.
Units with leveling legs must be anchored through the
cabinet back.
JOHNSON CONTROLS
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. Special consideration must be given to system
cleanliness when connecting to solar,
domestic or potable water systems.
7
FORM ET115.24-NOM9 (908)
UPPER SUPPORT TABS
FLOAT SWITCH MOUNT
SEE NOTE 4
SEE NOTE 4
LOWER SUPPORT
TABS
SECTION A-A
NOTE:
INSTALLING CONTRACTOR MUST ASSURE
THAT THE CONNECTED DRAIN PIPING
MAINTAINS THE PROPER PAN ORIENTATION.
NOTES:
1. BEND LOWER SUPPORT TABS DOWN 90º.
2. BEND UPPER SUPPORT TABS UP 90º.
3. POSITION DRAIN PAN IN PLACE AND THEN BEND UPPER SUPPORT TABS DOWN UNTIL PAN IS SECURE.
4. BEND FLOAT SWITCH MOUNT OUT 90º IF NEEDED.
5. STANDARD PAN SHOWN, TYPICAL FOR EXTENDED PAN.
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
documentation may be found at www.enviro-tec.com.
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.
In the case of eld installed valves and piping, the
chilled water valve cluster (or expansion valve 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.
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.
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 notied BEFORE any repairs are attempted.
All leaks should be repaired before proceeding with
the installation.
8
LD13944
JOHNSON CONTROLS
FORM ET115.24-NOM9 (908)
After system integrity has been established the piping
should be insulated in accordance with the project
specications. ALL chilled water piping and valves or
refrigerant suction piping not located over drain pans
must be insulated to prevent damage from sweating.
This includes factory and eld piping inside the unit
cabinet.
The drain should always be connected and piped to an
acceptable disposal point. For proper moisture carry-
off, the drain piping should be sloped away from the
unit at least 1/8" per foot. A drain trap may be required
by local codes and it is strongly recommended for odor
containment.
DUCTWORK CONNECTIONS
All ductwork and/or supply and return grilles should
be installed in accordance with the project plans and
specications. If not included on the unit or furnished
from the factory, supply and return grilles should be
provided as recommended in the product catalog.
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.
These units may be damaged by operation without the
proper ductwork connected. 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.
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.
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 unitwiring diagram shows all unit and eld wiring. Since
each project is different and each unit on a project may
be different, the installer must be familiar with the
wiring diagram and nameplate on the unit BEFORE
beginning any wiring. 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 and all electrical
connections should be tightened to minimize problems
during start-up.
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.
The fan motor(s) should never be controlled by any
wiring or device other than the factory furnished
switch, thermostat/switch combination, without factory
authorization.
All eld wiring should be done in accordance with
governing codes and ordinances. Any modication 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.
The manufacturer assumes no responsibility for
undesir able sy stem op eration due to improper
design, equipment or component selection, and/or
installation of ductwork, grilles, and other eld supplied
components.
JOHNSON CONTROLS
9
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