Enviro CFR0404, CFR0506, CFR0504, CFR0604, CFR0606 User Manual
...
December, 2005 • Part No. PX-00-0005
Features and Benefits............................................................................................................................2
Construction Features ...........................................................................................................................4
Application and Selection .....................................................................................................................6
Primary Airflow Calibration ...................................................................................................................9
Dimensional Data.................................................................................................................................10
General Selection Data (Standard PSC Motor) .....................................................................................12
Sound Power Data ...............................................................................................................................14
Fan Performance Data (Standard PSC Motor) ......................................................................................16
ECM™ Fan Motor Option .....................................................................................................................18
General Selection Data ...................................................................................................................19
Fan Performance Data ....................................................................................................................20
ARI Ratings...........................................................................................................................................21
Electric Heat .........................................................................................................................................22
Hot Water Coil Data.............................................................................................................................23
Guide Specifications.............................................................................................................................30
Standard and Optional Features ..........................................................................................................32
CFR • TABLE OF CONTENTS
2
CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
©December, 2005 Environmental Technologies, Inc.
6750 Bryan Dairy Rd. • Largo, FL 33777
Stock ID: CAT-CFR • Part No. PX-00-0005
Model CFR is Designed for
QUIET
, EFFICIENT COMFORT
Model CFR fan terminals are specifically designed for quiet operation.
They also offer improved space comfort and flexibility for a wide variety
of HVAC systems. This is critical in
today’s buildings, where
occupants are placing more emphasis on indoor acoustics.
Occupant-Sensitive Design
Due to heightened interest in
Indoor Air Quality, many HVAC
system designers are focusing on
the effects of particulate contamination within a building’s occupied
space. Often, HVAC system noise
is overlooked as a source of occupied space contamination. The CFR
terminal is specifically designed
to eliminate obtrusive fan noise from
reaching the occupants, while providing constant air motion in the
space.
Occupants will benefit from the CFR
design that minimizes low frequency (125Hz-250Hz) sound levels
that typically dominate the space
sound level. The CFR also minimizes
the fluctuation in sound levels that
occur during VAV damper modulation.
For the Building Designer:
FLEXIBILITY
Selection and Layout. The CFR pro-
vides flexibility in system design.
Reduced noise at the fan terminal
allows the system designer to place
properly sized units directly above
occupied spaces. It is not necessary to use the crowded space
above a hall or corridor to locate
the equipment. This will reduce
lengthy and expensive discharge
duct runs. The standard shallow casing height (14" up to 1000 CFM)
minimizes conflict with other systems competing for ceiling space.
The FlowStar
TM
sensor ensures accurate control, even when space
constraints do not permit long
straight inlet duct runs to the terminal.
Sizes. Model CFR terminals are
available in nine fan sizes to handle airflow capacities between 100
and 4800 CFM. Most fan sizes are
available with three primary air valve
sizes to optimize the unit fan and
primary air valve combinations
required by current industry needs.
An ENVIRO-TEC
®
Windows®based
Computer Selection Program is
available on CD-ROM to facilitate
the selection process. Contact
your ENVIRO-TEC
®
representative to
obtain a copy of this powerful
and time-saving program.
F
EATURES AND BENEFITS
GENERAL NOTES
• All data herein is subject to change without notice. Some drawings are not shown in this catalog.
Refer to www.enviro-tec.com for current catalog and submittal drawings.
• Drawings not for installation purposes; refer to IOM manual at www.enviro-tec.com.
• Construction drawings and performance data contained herein should not be used for submittal purposes.
• ETL Listing Number 476203.
FEATURES AND BENEFITS • CFR
©May, 2006 Environmental Technologies, Inc. • CFR Catalog
3
For the Contractor:
CONVENIENCE
Quality. All CFR terminals are thor-
oughly inspected during each step
of the manufacturing process,
including a comprehensive “pre-ship”
inspection, to assure the highest quality product available. Each unit is
also “run tested” before leaving the
factory to ensure trouble free field
“start-up.”
Quick Installation. A standard
single point electrical main power
connection is provided. Electronic controls and electrical
components are located on the
same side of the casing for quick
access, adjustment, and troubleshooting. Installation time is
minimized with the availability of
factory calibrated ENVIRO-TEC
®
controls.
Finite fan speed adjustment is
accomplished with an electronic SCR
controller. The SCR fan speed controller is manufactured by
ENVIRO-TEC
®
and is compatible
with the fan motor. This minimizes
electronic interference and harmonic distortion that occurs from
non-compatible motor and SCR
components. Increased motor life
and efficiency result from the
compatible design.
CFR terminals utilize three tap
motors that accommodate a broad
range of flow and static pressure
field conditions while dramatically increasing efficiency.
The FlowStar
TM
sensor ensures accurate airflow measurement, regardless
of the field installation conditions.
A calibration label and wiring diagram is located on the terminal for
quick reference during start-up.
The terminal is constructed to
allow installation with standard
metal hanging straps. Optional
hanger brackets for use with allthread support rods or wire hangers
are also available.
For the Owner:
V
ALUE AND SECURITY
Quality. All metal components are
fabricated from galvanized steel.
Unlike most manufacturers’ terminals, the steel used in the CFR
is capable of withstanding a 125
hour salt spray test without showing any evidence of red rust.
Energy Efficiency. In addition to
quiet and accurate temperature control, the building owner will benefit
from lower operating costs. The
highly amplified velocity pressure
signal from the FlowStar
TM
inlet sensor allows precise airflow control
at low air velocities.
The FlowStar
TM
sensor’s airfoil shape
provides minimal pressure drop
across the terminal. This allows the
central fan to run at a lower pressure and with less brake horsepower.
Energy efficient three tap, three
winding, permanent split capacitor fan motors are manufactured
to ensure efficient, quiet, reliable,
and low maintenance operation.
Three tap motors provide superior energy efficiency over single
speed motors by delivering three
separate horsepower outputs. For
example, a nominal 1/2 HP motor
delivers 1/3 HP on medium tap and
1/4 HP on low tap. This allows
the motor to operate at a higher
efficiency when at a reduced fan
capacity.
Fan terminals that utilize a single
speed motor must rely solely on an
SCR controller to obtain the reduction in fan capacity. At minimum
turndown, they suffer from excessive power consumption and high
motor winding temperatures, significantly reducing the motor life.
As an option, Model CFR is available with an ECM™ fan motor,
providing efficiency ratings between
70% and 80% for most applications.
Agency Certification. Model CFR
terminals, including those with
electric heat, are listed with ETL as
an assembly, and bear the ETL
label.
CFR terminals comply with applicable NEC requirements, are tested
in accordance with ARI Standard
880, and are certified by ARI.
Maintenance and Service. CFR fan
terminals require no periodic maintenance other than optional filter
replacement. If component replacement becomes necessary, the unit
is designed to minimize field labor.
The bottom casing panels can be
removed to provide easy access to
the fan assembly, and the motor
electrical leads are easily unplugged.
Controls. Model CFR terminals are
available with analog electronic, consignment DDC, and pneumatic
controls. ENVIRO-TEC
®
manufactures a complete line of analog
electronic controls specifically
designed for use with CFR terminals. These controls are designed
to accommodate a multitude of
control schemes.
From the most basic to the most
sophisticated sequence of operation, the controls are designed by
experts in VAV terminal operation.
Refer to the Electronic Controls
Selection Guide, and the Pneumatic Controls Selection Guide for
a complete description of the
sequences and schematic drawings
that are available.
Standard features include the
patented FlowStar
TM
airflow sensor,
ETL Listing, NEMA 1 enclosure, 24
volt control transformer, floating
modulating actuator, brass balancing tees and plenum rated
tubing.
CFR • CONSTRUCTION FEATURES
4
CFR Catalog • ©May, 2006 Environmental Technologies, Inc.
Model CFR
The CFR terminal incorporates many unique features. Most of these standard
features are expensive options for other manufacturers.
Integral discharge collar
simplifies field installation
All unit configurations
listed with ETL for
safety compliance
Product label includes
tagging, airflow, and
electrical information
Mechanical lock construction
ensures lowest possible
casing leakage
Full bottom removable
access panels
Low leakage damper incorporates
closed cell foam gasket
Roll formed inlet collar with integral
stiffening ribs adds strength and rigidity
Patented FlowStar
TM
airflow sensor
(Patent #5,481,925)
Galvanized steel casing withstands 125
hour salt spray test per ASTM B-117
Mechanically fastened
insulation for added
security
3/4" thick, 4lb/ft
3
skin,
dual density insulation
complying with UL 181
and NFPA 90A
Fan assembly utilizes a forward curved,
dynamically balanced, galvanized wheel
with a direct drive motor
Electrical devices
installed within a
NEMA 1enclosure,
with single point
power connection
Optional Construction Features
• ECM™ fan motor
• Mounting brackets to accept all-thread hanging rods or wire hangers
• Double wall construction
• Scrim reinforced foil faced insulation meeting ASTM C1136 for mold, mildew, and humidity resistance
• Filter located at induction inlet
• Hot water (CFR-WC), steam, or electric heating coils (CFR-EH) mounted at unit discharge. Access plate upstream
of hydronic coil is standard.
• Low temperature construction for use in thermal storage applications. Includes thermally isolated primary air
inlet and composite damper shaft.
• Factory control options: analog electronic, DDC electronic, pneumatic
• Factory piping packages (refer to Piping Packages catalog, Stock ID CAT-PIPING)
• Induction inlet gravity damper reduces radiated NC level by up to 2 NC at full cooling condition.
CONSTRUCTION FEATURES • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog
5
Each pressure input signal is routed
to the center averaging chamber
Equal concentric circular areas
Sizes 6 & 8: 3 Circles
Sizes 10 & 12: 4 Circles
Sizes 14 & 16: 5 Circles (shown)
Total pressure measured at the center
of each concentric circle for maximum
accuracy, as outlined in ASHRAE
Fundamentals Handbook.
Sizes 6 & 8: 12 Sensing Points
Sizes 10 & 12: 16 Sensing Points
Sizes 14 & 16: 20 Sensing Points
Brass field pressure
measuring tap
Airfoil shaped
averaging
chamber for low
pressure loss
and noise
Pressure output is
routed behind
probe to minimize
pressure loss
and noise
Accurate and Energy-Saving Airflow Control
With The Patented FlowStar™ Sensor
Many VAV terminals waste energy due to an inferior airflow
sensor design that requires the
minimum CFM setpoint to be
much higher than the IAQ calculation requirement. This is
common with interior spaces
that will be effected year round.
These inferior VAV terminals waste
energy in several ways. First, the
primary air fan (e.g. AHU) supplies
more CFM than the building
requires. The higher minimum
CFM setpoint overcools the zone
with VAV terminals without integral heat. To maintain thermal
comfort a building engineer would
need to change the minimum setpoint to zero CFM compromising
indoor air quality. Inferior VAV
terminals with integral heat provide adequate comfort in the
space but waste significant energy as energy is consumed to
mechanically cool the primary
air only to have more energy
consumed to heat the cooled
primary air. Significant energy savings is obtained with proper
sizing and by making sure
approved VAV terminals are capable of controlling at low CFM
setpoints, providing the minimum ventilation requirement.
Currently, most DDC controllers
have a minimum differential pressure limitation between 0.015" and
0.05" w.g. The major DDC man-
ufacturers can control down to
0.015" w.g. An airflow sensor that
does not amplify, e.g., a Pitot tube,
requires about 490 FPM to develop 0.015" w.g. differential
pressure. The FlowStar develops
0.015" w.g. pressure with only 290
FPM on a size 6 terminal and less
than 325 FPM for a size 16. Consequently, VAV terminals utilizing
a non-amplifying type sensor
could have minimum CFM's that
are well over 50% higher than an
ENVIRO-TEC terminal. Many airflow sensors provide some degree
of amplification simply due to the
decrease in free area of the inlet
from large area of the sensor.
These VAV terminals still require
minimum CFM's up to 30% higher than an ENVIRO-TEC terminal,
have higher sound levels, and
higher pressure drop requiring
additional energy consumption at
the primary air fan.
A VAV system designed with
ENVIRO-TEC terminals consumes significantly less energy
than a comparable system with
competitor's terminals. The
FlowStar airflow sensor reduces
energy consumption by allowing
lower zone minimum CFM setpoints, greatly reducing
or eliminating “reheat”, and by
imposing less resistance on the
primary air fan.
The ENVIRO-TEC®air valve features the FlowStar™ airflow sensor which has brought new
meaning to airflow control accuracy. The
multi-axis design utilizes between 12 and
20 sensing points that sample total
pressure at center points within equal
concentric cross- sectional areas, effectively
traversing the air stream in two planes. Each
distinct pressure reading is averaged within the center chamber before exiting the
sensor to the controlling device.
This sensor adds a new dimension to
signal amplification. Most differential
pressure sensors provide a signal between
.5 and 2 times the equivalent velocity
pressure signal. The FlowStar™ provides
a differential pressure signal that is 2.5 to
3 times the equivalent velocity pressure
signal. This amplified signal allows more
accurate and stable airflow control at low
airflow capacities. Low airflow control is
critical for indoor air quality, reheat
minimization, and preventing over cooling during light loads.
Unlike other sensors which use a large
probe surface area to achieve signal
amplification, the FlowStar™ utilizes an
unprecedented streamline design which
generates amplified signals unrivaled in the
industry. The streamlined design also
generates less pressure drop and noise.
The VAV schedule should specify the
minimum and maximum airflow setpoints,
maximum sound power levels, and
maximum air pressure loss for each terminal.
The specification for the VAV terminal must
detail the required performance of the
airflow sensor. For maximum building
occupant satisfaction, the VAV system
designer should specify the airflow sensor
as suggested in the Guide Specifications
of this catalog.
FlowStar™ Airflow Sensor
Patent #5,481,925
CFR • APPLICATION AND SELECTION
6
CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
PURPOSE OF SERIES FLOW
FAN TERMINALS
Series flow fan powered terminals offer improved space comfort
and flexibility in a wide variety of
applications. Substantial operating savings can be realized through
the recovery of waste heat, reduced
central fan horsepower requirements and night setback operation.
Heat Recovery. The CFR recovers
heat from lights and core areas to
offset heating loads in perimeter
zones. Additional heat is available
at the terminal unit using electric,
steam, or hot water heating coils.
Controls are available to energize
remote heating devices such as wall
fin, fan coils, radiant panels, and
roof load plenum unit heaters.
IAQ. The CFR enhances the indoor
air quality of a building by providing
constant air motion, and higher air
volumes in the heating mode than
typically provided by straight VAV
single duct terminals or parallel flow
fan terminals. The higher air
capacity provides continuous air
motion in the space and lowers the
heating discharge air temperature.
This combination improves air circulation, preventing accumulation
of CO
2
concentrations in stagnant
areas. Increased air motion
improves occupant comfort. The
higher air capacity also improves
the performance of diffusers and
minimizes diffuser “dumping”.
ACOUSTICAL CONCEPTS
The focus on indoor air quality is
also having an effect on proper
selection of air terminal equipment with respect to acoustics.
Sound. At the zone level, the
terminal unit generates acoustical
energy that can enter the zone along
two primary paths. First, sound from
the unit fan can propagate through
the downstream duct and diffusers
before entering the zone (referred
to as Discharge or Airborne Sound).
Acoustical energy is also radiated
from the terminal casing and travels through the ceiling cavity and
ceiling system before entering the
zone (referred to as Radiated Sound).
To properly quantify the amount of
acoustical energy emanating from
a terminal unit at a specific operating condition (i.e. CFM and static
pressure), manufacturers must measure and publish sound power
levels.
The units of measurement, decibels,
actually represent units of power
(watts). The terminal equipment
sound power ratings provide a
consistent measure of the generated
sound independent of the environment in which the unit is
installed. This allows a straight forward comparison of sound
performance between equipment
manufacturers and unit models.
Noise Criteria (NC). The bottom
line acoustical criteria for most
projects is the NC (Noise Criteria)
level. This NC level is derived from
resulting sound pressure levels in
the zone. These sound pressure lev-
els are the effect of acoustical
energy (sound power levels)
entering the zone caused by the terminal unit and other sound
generating sources (central fan system, office equipment, outdoor
environment, etc.).
The units of measurement is once
again decibels; however, in this
case decibels represent units of
pressure (Pascals), since the human
ear and microphones react to pressure variations.
There is no direct relationship
between sound power levels and
sound pressure levels. Therefore,
we must predict the resulting sound
pressure levels (NC levels) in the zone
based in part by the published
sound power levels of the terminal
equipment. The NC levels are totally dependent on the project specific
design, architecturally and mechanically. For a constant operating
condition (fixed sound power
levels), the resulting NC level in the
zone will vary from one project to
another.
ARI 885. A useful tool to aid in pre-
dicting space sound pressure levels
is an application standard referred
to as ARI Standard 885. This standard provides information (tables,
formulas, etc.) required to calculate
the attenuation of the ductwork, ceiling cavity, ceiling system, and
conditioned space below a terminal unit. These attenuation values
are referred to as the “transfer
function” since they are used to
transfer from the manufacturer’s
sound power levels to the estimated sound pressure levels resulting
in the space below, and/or served
by the terminal unit. The standard
does not provide all of the necessary information to accommodate
every conceivable design; however, it does provide enough
information to approximate the
transfer function for most applications. Furthermore, an Appendix
is provided that contains typical
attenuation values. Some manufacturers utilize different assumptions
with respect to a "typical" project
design; therefore, cataloged NC
levels should not be used to compare acoustical performance. Only
certified sound power levels should
be used for this purpose.
GENERAL DESIGN
RECOMMENDATIONS FOR A
QUIET SYSTEM
The AHU. Sound levels in the
zone are frequently impacted by central fan discharge noise that
either breaks out (radiates) from the
ductwork or travels through the distribution ductwork and enters the
zone as airborne (discharge) sound.
APPLICATION AND SELECTION • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog
7
Achieving acceptable sound levels
in the zone begins with a properly designed central fan system
which delivers relatively quiet air to
each zone.
Supply Duct Pressure. One primary
factor contributing to noisy systems
is high static pressure in the primary
air duct. This condition causes higher sound levels from the central fan
and also higher sound levels from
the terminal unit, as the primary air
valve closes to reduce the pressure.
This condition is compounded when
flexible duct is utilized at the terminal inlet, which allows the central
fan noise and air valve noise to break
out into the ceiling cavity and then
enter the zone located below
the terminal. Ideally, the system
static pressure should be reduced
to the point where the terminal unit
installed on the duct run associated with the highest pressure drop
has the minimum required inlet pressure to deliver the design airflow
to the zone. Many of today’s
HVAC systems experience 0.5" w.g.
pressure drop or less in the main
trunk. For systems that will have
substantially higher pressure
variances from one zone to another, special attention should be paid
to the proper selection of air terminal equipment.
To date, the most common approach
has been to select (size) all of the terminals based on the worst case
(highest inlet static pressure) condition. Typically, this results in 80% (or
higher) of the terminal units being
oversized for their application. This
in turn results in much higher equipment costs, but more importantly,
drastically reduced operating
efficiency of each unit. This consequently decreases the ability to
provide comfort control in the zone.
In addition, the oversized terminals
cannot adequately control the minimum ventilation capacity required
in the heating mode.
A more prudent approach is to utilize a pressure reducing device
upstream of the terminal unit on
those few zones closest to the
central fan. This device could simply be a manual quadrant type
damper if located well upstream of
the terminal inlet. In tight quarters,
perforated metal can be utilized as
a quiet means of reducing system
pressure. This approach allows all
of the terminal units to experience
a similar (lower) inlet pressure.
They can be selected in a consistent
manner at lower inlet pressure
conditions that will allow more
optimally sized units.
Inlet duct that is the same size as
the inlet collar and as straight as possible will achieve the best acoustical
performance. For critical applications, flexible duct should not be
utilized at the terminal inlet.
Zoning. On projects where inter-
nal lining of the downstream duct
is not permitted, special considerations should be made to assure
acceptable noise levels will be
obtained. In these cases, a greater
number of smaller zones will help
in reducing sound levels. Where possible, the first diffuser takeoff
should be located after an elbow
or tee and a greater number of small
necked diffusers should be utilized, rather than fewer large necked
diffusers.
The downstream ductwork should
be carefully designed and
installed to avoid noise
regeneration. Bull head tee
arrangements should be
located sufficiently downstream of the terminal
discharge to provide an
established flow pattern
downstream of the fan.
Place diffusers downstream
of the terminal after the
airflow has completely
developed.
Downstream splitter dampers can
cause noise problems if placed
too close to the terminal, or when
excessive air velocities exist. If tee
arrangements are employed,
volume dampers should be used in
each branch of the tee, and balancing dampers should be provided
at each diffuser tap. This arrangement provides maximum flexibility
in quiet balancing of the system.
Casing radiated sound usually dictates the overall room sound levels
directly below the terminal. Because
of this, special consideration should
be given to the location of these
terminals as well as to the size of
the zone. Larger zones should have
the terminal located over a corridor or open plan office space and
not over a small confined private
office. Fan powered terminals
should never be installed over
small occupied spaces where the
wall partitions extend from slab-toslab (i.e. fire walls or privacy walls).
Fan Terminal Isolation. Model CFR
fan terminals are equipped with sufficient internal vibration dampening
means to prevent the need for additional external isolation. Flexible
duct connectors at the unit discharge typically do more harm
than good. The sagging membrane
causes higher air velocities and
turbulence, which translates into
noise. Furthermore, the discharge
noise breaks out of this fitting
more than with a hard sheet metal
fitting.
IDEAL DUCT DESIGN
Small Necked Diffusers
High Quality
VAV Terminal
with Low
Sound Levels
Minimum
Required
Inlet Static
Pressure
Multiple
Branch
Take-Offs
Damper
Located at
Take-Off
Short Length of
Non-Metallic Flexible Duct
CFR • APPLICATION AND SELECTION
8
CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
SELECTION GUIDELINES
The CFR fan terminal has been
designed to provide maximum
flexibility in matching primary air
valve capacities (cooling loads)
with unit fan capacities. The overall unit size is dictated by the fan
size. With each unit fan size, multiple primary air valve sizes are
available to handle a wide range
of cooling capacities.
The fan should be sized first to
determine the unit size. The selection is made by cross plotting the
specified fan capacity and external
static pressure on the appropriate
fan performance curves (see page
16). Terminals utilizing hot water
heating coils require the summation of the coil air pressure drop
and the design E.S.P. to determine
the total E.S.P. It is common to have
more than one fan size which can
meet the design requirements.
Typically, the selection begins with
the smallest fan that can meet the
capacity. Occasionally this selection may not meet the acoustical
requirements and thus the next larger fan size should be selected.
“Upsizing” may also occur when it
is necessary to meet the design
capacity on the medium or low
motor tap.
Fan selections can be made anywhere in the non-shaded areas.
Each fan performance curve depicts
the actual performance of the relative motor tap without additional
fan balance adjustment. Actual
specified capacities which fall below
a particular fan curve (low, medi-
um or high) is obtained by adjustment of the electronic (SCR) fan
speed controller. After the proper
fan is selected, the unit size is
fixed and then the appropriate
primary air valve is selected. Most
of the unit fan sizes have three air
valve sizes to select from. The middle size will typically be utilized. It
is the size that is matched with the
unit fan to deliver 100% cooling
capacity for the majority of fan selections.
The larger primary air valve will be
used in applications where the
system fan is undersized, requiring
a larger air valve to take advantage
of lower pressure losses. While helping in this fashion, a penalty is paid
by having a higher controllable minimum airflow setpoint than could
be achieved with a smaller inlet size.
The smaller primary air valve will
most often be utilized with thermal storage systems where lower
than normal primary air temperatures are utilized. In these cases,
the maximum design primary airflow is less than the fan capacity
(typically 60 to 80%), and therefore
a smaller air valve may be appropriate.
SYSTEM PRESSURE
CONSIDERATIONS
Since the terminal unit fan is selected to move 100% of the design
airflow to the zone, all downstream pressure losses are neglected
when determining minimum primary air inlet pressure to the unit.
The central fan is only required to
overcome the minimal loss through
the unit air valve, reducing the
central fan total pressure and
horsepower requirements. Due to
extremely low pressure drop of the
air valve, central fan operating
inlet static pressures may be as low
as 0.5" w.g.
COMMON MISAPPLICATION
It should be noted that a conventional Series Flow Fan Terminal
cannot be applied as a booster fan.
In problem areas where there is
insufficient primary airflow capacity, this terminal will not aid in
pulling more air from the primary
duct. Instead the unit fan will draw
air from the plenum inlet which has
less resistance.
The induction opening should
never be sealed, as this will cause
problems should the primary airflow increase beyond the unit fan
capacity. In this condition, the fan
casing becomes pressurized which
will eventually stall the fan motor
and cause premature failure.
An ENVIRO-TEC
®
Windows
®
based Computer Selection
Program is also available for complete CFR automated selection.
PRIMARY AIRFLOW CALIBRATION • CFR
©May, 2006 Environmental Technologies, Inc. • CFR Catalog
9
.015 .03 .05 1.0 > 1.5
0404 43 250 35 250 30 43 55 250 250
0504, 0506 68 350 50 350 48 68 88 350 350
0604, 0606, 0611 75 490 60 550 53 75 97 435 530
0806, 0811, 0818 145 960 115 1000 105 145 190 840 1000
1011, 1018, 1021 235 1545 185 1600 165 235 305 1355 1600
1218, 1221, 1224, 1230 340 2250 285 2300 240 340 440 1975 2300
1421, 1424, 1430 475 3100 390 3100 335 475 615 2750 3100
1630, 1640, 1644 625 4100 520 4100 440 625 805 3595 4100
1844 810 4600 640 4600 580 810 1040 4470 4600
UNIT SIZE
MIN.
MAX.
MIN.
MAX.
400 SERIES (PNEUMATIC)
STANDARD CONTROLLER
7000 SERIES ANALOG
ELECTRONIC
DDC CONSIGNMENT CONTROLS
(See Notes Below)
MIN.
MAX.
Min. transducer
differential pressure
(in. w.g.)
Max. transducer
differential pressure
(in. w.g.)
Airflow Ranges (CFM)
1
Minimum and maximum airflow limits are dependent on the specific DDC controller supplied. Contact the control vendor to
obtain the minimum and maximum differential pressure limits (inches W.G.) of the transducer utilized with the DDC controller.
2
Maximum CFM is limited to value shown in General Selection Data.
FlowStar™ Calibration Chart
(For dead-end differential pressure transducers)
NOTE: Maximum and minimum CFM limits are dependent on the type of controls that are utilized. Refer to the table below for
specific values. When DDC controls are furnished by others, the CFM limits are dependent on the specific control vendor that is employed.
After obtaining the differential pressure range from the control vendor, the maximum and minimum CFM limits can be obtained from
the chart above (many controllers are capable of controlling minimum setpoint down to .015" w.g.).
CFR • DIMENSIONAL DATA
10
CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
MODEL CFR
Top View
(Pneumatic Controls
Not Shown in This View)
Left Side View
(Control Enclosure and Filter Rack
Not Shown in This View)
Inlet End View
(Electronic Controls and Filter Rack
Not Shown in This View)
UNIT
SIZE
IABCDXYWHL
0404
3 7/8
[98]
6
[152]
5
[127]
3/4
[19]
10 1/2
[267]
8 3/8
[213]
8
[203]
18
[457]
12
[305]
28
[711]
0504
4 7/8
[124]
6
[152]
5
[127]
3/4
[19]
10 1/2
[267]
8 3/8
[213]
8
[203]
18
[457]
12
[305]
28
[711]
0604
5 7/8
[149]
6
[152]
5
[127]
3/4
[19]
6 1/2
[165]
8 3/8
[213]
8
[203]
18
[457]
12
[305]
28
[711]
0506
4 7/8
[124]
6
[152]
2 1/4
[57]
3/4
[19]
10 1/2
[267]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0606
5 7/8
[149]
6
[152]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0806
7 7/8
[251]
6
[152]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0611
5 7/8
[149]
6
[152]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0811
7 7/8
[200]
6
[152]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
1011
9 7/8
[251]
7
[178]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0818
7 7/8
[200]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1018
9 7/8
[251]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1218
11 7/8
[302]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1021
9 7/8
[251]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1221
11 7/8
[302]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1421
13 7/8
[352]
9
[229]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1224
11 7/8
[302]
10
[254]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
28
[711]
15
[381]
38
[965]
19
[483]
54
[1372]
1424
13 7/8
[352]
10
[254]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
28
[711]
15
[381]
38
[965]
19
[483]
54
[1372]
1230
11 7/8
[302]
10
[254]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1430
13 7/8
[352]
11 1/2
[292]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1630
15 7/8
[403]
11 1/2
[292]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1440
13 7/8
[352]
11 1/2
[292]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1640
15 7/8
[403]
11 1/2
[292]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1644
15 7/8
[403]
11 1/2
[292]
9 3/4
[248]
3 1/4
[83]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1844
15 7/8
[403] x
15 7/8
[403]
11 1/2
[292]
9 3/4
[248]
3 1/4
[83]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
NOTE: All dimensions are in inches [mm].
Drawings are not to scale and not for submittal or installation purposes. Refer to www.enviro-tec.com for current submittal drawings.
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