Enviro CFR Owner's manual

INSTALLATION, OPERATION & MAINTENANCE
FAN POWERED VAV TERMINALS
Form ET130.13-NOM3 (1219)
MODELS CFR, CFRQ, CFL, VFR & VFL
Supersedes: ET130.13-NOM3 (819)

ENVIRO-TEC
2
FORM ET130.13-NOM3 (1219)
TABLE OF CONTENTS
SAFETY CONSIDERATIONS........................................................................................................................4
INSPECTION.................................................................................................................................................5
STORAGE .....................................................................................................................................................5
PRE-INSTALLATION INSPECTION..............................................................................................................5
SEQUENCE OF OPERATION.......................................................................................................................6
Parallel Flow...........................................................................................................................................6
Series Flow.............................................................................................................................................6
INSTALLATION.............................................................................................................................................6
Clearances .............................................................................................................................................7
Hanging and Mounting Equipment Overhead ....................................................................................7
Duct Connections..................................................................................................................................7
Sound Critical Applications..................................................................................................................7
Coil Connections...................................................................................................................................8
Electrical.................................................................................................................................................8
OPERATION..................................................................................................................................................8
Start-Up ..................................................................................................................................................8
Power Requirements ...........................................................................................................................8
Primary Air Damper and Fan Adjustment ...........................................................................................8
Inspection & Start-Up Checklist...........................................................................................................9
Series Flow, PSC Motor with SCR......................................................................................................10
Parallel Flow, PSC Motor with SCR....................................................................................................10
MAINTENANCE ..........................................................................................................................................11
Factory Provided Damper Actuator...................................................................................................11
Damper Shaft.......................................................................................................................................11
Motor/Blower........................................................................................................................................11
Cleaning..........................................................................................................................................11
Replacement...................................................................................................................................11
Coil........................................................................................................................................................11
Cleaning..........................................................................................................................................12
Replacement...................................................................................................................................12
Electric Heat.........................................................................................................................................12
Replacement...................................................................................................................................12
GENERAL TROUBLESHOOTING GUIDELINES.......................................................................................13
VALVE CALIBRATION CHARTS ...............................................................................................................14
FAN CFM CALIBRATION CURVES............................................................................................................15
TERMINAL UNIT WEIGHTS .......................................................................................................................16
FACTORY REPLACEMENT PARTS & WARRANTY .................................................................................17
COMPONENT INSTALLATION, OPERATION & MAINTENANCE APPENDIX.........................................18

ENVIRO-TEC 3
FORM ET130.13-NOM3 (1219)
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 se-
rious injury.

ENVIRO-TEC
4
FORM ET130.13-NOM3 (1219)
SAFETY CONSIDERATIONS
The equipment covered in 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, experience personnel familiar with local
codes and regulations, 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 equip-
ment. More then one source of power
may be present. Disconnect, tag and
lock out all power sources to avoid
electrocution or shock hazards.
ROTATING EQUIPMENT HAZARD
Fans may start automatically. Discon-
nect all power and control circuits
prior to servicing to avoid injury.
Caution should be exercised due to the
possibility of fans “free wheeling” due
to connected duct air movement.
HOT PARTS HAZARD
Electric heaters may start automati-
cally. Disconnect all power and con-
trol circuits prior to servicing to avoid
burns.
Check that rigging and lifting equip-
ment can safely support the equipment
assembly and component weights.
All assemblies must be adequately
secured during lifting and rigging
by temporary supports and restraints
until equipment is permanently fas-
tened and set in its’ nal location per
manufacturer’s guidelines.
All temporary and permanent equip-
ment supports must be capable of
safely supporting the equipment’s
weight as well as any additional live,
seismic 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 loosen-
ing or breaking away due to system
operation and vibration.
Dampers may activate automatically.
Disconnect the control circuits or
pneumatic control systems and secure
all dampers when servicing damper,
actuators or linkage to avoid injury.
Wear the appropriate personal protec-
tive equipment (gloves, safety glasses,
leather closed toe shoes, etc) when
handling this equipment recognizing
that sheet metal components are being
handled.

ENVIRO-TEC 5
FORM ET130.13-NOM3 (1219)
INSPECTION
Upon receipt of equipment, carefully check all items
against the bill oflading to ensurethat all equipment has
been received (including shipped loose items). Note any
discrepancy on the bill of lading before signing. Note
that “ship loose” items may be included with the base
unit or shipped (bulk) on a separate pallet.
Inspect all equipment for any signs of damage caused
during transit. On equipment with electric heat, make
sure to check the coil ns and/or make sure that the
resistance heat coils are not damaged. Note any
visual damage on the bill of lading before signing.
Immediatelyreportall visualand concealed damage
to the carrier and le a claim with the carrier.
Locate the model number on the nameplate and check
that the correct equipment has been received. Verify
that all options have been included, such as controls,
lters, heating coils, etc. Also check that equipment
voltage agrees with the building parameters. If a
discrepancy isdiscoveredbetweenwhat wasordered and
received, contact your local Enviro -Tec representative
immediately.
Do not use ow sensor, connecting
tubes, coil stubouts or damper shaft
as a handle when lifting or moving
equipment as damage may occur.
Do not handle by equipment’s heat-
ing elements, as permanent damage
will occur.
Check assembly and component
weights to be sure that the rigging
equipment can handle them safely.
Note; also check the centers of gravity
and any specic rigging instructions.
Check for adequate ventilation so
fumes do not migrate through ductwork
to occupied spaces when welding or
cutting around the equipment.
Do not work on damper until associ-
ated actuator is disconnected.
Never pressurize equipment above
specied test pressure.
Protect adjacent ammable materials
when brazing. Use ame and heat
protection barriers where need. Have
a re extinguisher at hand and ready
for immediate use.
STORAGE
If equipment is to be stored prior to installation, observe
the following precautions:
1. Choose a dry storage site that is reasonably level
and sturdy to prevent undue stress or permanent
damage to the equipment. Set equipment off
ground if in moisture prone areas.
2. Cover entire equipment with protective tarp or
moisture proof cover. Extend cover under equip-
ment if stored on ground. Secure cover with
adequate tie downs. Be sure that piping connec-
tions have protective shipping caps installed.
3. Do not stack equipment any higher than how
it was shipped. If equipment has been unpack-
aged since receipt from the factory, do not stack
without equivalent support between units as was
supplied from the factory.
PRE-INSTALLATION INSPECTION
Do not use ow sensor, connecting
tubes, coil stubouts or damper shaft
as a handle when lifting or moving
equipment as damage may occur.
Do not handle by equipment’s heat-
ing elements, as permanent damage
will occur.

ENVIRO-TEC
6
FORM ET130.13-NOM3 (1219)
While viewing the damper from the discharge of the
equipment, disengage the actuator by depressing the
manual override button on the side of the actuator and
rotate the shaft fully. The damper should close fully and
there should be no gaps between the damper gasketing
and the inside of the valve.
Units equipped with ECM or 1 horsepower motors will
ship from the factory with a removable motor / wheel
support installed in the fan housing. It is imperative that
this shipping support be removed prior to equipment
startup or damage may result to both the motor and the
wheel. A label will be afxed to the outside of the unit
next to the power entry point, to identify the presence
of this shipping insert.
Manually rotate the fan wheel to assure that there are
no obstructions within the fan housing.
Equipment supplied with ECM mo-
tors, backward or reverse rotation of
the blower is detrimental to the ECM
motor.
SEQUENCE OF OPERATION
All fan-powered equipment is supplied with a rectangular
discharge and comes in one of two congurations:
1. Parallel ow with hot water coils mounted on the
plenum induction air opening.
2. Series ow with hot water coils mounted on the
discharge opening.
Note that for either conguration, electric heaters (if
supplied) are always mounted on the unit discharge
opening.
Parallel Flow
On parallel flow equipment, the primary air valve
delivers cooled air to the equipment’s outlet. When the
space temperature decreases beyond the control of the
primary air valve, the fan is started along with the rst
stage of heat. The fan delivers warm plenum air from
the controlled space to the equipment’s outlet, which
is mixed with the primary air prior to being delivered
to the space.
Either the primary air valve, fan or
both can deliver airow to the occupied
space. A back draft damper is provided,
when the fan is not operating. The ef-
ciency of this system is the same as
standard single duct VAV equipment.
In a typical control sequence applied to parallel ow
equipment, the air valve is closed to a zero minimum
airow before the fan is energized. After the fan has
been energized, the reheat will be energized upon a
further drop in space temperature. Therefore, little
primary air is mixed with the heated air stream.
Series Flow
Fan must be energized prior to intro-
duction of air through the primary
air valve or the possibilities exist that
the fan wheel will operate backwards
/ counter rotation.
On series ow equipment, the fan runs continuously
whenever the central air handler is in operation.
In response to the space temperature, the air valve
modulates the volume of primary air. The re-heat is
typically off during the air valve’s modulation. Should
the space temperature decrease to the point at which a
decrease in primary air will not maintain the desired
temperature, the reheat will be activated to increase the
discharge air temperature.
INSTALLATION
Do not use ow sensor, connecting
tubes, coil stubouts or damper shaft
as a handle when lifting or moving
equipment as damage may occur.
Do not handle by equipment’s heat-
ing elements, as permanent damage
will occur.

ENVIRO-TEC 7
FORM ET130.13-NOM3 (1219)
Terminal equipment with electric heat must be installed
in a horizontal plane with respect to the air stream. Low
height equipment can be ipped over in the eld to vary
or change control section handing.
Clearances
All equipment covered in this document, including
those with electric heat, are ETL listed for 0.0”
clearance to combustibles. Refer to NEC and/or local
codes for minimum electrical clearances required for
service. Equipment should not make contact with any
structure located above or below the equipment without
appropriate isolation. Equipment supplied with bottom
access panels requires sufcient clearance to remove
access panels for service.
Hanging and Mounting Equipment Overhead
ENVIRO-TEC strongly recommends that all equipment
be suspended from the upper most ceiling or a structural
element of the building, independent of the false
ceiling grid. Suspension devices are eld supplied,
sized and designed by others. ENVIRO-TEC will not
accept responsibility for equipment mounting supports.
Equipment must be installed in a level horizontal plane.
Failure to level equipment properly may prevent proper
operation of controls. See Tables 3 and 4 for equipment
weights.
When requested, equipment is supplied with optional
hanger brackets for use with (up to) a 3/8” [10mm]
diameter hanger rod. See submittal drawingsfor hanger
bracket locations.
Hanger straps may be utilized as an alternate means of
suspending the equipment. Do not secure hanger straps
to electric heaters, coils or control enclosures. Hanger
straps can be mounted directly to the sides and bottom
of equipment casing,such that theydo not interfere with
working components or access panels using screws that
are no longer than 1” [25mm].
When hanging equipment, always use the support
method as prescribed for rectangular duct in the job
specications.
Duct Connections
All duct connections should be congured and installed
in accordance with SMACNA guidelines and all local
code requirements. Check to see that duct fasteners are
appropriate for the application and do not impinge any
internal components. Pay particular attention to internal
electrical components.
Fasten and seal all ductwork connections in accordance
with project specications.
Allow a minimum of 1½ duct diameters of straight
duct prior to equipment inlet and after equipment
discharge.
The diameter of the inlet duct for round valves must
be equal to the listed size of the equipment. The round
air valve inlet collar of the equipment is 1/8” smaller
then listed size in order to allow the round ductwork to
slip over the air valve inlet collar.
DO NOT INSERT
DUCTWORK INTO AIR VALVE INLET COLLAR.
When making ductwork connection to air valve inlet
collar and insulating air valve inlet, take caution not to
damage or remove the ow sensor connections, which
are vital to equipment control.
Provide insulation around entire inlet collar (all the way
to the equipment casing).
Cut “slits” in the insulation for the ow tubes and secure
with duct tape.
Permissible discharge duct connections are straight
anged, slip and drive or drive and screw.
If equipment is to be installed in a location with high
humidity, external insulation around the heating coil
should be installed.
After all connections are made, check that the entire
ductwork system is airtight. In some high-pressure
systems, duct sealer may be necessary.
Sound Critical Applications
Flexible duct connectors are not recommended on
equipment discharge. The sagging membrane of
these ttings can cause turbulence and locally high
air velocities that generate noise. Also, lightweight
membrane material allows noise to breakout, which can
increase sound levels in the space below.

ENVIRO-TEC
8
FORM ET130.13-NOM3 (1219)
Coil Connections
Hot water and steam coils are male sweat connection.
Use appropriate brazing alloy for system temperature
and pressure. Refer to equipment construction submittal
drawing for specic connection size. MAXIMUM
HYDRONIC SYSTEM OPERATING PRESSURE
MUST NOT EXCEED 300 PSIG. MAXIMUM
STEAM SYSTEM PRESSURE MUST NOT
EXCEED 15 PSIG.
If necessary, you can change coilconnection handing on
one and two row coils from left-hand to right-hand (and
vice-versa) by rotating the coil “like a steering wheel”
180° about its central axis when facing the ns. For
three and four row coils, consult factory.
Electrical
All eld wiring must comply with NEC and all local
codes. Electrical and control diagrams are afxed to the
interior of the control enclosure box.
Minimum circuit ampacity (MCA) designates the
maximum operating load of the equipment for sizing
wire feeders. Supply Circuit Protection designates the
largest breaker in the electrical service panel that can
be used to protect the equipment.
Use Copper conductors only.
OPERATION
Start-Up
Thorough safety precautions should always be taken
when performing startup and service. Refer to safety
considerations at the beginning of this Operation Manual
and the Inspection & Start-Up Checklist in this section.
Only qualied individuals should perform these tasks.
Prior to start-up, the project control sequence/wiring
diagram should be obtained and thoroughly understood.
If factory supplied analog or DDC controls are utilized,
refer to the applicable Operation Manual for start-up
and balancing information. Check that all electrical
work is nished and properly terminated. Check that
all electrical connections are tight and that the proper
voltage is connected.
Check to make sure that heater elements are not
damaged, free of all foreign material and proper control
interlocks have beenmade before energizing the electric
heater.
Power Requirements
Three Phase AC power imbalance must not exceed 2%.
Be sure that the following guides are met:
1. AC power is within 10% of rated voltage at rated
frequency. (See equipment nameplate for rat-
ings)
2. AC power is within 5% of rated frequency at rated
voltage.
3. A combined variation in the voltage and frequency
of 10% (sum of absolute values) of rated values
provided the frequency variation does not exceed
5% of rated frequency.
Primary Air Damper and Fan Adjustment
Unit should not be balanced until the incoming power
supply is at the permanent voltage condition. All
discharge ductwork must be connected. The minimum
recommend discharge staticpressure forall fan-powered
equipment is 0.1” wg. and 0.2” on 3/4hp and larger
(see fan curves located on the Enviro -Tec web site for
specics). All foreign materials should be removed
from the duct system. Optional filters should be
installed as required.
Unless otherwise specied, the fan motor has three
speeds. Fan speed is selected in the electrical control
enclosure by one of two methods. For units with dual
motors, see Figure 1A showing how the fan speed is
selected by placement of a factory supplied jumper
wire on a terminal strip. Otherwise see Figure 1B
which shows the wire to wire fan speed selection
method. Simply insert the male quick connect (from
control circuitry) into the female quick connect which
corresponds to high(black), medium(blue), or low(red)
motor speeds. Units are set to low speed at the factory
as standard in order to optimize energy efciency. A
three position rotary switch is optional.
ELECTRICAL SHOCK HAZARD
All power must be disconnected prior
to changing jumper or serious injury
or death will result.
All fan-power equipment is shipped with an electronic
solid state fan speed controller (SCR) for PSC motors.
The SCR is located in the control enclosure. Using
a 1/8” at blade screwdriver, adjusting the manual
potentiometer clockwise will increase the motor speed;
adjusting the potentiometer counterclockwise will
decrease the motor speed.

ENVIRO-TEC 9
FORM ET130.13-NOM3 (1219)
Receiving & Inspection
□ Unit Received Undamaged
□ Unit Arrangement/Hand Correct
□ Unit Received Complete as Ordered
□ Unit Structural Support Complete & Correct
Handling & Installation
□ Unit Mounted Level & Square
□ Proper Electrical Service Provided
□ Proper Service Switch/Disconnect Provided
□ Proper Access Provided For Unit & Accessories
□Proper Overcurrent Protection Provided
□ Proper Chilled Water Line Size to Unit
□ Proper Refrigerant Line Sizes to Unit
□ Proper Steam Condensate Trap on Return Line
□ All Services to Unit in Code Compliance
□ Proper Hot Water Line to Unit
□ Proper Steam Line Sizes to Unit
□ Proper Steam Supply Pressure to Unit (15psi Max)
□ All Shipping Screws & Braces Removed
Cooling/Heating Connections
□ Protect Valve Package Components From Heat
□ Connect Field Piping to Unit
□ Install Drain Line & Traps as Required
□ Install Condensate Pan Under Piping as Required
□ Mount Valve Packages
□ Pressure Test All Piping for Leaks
□ Insulate All Piping as Required
□ Connect Supply and Return Pipe to Correct
Coil Connections
Ductwork Connections
□ Install Ductwork, Fittings & Grilles as Required
□ Control Outside Air for Freeze Protection
□ Proper Supply/Return Grille Types & Sizes Used
□ Insulate All Ductwork as Required
Electrical Connections
□ Refer to Unit Wiring Diagram
□ All Field Wiring in Code Compliance
□ Connect Incoming Power Service or Services
□ SCR Fan Speed Control Wired to High Speed
Unit Startup
□ General Visual Unit & System Inspection
□ Record Ambient Temperature
□ Close All Unit Isolation Valves
□ Fill Systems With Water/Refrigerant
□ All Ductwork & Grilles in Place
□ Start Fans, Etc.
□ Check All Ductwork & Units for Air Leaks
□ Record All Final Settings for Future Use
□ Check All Dampers for Proper Operation
□ Verify Proper Heating Operation
□ Record Electrical Supply Voltage
□ Check All Wiring for Secure Connections
□ Flush Water Systems
□ Vent Water Systems as Required
□ All Unit Panels & Filters In Place
□ Check for Overload Condition of All Units
□ Balance Air Systems as Required
□ Check Piping & Ductwork for Vibration
□ Verify Proper Cooling Operation
□ Reinstall All Covers & Access Panels
INSPECTION & START-UP CHECKLIST
(BASED ON UNIT CONFIGURATION, SOME CHECKLIST ITEMS MAY NOT BE APPLICABLE)

ENVIRO-TEC
10
FORM ET130.13-NOM3 (1219)
FIGURE 1A - FAN SPEED CONTROL WITH JUMPER
FIGURE 1B - WIRE TO WIRE FAN SPEED SELECTION
Series Flow, PSC Motor with SCR
1. Make sure that the motor speed is at maximum by
turning the potentiometer located on the Fan Speed
Control (SCR) all the way clockwise.
2. Energize motor and let motor operate for a mini-
mum of 15 minutes. During this run-in, check
ductwork for any leaks and repair as necessary.
3. If remote balancing dampers are present set them
to full open.
4. Attach a manometer or magnehelic to the differen-
tial pressure ports in the pneumatic tubing leading
to the high and low side of the inlet air probe and
measure the velocity pressure. Adjust and set the
primary maximum airow as necessary to meet
job site requirements. See Table 2, Airow vs.
Velocity Pressure chart. This chart, with different
inlet sizes, is also located on the side of the equip-
ment.
5. If balancing dampers are present, adjust and set
proportionally to desired position. To minimize
noise levels, leave these dampers in the most open
position possible.
6. If total airow is too low, de-energize unit and
move jumper to next higher speed.
7. Energize unit and adjust Fan Speed Control (SCR)
for desired total airow.
8. The maximum primary air balance may be checked
using the optional radiated sound damper, or by
suspending a sheet of notebook paper over the
inlet using a small piece of tape. If the damper or
notebook paper is blowing out of the unit, the pri-
mary maximum airow is too high. If the paper or
damper is being pulled into the unit, the maximum
primary airow is too low. Optimum balance is
achieved when the damper or paper hangs straight
down.
Parallel Flow, PSC Motor with SCR
1. Make sure that the motor speed is at maximum by
turning the potentiometer located on the Fan Speed
Control (SCR) all the way clockwise.
2. With primary air valve in the closed position, en-
ergize motor and let motor operate for a minimum
of 15 minutes. During this run-in, check ductwork
for any leaks and repair as necessary.
3. If balancing dampers are present, adjust and set
proportionally to desired position. To minimize
noise levels, leave these dampers in the most open
position possible.
4. If fan airow is too low, de-energize unit and move
jumper to next higher speed.
5. De-energize motor and perform minimum and
maximum primary air balance. See Table 2, Air-
ow vs. Velocity Pressure chart. This chart, with
different inlet sizes, is also located on the side of
the equipment.
An extra jumper is required on units
with 480 VAC motors. See wiring dia-
gram attached to unit.
JUMPER
LD13840
LD13848

ENVIRO-TEC 11
FORM ET130.13-NOM3 (1219)
MAINTENANCE
Factory Provided DamperActuator
Equipment may be supplied with a eld
or factory mounted damper actuator.
If actuator is factory provided, see
ACT24 Floating-Point Control Direct
Coupled Actuator document. See Ta-
ble 1 for maximum wire lengths for
control voltage.
Damper Shaft
There is an indicator on the end of the damper shaft that
can be used to determine the position on the damper
blade. If the indicator is horizontal, the damper is
completely open.
Motor/Blower
Fan powered terminal unit motors are equipped with
permanently lubricated bearings and require little or
no maintenance. The frequency of required cleaning
is dependent on the operating hours of the system,
lter maintenance and efciency as well as dirt load.
Periodically inspect the motor and blower-housing
wheel for accumulation of dust and clean as necessary.
Cleaning
1. Disconnect all electrical power to the equipment,
tag and lock out power source.
2. Gain access to motor housing through access panel.
3. Use soft brush and vacuum to remove loose debris
from motor housing.
4. Replace access panels and restore electrical power
to equipment.
5. Use caution to assure that any contaminated materi-
al does not contact other areas of the equipment or
building. Properly dispose of all contaminated
materials.
Replacement
1. Disconnect all electrical power to the equipment,
tag and lock out power source.
2. Remove bottoms access doors by removing the
screws from the access door and then remove side
rail screws to access to the motor.
3. Disconnect fan motor wiring.
4. Remove securing fan assembly to discharge
5. Loosen fan wheel set screw.
6. Remove nuts securing motor to housing and re-
move motor.
7. Remove fan cut off.
8. Remove fan wheel and clean as needed.
9. Reinstall wheel, cut off, motor, and housing.
Coil
The frequency of required cleaning is dependent on the
operating hours of the system, lter maintenance and
efciency as well as dirt load.
Important: Coils may become ex-
ternally fouled as result of normal
operation. Dirt on the surface of the
coil reduces its ability to transfer heat
that can result in reduced performance
and increased operating energy cost.
If the dirt on the surface of the coil
becomes wet, microbial growth (mold)
can result, possibly causing unpleas-
ant odors and serious health related
indoor air quality problems.
Fin edges are sharp. Fins are fragile;
care must be exercised to avoid damag-
ing ns. Do not use solutions to clean
coils; drain pans are not present to
remove collected solution.
TABLE 1 - MAXIMUM WIRE LENGTHS
WIRE SIZE MAX FEET
16 GA 1225 FT
18 GA 725 FT
20 GA 400 FT
22 GA 200FT

ENVIRO-TEC
12
FORM ET130.13-NOM3 (1219)
Cleaning
1. Disconnect all electrical power to the equipment,
tag and lock out power source.
2. Put on appropriate personal protective equip-
ment.
3. Gain access to coil either through ductwork or
optional coil access panel.
4. Use soft brush and vacuum to remove loose debris
from sides of coil.
5. Straighten any coil ns that may have been dam-
aged during cleaning process with n comb.
6. Replace ductwork or access panel and restore
electrical power to equipment.
7. Use caution to assure that any contaminated mate-
rial does notcontact otherareas ofthe equipmentor
building. Properly dispose of all contaminated
materials.
Replacement
1. Disconnect all electrical power to the equipment,
tag and lock out power source.
2. Disconnect all ductwork, if applicable.
3. Remove lter rails/ lter clips, if applicable.
4. Cut or un-braze water connection at coil.
5. Disconnect coil from equipment by removing
screws on the exterior perimeter of the coil. Low
height equipment only has mounting screws lo-
cated on the sides of the equipment.
Electric Heat
Electric heat requires a minimum of
0.1” W.G. downstream static pressure
for proper operation.
Electric heaters come equipped with a primary
auto-reset limit switch to provide protection against
overheating. The primary auto-reset limit switch
automatically cuts the heater off when overheating
occurs, and turns the heater back on when the elements
have cooled down. Should the secondary one-time trip
limit switch trip, they will need to be replaced with a
limit switch that has the same trip temperature as the
one-time trip limit switch originally supplied with the
electric heater. Optional secondary manual reset limit
switches are available. Electric heaters may be equipped
with optional disconnect switch, fuses and airow
proving switch.
Replacement
1. Disconnect all electrical power to the equipment,
tag and lock out power source.
2. Disconnect discharge ductwork from unit.
3. Remove electric heat assembly from equipment.
4. Before removing wires from the element rack
T-Plate, mark where the wires are connected so
that they can be reconnected correctly on the new
element rack.
5. Remove the wires and screws holding the heater
T-plate in the control enclosure and remove ele-
ment rack.
6. Insert new element rack into control enclosure and
replace screws tosecure the elementrack tocontrol
enclosure.
7. Replace wires.
8. Close control enclosure cover before turning on
the power.

ENVIRO-TEC 13
FORM ET130.13-NOM3 (1219)
TROUBLESHOOTING GUIDELINES
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Motor Fails to Start
Blown fuse or open circuit breaker Replace fuse or reset circuit breaker; verify and correct
source of overload.
Shipping Cardboard insert in fan wheel Remove insert and restart.
Improper wiring connections Check wiring with diagram supplied on unit.
Improper current supply Compare actual supply power with motor nameplate recommendations. Contact power company for adjust-
ments.
Mechanical failure Check motor and conrm rotates freely.
Motor Overheats
Overloaded motor Reduce load or replace with a larger motor (refer factory).
Motor fan is clogged with dirt preventing
proper ventilation Remove fan cover, clean fan and replace cover. May be necessary to replace motor.
Lack of required external static pressure Add required external static pressure.
Excessive Motor
Noise
Motor mounting bolts loose Tighten motor mounting bolts.
Fan wheel rubbing on fan housing Align wheel in housing.
Loose fan wheel Align and tighten.
SCR set too low Select lower tap to Reduce motor speed and re-adjust
fan SCR.
Low Coil Capacity
Incorrect airow Check fan’s operating conditions.
Incorrect GPM Check water pumps, valves and lines for obstructions.
Dirty coil ns Clean coil Fins.
Dirty lter (where applicable) Replace lter.
Incorrect water temperature Provide proper water temperature.
Heater Does Not
Operate
No Power Check Disconnect.
No Control Voltage Check transformer and transformer fusing (if applicable)
replace if necessary.
Blown Fuse Replace fuse.
Open Limit (primary or secondary) Replace limits or reset as applicable.
Check for continuity across limit to determine if open,
replace as necessary.
Airow Incorrect Direction Check sensing tube, red tube = high and black tube =
low, rotate if needed.
Low External Static Pressure Increase airow to obtain a minimum of .1 in. w.c. exter-
nal static.
Damaged elements Check for open or damaged elements and replace as
necessary.
Low or High Tem-
perature Rise
Incompatible Thermostat or Controller Check Wiring.
Check for compatibility.
Problems with Additional Stages
Check location of thermostat; might be installed in a
“too hot” or “too cold” location. Check heat outputs on
controller.
Check contactors for open coil.
Check for damaged elements.
Incorrect CFM Check for blocked duct or location of heater.
Heater with SSR
Does Not Operate Incorrect Signal Applied Verify signal input.
Interface Board Fuse Blown Replace fuse.
GENERAL TROUBLESHOOTING GUIDELINES
FOR COMPONENT-SPECIFIC TROUBLESHOOTING, REFER TO THE COMPONENT IOM APPENDIX ON P. 18

ENVIRO-TEC
14
FORM ET130.13-NOM3 (1219)
VALVE CALIBRATION CHARTS
APPLICABLE CALIBRATION CHARTS ARE AFFIXED TO EACH UNIT AND MAY ALSO BE
DOWNLOADED FROM THE ENVIRO-TEC WEBSITE AT WWW.ENVIRO-TEC.COM
VALVE CALIBRATION CHART EXAMPLE

ENVIRO-TEC 15
FORM ET130.13-NOM3 (1219)
FAN CFM CALIBRATION CURVES
APPLICABLE CALIBRATION CURVES ARE AFFIXED TO EACH UNIT AND MAY ALSO BE
DOWNLOADED FROM THE ENVIRO-TEC WEBSITE AT WWW.ENVIRO-TEC.COM
FAN CFM CALIBRATION CURVE EXAMPLE

ENVIRO-TEC
16
FORM ET130.13-NOM3 (1219)
TERMINAL UNIT WEIGHTS
CFR (22 GA)
BASE UNIT WEIGHT ADDERS TO BASE UNIT WEIGHT
SIZE SINGLE
WALL DOUBLE WALL WATER COIL ELEC.
HEAT
1 ROW 2 ROW 3 ROW 4 ROW
0506 58 13 5 7 10 13 20
0606 57 13 5 7 10 13 20
0806 58 13 5 7 10 13 20
0611 59 13 5 7 10 13 20
0811 60 14 5 7 10 13 20
1011 61 14 5 7 10 13 20
0818 75 16 7 11 16 22 23
1018 77 17 7 11 16 22 23
1218 79 17 7 11 16 22 23
1021 79 17 9 11 16 22 23
1221 81 18 9 11 16 22 23
1421 83 18 9 11 16 22 23
1224 108 24 11 23 34 45 27
1424 111 24 11 23 34 45 27
1230 174 38 21 42 63 84 42
1430 177 39 21 42 63 84 42
1630 179 39 21 42 63 84 42
1440 181 40 21 42 63 84 42
1640 184 40 21 42 63 84 42
1644 194 42 21 42 63 84 52
1844 209 46 21 42 63 84 52
SERIES FLOW TERMINAL UNIT WEIGHTS
PARALLEL FLOW TERMINAL UNIT WEIGHTS
VFR (22 GA)
BASE UNIT WEIGHT ADDERS TO BASE UNIT WEIGHT
SIZE SINGLE
WALL DOUBLE WALL WATER COIL ELECTRIC
HEAT
1 ROW 2 ROW 3 ROW 4 ROW
4 44
PENDING
10 14 18 22 18
5 44 10 14 18 22 18
6 46 10 14 18 22 18
8 48 10 14 18 22 20
10 85 14 19 25 30 27
12 87 14 19 25 30 31
14 118 16 21 29 34 26
16 120 16 21 29 34 31

ENVIRO-TEC 17
FORM ET130.13-NOM3 (1219)
FACTORY REPLACEMENT PARTS AND WARRANTY
Factory replacement parts should be used wherever
possible to maintain the unit performance and
operating characteristics and the testing agency listings.
Replacement parts may be purchased through the local
Sales Representative.
Contact the local Sales Representative before
attempting any unit modications. Any modications
not authorized by the factory could result in personal
injury and damage tothe unit andcould void allfactory
warranties.
When ordering parts, the following information must
be supplied to ensure proper part identication:
1. Complete unit model number
2. Unit hand connection (right or left hand) while
facing the direction of airow at the inlet
3. Complete part description including any numbers
On warranty replacements, in addition to the information
previously listed, the project CO # that appears on the
unit nameplate, is required.
Contact the factory for authorization to return any
parts such as defective parts replaced in warranty. All
shipments returned to the factory MUST be marked
with a Return Authorization Number, which is provided
by the factory.
All equipment and components sold through ENVIRO-
TEC are warranted under the same conditions as the
standard manufacturer’s warranty with the exception
that the warranty period is 12 months unless the
component is furnished as warranty replacement. Parts
furnished as warranty replacements are warranted for
the remaining term of the original unit warranties.

ENVIRO-TEC
18
FORM ET130.13-NOM3 (1219)
APPENDIX
COMPONENT INSTALLATION, OPERATION & MAINTENANCE MANUALS
Electric Heat Installation, Operation & Maintenance
EC Motor Solo, Select, and Sync PWM Installation, Operation & Maintenance
Analog Thermostats – Data and Instructions
Digital Thermostat (D-Series) – Installation Guide
Digital Thermostat (D-Series) – Operating Manual
Programmable Thermostat (P-Series) – Installation Guide
Programmable Thermostat (P-Series) – Operating Manual
N-Series, F-Series and V-Series TEC3000 Color – Installation Instructions
Return Air Sensor (For Operation With D-Series or P-Series) – Installation Instructions
For the supplemental installation, operation and maintenance manuals listed above, please con-
tact your local Sales Representative or visit www.enviro-tec.com/literature/iom.

ENVIRO-TEC is a registered trademark of Johnson Controls, Inc. in the United States of America and other countries.
Other trademarks used herein may be trademarks or registered trademarks of other companies.
Catalog: ET130.13-NOM3 (1219) Supersedes ET130.13-NOM3 (819)
© 2019 Johnson Controls, Inc. P.O. Box 423, Milwaukee, WI 53201 Printed in USA
www.enviro-tec.com