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Enviro CFR - User Manual

Enviro CFR
32 pages
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December, 2005 • Part No. PX-00-0005

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Questions and Answers

  • C
    carpenterjohnAug 22, 2025
    Why does my Enviro Fan motor overheat?
    • C
      Cindy GloverAug 22, 2025
      If your Enviro Fan motor overheats, it could be due to several reasons. First, the motor might be overloaded, in which case you should reduce the load or consider replacing it with a larger motor. Another cause could be that the motor fan is clogged with dirt, preventing proper ventilation. To resolve this, remove the fan cover, clean the fan, and then replace the cover. In some cases, it may be necessary to replace the motor. Also, check for a lack of required external static pressure and add the necessary amount.
  • R
    Rachel JohnsonSep 18, 2025
    Why there is excessive motor noise in Enviro CFR Touch terminals?
    • D
      Dawn WoodsSep 18, 2025
      Excessive motor noise in Enviro Touch terminals could be due to: * Loose motor mounting bolts: Tighten the motor mounting bolts. * Fan wheel rubbing on the fan housing: Align the wheel in the housing. * Loose fan wheel: Align and tighten.
  • J
    Joshua SosaSep 16, 2025
    What causes poor performance in Enviro Touch terminals?
    • G
      Gary BrownSep 16, 2025
      Poor performance in Enviro Touch terminals can be attributed to: * Lack of required external static pressure: Add the required external static pressure. * Wrong Program: Contact Factory.
  • A
    Andrea NicholsSep 14, 2025
    What to do if Enviro CFR heater with SSR does not operate?
    • S
      Samuel Goodwin DDSSep 14, 2025
      If the heater with SSR in your Enviro Touch terminals does not operate, check: * Incorrect Signal Applied: Verify the signal input. * Interface Board Fuse Blown: Replace the fuse.
  • D
    Douglas RogersSep 13, 2025
    What causes low or high temperature rise in Enviro CFR Touch terminals?
    • B
      Benjamin CrossSep 13, 2025
      Low or high temperature rise in Enviro Touch terminals could stem from: * Incompatible Thermostat or Controller: Check the wiring. * Problems with Additional Stages: Check the location of the thermostat; it might be installed in a “too hot” or “too cold” location. Also, check the heat outputs on the controller. * Incorrect CFM: Check for blocked ducts or the location of the heater.
  • B
    bwattsSep 12, 2025
    How to solve low coil capacity in Enviro CFR?
    • C
      Caroline SmithSep 12, 2025
      Low coil capacity in Enviro Touch terminals might be due to: * Incorrect airflow: Check the fan’s operating conditions. * Incorrect GPM: Check water pumps, valves, and lines for obstructions. * Dirty coil fins: Clean the coil fins. * Dirty filter (where applicable): Replace the filter. * Incorrect water temperature: Provide the proper water temperature.
  • D
    Douglas ScottSep 9, 2025
    Why Enviro CFR Touch terminals heater does not operate?
    • T
      Tara CrawfordSep 9, 2025
      If the heater in your Enviro Touch terminals does not operate, consider these potential causes: * No Power: Check the disconnect. * No Control Voltage: Check the transformer and transformer fusing (if applicable) and replace if necessary. * Blown Fuse: Replace the fuse. * Open Limit (primary or secondary): Replace the limits or reset as applicable. * Airflow Incorrect Direction: Check the sensing tube, red tube = high and black tube = low, rotate if needed. * Low External Static Pressure: Increase airflow to obtain a minimum of .1 in. w.c. external static. * Damaged elements: Check for open or damaged elements and replace as necessary.
  • C
    cwatsonSep 7, 2025
    How to fix excessive motor noise in Enviro Touch terminals?
    • C
      Cheryl MillerSep 7, 2025
      Excessive motor noise in Enviro Touch terminals can be caused by: * Loose motor mounting bolts: Tighten the motor mounting bolts. * Fan wheel rubbing on the fan housing: Align the wheel in the housing. * Loose fan wheel: Align and tighten the fan wheel. * SCR set too low: Select a lower tap to reduce motor speed and re-adjust the fan SCR.
  • C
    Christine KingSep 5, 2025
    What to do if Enviro Touch terminals motor surges?
    • A
      ashleydiazSep 5, 2025
      If your Enviro Touch terminals motor surges, it could be due to: * Fan CFM adjustment voltage outside the range of the Fan Calibration Curve: Adjust the voltage to a value within the range of the Fan Calibration Curve. * ESP (external static pressure) too high: Verify balancing dampers are as open as possible (at least one should be fully open). Verify the radiated sound damper (if supplied) swings freely. Verify the plenum opening is unobstructed. Verify the filter (if supplied) is not dirty and does not obstruct the flow of plenum air.
  • T
    Tara GrantSep 4, 2025
    Why is my Enviro CFR motor overheating?
    • L
      Laura SmithSep 4, 2025
      Your Enviro Touch terminals motor could be overheating due to: * An overloaded motor: Reduce the load or replace it with a larger motor (refer to the factory). * A motor fan clogged with dirt preventing proper ventilation: Remove the fan cover, clean the fan, and replace the cover. Replacing the motor might be necessary. * Lack of required external static pressure: Add the required external static pressure.

Summary

Features and Benefits

Occupant-Sensitive Design

Focuses on eliminating fan noise and providing constant air motion for occupant comfort.

Building Designer Flexibility

Highlights flexibility in system design, reduced noise, and shallow casing height.

Construction Features

Unit Construction Details

Describes casing material, insulation, access panels, and damper construction for durability.

Accurate Airflow Control

FlowStar Sensor Technology

Explains the multi-axis sensor design for accurate airflow measurement and signal amplification.

Energy Savings and IAQ Benefits

Details how the sensor enables lower minimum CFM setpoints, reducing energy use and improving IAQ.

Application and Selection Guidance

Series Flow Fan Terminal Purpose

Describes terminals offering improved space comfort, flexibility, and operating savings.

Primary Airflow Calibration

FlowStar Calibration Chart

Provides a chart for calibrating airflow based on probe differential pressure for various unit sizes.

General Selection Data (PSC Motor)

Unit Selection Table with NC Criteria

Provides unit sizes, CFM, E.S.P., room noise criteria, and horsepower/amperage data.

Fan Performance, PSC Motor

General Fan Performance Note

Explains how to read fan curves for PSC motors and selection guidelines.

Fan Curves: Unit Sizes 0404-1011

Displays E.S.P. vs. Airflow curves for smaller unit sizes with different motor taps.

Fan Performance, PSC Motor (cont.)

Fan Curves: Unit Sizes 0818-1421

Displays E.S.P. vs. Airflow curves for mid-range unit sizes with different motor taps.

Fan Curves: Unit Sizes 1224-1630

Displays E.S.P. vs. Airflow curves for larger unit sizes with different motor taps.

Fan Curves: Unit Sizes 1440-1844

Displays E.S.P. vs. Airflow curves for larger unit sizes with different motor taps.

ECM Fan Motor Option

ECM Motor Energy Efficiency

Highlights the high efficiency and energy savings of ECM motors compared to PSC motors.

Pressure Independent Fan Volume

Explains the sensorless airflow control that maintains constant volume despite pressure changes.

General Selection Data (ECM Motor)

Unit Selection Table with NC Criteria (ECM)

Provides unit sizes, CFM, E.S.P., and noise criteria for ECM motor applications.

Fan Performance, ECM Motor

ECM Fan Performance Note

Explains how to read fan curves for ECM motors and selection guidelines.

ECM Fan Curves: Unit Sizes 0611-1421

Displays E.S.P. vs. Airflow curves for ECM motor units across various sizes.

ECM Fan Curves: Unit Sizes 1440-1640

Displays E.S.P. vs. Airflow curves for ECM motor units across various sizes.

Electric Heat

Hot Water Coil Data

Hot Water Coil Data (cont.)

Enviro CFR Specifications

General IconGeneral
BrandEnviro
ModelCFR
CategoryTouch terminals
LanguageEnglish