1. Product Overview
The Fantech EDF7 Electronic Multifunction Dehumidistat is designed for use with all Fantech HRV/ERV units, with the exception of the SH/VH 704 models. This advanced control offers three distinct modes of operation: ventilation, recirculation, and standby, providing comprehensive air quality management for your space.
Key features of the EDF7 Dehumidistat include:
- Adjustable Relative Humidity (RH) set point for precise control.
- User-selectable fan speeds: Low, Medium, Normal, and a 20 minutes per hour cycle.
- A dedicated Summer setting to deactivate dehumidification when not needed.
- An LED backlit screen for clear visibility of settings and readings.
- Continuous display of indoor Relative Humidity.
Figure 1: Front view of the Fantech EDF7 Electronic Multifunction Dehumidistat. The control panel features an upper section for 'OVERRIDE CONTROLS' including humidity adjustment buttons and a digital display for humidity. The lower section, 'MODE CONTROLS', includes buttons for Power, Modes, Mode Speed, and Cycle, along with indicators for filter status and various operational states.
2. Installation and Setup
The Fantech EDF7 Dehumidistat is designed for wall-mounted installation and requires connection to a compatible Fantech HRV/ERV unit. For optimal performance and safety, it is highly recommended that installation be performed by a qualified HVAC professional or a certified electrician.
2.1 Pre-Installation Checklist
- Ensure power to the HRV/ERV unit is disconnected at the circuit breaker before beginning installation.
- Verify compatibility with your Fantech HRV/ERV model (not compatible with SH/VH 704).
- Gather necessary tools: screwdriver, wire strippers, drill (if mounting new location).
2.2 Wiring Instructions
Refer to the wiring diagram provided with your Fantech HRV/ERV unit and the EDF7 packaging for specific connection points. Generally, the dehumidistat connects to the low-voltage control terminals of the HRV/ERV unit. Ensure all connections are secure and follow local electrical codes.
Note: Incorrect wiring can damage the unit or pose a safety hazard. If unsure, consult a professional.
2.3 Initial Power-Up
After installation and wiring are complete, restore power to the HRV/ERV unit. The EDF7's LED backlit screen should illuminate, displaying the current indoor relative humidity.
3. Operating Instructions
The EDF7 Dehumidistat provides intuitive control over your ventilation system. Familiarize yourself with the control panel as shown in Figure 1.
3.1 Powering On/Off
- Locate the POWER button on the lower left of the control panel.
- Press the POWER button to toggle the unit on or off. When on, the screen will display the current humidity.
3.2 Selecting Operating Modes
The EDF7 offers three primary operating modes:
- Ventilation Mode: Continuously exchanges indoor air with fresh outdoor air.
- Recirculation Mode: Filters and circulates indoor air without introducing outdoor air.
- Standby Mode: The unit is idle, only activating if specific conditions (e.g., high humidity) trigger an override.
To change modes, press the MODES button (located next to the Power button) repeatedly until the desired mode indicator illuminates on the display.
3.3 Adjusting Humidity Set Point
The dehumidistat allows you to set a desired relative humidity level. When the indoor humidity exceeds this set point, the unit will activate to reduce humidity.
- In the upper section of the control panel, locate the HUMIDITY display and the adjacent up (▲) and down (▼) arrow buttons.
- Press the up or down arrow buttons to increase or decrease the desired humidity set point. The new setting will be displayed temporarily.
3.4 Fan Speed Control
The EDF7 offers four fan speed settings:
- Low: Minimum airflow, quiet operation.
- Medium: Moderate airflow.
- Normal: Standard operating airflow.
- 20 Minutes per Hour: Operates for 20 minutes within each hour, then pauses.
To adjust the fan speed, press the MODE SPEED button (located in the lower section) repeatedly until the indicator for the desired speed is lit.
3.5 Summer Setting
During summer months when dehumidification is not required, you can activate the Summer setting to prevent the unit from operating based on humidity levels.
- Consult your HRV/ERV unit's manual for specific instructions on activating the Summer setting via the EDF7, as this may involve a combination of button presses or a dedicated setting within the 'MODES' cycle.
- When active, the dehumidification function will be deactivated, saving energy.
3.6 Override Controls
The upper section of the control panel features override controls, allowing for temporary adjustments or activation of specific functions regardless of the current mode or humidity settings. These typically include timed boosts or specific cycle activations. Refer to your HRV/ERV unit's comprehensive manual for detailed use of these override functions.
4. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Fantech EDF7 Dehumidistat and connected HRV/ERV system.
4.1 Cleaning the Dehumidistat
- Wipe the surface of the control panel with a soft, damp cloth.
- Do not use abrasive cleaners, solvents, or excessive moisture, as these can damage the display or internal components.
- Ensure the unit is powered off before cleaning.
4.2 Filter Maintenance (HRV/ERV Unit)
The EDF7 control panel includes a FILTER indicator (as seen in Figure 1). This light illuminates to remind you to check and clean or replace the filters in your connected Fantech HRV/ERV unit. Refer to your HRV/ERV unit's manual for specific filter maintenance procedures and schedules.
Important: Neglecting filter maintenance can reduce system efficiency and air quality.
5. Troubleshooting
If you experience issues with your Fantech EDF7 Dehumidistat, try the following common troubleshooting steps. For more complex issues, consult a qualified technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Dehumidistat display is off. | No power to the unit or HRV/ERV. | Check the circuit breaker for the HRV/ERV unit. Ensure the dehumidistat is properly wired. Press the POWER button. |
| Unit not responding to humidity settings. | Summer setting active; incorrect humidity set point; HRV/ERV unit malfunction. | Deactivate Summer setting. Adjust humidity set point lower than current indoor humidity. Consult HRV/ERV manual for troubleshooting its operation. |
| Fan speed not changing. | Incorrect button press; HRV/ERV unit issue. | Ensure you are pressing the MODE SPEED button. Check HRV/ERV unit for errors or blockages. |
| FILTER indicator light is on. | HRV/ERV filters are dirty or need replacement. | Clean or replace the filters in your Fantech HRV/ERV unit as per its manual. Reset the filter indicator if applicable (refer to HRV/ERV manual). |
6. Product Specifications
| Feature | Detail |
|---|---|
| Model Number | EDF7 |
| Brand | FANTECH |
| Compatibility | All Fantech HRV/ERV units (except SH/VH 704) |
| Operating Modes | Ventilation, Recirculation, Standby |
| Number of Speeds | 4 (Low, Medium, Normal, 20 min/hr) |
| Display | LED Backlit, displays Indoor Relative Humidity |
| Color | White |
| Included Components | Controller |
| Package Dimensions | 5.51 x 4.41 x 1.65 inches |
| Item Weight | 4.94 ounces |
| UPC | 650737448837 |
7. Warranty Information
Specific warranty terms and conditions for the Fantech EDF7 Electronic Multifunction Dehumidistat are provided by the manufacturer. Please refer to the warranty card included with your product packaging or visit the official Fantech website for detailed warranty coverage, duration, and claim procedures.
Note: Keep your proof of purchase for warranty claims.
8. Customer Support
For technical assistance, replacement parts, or further inquiries regarding your Fantech EDF7 Dehumidistat, please contact Fantech customer support.
- Fantech Official Website: www.fantech.net (Please note: This is a generic placeholder for Fantech's website, actual URL may vary. Refer to product packaging for precise contact information.)
- Contact Information: Refer to the Fantech website or product documentation for phone numbers and email addresses.
When contacting support, please have your product model number (EDF7) and purchase date available.
