envirovent QURO Decentralised Mechanical Extract Fan User Guide
- September 20, 2024
- envirovent
Table of Contents
QURO
Decentralised Mechanical Extract Fan
QURO Decentralised Mechanical Extract Fan
Minimum Installation Distances and Orientations
X > 5 cm / 2 inch
QURO QRST (Timer) and QRHT (Relative Humidity Sensor and Timer) models: QURO
QRHTP (Relative Humidity Sensor, Timer and Pullcord) model:
This instruction manual contains important information and must be read
carefully by qualified individuals before any handling, transport, inspection
or installation of the product. While every care has been taken in the
preparation of these instructions and the
information given, it is the responsibility of the installer to ensure that
the system complies with the national and international regulations in force,
particularly those relating to safety. EnviroVent Ltd, accepts no
responsibility for breakages, accidents or other problems due to failure to
follow the instructions in this manual.
The extract fans in the QURO range are manufactured under strict production
and quality control standards, such as ISO 9001. All the components are
checked and all units are tested after assembly.
We recommend that you check that the model is correct and the details on the
marking plate are as required including temperature range and electrical
information.
IMPORTANT: Before proceeding with installation and connection of the
device, make sure that power is switched off at the mains. The ambient
operating temperature must be within the specific limits on the marking plate.
If the extract fan is connected to a duct, it must be used exclusively for the
ventilation system. Do not use this device in explosive or corrosive
atmospheres. If the fan extracts air in a room where a boiler or other
combustion device is installed, make sure that there are sufficient air inlets
and outlets in the room to ensure proper combustion.
Children aged 8 and up can use this device, as can individuals with physical,
sensory or mental disabilities, or who lack experience and knowledge, when
supervised or trained to use the device safely and made aware of the dangers
that may be involved. Children should not be allowed to play with the device.
User cleaning and maintenance should not be done by unsupervised children.
The device can be mounted on the ceiling or wall, with outlet directly outside
or into a dedicated duct. This product is not suitable for use with a Type AC
RCD ⁓.
INSTALLATION
IMPORTANT: The power supply cables must be run through the cable gland
and the cable retention system as shown in labels 5 and 9 in Fig.2. The cross-
section of the power supply cable must be at least 0.5mm². To control the fan
via a Ls, the options shown in Fig. 6, 7 and 8 should be used (depending on
the version chosen).
Parts in Fig 1 and Fig 2:
- Front Cover
- Central cover
- Back cover
- Terminal strip
- Cable gland
- Display
- Air speed sensor
- Humidity sensor
- Cable retention
VERSIONS
The QURO is a decentralised mechanical extract fan designed to operate continuously, providing a constant extraction of air at all times, for better indoor air quality.
- Standard Model with Timer (QRST): This has several operating modes to vary the speed of the fan with over-run timer. The QRST version must be connected as shown in Fig. 6. with hree wires for switching from trickle to boost speeds (external switch and Ls).
- Relative Humidity Sensor Model with Timer (QRHT) : Offering the same features as the QRST version but with a humidity sensor. The QRHT version should use a two- wire connection, as shown in the first diagram in Fig. 7, to be triggered automatically by the humidity sensor (switching from trickle to boost speed). It can also be connected as per the second diagram in Fig.7 if you want to force it to switch to the boost speed with an external switch via the Ls.
- Relative Humidity Sensor Model with Timer and Pull Cord (QRHTP): Offering the same features as the QRHT version, with a pull cord to allow for manual activation of the boost speed. It should be connected with two wires, as shown in the first diagram in Fig. 8, to be triggered automatically by the humidity sensor (increasing the fan speed as required). With the two-wire connection, it can be switched to boost speed using the pull cord. It can also be connected three wires and override the sensor to switch to boost speed using an external switch and Ls (second diagram Fig. 8). It is recommended that a manual override is provided within the UK.
Table of Airflows:
| l/s | m3/h |
|---|---|
| 5 | 18 |
| 8 | 29 |
| 11 | 40 |
| 13 | 47 |
| 16 | 58 |
| 20 | 72 |
| 25 | 90 |
| 30 | 108 |
OPERATING MODES AND MENUS
All QURO models have a 7 segment display containing 3 digits. It has a keypad
with “Enter”, “+” and “-” keys to move through the menus. The display menu is
activated by pressing the “Enter” key and deactivated after 5 seconds if no
further keys are pressed.
The display digits can be reset by pressing the “Enter” key for more than 10
seconds and releasing it.
In the operating instructions, trickle means the lowest speed and boost, the
highest speed.
STEPS TO SET UP THE OPERATING MODES.
To access the menus, press “Enter” to activate the display, then use “+” and
“-” to cycle through the menu. Once the option has been selected, press
‘Enter’ again. The parameter will blink, then press “+” or “-” to change the
values and “Enter” to confirm. TRICKLE SPEED MENU (low speed) (QRST-QRHT-
QRHTP versions) At the default setting, the fan will run continuously at
trickle speed.
- Trickle settings: 5, 8, 11, 13, 16 l/s.
- Factory setting: 8 l/s.
BOOST SPEED MENU (high speed) (QRST-QRHT-QRHTP versions) The fan will switch to high (boost) speed when activated by an external switch (all versions) , and the pull cord is pulled (QRHTP version) or when the relative humidity setpoint is exceeded (QRHT and QRHTP versions). The fan will return to the trickle speed flow rate after the time set in the timer menu has elapsed or the RH/external switch has been deactivated.
- Boost airflow options: From 20 to 30 l/s with 1 l/s steps.
- Factory setting: 25 l/s.
TIMER MENU
(QRST-QRHT-QRHTP versions) The fan will run at the boost speed for the
time set in this menu when the humidity or Ls event ends and before returning
to the trickle speed. For the QRHTP model, if the timer indicates 00 (00
indicates timer off), it will still run for at least 1 minute (only when
the pull cord is activated).
-
Possible options: From 1 to 30 min- utes with 1-minute steps, 00 disables the timer mode.
-
The timer can also be set to Automatic Timer Mode (AT).
Possible options:
– QRHT/QRHTP: If the humidity increases the RH sensor will take over until the humidity decreases. There is no over-run timer when this occurs.
– QRHTP Only: When the pull cord is activated the timer will over-run by 10 minutes.
– All Models when using an external switch (i.e. light switch): -
If the switch is activated for less than 3 minutes the run-on timer will not operate.
-
If the switch is activated for more than 3 minutes and less than 30 minutes the run on timer will be 1/3 of the time period for which the switch was activated.
-
Example: If activated for 3 minutes = 1 minute over-run, if activated for 15 minutes = 5 minute over=run.
– If more than 30 minutes the timer will over-run by 10 minutes. This is the maximum over-run period.
RELATIVE HUMIDITY MENU(QRHT-QRHTP versions)
The fan will increase in speed when the Relative Humidity (RH) setpoint is exceeded.
- Possible options: From 00 to 90 with 5% steps. Setpoint range: 60, 65, 75, 80, 85, 90 or Automatic Intelligent Humidity mode (AHT) (00 disables this operating mode).
- Automatic Intelligent Humidity Mode: The timer is disabled in RH mode as the operation is fully automatic.
- Factory setting: 70%.
OPERATING INFORMATION MENU
(QRST-QRHT-QRHTP versions)
This menu will be activated when any key is pressed for more than 3 seconds
and released. This menu shows the running time (years, weeks, days and hours),
the instantaneous flow rate, the relative humidity (QRHT versions only) and if
there are any errors.
- Total Run Time & Test:
− Product operating time (motor running):
Years: shows how long the device has been running, from 00 to 99 years. Sample display “Y-02” = 2 years.
Weeks: From 00 to 52. Sample display “W-01” = 1 week.
Days: From 00 to 07. Sample display “d-03” = 3 days.
Hours: From 00 to 23. Sample display “h-18” = 18 hours.
Therefore, this menu shows the years, months, weeks, days and hours that the
product has been in operation since its installation and, in this example, it
would be: 2 years + 1 week + 3 days + 18 hours.
The display would look like this: − Flow rate reading: If the flow rate
reading is less than 4 l/s it is displayed as F-Lo. Relative humidity reading
(%) (QRHT and QRHTP versions): If the relative humidity reading (%) is less
than 45%, it is shown as H-Lo.
- Errors: Shown by priority from E-01 to E-03. If there is more than one at a time, they are displayed in order of highest priority.
− E-00 = No error
− E-01 = Motor error
− E-02 = Electronic error
− E-03 = Speed sensor or installation error.
RISKS TO CONSIDER
- Incorrect installation or use is a safety risk.
- Operating temperatures: indicated on the fan marking plate. Do not exceed these limits. The air to be moved must be free of chemical particles that could damage the product materials.
- Foreign bodies: make sure that no objects or mounting materials that can be sucked in or dislodged are left in the fan area. If the fan is connected to ducts, check that they are clean before connecting.
- Electrical hazards: do not exceed the values indicated on the marking plate. Check the electrical connection and make sure it matches the product instructions before switching on the fan for the first time.
- The unit needs to be connected to an appropriately protected circuit as per local regulations.
- Mechanical risk: The fan must be installed on a solid base, level with the correct direction of airflow. Use any accessories necessary to ensure proper, safe assembly and do not leave any parts unassem- bled as this could compromise the safety of the product.
Do not touch the blade when in motion.
TRANSPORT, HANDLING
The packaging for this device has been designed to withstand normal transport conditions and to protect it from dirt. The device must only be transported in its original packaging, otherwise it may be damaged or warped. Do not accept any device that is not in its original packaging or that shows signs of having been tampered with. Avoid impact and dropping. Do not place excessive weight on top of the packaging.
MAINTENANCE
Before handling the device, make sure that it is disconnected from the mains, even if it is switched off. The device should be inspected regularly in order to avoid the accumulation of dirt. How often inspection is required will depend on the working conditions. Clean the humidistat and air flow sensor with a dry cloth or hoover. Make sure that these sensors are free of any kind of dirt.
DECOMMISSIONING AND RECYCLING
The WEEE directive and our commitment to future generations oblige us to
recycle. Please do not forget to dispose of all leftover packaging materials
in the appropriate recycling bins. The extract fan consists mainly of steel
and plastic. The parts should be separated for recycling into the following
categories:
– Steel and iron
– Plastics
– Electronic scrap materials
Due to our policy of continuous innovation and improvement EnviroVent reserves
the right to alter products specification and appearance without notice.
We want to hear from you Your feedback is important to us as we strive to
improve our products, services, and overall customer experience.
Please email us to help us serve you better:
feedback@envirovent.com
WARRANTY CONDITIONS & EXCLUSIONS
Warranty Conditions & Exclusions
Please note that a receipt will be required as proof of purchase. Products
bought from an unapproved source, including but not limited to auction
websites, are not covered by the warranty.
- The system must be correctly installed and operated according to the instructions contained in the user guide supplied.
- The warranty will be rendered invalid if the system has been serviced, maintained, repaired, taken apart or tampered with by any person not authorized, which in any way contradicts the instruction guide set out by EnviroVent.
- The warranty does not cover accidental damage, misuse or abuse.
- The warranty is in addition to your statutory or legal rights.
For warranty conditions and exclusions, visit www.envirovent.com/warranty
EnviroVent Ltd
Harrogate West Business Park
Unit 1 Bardner Bank
Killinghall
Harrogate
HG3 2SP
01423 810 810
info@envirovent.com
www.envirovent.com
Ref. 9023128300
Documents / Resources
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envirovent QURO Decentralised Mechanical Extract
Fan
[pdf] User Guide
QURO Decentralised Mechanical Extract Fan, QURO, Decentralised Mechanical
Extract Fan, Mechanical Extract Fan, Extract Fan, Fan
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