EnviroVent energiSava® 260 Wall Mounted Installation Guide

Safety

Read and understand these instructions carefully before beginning installation. The unit should only be installed by a competent person.

Electrical Connection

The unit requires a continuous electrical power supply. Connection to the fixed wiring must be made outside the unit in a suitable location. The unit must be able to be disconnected from the mains supply after installation. The unit must be earthed and a suitable isolator having a minimum contact separation of 3.0mm must be used to provide isolation for the unit.

The power cable running into the unit must remain the supplied flexible cable. If the power cable becomes damaged, it must be replaced by EnviroVent, an authorised service agent for your region/country, or a similarly qualified person in order to avoid a hazard.

Do not remove or tamper with any electronic components inside the unit.

All wiring must comply with Building Regulations and the current IET Wiring Regulations (BS7671 in the UK) or equivalent standards for other countries. The final installation should be examined and tested by a qualified electrician.

This product is not suitable for use with a Type AC RCD ⚡.

Location

Check there is space for the unit in your chosen location including room for access and future servicing of the unit. The unit must not affect the operation of open-flue appliances. Consider the external vent locations in relation to open-flues from appliances e.g. boilers. You must ensure the external supply grilles are positioned away from open flues to avoid drawing harmful gases into the property. Consult your local regulations or a qualified gas engineer. EnviroVent recommends at least 2m clearance.

Users

This unit is not intended for use by persons [including children] with reduced physical, sensory or mental capabilities or lack of experience and knowledge, unless they have been given supervision and usage instruction by a person responsible for their safety. Children should be supervised to ensure they do not play with the unit. Cleaning and user maintenance must not be performed by children.

Diagrams

Overall unit dimensions and minimum area required for access & maintenance (mm).

A diagram shows the unit dimensions: 560mm width, 1135mm height (including spigots), 280mm depth. The diagram also indicates clearance requirements: 300mm above, 200mm below, and 580mm depth for access. The energiSava® 260 spigots are compatible with ø125mm duct.

Wiring Diagram

A wiring diagram illustrates the connection of the MVHR unit to a local isolator and the mains supply (230V 50/60Hz). It shows connections for Neutral (N), Live (L), and Switched Live (Ls) using color-coded wires (Blue, Green & Yellow, Brown, Black). A switch live connection is optional.

The local isolator must be connected to the mains as part of the fixed wiring. Connect the cores of the power cable to the matching terminals on the local isolator (3A fuse spur or similar).

The black switch live core of the mains cable can be wired to a switch input such as a light switch. When the switch is turned on, the boost function is engaged. When the switch is turned off, the unit will return to normal running mode. In this configuration a triple pole isolator must be used.

About the energiSava® 260

The energiSava® 260 is an MVHR unit (Mechanical Ventilation with Heat Recovery). It is ideal for medium to large sized properties with a kitchen and up to 5 additional wet rooms. The unit is capable of delivering a maximum airflow of 86l/s (310m³/hr) and a maximum system pressure in excess of 390Pa.

The unit helps create a fresh and healthy living environment by supplying filtered air into a property through supply valves. Moist, stale air is removed out of the property through extract valves.

The heat exchanger inside the unit transfers waste heat energy from the extracted air to the supplied air to improve thermal efficiency and reduce heating costs.

When outdoor temperatures are low, the frost protection feature automatically reduces the supply air flow rate to ensure the heat exchanger does not freeze.

The Intellitrac® humidity tracking function monitors humidity levels in the extracted air and automatically increases supply and extract air flow rates when humidity levels rise. Once humidity levels are lower, air flow rates return to normal.

The automatic thermal bypass helps control the temperature of air entering the home on warmer days.

The energiSava® 260 includes a switch live function. When wired through a lighting switch (e.g., in a bathroom), the unit enters boost mode when the light is turned on.

Box Contents

energiSava® 260

• 1x energiSava® 260 unit
• 1x Remote control
• 1x Instruction guide
• 1x User guide
• 1x Wall mounting bracket
• 5x Screws 8g x 2.0"
• 5x Plasterboard plugs
• 2x Wall mount spacers
• 2x Screws 10g x 0.5"

energiSava® 260 App

• 1x energiSava® 260 app unit
• 1x Instruction guide
• 1x User guide
• 1x App guide
• 1x Wall mounting bracket
• 5x Screws 8g x 2.0"
• 5x Plasterboard plugs
• 2x Wall mount spacers
• 2x Screws 10g x 0.5"

energiSava® 260 Basic/Remote Switch

• 1x energiSava® 260 unit
• 1x Wired Remote Switch (RS only)
• 1x Instruction guide
• 1x User guide
• 1x Wall mounting bracket
• 5x Screws 8g x 2.0"
• 5x Plasterboard plugs
• 2x Wall mount spacers
• 2x Screws 10g x 0.5"

Pre - Installation Checklist

• Does the unit fit in the space where it will be installed?
• Is there room to connect ducts to the spigots without tight duct bends?
• Is there room to access and replace the filters after installation?
• Are there any obstructions above or below the locations where the input and extract valves are to be fitted?
• Is the mounting surface strong enough to support the unit?
• Is the mounting surface level?
• Are there adequate facilities to connect the unit condensate drain to the internal waste system of the property?

Installation

1. Hold the unit in the chosen location and check there is space for ducts, condensate drainage, filter and keypad access.
2. Once you are satisfied with the position, fix the wall bracket in place. Use 5 8gx2.0" screws and 5 plasterboard plugs.
3. Attach the two wall spacers to the back of the unit to ensure condensate drains correctly. Use 2 10gx0.5" screws.
4. Place the unit onto the wall bracket. Secure the tie-down cable flush to the wall to prevent accidental movement.
5. Make a water-tight connection between the drainage connector and the property's waste water system. A suitable non-return device must be fitted to prevent backflow. The drainage must have a minimum 5-degree fall away from the unit.

Duct Path Connection

Left Hand Units (-L)

Diagrams show supply from atmosphere to property and extract to atmosphere.

Right Hand Units

Diagrams show supply from atmosphere to property and extract from property to atmosphere.

Wiring and Power Connection

With the mains supply isolated, wire the unit to the local isolator as per the wiring diagram and local wiring regulations. Upon powering on, air will flow into the property after a few seconds.

Remote Switch Installation (-RS)

1. Open the switch, ensuring the ribbon cable remains connected to the PCB.
2. Screw the switch to the wall in an accessible location.
3. Replace the lid and tighten the two screws.

Ductwork Installation

Ductwork should be fitted in accordance with Approved Document F of building regulations. Ducts to and from atmosphere and through unheated spaces need to be insulated.

All ductwork should be as large a diameter as possible (min. 125mm) and use rigid duct or a suitable semi-rigid duct system such as EnviroVent Fast Track.

Diagrams illustrate duct routing for supply and extract air within a house structure.

Commissioning

All maintenance and building works should be complete before commissioning. Do not commission the MVHR unit until it is fully installed, including power, ductwork, internal valves, and external vents.

MVHR systems must be commissioned in accordance with Approved Document F of the Building Regulations for England and Wales. For other countries, refer to local Building Regulations.

• Determine required ventilation rates per Approved Document F.
• Press the SET button for 4 seconds to enter commissioning mode (humidity and temperature sensor input is temporarily disabled).
• LEDs B, C, D will light, and LED A will flash, indicating extract boost flow rate modification.
• Fully open all supply/extract valves and measure air flow rates at all system extract points using a calibrated air flow meter (l/s or m³/hr).
• Sum the extract rates from all rooms and compare to the calculated whole building boost extract ventilation rate.
• Use the + and - buttons to adjust flow rates to meet the calculated rate.

Adjusting Individual Valves

• Adjust individual valves to extract at the appropriate rate for each wet room.
• Press SET to move to the next flow rate. The flashing LED indicates the current flow rate being modified (A: Extract Boost, B: Supply Boost, C: Extract Trickle, D: Supply Trickle, AC: Speed Three Extract, BD: Speed Three Supply).

Commissioning Steps

When commissioning is complete, press SET for 4 seconds to return to normal running mode. If not done, the unit returns automatically after 60 minutes of inactivity, saving current settings.

Wi-Fi App myenvirovent

App-enabled units can be controlled using the myenvirovent app on Apple and Android devices. A separate instruction guide for the app is included in the box or accessible within the app. Refer to this guide for connection and further settings. SSID and password information is on the back page of the app guide and on a label attached to the unit.

Screenshots of the app interface are provided.

Wireless Remote Control

Remote Control Layout

Diagrams identify controls: Filter LED, Button LED 1, Remote control button, Summer Bypass LED, Boost LED, Button LED 2, Humidity LED, Frost LED, and Auto/Manual settings.

Viewing Unit Status

Press any button to wake the remote; relevant LEDs will light up according to the current status.

Activating/Deactivating Speed Functions

• Boost Mode: Press any button to wake. Press again; Boost LED flashes red. After 2 seconds, unit enters boost mode for 20 minutes, then returns to trickle. Repeat to deactivate.
• Speed Three: Press any button to wake. Press twice more to activate. Top two LEDs flash, then solid. Unit enters speed three for up to 8 hours. Pressing the button again after waking deactivates speed three.

Boost cannot be cancelled if switch live is on until switch live is turned off. Speed three cannot be activated while the unit is in boost mode, and vice versa.

Summer Bypass Functions

• Manual Activation/Deactivation: Wake remote. Press button twice more. Bypass LED flashes red. Unit enters bypass mode for 24 hours, then returns to normal. Repeat to deactivate.
• Switching Modes: Wake remote. Press and hold button for 5 seconds (Filter LED flashes green). Press once to edit bypass mode. Press and hold for 5 seconds to switch between modes. Auto = Bypass LED constant, Manual = Bypass LED flashing.

Filter Indicator and Reset

• If Filter LED flashes green upon waking, filters need replacement. Contact EnviroVent.
• After replacement, wake remote. Press and hold button for 5 seconds (Filter LED flashes green). Press and hold again for 5 seconds to reset the filter (Filter LED flashes rapidly for 2 seconds).

Pairing an Extra Remote Control

1. Turn the unit off at the isolation point.
2. Restore power. The unit is in pairing mode for 20 seconds.
3. Press the button on the new remote control once within 20 seconds to pair.
4. If LED 2 lights green, pairing succeeded.

Reset/Wipe Remote Control Memory

• Press the '+' button on the unit control panel for 10 seconds. LEDs A, B, C, and D flash.
• Press the button on any EnviroVent wireless remote control. Memory of linked remotes is wiped.

Fault Indication

If all LEDs flash red upon waking the remote, a fault has occurred. Contact EnviroVent on 01423 810 810 if the issue persists.

Remote Control Battery Replacement

Remove two screws, open the remote. Battery is on the back of the front cover. Replace with 1x CR2032 battery. Clip rear cover back on. The switch remains paired. Dispose of the battery safely.

Technical Specification

Airflow Performance

A graph shows Airflow (l/s) on the x-axis and Ps (pa) on the y-axis, illustrating the unit's performance curve.

Post-Installation Checklist

• Installation instructions understood. Contact EnviroVent for technical help.
• Ductwork diameter is 125mm or larger.
• Minimal flexible duct used.
• All ducts, valves, vents, and drainage points connected, mechanically fixed, and sealed.
• Both filters inserted correctly.
• Unit securely fixed with adequate servicing space.
• Condensate drain connected to waste water system with a non-return device; pipework water tested.
• All major building works completed before commissioning.
• Supply and extract air flow rates commissioned to meet Approved Document F.
• Commissioning air flow rate data recorded.
• Occupants familiarised with system operation and maintenance.

Filter Maintenance

EnviroVent recommends regular filter checks and replacement. Isolate the unit from the mains before replacing or cleaning filters.

Areas with high particulate matter may require more frequent filter replacement. Use only genuine EnviroVent replacement filters.

Failure to maintain the unit as recommended may breach the warranty terms. See warranty for details.

Remove filter caps, replace filters, and reinsert caps.

Reset filter indication by pressing the minus button for 10 seconds after engaging the mains supply. Filter change indication can also be reset via the remote control.

Diagrams show filter replacement and filter indication panel.

Spares/Accessories

Warranty

EnviroVent products are designed and manufactured in Harrogate, North Yorkshire. The unit is covered by a 2-year warranty, subject to filter replacement every 12 months or as needed. Do not dismantle or remove parts not instructed in this guide; tampering voids the warranty. Periodically check valves to ensure air flow.

EnviroVent Supply & Installation

Products supplied and installed by EnviroVent Ltd have a two-year parts and labour warranty. Contact EnviroVent on 01423 810 810 for faults. Guidance or site visits may be arranged (call-out charges may apply).

Supply Only

Products supplied by EnviroVent and installed by a third party have a two-year parts only warranty. If a fault occurs and installation followed instructions, return the product to the place of purchase for replacement.

Warranty Conditions & Exclusions

• A receipt is required as proof of purchase. Products from unapproved sources are not covered.
• The system must be installed and operated according to the user guide.
• Warranty is invalid if the system is serviced, maintained, repaired, or tampered with by unauthorized persons.
• Warranty does not cover accidental damage, misuse, or abuse.
• Warranty is in addition to statutory or legal rights.

Your unit serial number: [Serial Number Placeholder]

For warranty conditions and exclusions, visit www.envirovent.com/warranty.