heat recovery units

The Villavent central extract system is developed for continuous use and with a minimum of maintenance and service.

	1.	Cleaning the extract filter - as necessary, normally every four months. (a) The aluminium grease filter on the extract side inside the unit must be cleaned regularly. Wash in hot soapy water or in the dish washer. (b) Do not use detergent containing ammonia. (c) Replace the filter when necessary. Click here to view heat recovery spare parts.
	2.	Bag Filter The bag filter cannot be cleaned and must be changed as necessary. Click here to view heat recovery spare parts.
	3.	Checking the heat exchanger block - once a year Even if the required maintenance in items 1 and 2 above is carried out, dust may build up in the exchanger block. It is therefore of vital importance for the upkeep of high efficiency that the exchanger block is removed from the unit and cleaned periodically. Wash in hot soapy water. Do not use detergent containing ammonia.
	4.	Checking the fans - once a year Even if the required maintenance, such as cleaning/changing of filters is carried out, dust and grease may slowly build up inside the fans. This will reduce efficiency. The fans should be gently scraped using a non metallic scraper eg body of a bic biro.
	5.	Checking condensate drain - once a year Condensate drain (drain pipe) may after some time get blocked by particles from the extract air. Check that the drain pipe is open by pouring some water into the condensate tray in the bottom of the unit. Clean the water lock and drain pipe as necessary.
	6.	Cleaning extract louvers and inlet diffusers - as necessary The system supplies fresh air to your home and extracts the used indoor air via the duct system and diffusers/louvers. Diffusers and louvers are mounted in ceilings/walls in bedrooms, living room, wet rooms, WC etc. Remove diffusers and louvers and wash in hot soapy water as required. Diffusers/louvers must not be exchanged.
	7.	Checking the fresh air intake Leaves and pollution could plug up the air intake grille and reduce the capacity. Check the air intake grille at least twice year, and clean as necessary.

Troubleshooting / Service [back to top]

Should problems occur please refer to the items below before calling our service representative.

	1.	Fan(s) Do Not Start Check that all fuses and plugs are connected (mains supply and fan plugs).
	2.	Reduced Airflow (a) Check the setting of airflow on control panel. (b) Ensure the motors are running. (c) Change/clean of filter if required. (d) Clean diffusers/louvers if required. (e) Cleaning of fans/exchanger block required. (f) Is roof unit/air intake blocked? (g) Duct system - check visible duct runs for damage and/or build up of dust/pollution. (h) Check diffuser/louver openings for blockages/dust build up.
	3.	Cold Supply Air (a) Check the supply air temperature on the control panel. (b) Clean the extract filter if required. (c) Ice in exchanger block. Turn off the unit and let the ice melt. Call your service engineer if this is repeated. (d) Check if summerblock is installed in the unit - if so remove and replace with heat exchanger block.
	4.	Noise / Vibrations (a) Carry out all checks as for reduced airflow (in particular extract fans). (b) Clean the fan impellers. (c) Remove the fans and check that the screws holding the fans are tightened. (d) Check if the unit is free standing and that anti-vibration pads are installed under the unit.
	5.	Water Leakage (a) Check that the condensate pipe is installed with a gradient toward the drainage point. (b) Check that free standing units are installed with a gradient toward the condensate drain (c) If installed in a space likely to experience temperatures below freezing ensure condensate pipe is insulated.
	6.	Service Before calling our service representative make a note of the specification and production number, this can be seen on data the data plate which is situated on the unit.

If you would like more information on Villavent^Ž products and services please call 01993 778481 or contact us.