11
In order to prevent the Heat Exchanger from freezing when the outside temperature is low, a frost protection monitor has been integrated
Factory setting (No user adjustment):
If the temperature in the outgoing air duct falls below 4°C the supply air Fan will stop (the exhaust air Fan will remain on). When the outgoing air temperature reaches 7°C
again the supply air Fan comes back on automatically.
Fan fault safety shut down
Should the supply air Fan fail the exhaust air Fan will switch off automatically.
9. Pre Heater Accessory
When the incoming air temperature drops below the set temperature
(0°C to 3°C), the Defrost Pre-Heater Unit will switch on and warm the incoming air prior to it arriving at the MVHR to pre-
vent ice forming
within Exchanger.
When the incoming air temperature rises above the set temp. (0°C to 3°C), the defrost heater unit will switch off.
10. Maintenance
10.1 Filters
The MVHR should never be operated without Filters. However, depending on the actual volume of contaminants
in the environment, the MVHR Filters need to be checked and cleaned at least twice a year and replaced at least on an annual basis. The original external / exhaust F5
quilted filters are enclosed in a frame. Contact details for purchasing new filters or servicing by Xpelair approved technicians can be found on the back of this booklet.
10.1.1 Removing and re-fitting the filters
Important:
A planned filter replacement regime protects the recuperator from needing to be cleaned.
Before removing the recuperator disconnect the MVHR from the mains supply.
1. Remove filter access covers using finger grip
2. Remove the two Filters
3. Insert cleaned or new Filters. Filters can be cleaned by gently knocking together to remove dust/dirt
4. Replace the Access covers
5. The MVHR is ready to recommence operation.
11. Air Filter Box (Optional accessory)
The MVHR is fitted with F5 Filters as standard. To protect allergy
sufferers against environmental pollution, for example, it may be
useful to install a filter box with finer Filters. These Filters are
designed to offer the longest service life and lowest pressure loss
and are installed in a box immediately after the supply air outlet.
Class F7 Panel Filters are available as the filter elements.
The Filters fitted in the Air Filter Box should be checked for cleaning/
