7.0 Using the fan
The fan is fully automatic and has no user adjustments.
The fan will run continuously at 6l/s flow rate and will boost to 15l/s
when activated by the integral active humidistat.
The fan automatically adjusts to slow changes in natural humidity
levels without operating the fan. If the humidity
levels increase at a rate slower than 5% RH in 5 minutes, the fan will
not be triggered by humidity. This is to prevent nuisance triggering of
the fan. If humidity levels increase quicker than 5% RH in 5 minutes
the fan will operate.
When relative humidity drops the fan continues to operate for a
fixed time delay.
7.1 Summer by-pass
Should the air temperature within the room exceed 25°C, the heat
exchanger will be switched off. The fan will continue to run to
provide extraction of stale air but fresh incoming air will not be
warmed by the heat exchanger.
When the temperature drops below 25°C the heat exchanger will be
switched back on and heat recovery will recommence.
The humidistat function remains active throughout the summer
by-pass period.
7.2 Winter setting
The fan is capable of operating down to -20°C without the need
for frost protection. The fan continues to operate to comply with
building regulations.
8.0 Maintenance
Cleaning
Before cleaning, isolate the fan completely from the mains supply.
Remove the front cover / baffle assembly by removing the two
screws on the underside of the cover and lifting off the cover by
unhinging from the top of the Wall Box.
To clean the cover, either wipe it with a damp, lint free cloth or wash
it in warm soapy water. Thoroughly dry the cover and re-fit.
Do not immerse the fan in water or other liquids to clean any other
parts of the fan.
Never use strong solvents to clean the fan.
The Air Supply and Extract filters should be checked regularly and
cleaned or replaced when necessary.
Filter life is dependent on environmental operating conditions. We
recommend filter replacement every 12 months. Should the filters
become excessively dirty beforehand they can be removed and
shaken clean. (see fig 6)
The fly screen filter is designed to prevent insects and large dust par-
ticles entering the heat exchanger. Due to the self cleaning nature of
the heat exchanger it should not be necessary to replace this filter.
The unique triple filtering and self cleaning heat exchanger means no
maintenance is required on the heat exchanger matrix.
Use only genuine RXG filters.
3
27. 04. 15 Leaflet Number 671677
Installation and Maintenance
NA-SRHR-100 Single Room Heat Recovery Fan
6.0 Dimensions
Figure 5. Dimensions.
AIR SUPPLY FILTER
EXTRACT FILTER
Figure 6. Filter locations.
