LAB1283R, Issue 2, Apr 2017
Page 8
1.2 Physical specification
1.3 Main features
1.3.1 Thermal bypass
1.3.1.1 The HRX2D model is fitted with a fully automatic heat exchanger bypass mechanism.
Time clock control and manual override are also available
1.3.1.2 In automatic mode, the bypass will open when the indoor target temperature reaches a
pre-set value. Using the interface, the trigger temperature can be set b15°C and
25°C
1.3.1.3 The interface contains an optional frost protection system. During periods of very cold
weather, the fresh air supply fan will automatically reduce in speed to approximately 20%
of its commissioned setting to reduce the load on your heating system and avoid
possible freezing of the heat exchanger. During these periods, the extract fan will
increase in speed to its commissioned boost speed to maintain an even air pressure.
Using the interface, the trigger temperature can be set between -15°C and +5°C
Ø150mm
935mm
530mm
600mm
683mm
LAB1283R, Issue 2, Apr 2017
Page 25
5.15 Default interface factory settings
P1
t3 - 20°C
t4 - 10°C
Humidity – 60%
Filter – 3000 hours
Fan 1 – Low 20%
Fan 1 – Boost 50%
Fan 1 – Max 80%
Fan 2 – Low 20%
Fan 2 – Boost 50%
Fan 2 – Max 80%
Bypass temp – off
T5
Delay-on – off
Delay-off – off
Hum - on
V E N T I L A T I O N
V E N T I L A T I O N
