Titon auralite TP518, Product Manual

9

Summer Bypass

Summer Bypass is designed to operate during hot periods where fresh air can be 
vented straight into the property without being preheated by the extracted stale 
air.  Summer Bypass operation is automatically controlled.  The Summer Bypass 
mechanism diverts the stale air being extracted from the dwelling around the heat 
cell so that its heat energy is not transferred to the fresh air being supplied to the 
property.

Automatic Frost Protection

During very cold weather, Automatic Frost Protection will detect temperatures that 
could form ice inside the unit. It will reduce the supply ventilation rate to prevent 
ice build up within the heat cell.  Automatic Frost Protection reduces the flow rate of 
cold air, thus allowing the warmer stale air to raise the temperature within the heat 
cell to such a level that prevents the formation of ice.  As internal temperatures rise 
Automatic Frost Protection will increase the supply ventilation flow rate back to the 
commissioned settings.

Summer Mode

In properties where it is desirable to reduce the supply of warm fresh air during hot 
weather, but where full Summer Bypass may be inappropriate or not available, the 
optional Summer Mode operation is available.  Summer Mode operates by stopping 
the supply fan.  Summer Mode can be triggered either manually or automatically:
Manual - This is by means of a volt-free switch wired directly into the controller PCB
Automatic - This is by means of a dedicated wall mounted room thermostat.  In 
this configuration Summer Mode will only operate when the temperature within 
the room has exceeded the dedicated thermostat setting.  When Summer Mode is 
selected the supply fan will remain off even if the HRV is placed into Boost.
Summer Mode must not be installed in dwellings where open flue combustion 
appliances are used.  Summer Mode must not be installed on HRV 

Q Plus

 MB units.