Programmable Timers
The aurastat® VT has two 7 day programmable timers that control Setback
SPEED1 & Boost SPEED3. Both timers control 3 on/o periods per day.
The unit by default runs at Continuous SPEED2. The Programmable Timers are
used to Setback or Boost the ventilation rate at specic times.
The Timers have 4 modes,
OFF Timer inactive.
ONCE Timer active from rst ON time to last OFF time.
AUTO All three time periods are active.
CONTINUOUS Timer is active regardless of any timed settings.
and 2 override settings.
ADVANCE Steps the Timer to the next ON or OFF period.
PLUS ONE Adds 1 hour to a currentley active timer, or turns on a one
hour timer.
When a timer is active an icon appears in the status area and a red LED is
illuminated. If both timers have been set to be active simultaneously Boost
SPEED3 takes priority. All other speed controls eg a Boost switch, RH Boost,
SUMMERboost® or Frost Protection take priority over the programmable timers.
Filter Change Alert
The aurastat® VT will display an alert
after a specied time when the HRV
lters require changing.
4 x Fan Speeds
The units have 4 programmable
speed settings, all speeds are
variable between 14-100% and allow
independent speed setting of both
supply and extract ventilation rates
1. Setback Speed.
Reduced ventilation.
2. Continuous Speed.
Normal ventilation.
3. Boost Speed.
Increased ventilation
4. SUMMERboost® Speed.
Very high ventilation, only
available during Summer
By Pass operation.
Fan Speed Display
The aurastat® VT screen displays
the selected fan speed using the 1-4
stepped icons.
Boost Alert
A programmable timer which displays
a warning message on the aurastat®
VT LCD screen after the HRV has been
left in Boost Speed for the specied
time.
Summer Mode
Summer Mode operates by slowing or
stopping the supply fan. This reduces
the supply of From Atmosphere air
to the dwelling. Summer Mode is
triggered automatically or via a Volt
Free input. Summer Mode must not be
enabled or installed in dwellings where
open ue combustion appliances are
used.
Duct Heater Control
To maintain ventilation ow rates
where prolonged periods of very low
temperatures occur, the facility for the
control of an electrically powered Duct
Heater is provided, MAX 1000W. The
Duct Heater is placed in-line between
the outside supply vent and the From
Atmosphere terminal on the HRV. In
these applications, the heater is used
to pre-warm the outside fresh air
supply before it enters the HRV.
SUMMERboost®
SUMMERboost® allows both the supply
and extract fans to run at full speed
whenever the Summer Bypass is
activated. By default SUMMERboost®
is enabled. When SUMMERboost®
is triggered by Summer Bypass the
increased fan speed can be prevented
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. SUMMERboost® will only
operate when the temperature has
exceeded the thermostat setting.
Should the room temperature fall
below the thermostat setting, then
SUMMERboost® will not operate.
Summer By Pass
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
dwelling.
Continued....
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