Configuration Manual

Version Document
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001
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ccess V4.X Configuration manual
29 (56) 2018-07-11
Minimum time for support control and demand control
 20 min
Extract air fan running during support control
 No
 Yes
Operation settings: Data & Setings > Demand control > Support Control
Support control is normally used when room temperature control or extract air control
has been configured. When extract air control is configured a room sensor must be
installed. “Support control Heating” or “Support control Cooling” will run if Support
control is configured, the running mode is in Off-state (timer control OFF and not in
extended running) and if conditions call for support control (see below). Minimum run
time is settable 0 to 720 minutes (FS= 20 minutes).
Support control can also be configured when supply air temperature control is used, if
a room sensor is installed. The controller uses the configured min. (FS=15°C) and
max. (FS=30°C) limitation values as support control setpoints. However, in this case
the min. and max. limitation values cannot be changed. To change the values,
temporarily configure room control, change the min. and max. values and then change
back to supply air control.
Support control can also be configured to start only with the supply air fan. In this
mode, the extract air fan is not active. This requires a digital output to be configured,
which controls the recirculation damper to open completely so the supply air fan can
circulate the air to and from the room. The digital output is called “recirculation
damper”.
Support control heating
Demand for support control heating is when the room temperature is lower than the
start value which is settable 0 to 30°C. The fans will run at the preset speed, the
heater and the heat exchanger are controlled by the supply air temperature controller
with the configured max limitation for the supply air (FS=30°C) as setpoint and the
cooling is shut off (0%). Support control heating stops when the room temperature
rises to the stop value and the minimum run time has been exceeded or the running
mode changes to ”On”.
Support control cooling
Demand for support control cooling is when the room temperature is higher than the
start value which is settable 20 to 50°C. The fans will run at the preset speed, the
heater and the heat exchanger are shut down (0 %) and the cooling is controlled by
the supply air temperature controller with the configured minimum limitation (FS=15°C)
as setpoint. Support control cooling stops when the temperature falls below the stop
value and the minimum run time has been exceeded or the running mode changes to
”On”.
CO2 control
Activate: Configuration > Function Configuration > Function Activation
 Off
 Start/Stop function
 Mixing damper function
 Both start/stop and mixing