Corrigo ventilation 3.4 manu

Manual Corrigo Ventilation, revision R Chapter 5 Functional description 37
When two DX cooling steps are used with binary function, the cooling effect is divided into three
steps. The desired blocking level can be set individually for each of these steps.
When three DX cooling steps are used with binary function, the cooling effect is divided into seven
steps. However, the controller still only has three blocking level settings. Therefore, Blocking step 1
will apply to binary steps 1 and 2, Blocking step 2 to binary steps 3 and 4, and Blocking step 3 to
binary steps 5, 6 and 7.
Blocking of DX cooling at low supply air fan speed
When DX cooling is used in conjunction with pressure controlled or flow controlled fans it is
possible to block DX cooling if the supply air fan control signal falls below a preset values. For
sequential control, the blocking level is individually settable for each DX cooling step.
When two DX cooling steps are used with binary function, the cooling effect is divided into three
steps. The desired blocking level can be set individually for each of these steps.
When three DX cooling steps are used with binary function, the cooling effect is divided into seven
steps. However, the controller still only has three blocking level settings. Therefore, Blocking step 1
will apply to binary steps 1 and 2, Blocking step 2 to binary steps 3 and 4, and Blocking step 3 to
binary steps 5, 6 and 7.
Blocking of DX cooling on cooling pump alarm
Corrigo can be configured to block DX cooling on cooling pump alarm.
In- and outputs
Heating
Cooling
Heating/Cooling
Change-over
DO
DO
DO
Step controller, step 1 (optional)
DO
DO
DO
Step controller, step 2 (optional)
DO
DO
DO
Step controller, step 3 (optional)
DO
Step controller, step 4 (optional)
Override of reduced speed for DX cooling
Override to normal quantity of air for DX cooling when the unit runs on reduced quantity of air. The
fans can be set to normal operation when cooling is required at high outdoor temperatures (e.g.
>14°C, the same temperature limit as for blocking of DX cooling).
5.1.5 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”.