Corrigo ventilation 3.4 manu

Manual Corrigo Ventilation, revision R Chapter 5 Functional description 35
CO
2
If demand controlled ventilation (see 5.4.2) is activated in combination with mixing dampers, and
the CO
2
-value rises above the setpoint value, the dampers will let in more outdoor air. The function
is controlled by a PI-controller. Factory settings: P-band 100ppm and I-time 100 seconds. These
values can only be changed in E tool
©
.
CO
2
/VOC control can be used on ”Y2 exchanger” or ”Y4 extra sequence”. The control is selectable
for use on Y2, Y4 or on both outputs.
Minimum limit
An outdoor air minimum limit for can be set using the front panel. The limit value is settable
between 0 and 100 %.
In- and outputs
Plate
Rotating
Exch.
Liquid
Dampers
AI
AI
AI
AI
Outdoor temp. sensor (optional, outd. temp start)
DO
DO
DO
DO
Activate exchanger (optional, outd. temp start)
AI
AI
Deicing sensor (optional)
DI
DI
Deicing signal (optional)
DI
Rotation sentinel (optional)
Start delay exchanger
This function delays the exchanger start at start-up of the unit.
100 % exchanger output at start-up
After the delay described above, the exchanger output will be 100 % during the set time.
5.1.4 Types of chillers
Step controller Heating / DX cooling
As alternative or complement to the above mentioned analogue control, heating and cooling can be
activated in steps. The internal signal is then used to activate digital outputs for control of the
heaters/chillers. Up to four heater outputs and three cooler outputs can be configured. There are two
possible modes:
Sequential
Each output step has individually settable on and off values in percent of the control signal. The
number of steps is equal to the number of heater/chiller groups. Minimum on and off times can be
set, i.e. the minimum time the step has to be inactive or active for a change to occur.
Binary
The heater power outputs should be binary weighted (1:2:4:8 for heating, 1:2:4 for cooling). The
number of loads to be controlled is set. Thereafter the program will automatically calculate the
individual activation levels. Switching differential and minimum on/off times can be set. The
number of heating steps will be: 2
no. of groups
-1. In binary mode, the analogue output signal may be
used to fill out between the steps. The signal will go 0…100 % between the activation of each step.
The load connected to the analogue signal should have the same size as the smallest of the binary
groups. In the example below there are 4 heater groups (1:1:2:4) and the total number of heating
steps is eight.