20
User manual – Controller CP Touch
9
Other functions
9.1
Forgetful operator
After the ventilation period set has expired, the command on the D1-D4 input is
deactivated. This function limits the duration of the AHU running.
9.2
Bypass dampers
Dampers for bypassing the heat recovery exchanger. DUPLEX heat recovery units are
optionally fitted with a heat recovery exchanger bypass. The damper can be used e.g.
for pre-cooling buildings by air from the outside at night in the summer or cooling in
the transitional period. This saves costs of cooling.
The bypass damper is primarily controlled by setting the required temperature Tp
and cannot be controlled manually.
9.3
Circulation damper
The circulation damper (also known as the mixing damper) is used for mixing outside
air with extraction (circulation) air. The circulation damper can run in EKO mode
which helps save the energy supplied for heating or cooling by mixing fresh air with
circulation air.
Air flow rate too low
The air flow rate through the unit is
not high enough.
Contact a service technician.
Check the condition of filters.
“AI input“ failure
The unit has not accepted an
external alarm signal.
Contact a service technician.
The unit is not
operational
The unit has not been commissioned
by a certified technician.
Contact a service technician.
Table 7
