User`s manual

9
shut-down (5 minutes by default). The setting can only be made by a person authorized by supplier - a service
technician.
The ventilation run-down time is automatically reduced depending on outside temperature - the lower the outside
temperature, the shorter the run-down time.
Immediate start-up without run-down
This option is used for starting via an external phase signal from the kitchen (input D4) or a room hygrostat (input D11).
Mixi ng damper
The unit’s mixing damper is used to set the ratio between fresh ventilation and recirculation air. When the unit is turned
off or the antifreeze protection facility is activated, it is shut down completely. It is controlled automatically following set
modes 1 to 5. If the unit is continuously operated in recirculation mode 3, short-time ventilation starts at pre-set intervals
to exchange air (a periodic ventilation start-up function).
Heat recovery ex changer
For more information on heat recovery exchangers see the technical data sheet of each unit.
Automatic b ypa ss damper
The damper’s function is to bypass supply air outside the heat recovery exchanger.
Filtration
The unit has a G4 class textile filter fitted on the supply side as a standard. Optionally a F7 class filter can be installed.
Rough filters from expanded metal mesh are used for pre-filters.
2. Con trolli n g t he operat i on of DU PLEXVE NT R_ 3 unit s
An RM module and an outside temperature sensor are integral parts of your HVAC unit. The system these components
the system cannot be operated.
1. Control via a CP 08 RD controller - see the following document:
CP-08 RD CONTROLLER
User’s Manual
FOR DUPLEXVENT R_3 HVAC UNITS
(supplied with the controller)
2. Control via a higher-ranking system:
- for detailed documentation contact the manufacturer
3. External inputs:
- external signals (switches in the bathroom, kitchen, toilet)
- CO
2
sensors
- A stop contact - when it is closed, the unit disables ventilation and only recirculation (and
heating) are enabled
See the following document:
CONSTRUCTION READINESS
ELECTRICAL INSTALLATIONS FOR DUPLEXVENT RA3 HOT AIR UNITS (with a CP08 RD controller)
3. Pr o ble ms a nd tr o ubl esh oot ing
Problem Possible causes Troubleshooting
Clogged air filters Check filters and replace if necessary Reduced ventilation
capacity
Clogged suction lamellas or
dented air duct
Check air supply ducts and clean if necessary
Blocked condensate drain line Check the line, clean or replace if necessary
A siphon is not installed or it is
not big enough
The siphon must correspond with the picture in
Chapter G
Condensate builds up
inside the unit
The unit is not fitted horizontally
Adjust the position of the unit so that it is
horizontal or sloping (depending on the location
and type of the unit)
Insufficient heating Air locked heat exchanger Bleed