Dantherm 4000 Series Servis Kılavuzu - Sayfa 5

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Sayfayı Yazdır
Overall description, continued
The illustration and table below show the airflow of the Air conditioner. The two air flows
Functionallity
(internal/external) operate separately. External air is only used to cool down the condenser
which dissipates the heat absorbed by the indoor evaporator. The air flows are not mixed.
External
Internal air flow
Warm, internal air is drawn into the unit by the internal evaporator fan, through the
evaporator, and then released into the enclosure, through the evaporator opening.
External air flow
Cold, external air is drawn into the unit by the condenser fan, and routed through the
condenser, where it is cooling down the condenser. The air is returned to the external
environment after it passes through the condenser.
Filters
The external air inlet in the bottom of the unit, has an optional pre-filter. This will reduce the
instrusion of leaves or bugs in the air inlet.
The slide track in the bottom of the unit allows the user to slide in the pre-filter.
Accessory
8
Internal
Fig. 4
Embedded
Fig. 5

Electronic control description

This section describes key features of the electronic control and how it operates.
Introduction
Never perform installation, maintenance or service, without disconnecting the AC power
Warning
supply.
Embedded
Basic parameters of the built- in controller can be set via the on board control panel from
Controller
inside the unit. See more in operation section page 12.
Extended parameter settings, as well as logging of operation data, is possible through the SD
card interface.
Control strategy
The controller controls the fans, heater, and cooling compressor according to the temperature
in return air flow.
•
At power up, the controller will initiate a self test procedure for a few seconds.
•
During operation, the evaporator fan will repeatedly circulate the indoor air.
•
The compressor will start when the temperature is higher than the setpoint, which then
initiates cooling.
•
Then compressor stops at setpoint.
•
The high temperature alarm will initiate an alarm on the alarm output when the temp is
higher than 60° C.
•
The low temperature alarm will initiate an alarm on the alarm output when the temp is
lower than 1° C.
•
The condenser fan operates only when the actual temperature on the condenser surface
requires this.
Alarm connection options can be found on page 11.
This illustrates the operation panel, seen from inside of the unit.
Operation panel

Keypad Display
In/outputs
RS 485 TTL (PC)
Fig. 6
9