Operating manual
Document nr. : 010346
Version :
V1.4
MC 785-DF KLIMA ALFANET
Client : General
Page :
5 of 20
2.
Functional specifications.
The
MC785-DF KLIMA
has the following control functions:
• cooling
• heating
• dehumidfying
• humidifying
Further more the controller has an alarm relay, which is activeted when the alarm levels are exceeded or a
sensor is broken.
Four addition temperature sensors can be connected to the Controller thru the LMS 4x Pt100 Module.
These sensors can assigned as control-, defrost- or productsensor.
• In case that extra sensors are assigned as control sensor to the controller, it regulates the temperature
with the average temperature of these sensors.
• In case that extra sensor are assigned as defrost sensor to the controller, it uses the lowest
temperature of these defrost sensors to defrost the controller.
• In case that extra sensors are assigned as product sensor to the controller, it uses them only for
readout.
A selection between four different modes of defrosts can be made:
• no defrost,
• natural defrost
• electric defrost
• hotgas defrost
The controller has five analog outputs available with a range of 0/+10Vdc (CH-1 to CH-5).
Whereby CH-1 is connected direct to the controller and CH-2 untill CH-5 is connected at the LMS analog out
module (out-1 untill out-4). From which four outputs (CH-1 to CH-4) are programmable as:
• measuring signal
• setpoint signal
• P(I) control for cooling
• P(I) control for heating
• P(I) control for humifying
• P(I) control for dehumifying
And one output CH-5 has the function of the highest output percentage of CH-1 (Out-1 at the MC785-DF
KLIMA) and CH-2 (Out-1 at the LMS Anaolg-out module).
The controller has a digital input contact which is used as day/night input.
The selection of the above-mentioned settings is done thru the Internal Parameters.
The controller can also be connected to the ALFANET, thru the RS485-network connection, to view or set the
controller.