DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2
Produced by Danfoss Electronics spa Graphic Department, 10-2009
4
Air Handling seq. - user manual
1| Introduction
The algorithm is aimed at controlling the main types of air treatment units.
It can run on the entire line of MCX systems and envisages the use of a remote MMI interface, Modbus
communication and EXC06 expansion.
It can handle the following main functions:
control of heating and cooling coils using PID logic and cascade control;
control of fans according to air pressure using PID logic;
humidity control;
air quality control;
“freecooling” and “freeheating”;
energy recovery;
limiting of supply temperature and humidity;
management of ON/OFF, 3-point, 0/10V valves;
management of ON/OFF and 0/10V dampers;
frost protection.
The type of AHU to be controlled is dened by conguring the parameters and dening the inputs and outputs
to be used to control the various elements that make up the AHU.
Both the parameters and the inputs and outputs can be congured from the instrument user interface or from
a PC using the Congurator software “AHU_Interface_vNN.xls” supplied with the algorithm (see "17] APPENDIX
– Use of the Congurator").*
* In the latter case, it is possible to
generate as many binary
application les as the number of
congurations desired and, after
loading them into the MMIMYK
accessory, select the
conguration to download onto
the MCX on a case-by-case basis.
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