Danfoss MCX08M User Manual

Danfoss Electronics spa
Air Handling seq.- user manual
DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2
Produced by Danfoss Electronics spa Graphic Department, 10-2009
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6| Temperature control sequences
To control temperature are managed some control sequences. One is dedicated to dampers; the others are 2 for
heating and one for cooling process and must be assigned to the desired coil.
6.1| Damper control sequences
There is one control sequences dedicated to dampers which is able to manage the external damper, mixing damper
and energy recovery.
The mixing damper and the energy recovery are antagonistic to the external damper.
Hereafter we refer mainly to the external damper.
The control sequence is congured using the following parameters:
DAMPER CONTROL SEQUENCES
TCT Temp Control Min Max Default U.M. Text value
DAP Damper Sequence
D01 Control probe 1 8 4 NO;SUP;REt;OUt;tH1;tH2;tC1;tC2
D02 Freecool setpoint selection 1 4 1 MAIN;CASC;LS1;LS2;FRH
D03 Freeheat setpoint selection 1 4 1 MAIN;CASC;LS1;LS2
D04 Freecool oset -20,0 20,0 0,0 K
D05 Freeheat oset -20,0 20,0 0,0 K
D06 Proportional band 0,1 20,0 10,0 K
D07 Changeover probe 1 1 9 OUT NO;SUP;REt;OUt;tH1;tH2;tC1;t
C2;DI
D08 Changeover probe 2 2 9 REt NO;SUP;REt;OUt;tH1;tH2;tC1;tC
2;SET
D09 Oset changeover
(MECHSET)
0,1 20,0 1,0 K
D10 Minimum opening 0 100 15 %
Tab 25_ [Temperature control sequences - Damper control sequences]
You have to dene
D01: the control probe.
D02: the setpoint used for freecooling, when freecooling is possible (see “6.1.1] Freecooling/Freeheating selection”).
Possible values are:
MAIN: main setpoint ATS (STH for heating and STC for cooling,
eventually compensated), (see “6.4] Main setpoint”);
CASC: supply temperature setpoint coming from the cascade controller (see “7] Cascade Control”);
LS1: local setpoint LS1, (see “6.5] Local setpoint”);
LS2: local setpoint LS2, (see “6.5] Local setpoint”);
FRH: connected to the setpoint of the freeheating sequence (only for
freecooling sequence). (see “6.3] Connection of setpoint sequences”).
D03: the setpoint used for freeheating, when freeheating is possible (see “6.1.1 Freecooling/Freeheating selection”).
See above for possible values.
D04: oset of the freecool setpoint.
D05: oset of the freeheat setpoint.
D06: proportional band for the proportional control.
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Danfoss MCX08M Specifications

General

Brand	Danfoss
Model	MCX08M
Category	Controller
Language	English