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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4.6| Pumps control
Is possible to managed one pump for each coil through the following digital output:
PUMPS DIGITAL OUTPUT
Coil Type of output Output used
Coil1 digital output CP1 Coil1Pump
Coil2 digital output CP2 Coil2Pump
Coil3 digital output CP3 Coil3Pump
Tab 18_ [Coils control - Pumps digital output]
If present, the pumps are activated when request is sent to the corresponding coil. You can dene the load percentage
to switch on the pump, via PON parameter, and to switch it OFF, via POF parameter.
Example
*Pump switches ON at 5% and
OFF at 0%.
You can also dene a switch OFF delay POd for the pumps.
PUMPS CONTROL
PUM Pumps Min Max Default U.M. Text value
STU Setup
POd Pump delay at OFF 0 9999 5 SEC
PON Power request activation 0 9999 5,0 %
POF Power request deactivation 0 9999 0,0 %
PFr Outside temperature ON -50,0 10,0 -20,0 °C
Tab 19_ [Coils control - Pumps control]
4.6.1| Pumps winter start
All the congured pumps will be operated if the outside temperature goes below a xed limit PFr to prevent freezing.
The “ice” blinking icon signals this function.
Fig 12 _ [Coils control - Pumps winter start]
(See “9] Frost protection” for further actions to prevent frost.)

Danfoss MCX08M Specifications

General

Brand	Danfoss
Model	MCX08M
Category	Controller
Language	English