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
27
4.8| Cooling coil defrost control
COOLING COIL DEFROST CONTROL
COI
Coils
Min
Max
Default
U.M.
Text value
dEF
Defrost
dE1
Probe selection
1
8
REt
NO;SUP;REt;OUt;tH1;tH2;tC1;tC2
dE2
Setpoint
-15,0
90,0
5,0
°C
dE3
Hysteresis
0,1
20,0
2,0
K
Tab 21_ [Coils control - Cooling coil defrost control]
If enabled (dE1 other than 0), the control is performed according to the value read on the probe selected with dE1,
and comparing the reading to setpoint dE2 and hysteresis dE3
If the temperature is lower than the setpoint, a defrost output “DEF - Defrost” is activated. It is disabled when the
value is above the se hysteresis.
Fig 14 _ [Coils control - Digital output Defrost]
4.9| Heat/Cool request
Is possible to managed two output signaling heat and cool request.
HEAT/COOL REQUEST
Type of output
Output used
digital output
HRE
HeatRequest
CRE
CoolRequest
Tab 22_ [Coils control - Heat/Cool request]
“
HRE – HeatRequest
” is ON when the load demand from Heat Sequence 1 or 2 is greater than 0.
“
HCE – CoolRequest
” is ON when the load demand from Cool Sequence 1 is greater than 0.
