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
43
10| Controlling the supply temperature limits
SUPPLY TEMPERATURE LIMITS
SCT
Supply Control
Min
Max
Default
U.M.
Text value
STL
TemperatureLimit
TL1
Supply temp low limit
-15,0
90,0
16,0
°C
TL2
Supply temp high limit
-15,0
90,0
35,0
°C
TL3
Supply temp low limit
enable
1
2
YES
;NO;YES
TL4
Band
0,1
20,0
3,0
K
TL5
Supply temp high limit
enable
1
2
YES
;NO;YES
TL6
Band
0,1
20,0
3,0
K
Tab 31_ [Controlling the supply temperature limits - Supply temperature limits]
10.1| Supply temperature limits in cascade control
(See “7] - Cascade Control”)
for the way supply temperature is limited in the cascade control.
10.2| Supply temperature lower limit
This function protects the environment and the people therein from the infeed of air that is too cold.
The function is enabled with TL3 and requires setting the lower limit TL1 beyond which the supply temperature
must not drop.
Operation in cooling mode
When the supply temperature “SUP - Supply Temp” drops below the lower limit TL1 increased by band TL4, the
cooling device and any damper to feed in outside air (free-cooling) are limited in a manner proportional to amount
the supply temperature differs from the limit setpoint. Below the setpoint, the limitation is total.
Fig 35_ [Controlling the supply temperature li- Operation in cooling mode]
Operation in dehumidification mode
Limitation is ON/OFF as described in the figure
Fig 36_ [Controlling the supply temperature li- Operation in dehumidification mode]
