EH-105
COOLING:
EH-105
P-area
I-time
ReverseDel
30°C
80 s
3min
5 ... 100 °C
10 ... 500 s
0 ... 8min
During continuous control the supply air temperature is reduced from the
room temperature during cooling by an amount equal to room
compensation for each degree of temperature exceeding the set value. If
the room compensation ratio during cooling is smaller than the heating
room compensation ratio during heating, the controller uses heating
settings (p. 24).
When the room temperature rises 0.6°C above the cooling period set
value, I- control is activated. I-control can decrease the supply air
temperature at the most by the ”I-maxEffect” set value. I-control begins to
decrease when the room temperature drops below the cooling period room
tempe 0.3°C. I-control is no longer in effect when the room
temperature drops below the set value of the cooling period. The ”I-max
effect” setting is the P-amount when calculating the I-value.
PI-control controls the cooling unit so that the supply air temperature
remains at the temperature indicated by room control.
Continuous control:
Stepped control (cooling control by magnetic valves):
The supply air temperature is controlled by the PI control. Reverse delay
is not in use.
When the reverse delay is set at 0, cooling functions as in continuous
control. When the reverse delay time is given, control functions as follows:
When the supply air temperature exceeds the supply air temperature set
value and the set reverse delay time has passed, the PI-controller begins
increasing the actuator control. When the supply air temperature drops
below the set value, the supply air temperature's PI-controller begins
decreasing the actuator control after the reverse delay.
The set reverse delay is in effect if the supply air temperature drops below
or during the exit phase exceeds the set temperature value by at least
4°C. If the deviation is smaller, the reverse delay time is continued
steplessly from 100%…0% with a deviation of 0.2°C…4.0°C.
1 ... 8°C
10 ... 120 min
1 ... 8°C
5 ... 100°C
10 ... 500 s
3°C
60min
3°C
30°C
80 s
Room comp.R.
I-room C.
I-maxEffect
P-supp.air
I-supp.air
Tuning values
Actuator selection
Range:
Factory
setting:
Tuning
value:
Explanation:
Cooling can be controlled by stepless continuous control (0-10V, 2-10V or 10-0V) or
On/Off control. With On/Off control, the cooling output is controlled by the EHR, with
the steps controlling the magnetic valves.
Select control mode. The
character is at the selected control mode.
The running permit for the cooling unit can be obtained from the controller's strip
connectors 42, 43 or 51. (Taking into use 24VAC On/Off outputs see p. 41)
COOLING ACTUATOR SELECTION
Room controlled cooling, continuous control:
Supply controlled cooling:
40
Actuator
0-10V/time
s
2-10V/time
s
10-0V/time
s
90
90
90
Attention! The cooling period set value
means the sum of the room
temperature set value + the ”Heat/cool
Hys” set value.
