The CO content at which AH enhancement drives the AH unit to max output (1/1 output).
The CO content at which AH enhancement drives the AH unit to min output (1/2 output).
The AH unit post-running delay when switching from 1/1 output to ½ output or shutting
down the AH unit by the CO content. This prevents the AH unit from switching too soon
from one mode to the next when the CO content changes quickly.
The controller changes the AH unit output steplessly according to the CO2 content.
When the CO content has risen to the ”CO2/max” setting, AH output is at maximum.
When the CO content has dropped to the CO2/min setting, AH output is at a minimum.
The controller switches the AH unit to 1/1 output when the CO2 rises to the ”CO2/max”
setting. The controller switches the AH unit to ½ output when the CO2 content has been
200ppm below the ”CO2/max” value for the ”CO2 postRun”
time.
2
2
2
2
2
2
700 ... 2000ppm
500 ... 1800ppm
0 ... 99min
EH-105
AH CONTROLS
Settings
EH-105
CO2/max
CO2/min
CO2postRun
1000ppm
600ppm
15min
The controller can enhance air handling by changing the AH
output according to the CO2 content, room temperature,
exhaust temperature,room humidity or remote setting
potentiometer. The outdoor temperature may inhibit AH
output during cold weather.
CO
ppm
2
CO2/max
CO2/min
time
Post-running time
IV-min output
IV-max output
Example. AC freq. converter controlled AH unit control
according to the CO content.
2
+ 100 ppm
AH enhancement according to the CO content
2
AH start-up/shut down according to the CO2 content
AC freq. converter controlled AH units
Contactor controlled AH units
The AH unit can be automatically started up and shut down
according to the quality of the room air (CO content) if this
function has been taken into use. (see p. 29). When the CO
content rises 100 ppm above the ”CO2/min” setting, the
controller starts up the AH unit; a 2-speed AH unit starts up
at ½ output and an AC freq. converter controlled AH unit
starts up at minimum output. When the CO content has
been under the ”CO2/min” setting for the ”CO2 postRun”
amount of time the controller shuts down the AH unit.
2
2
2
Co content
2
AH-output
HeatBoost
Cool Boost
Humid./max
Humid./min
Outd.T/max
Outd.T/min
6.0°C
0.0°C
90%
-10°C
-15°C
60%
1.5 ... 9.9°C
1.5 ... 9.9°C
0...100%
-30 ... +30°C
-30 … +30°C
0 ... 100%
AH unit driven to maximum as the room temperature drops:
Enhancement function during the cooling period
When the
room temperature deviates from the set value by -1 °C, the AH enhancement
function can begin steplessly increasing the AC freq. converter controlled AH
unit output. A maximum output is reached when the room temperature
deviates from the set value by the ”HeatBoost” set value + 1°C. In contactor
controlled AH units the controller drives the AH unit to 1/1 output when the
room temperature deviates from the set value by the”HeatBoost” set value +
1°C and returns to ½ output when the room temperature rises to within 2 °C of
its set value. Ensuring adequate heating output (see p. 29)
AH unit driven to maximum as the room temperature rises: When the room
temperature deviates from the set value by +1 °C, the AH enhancement
function can begin steplessly increasing the AC freq. converter controlled AH
unit output. A maximum output is reached when the room temperature
deviates from the set value by the ”CoolBoost” set value + 1°C. In contactor
controlled AH units the controller drives the AH unit to 1/1 output when the
room temperature deviates from the set value by the”Cool Boost” set value +
1°C and returns to ½ output when the room temperature drops to within 2°C of
its set value. (see p. 29)
When the outdoor temperature rises to the room temperature - 2°C, the
cooling enhancement function is deleted after which the cooling enhancement
can be activated again at the earliest after 15 min.
The heating period function is not in use at a 0 setting.
The cooling period function is not in use at a 0 setting.
AH enhancement according to room temp.
Enhancement function during the heating period
AH enhancement according to room humidity
or remote setting potentiometer
AH output limiting accord. to outdoor temp.
Range:
Factory setting:
Setting:
31
C
AHU at maximum
CO2/max
ppm
HeatBoost
Cool Boost
Humid./max
%
Outd.T/max
°C
1000
6.0
0.0
90
+10
C
AHU at minimum
CO2/min
ppm
CO2postRun
min
Humid./min
%
Outd.T/min
°C
600
15
60
-15
AH unit output control according to the room humidity or remote setting
potentiometer (only with AC freq. converter controlled AH units): When the
”Humidity/min”
setting has been exceeded, the controller begins steplessly increasing the AH unit
output and reaches maximum output when the room air humidity has reached the
”Humidity/max” setting.
The AH unit output is limited steplessly from maximum to minimum according to the
outdoor temperature. The AH unit output is not limited when the temperature
reaches the ”Outd.T/max” setting.
The AH unit output is limited steplessly from maximum to minimum according to the
outdoor temperature. The AH unit output is limited to minimum output when the
outdoor temperature drops to the AH minimum output ”Outd T” set value set here.
The outdoor temperature at which the AH unit is run at maximum output:
The outdoor temperature at which the AH unit is limited to minimum output:
