Trane CCE-Compact Series, Установка, эксплуатация и обслуживание

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Air quality setpoints 1/5
CO2 Eco 1200 ppm
CO2 Comfort 800 ppm
Control signal 0.00%
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Supply max 5000m3/h
Return max 5000m3/h
Figure 95: Air quality
14.4.1 Sensor type, control procedures
One type of sensor and one control procedure come into use, depending on the execution of the
AHU.
CO2 sensor
This sensor measures the CO
2
concentration [ppm] in the return air; the higher the concentration, the
worse the air quality. As a guide for the setting of the CO
2
concentration, the following table can be
used.
Air quality CO
2
concentration
Outdoor air (good quality) ~ 400 ppm
Room with good air quality < 800 ppm
Room with medium air quality 800 … 1000 ppm
Room with moderate air quality 1000 … 1400 ppm
Room with low air quality > 1400 ppm
Table 20: Room air quality
Recirculation damper
For the control of the air quality by means of a recirculation damper, it is possible to determine
whether the air quality has priority (default setting: Yes). Depending on the requirements, the fresh
air mode is active for a prolonged period (see
chapter 14.2.6 for the method of operation).
Setpoint Description Default
Min fresh air Minimum opening position for the fresh air
damper 20%
Max fresh air Maximum opening position for the fresh air
damper 100%
Table 21: Fresh air for air quality control
Fan speed
In case of good air quality, the AHU is operated with the airflow rate, speed or duct pressure speci-
fied by the operating modes economy and comfort; this setting should be as low as possible. If the