Defensor Mk5 Technical Documentation

14
– System 3: Supply air humidity control
Supply air humidity control (humidity sensor installed in supply air duct) should be used only
where room humidity control is impracticable for technical reasons. Such systems always
require a PI-controller. The humidity sensor (A1) is located in the supply air duct after the steam
distribution pipe.
A1 humidity sensor
B1 B2 Mk5 B3
B1 ventilation interlock
B2
B3
airflow monitor
safety humidistat
PII
PII PIE Y
internal continuous controller (PI-controller)
external continuous controller (e.g. PI-controller)
input signal from A1
PIE
Which humidity control system for which application?
Defensor
Application Location of the humidity sensor
Room or exhaust air duct supply air duct
Air conditioning systems with:
supply air portion up to 33% System 1 System 1
supply air portion up to 66% System 1 or 2 System 2 or 3
supply air portion up to 100% System 2 System 3
Supply air humidity control ––– System 3
Direct room humidification System 1 –––
Please contact your Defensor supplier, if your application meets the following conditions:
– Humidification of small rooms up to 200 m3 – Air conditioning systems with a high number of air exchanges
– Systems with variable air volume flow
– Test facilities with extreme control accuracy requirements
– Rooms with a high variation in max. steam capacity
– Systems with temperature fluctuations
– Cold rooms and systems with dehumidification
K
∆p
ϕ
max
ϕ
A1
Y