Technical data

171
Electronic
controllers
Electronic fan coil controllers - quick reference table
Thermostats HDB NTC
Control algorithms
On-o x x
Proportional-integral x
Valve management
Air flow control only (no valve) x x
On-o actuators x x x
Proportional valves o
Fan control
Three speeds x x x
Optimum fan speed selection x x x
Variable speed o
Main functions
Setpoint control x x x
Occupied/unoccupied mode x x x
Frost protection mode x x x
Window contact input x x x
Measurement of water inlet temperature for automatic seasonal changeover (2 pipes) Type A x x
Automatic seasonal changeover (4 pipes and 2 pipes + electric heater) Type B x x
Manual changeover x x x
Frost protection mode x x x
Continuous ventilation within dead-band x x x
Periodical ventilation within dead-band x x x
Unit grouping x x
Louvre control x x
On-site configuration x x
Supply air temperature monitoring limiting x
Communication (CCN) x
Electrical heater loadshed x
Dirty filter alarm x
Alarm reporting x
IAQ control o
Demand control ventilation (DCV) o
Free cooling mode o
User interface
Digital display x x
Automatic or manual fan speed control x x x
Operating mode selection x x x
Occupancy (eco) button x x x