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2 Features and benefits
TCGB0070 rev.3 - 04/2012
47
2
Room thermostat units
There are available two types of room thermostat units:
•
ON/OFF room thermostat unit (accessory): When the room temperature setting is higher than the room actual tempe-
rature, it is provided a thermo-ON signal to the system. Once reached the room temperature setting, it will be provi-
ded a thermo-OFF signal to the system.
•
Intelligent room thermostat unit (accessory) with extension room thermostat (accessory) for the second circuit: Based
on Outside Temperature Compensation (OTC). Water outlet target temperature is automatically recalculated taking
into account the outdoor ambient temperature and the difference between the room setting temperature and the room
actual temperature.
Complementary heating
•
Electric heater: For the most low ambient temperature conditions, the electric heater will be enabled in order to provi-
de the necessary supplementary heating, but only when the unit is operating in space heating mode.
-
3 steps heater control: The desired heating supplied by heater is determined by the Load factor, which is calcula-
ted by a P+I function ranging from 0 to 100%. Actual heater output will be translated from percentage to a 3 step
output using hysteresis system.
Bi-valent point
Air to water
heat pump
-20
-20
Air to water
heat pump
Heat demand
Air to water heat pump capacity
Heater-SP3Heater-SP2
Heater-SP1
Outdoor ambient
temperature (ºC)
Capacity (kW)
Step
Power (kW)
RWM-(2.0/3.0)(H)
FSN3E
RWM-(4.0-6.0)(H)
FSN3E
RWM-(8.0/10.0)(H)
FSN3E
1
1.0
2.0
3.0
2
2.0
4.0
6.0
3
3.0
6.0
9.0
-
Electric heater for emergency mode (Optional function): In case of outdoor unit malfunction, the required heating
can be provided by the electric heater.
-
One step heater for 3 phases unbalance (Optional function): For 3 phases units, in order to prevent 3 phases
unbalance of the installation by electric heater steps, this option will be used to switch the 3 steps at the same
time.