Regin RCFD-230C User Manual

Control functions
2.2 Control principles
2.2.1 Heating and cooling functions
The thermostat uses a calculated setpoint for heating and cooling (SP
calc
). Since the user can increase or
decrease the basic setpoint, the calculated setpoint takes into consideration both the hysteresis and the user
defined setpoint adjustment (SP
adj
).
✓ Heating: SP
calc
= SP
basic
+ SP
adj
- (Hysteresis / 2)
✓ Cooling: SP
calc
= SP
basic
+ SP
adj
+ (Hysteresis / 2)
NNoottee!! The hysteresis depends on the current controller state. Therefore the calculated setpoint will
be different when in Occupied state compared to Standby state.
The heating function is activated when the room temperature is lower than SP
calc
minus a defined
temperature span (deltaT). The heating output closes when the calculated setpoint is reached.
See Figure 2-2.
Figure 2-2 Heating function
The cooling function is activated when the room temperature is higher than SP
calc
plus a defined
temperature span (deltaT). The cooling output closes when the calculated setpoint is reached. See Figure 2-
3.
Figure 2-3 Cooling function
Output,
heating
Temp.
On
Off
SP
deltaT
calc
Output,
cooling
Temp.
On
Off
deltaT
SP
calc
RCFD-230C manual, Rev. A 7

Regin RCFD-230C Specifications

General

Brand	Regin
Model	RCFD-230C
Category	Thermostat
Language	English