Ferroli RHV R134a Instruction Manual page 17

HEATING MODE (IP / IW)
The function of the regulator consists in activating a number of resources (power step) in proportion to the time that the evapo-
rator water outlet by spends below the threshold given by HEAT PUMP SETPOINT - (BAND / 2). The band is symmetric with
respect to the value of HEAT PUMP SETPOINT.
When the temperature remains below the threshold value for the duration of the parameter HEAT PUMP INC POWER TIME,
activate a power step. If the temperature of evaporator water outlet by remains below the threshold value for further HEAT PUMP
INC POWER TIME, is another power step.
If the temperature of evaporator water outlet by remain within the temperature range determined by HEAT PUMP SETPOINT +
(BAND / 2) and HEAT PUMP SETPOINT - (BAND / 2) the power output from the machine remains constant.
If the temperature of evaporator water outlet by remains above the threshold HEAT PUMP SETPOINT + (BAND / 2) for the time
given by the parameter HEAT PUMP DEC POWER TIME is a step off power.
In this algorithm there is no hysteresis.
TEMPERATURE
WATER OUTLET
HEATPUMP setpoint
+ (BAND / 2).
Set
Point
HB
HEATPUMP setpoint
- (BAND / 2).
TIHP: Chiller INC power time
TDHP: Chiller DEC power time
HB: HEATING BAND
SET POINT: SET POINT TEMPERATURE IN HEATING
MONITORING SYSTEM - User setting
TDHP TIHP
-1 +1
(TIME INCREASING HEATING POWER)
(TIME DECREASING HEATING POWER)
TIHP TIHP
TEMPERATURE READ BY
CONDENSER
WATER OUTLET PROBE
+1 +1
TDHP
TIME
-1 -1
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