Termoregulation Time Proportional - Ferroli RHV R134a Instruction Manual

TERMOREGULATION TIME PROPORTIONAL

COOLING MODE (IR)
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 beyond the threshold given by CHILLER SETPOINT + (BAND / 2). The band is symmetric with
respect to the value of CHILLER SETPOINT.
When the temperature has exceeded the threshold value for the duration of the parameter CHILLER INC POWER TIME, acti-
vate a power step. If the temperature of evaporator water outlet by remains above the threshold value for further TEMPO
POWER INCREASE IN COLD, is another power step.
If the temperature of evaporator water outlet by remain within the temperature range determined by CHILLER SETPOINT +
(BAND / 2) and CHILLER SETPOINT - (BAND / 2) the power output from the machine remains constant.
If the temperature of evaporator water outlet by remains below the threshold CHILLER SETPOINT - (BAND / 2) for the time
given by the parameter CHILLER DEC POWER TIME is a step off power.
In this algorithm there is no hysteresis.
TEMPERATURE
WATER OUTLET
CHILLER setpoint
+(BAND / 2).
Set
Point
CB
CHILLER setpoint
- (BAND / 2).
TICP: Chiller INC power time
TDCP: Chiller DEC power time
CB: COOLING BAND
SET POINT: SET POINT TEMPERATURE IN COOLING
16
MONITORING SYSTEM - User setting
TIP F TDP F
TDCP
TICP
+1 -1
(TIME INCREASING COOLING POWER)
(TIME DECREASING COOLING POWER)
TDP F TDP F TDCP
TDCP
TEMPERATURE READ BY
EVAPORATOR
WATER OUTLET PROBE
-1 -1
TICP
TIP F
TIME
+1 +1