F61 - Flow switch validation time:
Operating in rotation, pressurization, or depressurization mode, the flow switch contact is expected to be
closed as soon as an output is activated (OUT1 or OUT2).
Operating in pressurization or depressurization mode:
If the flow switch is not triggered during the
time set in this function, the number of attempts to alert about a lack of flow is increased.
Operating in rotation mode:
If the flow switch is not triggered during the time set in this function, the
currently active pump is turned off, the number of attempts to alert about a lack of flow is increased and the
running attempt goes to the other pump.
If the flow switch is not enabled in the “
[f59]
-
” function, this validation
Operating mode of digital input 2
will not be run.
This function can be disabled by adjusting it to the minimum value 0
[no,,]
.
F62 - Number of attempts to alert about lack of flow:
If the number of attempts to alert about a lack of flow set in this function is reached, the outputs are turned
off and a message on the lack of water flow
[Flo,]
. In this case, the outputs remain off and the system
can only be re-established by resetting the rotation (by digital input or pressing the
>
key (see item
6.3.8)).
The number of attempts for each output is reset when the flow switch is closed.
F63 - Cooling fluid:
Allows to define the cooling fluid that will be used in the calculations for superheating, subcooling, floating
condensation, and floating evaporation.
[,,,1]
- R22
[,,,2]
- R32
[,,,3]
- R134A
[,,,4]
- R290
[,,,5]
- R404A
[,,,6]
- R410A
[,,,7]
- R507
[,,,8]
- R600A
[,,,9]
- R717
[,,10]
- R744
F64 - Superheating calculation:
The superheating control indicates how much gas is above the saturation temperature (boiling point) at a
certain pressure.
A pressure transducer in the suction line and a temperature sensor at the evaporator outlet or in the
compressor input (total) is required.
Superheating = suction temperature - saturated vapor temperature (flow curve).
[,,,0]
- Disable
[,,,1]
- Performs the calculation through the P1 pressure transducer and T1 temperature sensor
[,,,2]
- Performs the calculation through the P2 pressure transducer and T2 temperature sensor
[,,,3]
- Performs the calculation through the P1 pressure transducer and T1 temperature sensor and
turns the OUT1 output off in the event of low superheating or high superheating alarms
[,,,4]
- Performs the calculation through the P2 pressure transducer and T2 temperature sensor and
turns the OUT2 output off in the event of low superheating or high superheating alarms
Note:
When a stage is set as an alarm, rotation, control of semi-artesian wells and water tanks or filter
control, the corresponding output will not be turned off in the event of a low superheating or high
superheating alarm.
F65 - Low superheating alarm:
Temperature limit for indicating a low superheating
[ASPL]
.
A low superheating indicates a high dosage of cooling fluid in the evaporator, which may damage the
compressor through the intake of liquid.
F66 - High superheating alarm:
Temperature limit for indicating a high superheating alarm [
ASPh]
.
A high superheating indicates a low dosage of cooling fluid in the evaporator, which may cause high
temperatures in the compressor through the intake of superheated gas, in addition to reduced evaporator
capacity and reduced compressor operating life.
F67 - Subcooling calculation:
The subcooling control indicates how much cooling fluid is colder than the condensing temperature
needed to prevent loss of performance by evaporating the cooling fluid prior to the expansion valve.
A pressure transducer in the liquid line and a temperature sensor at the condenser outlet is required.
Subcooling = saturated liquid temperature - temperature in the liquid line.
[,,,0]
- Disable
[,,,1]
- Performs the calculation through the P1 pressure transducer and T1 temperature sensor
[,,,2]
- Performs the calculation through the P2 pressure transducer and T2 temperature sensor
F68 - Low subcooling alarm:
Temperature threshold for indicating a low subcooling alarm
[ASbL]
.
A low subcooling indicates a low heat exchange in the evaporator and a risk of flash gas prior to the
expansion valve.
F69 - High subcooling alarm:
Temperature threshold for indicating a high subcooling alarm
[Asbh]
.
A subcooling may indicate high pressures in the system.
F70 - Floating condensation control (Dynamic Setpoint):
The floating condensation control is intended to dynamically adjust the setpoint according to the
temperature in the external environment, reducing energy consumption and increasing the performance
coefficient of the system. The setpoint
[Sp1,]
is reduced in proportion to a reduction in the external
temperature. Every 1°C/°F at which the outside temperature is reduced, 1°C/°F in the setpoint is reduced
or the equivalent in PSI/BAR according to the curve of the fluid saturation pressure.
[,,,1]
- Control over floating condensation
using the P1 pressure transducer to measure
pressure
discharge pressure and uses the T1 temperature sensor to measure external temperature and
reduce
the 1st stage pressure (
) setpoint
[Sp1,]
.
depressurization
[,,,2]
- Control over floating condensation
using the T1 temperature sensor to measure
temperature
the temperature in the output of the condenser and uses the T2 temperature sensor to measure external
temperature and
the 1st stage () temperature setpoint
[Sp1,]
.
reduce
Note:
For Floating Condensation Control to work, it is necessary to set the “
[f04]
- 1st Stage Operation
Mode (OUT1)" function as Floating Condensation Control. In case of low subcooling alarm
[ASbL]
, the
setpoint will return to its original value.
F71 - Floating condensation - Float start temperature
Temperature measured in the external sensor, below which the control of floating condensation begins to
reduce the setpoint.
If the floating condensation is controlled through pressure, the minimum setpoint is limited by the value
defined in the “
-
Minimum setpoint of pressure permitted to the end user OUT1
” function.
[f07]
If the floating condensation is controlled through temperature, the minimum setpoint is limited by the
value defined in the “
-
Minimum setpoint of temperature permitted to the end user OUT1
” function.
[f16]
Note:
The control of floating condensation pressure, this pressure is converted to temperature through
the saturation of fluid curve.
F72 - Adiabatic condensation - Minimum external temperature (safe level):
Minimum threshold of temperature in the T1 sensor for evaporative condensation control to function.
When T1 is below this value, the OUT2 output will not be activated (it remains off).
F73 - Adiabatic condensation - Difference (T1-T2) for starting the pump:
Allows the temperature difference between the external environment sensor (T1) and the sensor after the
water curtain (T2) to release the passage of water (water pump or valve). When the temperature
difference (T1-T2) is less than or equal to the value set in this function, the passage of water to the curtain
is released. Water is sprayed by the pump (or valve) controlled by the OUT2 output reducing the dry-bulb
temperature of the air passing through the water curtain providing low condensation temperatures in hot
and dry climates, increasing the efficiency of the system.
F74 - Adiabatic condensation - Difference (T1-T2) for shutting down the pump:
Allows the temperature difference between the external environment sensor (T1) and the sensor after the
water curtain (T2) to shut the passage of water (water pump or valve). When the temperature difference
(T1-T2) is higher than or equal to the value set in this function, the passage of water to the curtain is
blocked.
Note:
[f37]
In order for the adiabatic condensation control to operate, the “
- 2nd Stage Operating Mode
(OUT2)” is set as the adiabatic condensation control (differential thermostat) and the T1 and T2
temperature sensors are enabled on the digital inputs.
F75 - Floating evaporation (Dynamic Setpoint) - Float start temperature:
Temperature measured in the external sensor, below which the control of floating evaporation begins to
increase the setpoint.
The maximum setpoint is limited by the value set in the “
-
Maximum setpoint of pressure permitted
[f41]
to the end user OUT2
” function.
The floating evaporation control is intended to dynamically adjust the setpoint according to the
temperature in the external environment, reducing energy consumption and increasing the performance
coefficient of the system. The setpoint
[Sp2,]
is
in proportion to a reduction in the external
elevated
temperature. Every 1°C/°F at which the outside temperature is reduced, the 1°C/°F equivalent is
elevated
in PSI/BAR in the setpoint according to the curve of the fluid saturation pressure.
Using the P2 pressure transducer to measure suction pressure and using the T2 temperature sensor to
measure external temperature and increase the setpoint pressure (depressurization) of the 2nd stage
[Sp2,]
.
Note:
[f37]
In order for the floating condensation control to operate, the “
- 2nd Stage Operating Mode
(OUT2)” function needs to be set as the pressure (depressurization) floating evaporation control and the
temperature sensors are enabled on the digital inputs. In the event of a high temperature alarm (
[At1h]
), the setpoint will return to its original value.
F76 - Activation mode for the P1 pressure alarms:
F77 - Activation mode for the P2 pressure alarms:
F78 - Activation mode for the T1 temperature alarms:
F79 -
:
Activation mode for the T2 temperature alarms
It enables you to operate the control outputs, turning them off in the event of a pressure (high / low) or
temperature (high / low) alarm:
Note:
The OUT2
[F37]
.
output will not be switched off, in case it is set as as alarm in
[,,,0]
- Don't activate the outputs
[,,,1]
- Only activate output OUT1
[,,,2]
- Only activate output OUT2
[,,,3]
- Activate both outputs
F80 -
:
Number of times the temperature and pressure alarms wil be automatically reset
Number of times they can be automatically reset within 1 hour.
Whenever possible, the controller will try to correct the problem that set off an alarm. The reset
system allows the user to configure how many times the controller will attempt to correct the issue
automatically (automatic reset) before giving up and turning off the output as programmed through the
functions
[F76]
to
[F79]
.
When the number of automatic resets allowed within 1 hour is exceeded, the system displays the
message
Interlock alarm, which requires the system to be reset manually.
[AInt]
-
To do this, access the quick menu via the key
according to chapter 6. Select
and use a short
;
,
[rEAr]
press of the
/
key to confirm
F81 - Delay time until control is returned after a pressure / temperature alarm goes off:
This is the length of time the controller will keep the output switched off (as programmed using functions
[F76]
to
[F79]
) after the automatic correction of a pressure / temperature alarm).
F82 -Function lock mode:
This allows and configures the function lock (see item 6.3.2).
[,,,0]
- Does not allow the function lock
[,,,1]
- It allows a partial lock where the control functions will be locked but the adjustment of the
setpoint and hysteresis, date views, and maximum and minimum record views are allowed
[,,,2]
- It allows the full lock, enabling only the date views and maximum and minimum record views
F83 - Time for functions lock:
Allows control functions lock (see item 6.3.2).
[,,15]
-
[,,60]
- Defines the time in seconds for the controller to activate.
F84 - Control functions shutdown:
Allows the turning off of the control functions (see item 6.3.3).
[,,,0]
- Disables the control functions shutdown
[,,,1]
- Enables to activate/deactivate the control functions only if the functions are unlocked
[,,,2]
- Enables to activate/deactivate the control functions even if the functions are locked
F85 -Address of the instrument in the RS-485 network:
Instrument's network address for communicating with Sitrad software.
Note:
There can be no more than one instrument with the same address on a network.
