CIAT XtraConnect 2 - 9 PUMP MANAGEMENT; One pump; Two pumps; One pump with fault management

EN - 35
Press OK to directly access and change the adjustment value.
Press OK to confirm the change and go back to the reading parameter, or press ESC to cancel the changes and go back to the reading
parameter.
Note: This readjustment will be used to correct the difference between the value measured by a pressure sensor and the value read on a
pressure gauge.
The resulting new slope will then be used for control.
For the sensors, the value displayed by the LP transmitters (P304, P334 and P364) during maximum compensation is related to the LP cut-out
threshold (P55) after the shift with transmitters 0 → 17.3 bar.
The maximum positive compensation becomes:
- P55 = –0.1 bar if P55 < 1, under standard control for P55 = 0.3 maximum positive compensation +0.2 bar.
- 1 bar if P55 ≥ 1.
9 PUMP MANAGEMENT
 One or two pumps without fault management (P24 = No) Unit without hydraulic module • Customer pump control.
► One pump
- Evaporator pump in cooling mode (POWERCIAT or HYDROCIAT
units)
- Condenser pump in heating mode (HYDROCIAT units)
► Two pumps
- Evaporator dual pump in cooling mode (POWERCIAT units).
- Evaporator pump and condenser pump in cooling or heating mode
(HYDROCIAT units)
● Pump 1:
- Pump 1 is necessarily in On/Off operation.
- It runs if it is turned on via the console and the automatic pump
operation control is closed.
- It cannot shut off until 1 minute after the last control stage turns
off.
● Pump 2:
→ P108 = Fct (on/off)
- It runs if it is turned on via the console and the automatic
pump control is closed.
- Unless a fault occurs on the pump, it cannot shut off until
1 minute after the last control stage turns off.
→ P108 = Fct (control).
If the pump control is connected to the unit control.
- The pump turns on 15 seconds before the first control stage.
- Unless a fault occurs on the pump, it cannot shut off until
1 minute after the last control stage turns off.
► One pump with fault management
→ P24 = Yes and P25 = 1 CIAT hydraulic module with one pump
(POWERCIAT LXH)
- Pump 1 is necessarily in On/Off operation.
- It runs if there are no pump faults, if it is turned on via the
console, and the automatic pump control is closed.
- It cannot shut off until 1 minute after the last control stage
turns off. However, it will be immediately shut off if a pump fault
occurs.
► Two pumps with fault management
→ P24 = Yes and P25 = 2, CIAT hydraulic module with two
pumps (POWERCIAT LXH)
● The runtime of each pump is managed.
- The pump that has run the shortest is turned on.
- Both pumps are in on/off operation if neither has a fault.
- The second available pump is turned on if a fault occurs on
either pump.
- The machine is turned off if a fault occurs on both pumps.
- Unless a pump fault occurs, the pump(s) will not shut off until
1 minute after the last control stage turns off.
● Unseizing and switching the pumps
If any of the pumps remains off (for a reason other than a fault)
for over 7 days, it must be turned on between 9.00 am and 9.00 pm
and be allowed to run for 2 minutes.
- If P25 = 2, the pump with the longest runtime is turned off after
being unseized.
- If the unit is turned off via the On/Off button or the automatic
operation control and a water flow fault occurs during unseizing,
both pumps are turned off.
10. EVAPORATOR WINTER AND FROST PROTECTION
 POWERCIAT LXH hydraulic module defrost heater (if P24 = Yes)
The heater's operation is dependent on the temperature measured by the hydraulic module's sensor.
- Turned on when the hydraulic module's temperature  the setpoint of parameter P221
- Turned off when the hydraulic module's temperature  the setpoints of parameter P221 + parameter P222
- The heater is turned on if a fault occurs on the hydraulic module's sensor.
Display:
 POWERCIAT LXH evaporator pipe heat trace cable (if P24 = Yes)
The heat trace cable's operation is dependent on the temperature measured by the outdoor temperature sensor.
- Turned on when the outdoor temperature  the setpoint of parameter P220.
- Turned off when the outdoor temperature  the setpoint of P220 +3°C.
- The evaporator pipe heat trace cable is turned on when a fault occurs on the outdoor temperature sensor or the evaporator water outlet
temperature sensor.
 Evaporator water freezing protection (heater)
The chilled water outlet temperature is checked against the freeze limit setpoint set in parameter P52. This value adjusts itself based on the
chilled water outlet temperature.
- For a chilled water outlet temperature > +5°C, set the frost limit to +2°C.
- For chilled water outlet temperature < +5°C, set the frost limit to +3°C below the evaporator water outlet temperature.
- The evaporator defrost heater is turned on if a fault occurs on the evaporator water outlet sensor.
Note: if the unit operates with two cooling control setpoints, the frost protection setpoint adjusts itself based on the lowest evaporator water
outlet temperature.
● Operation
- Turned on when the chilled water outlet temperature  the value of P52.
- Turned on if a fault occurs on the evaporator outlet sensor.
PRESSURE SENSOR ADJUSTMENT ↑
x xb↓
HYDRAULIC MODULE
ANTIFREEZE PROTECT.
[-1, +1] default value = 0
Resolution: 0.1