User manual

1592022700 User manual iCHILL 200CX Rel. 1.0 22/04/2009
Pg.52/114
Par. Ar08 = 2: the heater 1 regulation is executed through the condenser water outlet NTC probe of the circuit 1.
The heater 2 regulation is executed through the condenser water outlet NTC probe of the circuit 2.
ATTENTION
It is not possible to control the heaters of the circuit 1 with the NTC probe of the condenser water outlet of the circuit 2 and viceversa.
Par. Ar08 = 3
The regulation of both the heaters together of the circuit 1 and 2 is excecuted through the probes configured as condenser water outlet
of the circuit 1 and 2 and the NTC of the common outlet.
ATTENTION
When the outputs are configured as heaters circuit 1 and 2 they are both controlled by the NTC probe of the common condenser outlet.
32.5 GRAPH OF THE ANTI-FREEZE- INTEGRATION HEATING - BOILER HEATER RELAYS
32.6 BOILER FUNCTION
The electrical heaters can be used as anti-freeze, as heating mode or to integrate the heat pump mode.
The function is enabled when:
• One NTC probe configured as external air for dynamic setpoint / boiler function.
• Parameter Ar11≠0.
Integration control Ar11=1
When the air temperature value detected by the external air probe decreases under the Ar12 setpoint, the Ar14 delay starts counting. If
during the Ar14 counting the external air increases above the Ar12 + Ar13 (differential) the function is aborted and the Ar14 time is
reloaded.
When the time Ar14 is expired and the external air temperature is still under the Ar12 setpoint, if the water temperature detected by the
evaporator probe is lower than Ar15 in chiller mode or Ar17 in heat pump mode, the heaters are turned on. When the temperature rises
over Ar15 + Ar16(differential) in chiller mode or Ar17+Ar18 in heat pump the heaters are turned off.
If the temperature of the external air rises above the Ar12 (set) + Ar13(differential) the heaters are turned off and the Ar14 delay is
reloaded.
Attention
If boiler function is activated and external air temperature value lower than Ar12, when air temperature decreases under the Ar19
setpoint the compressors are turned off. They are restarted only if the external air temperature rises above Ar19+Ar20 (differential).
Heating control Ar11=2
If during the functioning the external air temperature value goes down under the Ar12 setpoint, the Ar14 delay time starts counting. If
during this delay the external temperature rises above the Ar12+Ar13 the process is aborted and the time Ar14 reloaded.
If after the Ar14 delay the external air temperature is still under the Ar12 setpoint and the regulation water temperature detected by the
evaporator probe is lower than Ar15 (chiller) or Ar17 (Heat Pump), the heaters are turned on while the compressor(s) and the
condensing fan(s) are turned off. The heating is made only by the heaters.
When the temperature rises above the Ar15+Ar16 (regulation band in chiller) or Ar15 + Ar17(regulation band in Heat Pump) the heaters
are turned off.
If during the functioning the external air temperature value rises above the Ar12 +Ar13, the heaters are turned off and the compressor
thermoregulation is restarted, the Ar14 delay is reloaded.
HEATERS of the BOILER (ANTI-FREEZE) DURING the DEFROST CYCLE
The Ar05 parameter defines the functioning of the heaters of the boiler during the defrost. If Ar05=0 the heaters are activated by the
thermoregulation; if Ar05=1 the heaters are turned on when the 4-way valve changes the status from heat pump to chiller and then they
are turned off after the dripping time at the end of the defrost.
ATTENTION
The heaters of the boiler are always off when:
• Active flow alarm
• Active overload alarm of the configured water pump
• Active overload alarm of one of the two water pumps configured and any of the water pumps available for the water flow control.
(In this case the heaters are activated only by the anti-freeze setpoint to protect the evaporator)