dixell ichill IC260L, User Manual

Page: 64 / 105

1592015300 User manual iCHILL 200 L GB r1.3 09/09/2005
23.6 G
RAPH OF THE ANTI
-
FREEZE
-
INTEGRATION HEATING
-
BOILER HEATER RELAYS
23.7 B
OILER THERMOREGULATION
(
ANTIFREEZE
), B
OILER FUNCTION
To determine the electrical heater control in chiller or heat pump mode because the electrical heaters can be used as anti-freeze or can
also be used to integrate or heating the heat pump mode or in particular situation in chiller mode.
The function is enabled when:
1.
One NTC probe configured as external air for dynamic setpoint / boiler function.
2.
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 and 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.
With the heaters on if the temperature of the external air rises above the Ar12 (set) + Ar13(differential) immediately they are turned off
and the Ar14 delay is reloaded.
Attention With Boiler function activated and external air temperature value lower than Ar12 if the 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 HP) 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 parameters defines the functioning of the heaters of the boiler during the defrost, If Ar05=0 the heaters are activated by the
thermoregulation while 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)
24 ANTI - FREEZE ALARM AND HEATERS REGULATION THROUGH DIGITAL INPUT
The anti-freeze alarm and the heaters regulation of the 1
st
circuit is managed by the digital input configured as anti-freeze alarm circuit
#1.
The anti-freeze alarm and the heaters regulation of the 2
nd
circuit is managed by the digital input configured as anti-freeze alarm circuit
#2.
ATTENTION
The output of the 1
st
circuit can not be managed by the digital input of the 2
nd
circuit and viceversa.
The regulation outputs of th1 1
st
and 2
nd
circuit can be regulated together by a single digital input configured as anti-freeze circuit #1 or
circui #2. In this case, with active alarm of the common digital input, the display will show both the antifreeze alarm messages.
25 THERMOREGULATION AND COMPRESSORS ROTATION
The CO14 parameter determines the compressor on and off sequence.