Carel µC2SE

45
ENGLISH
µC
2
SE - +030220426 - rel. 2.0 - 03.08.2009
- Number of evaporators
H03: This establishes the number of evaporators present when there are 2 or 4 compressors, obviously
with 2 circuits (including the expansion). With one evaporator (H03=0), the management of the
heaters and the antifreeze function is performed only on B2. Vice-versa, with 2 evaporators (H03=1)
antifreeze control will be performed using B2 and B6, while input B5 is used to control the water outlet
temperature.
- Number of compressors/circuits
H04: This establishes the number of compressors per circuit and the number of circuits. For further
details see Table 4.g.
- Evaporator pump/fan operating mode
H05: This establishes the operating mode for the evaporator water pump or the outlet fan (in air/air
units).
H05 = 0: pump disabled, (the fl ow switch alarm is ignored)
H05 = 1: always ON (the alarm is managed)
H05 = 2: ON when called by compressor (the alarm is managed)
H05 = 3: the pump will be started and stopped at regular intervals (independently from the compressors)
as per the Burst setting (see parameters c17 and c18).
H05= 4: follow hot keep or hot start in heating, always on in cooling
H05= 5: follow hot keep or hot start in heating, follow the compressors in cooling.
When the heating or cooling signal is received, fi rst the evaporator pump/outlet fan starts (always ON),
and then the compressor, after the set times (c07, c08). The pump will not be stopped until all the
compressors are Off.
- Cooling/heating digital input
H06: Establishes whether the cooling/heating selection from digital input is enabled. see parameters P08,
P09, P10, P11, P12 and P13). The open status places the unit in cooling operation, vice-versa, in heating.
D-IN Open = Cooling
D-IN Closed = Heating
- ON/OFF digital input
H07: Establishes whether the ON/OFF selection from digital input is enabled or disabled. If the selection
is enabled (H07= 1), the “open” status switches the unit Off, while in the “closed” status, the unit may be
OFF or ON, as controlled by the keypad.
This parameter is not valid for condensing units.
- µC
2
SE network confi guration
H08: Establishes the layout of the tLan network.
0= µC
2
SE only
1= µC
2
SE + valve
2= µC
2
SE + exp.
3 = µC2SE + exp.+ 2 valves
4 = µC2SE + exp.+ 1valve
- Enable keypad
H09: Used to disable the modifi cation of the DIRECT and USER parameters from the keypad. The
value of the parameters can always be displayed. The enable/disable cooling, heating and reset counter
functions are also available.
Values:
0: keypad disabled
1: keypad enabled (default)
- Serial address
H10: Establishes the address of the instrument for the serial connection, via an optional board, to a PC
for supervision and/or telemaintenance.
- Selection map outputs
H11: This parameter is used to arbitrarily associate some digital outputs to the devices on the unit.
H11= 0: standard (default); for units with one compressor per circuit (H04=0, 2).
H11= 1: For cooling only units with two compressors (H01=0, 2, 4, 7, 9 and H04=1, 3, 5)
H11= 2: The outputs of the expansion follow the same logic for the 2nd circuit. For H01= 1, 3, 5, 6, 8, 10
and H04= 1, 3, 5
H11= 3: The outputs of the expansion follow the same logic for the 2nd circuit. For H01= 1, 3, 5, 6, 8, 10
and H04= 1, 3, 5
H11= 4: For H01= 1, 3, 5, 6, 8, 10 and H04= 0, 1
H11= 5: For cooling only units with two compressors (H01= 0, 2, 4, 7, 9, and H04= 0)
H11= 6: 1 compressor per circuit, heat pump
H11= 7: 1 compressor per circuit, cooling only, solution 1
H11= 8: 1 compressor per circuit, cooling only, solution 2
H11= 9: 2 compressors per circuit, heat pump
H11= 10: 2 compressors per circuit, cooling only, solution 1
H11= 11: 2 compressors per circuit, cooling only, solution 2