Carel uC2SE, User Manual

Page: 45 / 76

45
ENGLISH
μC 2 SE - +030220426 - rel. 2.1 - 09.06.2010
- 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