"
Complementary list of parameters for advanced
configuration
P20
Stage differential (in heating)
Factory setting : 2K
P21
Differential between stages (in heating)
Factory setting : 3K
P22
Stage differential (in cooling)
Factory setting : 2K
P23
Compressor validation
Value 0 : operation not authorised
Value 1 : operation authorised
The parameter P23 permits operating the unit with the auxiliary
devices only. It can help to ensure the heating while waiting for
repair on the refrigerant circuit (refrigerant leak, etc..).
If you have selected a regulation as a function of the outside
temperature (P02 and P03 = 1), the following parameters must
also be set :
H
In heating (for P03 = 1)
P27
External air temperature at the start of drift
P28
External air temperature at the end of drift
P22
Heating maximum water return setting
at the end of drift
H
In cooling (for P02 = 1)
P30
outside air temperature at the start of drift
P31
outside air temperature at the end of drift
P32
Cooling minimum or maximum water return setting
at the end of drift
If P07 = 1 (PCR), the parameters P02, P30, P31 and P32 are
not accessable.
P35
P29
P28
P27
P36
P32
P30
P31
Water return setting
°
C
in heating mode
External air temperature
°
C
Water return setting
°
C
in cooling
mode
External air temperature
°
C
"
Recommendations for parametering a PCR
installation (P07 = 1)
H
In heating
Regulation as a function of the outside temperature : P03 = 1
Adjustment of the water law :
P36 = 20
°
C and P27 = 20
°
C
P28 = Min. basic outside temperature of the area
P29 = water return temperature used in the calculation of the
house thermal losses at the min. basic outside temperature
(example 35
°
C, max. 40
°
C)
H
In cooling
P36 = 21
°
C inlands
P36 = 23
°
C at sea-side
"
Starting the unit
Once the parameters have been set, operate the emitters in
cooling or heating to have a thermal load, so that the thermody-
namic unit can operate.
You can then start the unit. To do so, move the parameter P15
to value 1 by pressing simultaneously on
+
and
RESET
.
Press key
CONFIGURATION
to exit the configuration mode.
The internal safety devices of the unit are engaged. If a safety
device has tripped, the fault must be found, reset the safety
device and press the MRS5.1
RESET
key.
The thermodynamic unit start can only occur after a 2mn period
corresponding to the scrutinization period of all safety devices.
NOTE : To stop the unit, outside the cases of emergency, use :
– either the Climbox 2 programmer (passage to mode Stop),
– or a all or nothing external order which sends a stop order to
the thermodynamic assembly,
– or the remote control MCAD5 (passage to mode STOP).
Note : Be aware of a risk of frost if a cut in the electrical supply
occurs.
#
H
Check
– that the discharge is heating (reading of parameter P55),
– that the absorbed amperage is normal (see table “ electrical
characteristics ”),
– the operation of all the safety devices (see the table “ regula-
tion and safety device ”).
Thermodynamic phenomena related to the installation, which
can arise when starting
H
Intake pressure too low
– Presence of air in the hydraulic circuit.
– Circulation too low, insufficient flow.
– Lack of heating load.
– Ventilation not correct, obstacle at intake or discharge, recycl-
ing.
H
Condensing pressure too high
– Ventilation not correct (obstacle to intake or discharge).
– Air too hot at intake (recycling).
– Presence of air in the hot water circuit.
– Circulation too low, insufficient flow.
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