EVCO c-pro nano CHIL - Manual (Page 103)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL
Pag. 103
- Mode = Operating mode (1 = Winter)
- SPH1 = NZ winter set point
- PC11 = Regulation type (1 = Neutral zone)
- PC14 = Neutral zone
- PC17 = Extra time for out-of-zone request
- PC23 = Heat pump set point lower limit
- PC24 = Heat pump set point upper limit
If the outlet temperature still remains outside the neutral zone, even after the extra-time interval set
in parameter PC17 has elapsed, the switching ON or OFF of a further power step will be requested.
The setting of parameter PC18 = 1 activates an output-temperature auto-adaptive regulation
function, in which the neutral zone is calculated in such a way as to take into account the dynamic
properties of the plant and load variations. In particular, the neutral zone can vary taking into
account compressor timings and the number of start-ups per hour. In this case, the value of
parameter PC14 (neutral zone) only makes sense at unit start-up, whereas it will be recalculated –
within the minimum PC15 limit and maximum PC16 limit – to “adapt” to an intermediate operating
situation, as compared with the maximum number of hourly start-ups (parameter PC09).
Note: In the case of a twin-circuit system (PG01=2), regulation is carried out on the average value
of the two output-temperature probes.
If there should be an error in one of the two probes, regulation is carried out on the other,
functioning probe. If the presence of an error on both probes, regulation is no longer feasible, and
the number of compressors to be activated for each circuit can then be selected via parameter PC10.
6.5.3 Compressor activation from digital input
On MOTOCONDENSING units, instead of using thermostat regulation on input or outlet
temperature, compressors are activated according to the status of an input contact (one for each
step). By setting parameter PC11 (Regulation type) to the value 2, this regulation is activated; it
maintains unaltered both the relative ON/OFF timings of compressors and their rotation functions
among themselves. In order to correctly configure this regulation, the following parameters must be
set:
- PC11 = Regulation type
- Hd11 = Digital input position for 1
st
step
- Hd12 = Digital input position for 2
nd
step
- Hd13 = Digital input position for 3
rd
step
- Hd14 = Digital input position for 4
th
step
- Hd15 = Digital input position for 5
th
step
- Hd16 = Digital input position for 6
th
step
- PH29 = Digital input logic
SP
Neutral zone
Compressor
shutdown
Compressor
start-up
Outlet T