EVCO c-pro nano CHIL - Manual (Page 126)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL
Pag. 126
Note 1. Parameter PH44 is linked to operation of the 4
th
transducer (AI04), with the following
meanings:
⋅
PH44 = 0 (Probe figures disabled)
⋅
PH44 = 1 (Probe used as DI06)
⋅
PH44 = 2 (Probe used as NTC external-temperature probe)
⋅
PH44 = 3 (Probe used as NTC accumulation probe)
⋅
PH44 = 4 (Probe used as 4..20 mA for evaporating pressure Circuit # 1)
Note 2. If AI04 is to used as digital input DI06, correct configuration is as follows:
⋅
PH44 = 1
Note 3. If AI04 is to used as accumulation temperature (see para. 6.17.9), correct configuration is
as follows:
⋅
PH44 = 3
6.17.3 Evaporation-probe configuration
If AI04 is to used as evaporation pressure Circuit # 1, correct configuration is as follows:
⋅
PH24 = 0 (Disables the external probe)
⋅
PH44 = 4
If AI08 is to used as evaporation pressure Circuit # 2, correct configuration is as follows:
⋅
PH45 = 2
⋅
PG02 = 1 (Expansion enable)
Note: Parameter PH45 is linked to operation of the 8
th
transducer (AI08), with the following
meanings:
⋅
PH45 = 0 (Probe figures disabled)
⋅
PH45 = 1 (Probe used as DI012)
⋅
PH45 = 2 (Probe used as 4..20 mA for evaporating pressure Circuit # 2)
6.17.4 Dynamic set point
Via parameter Dynamic set point enable PH27, it is possible to perform compensation of the
dynamic set point on external temperature. In this case, the regulation set point will take on a value
between the standard set point (equivalent to the External-temperature initial threshold) and the set
point plus a Dynamic offset (equivalent to the External-temperature final threshold), both for
chiller and heat pump operation. Between the two compensation points, movement is linear, and the
curve takes on a different meaning, according to the offset sign.
With offsets of less than zero value, behaviour is as follows: