Table of Contents
Advertisement
4.1 Parameters description
Password
USER:
To gain access to the USER parameters, press the PRG button for 5 seconds. Then, insert the USER password
(22) and finally press SEL.
FACTORY:
To gain access to the FACTORY-set parameters press PRG and SEL together for 5 seconds. Digit the
password (available on request), then press SEL.
Probe (parameters "/")
/1: Type of probe at evaporator inlet, B1
This parameter indicates the type of temperature probe to be placed at the evaporator inlet. It is possible to use either a
Carel NTC probe or a ON/OFF contact operated by a thermostat. It is necessary to have a software and a hardware
compatible. If you are using a NTC probe, bridge terminal 1 and 2 on pin strip P1. With an ON/OFF probe (P1 with
terminal 2 and 3 bridged) inputs - detected as closed - require the activation of outputs both in the Cooling and in the
Heating operating modes; the message "On" will be displayed to indicate the unit is operating ("OF" means input
detected open). In AIR-AIR units with two compressors, if the B1 ambient air probe is selected in ON/OFF mode, the B4
probe will be automatically selected in ON/OFF mode so as to allow the control of both compressors through an ambient
thermostat with 2 Contacts (Condensing unit function mode).
/2: Type of probe at 1st and 2nd evap. outlet, B2 and B4
This parameters indicates the type of probe to measure water temperature at the evaporator outlet (B2 and B4). It is
possible to use either a Carel NTC probe or a ON/OFF contact operated by a thermostat. It is necessary to have a
software and a hardware compatible. If you are using a NTC probe, bridge terminals 1 and 2 on pin strips P2 and P3;
bridge terminals 2 and 3 for accepting ON/OFF signals.
If you are using an ON/OFF contact and inputs are detected open:
•
antifreeze heaters will be activated
•
antifreeze alarm will be activated after any delay on start up (A3 parameter)
/3: Type of condensation probe for circuit no. 1 and 2, B3 and B5
This parameter indicates the operating logic of the analog inputs relative to the condenser probes meant to control
defrosting and fans. You can use NTC Carel probes, pressure transducers (4÷20mA current inputs) or no probes at all.
For NTC Carel probes bridge terminals 1 and 2 on pin strips P4 and P5. In order to accept 4÷20mA probes, bridge
terminals 2 and 3 on pin strips P4 and P5. If no sensors are used at all, bridge the analog and set P4 and P5 in 1-2
position; the defrosting procedure will be disabled as well as the use of the condensation-removal fans. In water
/water heat pumps with gas reversibility, the antifreeze condensation function will be disabled as well. If NTC
Carel probes are used, on compressor start-up the fans will be actuated for a time-lapse equal to Fb, independently of
the condensation temperature; this allows to anticipate the action of the compressor and improve the condensation
regulation.
/4: Minimum current input
This parameter allows to set 4mA as the pressure value for the pressure probe.
/5: Maximum current input
This parameter allows to set 20mA as the pressure value for the pressure probe.
/6: Calibration of evaporator inlet water probe, B1
It allows to add an offset to the value measured by B1.
/7: Calibration of evaporator outlet water probe at circuit no. 1, B2
It allows to add an offset to the value measured by B2.
/8: Calibration of condensation probe circuit no.1, B3
It allows to add an offset to the value measured by B3.
RG66000889-REV.OO
16
Advertisement
Table of Contents
