Pego NECTOR, Руководство по эксплуатации и обслуживанию

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NECTOR
Page 35
OPERATION AND MAINTENANCE MANUAL
Rev. 03-21
For the correct management of the system:
- Connect the cycle reversal solenoid valve to the defrost output.
- Connect the liquid solenoid valve to the liquid solenoid valve outlet (AUx = +/- 8)
Doing so during the defrosting phase will ensure closing of the liquid solenoid valve and activation
of the hot gas defrosting cycle.
For capillary systems (without thermostatic valve) simply control the cycle reversal solenoid valve
using the defrost control.
DEFROST WITH THERMOSTAT RESISTORS
Parameters: d1 (3°), d21 (1°), d22(1°), d31 (1°), d32 (1°).
Set parameter d1=2 to manage the defrost with resistors within a time limit. During defrosting the
defrost relay is activated if the temperature read by the defrost probe is below the defrost end
threshold (d21 or d22). The defrost phase lasts d31 / d32 minutes, regardless of the relay status.
This allows a better defrosting of the evaporator with consequent energy savings.
AMBIENT TEMPERATURE DISPLAY
DURING DEFROSTING
Parameters: dFd (2°).
During defrosting and for the next minute:
-
if dFd=0 the display continues to display the current ambient temperature value.
-
if dFd=1 the display continues to display the last ambient temperature value detected before
defrosting begins.
-
if dFd=2 the display shows the words "dEF”.
CHANGING THE DATE AND TIME SETTINGS
Parameters: Hr (2°), min (2°), Yr (2°), Mo (2°), dy (2°).
Modification of the date and time settings takes place simply by varying the
dy, Mo, Yr and Hr,
min value set following the parameter setting procedure, described in chapter 5.10 of this manual
(2nd level programming).
An advance of the date entails loss of the data recorded since that period, in the case of
data export to the TeleNET supervisory system.
PUMP DOWN FUNCTION
Parameters: AUx (3°), Inx (3°).
Setting the parameter
AU1/2=+/- 3 and in1/2/3/4/5/6/7 = +/- 4 activates the compressor stop
operation in pump down. The digital input IN1/2/3/4/5/6/7 becomes the working pressure switch
input and directly manages the compressor output. The AU1/2 relay becomes the evaporator
solenoid call and is managed by the thermostat cold call.
5.24
5.25
5.26
5.27