ALASKA / SIBERIA / BERING SERIES · Cooler EF
AIR/WATER
–
WATER/WATER
© FLUIDRA 2019 ALL RIGHTS RESERVED. PROPRIETARY DOCUMENT.
Pag: 25
ENGLISH
6.4.4
AUTO MODE (CHILLER MODELS)
Start-up process:
Start-up conditions: Water intake temperature < (Setpoint temperature - Auto mode
temperature differential); Compressor stop time ≥ Compressor delay time, then it enters Heat
mode.
If the water intake temperature > (Setpoint tempe Auto mode temperature differential);
and the Compressor stop time
≥ Compressor delay time, then it enters Cool mode.
Stop process:
Compressor 1 stops, Compressor 2 stops 10s later, the fans stop and the water pump stops 30s
later.
6.4.5
PROCESO DE DESESCARCHE
The controller will supervise the temperature in the evaporators when the machine is in
heating mode, and decide whether need to defrost according to the working time of the
machine in that continuous low temperature state. In other words, the defrosting
calculagraph begins to count when the machine evaporator temperature is lower than
“defrost start temperature”, and turns on the defrosting when the value of time reaches
“defrost start time”. The calculagraph will be cleared if the evaporator temperature i
s higher
than “defrost start temperature” when counting, and it begins to count again when the
evaporator temperature is lower than “defrost start temperature”. In other words, the value
of defrosting calculagraph shows the continuous low temperature working time of the
machine (For 2 compressor systems as long as a compressor system satisfies the conditions
for defrosting, the other system will also defrost).
DEFROST SEQUENCE:
0S
COMP1 off
5S
COMP2 off
30s
60s
DEFROST
(F37=0,F24=2)
4-way valve on
COMP1 on
95s
COMP2 on
0S
COMP1 off
10S
40s
75s
DEFROST
off(F37=0,F24=2)
4-way valve off
COMP2 on
COMP1 on
0S
COMP1 off
5S
COMP2 off
30s
60s
DEFROST
(F37=1,F24=2)
4-way valve off
COMP1 on
95s
COMP2 on
0S
COMP1 off
10S
40s
75s
DEFROST
off(F37=1,F24=2)
4-way valve on
COMP2 on
COMP1 on
5S
COMP2 off
5S
COMP2 off