AKO 15640, Руководство пользователя

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8.2.- Defrost control
Type of defrost
This is chosen using the Defrost type parameter that defines the behaviour of the controller during the defrost
process.
DEFROST DEFROST
DRIP TIME
FAN START UP DELAY
"DEF” MESSAGE
CONTROL CONTROL
time
ºC
Max. B C
A
SP
SP+Dif.
D
DEFROST DEFROST DRIP TIME
FAN START UP DELAY
"DEF" MESSAGE
CONTROL CONTROL
Description Parameter
A Time between two defrost starts Defrost frequency
B
Maximum defrost duration Defrost duration
C Maximum duration of the defrost message Message duration
D Final defrost temperature by probe 2 Defrost final temperature
SP Temperature set point Set point (SP)
Dif. Temperature set point differential Sensor 1 differential
Types of
defrost
Description Parameter configuration
Compressor
stopping
The compressor stops and defrost is carried out statically.
H
Defrost type: Resistances
X
Fans state during defrost: Disconnected
By air
The fans are activated and the compressor stops, defrost is
carried out forcing the movement of air through the
evaporator.
H
Defrost type: Resistances
X
Fans state during defrost: Connected
By resistances
The defrost resistances are activated and the compressor stops,
defrost is carried out by the heat supply from the resistances.
H
Defrost type: Resistances
X
Fans state during defrost: Disconnected
By Cycle
inversion
A 4-way valve is activated that inverts the cooling generator
circuit and the compressor starts up, forcing the defrost.
H
Defrost type: Reverse cycle
X
Fans state during defrost: Disconnected
By simple
hot gas
A valve is activated that sends the discharge from the
compressor to the evaporator inlet. Using check valve
prevents the hot gas from returning along the liquid line.
H
Defrost type: Reverse cycle
X
Fans state during defrost: Disconnected
8.2.- Defrost control
Type of defrost
This is chosen using the Defrost type parameter that defines the behaviour of the controller during the defrost
process.