KGL Operating Manual – VS 3010 BS
2018-07-02
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80 178
4.15.4 Course of the common discharge gas defrosting Z2
Signal
Lead
time
Drain
heater
5..30
min.
Unload
to one
stage
Pump down
until
suction gas
pressure
reaches
Low LP-Z2
Defrost time
10..30 min.
1
Drain heater Z2 cold rooms
No lead time in the event of power failure
during defrost and for separate defrosting
2
SV 2.2/1 and SV 2.2/2 Close suction line
4 minutes monitoring time for the pump
down
3
SV3.2/1, SV3.2/2 discharge gas feed
and SV1 common discharge line
4
Defrost command to Z2/2 cases via
CAN bus
5
Toggle setpoint Z1 circuit (no shift)
AL 300/CI 3000/CI4000 show an
A
before the t0-Z1 setpoint in the overview
6
Forced cooling of all Z1 cases via bus
7
Disable of the message
LP-Z2
measuring loop error
5 minutes after opening the suction line
8
Z2 compressor disable 1.5 minutes
before defrost termination
Pump
down or
compressor
disable
Without oil equalisation line:
compressor enable if t0_Z2 < t0-enable
With oil equalisation line:
compressor enable if t0-Z2 < t0-Z1
Max. disable after defrost = 5 minutes
4.15.5 Sequence of the discharge gas defrosting of Z2 cases
Signal
Pump down
time
30 sec.
Defrost
time
10..30
min.
1
SV 2.2/1 and SV 2.2/2 Close suction line
2
SV3.2/1, SV3.2/2 discharge gas feed and SV1
common discharge line
3
Defrost command to Z2/2 cases via CAN bus
4
Toggle setpoint Z1 circuit (no shift)
AL 300/CI 3000/CI4000 show an before the t0-Z1
A
setpoint in the overview
5
Forced cooling of all Z1 cases via CAN bus
