ECKELMANN VS 3000 User Manual

Version 2.02 15.05.2007
Function of VS 3000
47
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3.36.8 Sequence of Z2 coldroom discharge gas defrosting
When Z2 coldrooms are provided with auxiliary defrost or are defrosted separately, the defrost sequence for Z2
coldroomsisasfollows
Signal: Start delay-
for drain
heater5 to
30 min .
30 sec
delay
Defrost
time 10 to
30 min
Defrost ter-
mination
1 Drain heater
Z2 coldrooms
No start delay if power failure occurs dur-
ing defrosting
2 SV2.2/2 close suction line SV 2.2/2 closes 10 - 100 sec after SV 3.2
3 SV1 common discharge
line
4 SV 3.2/2 discharge gas
feed
SV 3.2/2 closed 5 sec after SV1
5 Defrost command to Z2
coldrooms via CAN bus
6 Disable Z2 coldrooms via
bus
Refrigeration points disabled until t0_Z2 <
t0_Enable.Min. 10 sec, max. 5 min after
SV 2.2/2 opens.
7 Setpoint toggle Z1 pack
(no shift)
AL 300/CI 3000 displays ”A” before t0 set-
point in overview. Setpoint toggle only
when enabled by parameter setting
8 Forced cooling of all Z1 re-
frigeration points and Z2
cases via bus
Forced cooling only when enabled by
parameter s etting.
Refrigerated display cases can continue on cooling while coldrooms a re defrosting.

ECKELMANN VS 3000 Specifications

General

Brand	ECKELMANN
Model	VS 3000
Category	Controller
Language	English