EVCO ECK256J220S001 - Manual (Page 2)

2
1 '96
OPERATION
Analogue memory; available parameter:b0
An analogue memory is provided for the unit to maintain temperature control in the event of short power supplly failure; in this case
the unit will start and revert to the same operating condition that it had before the failure.
During "START" mode, when the unit switches off and again because of power supply failure, if the time between off and on is less
than the protection time than the unit will switch on and revert to the operating conditions and settings that had been stored in memory
before it had switched off.
Vice-versa, if the time between off and on is longer than the protection time, at switch on the unit automatically changes to "STOP"
mode (output non active), the buzzer gives an intermittent signal while the display shows the label "PF" alternated with the temperature
measurement.
It is possible to exit this alarm condition by pressing the START/STOP key for more than one second; the unit will then revert to the
same operating condition thai it had before the failure.
T2 key= DO W N /M UTE
M ELT key
M ELT led S TA RT/S TO P led
T1 key = S ET/UP
S TA RT/STO P key
Fig. 1 - User interface
Pre-heat (melting); available parameters: b1, b2, b5, b6, b7
The "pre-heat" function is included to avoid fast temperature increases in the deep fryer oil sump at unit start up and to facilitate the
melting of the fat used for frying.
During this phase the output is energised with cyclic control until the temperature threshold Melt is reached (parameter b2); parameters
b5 and b6 can be used to set the duration of this part-load cycle and the percentage of cycle time when the output must be energised.
b6 = 40%
"pre-heat" function
activation
b5 b5 b5
tim e
O N
O FF
output
relay
Fig. 2 - Output relay operation during "pre-heat" function
During "STOP" status, the "pre-heat" function can be activated by pressing the START/STOP key for more than one second if the probe
temperature measurement is lower than threshold Melt (parameter b2) and:
- paramerter b1 is set to 1
- funtion "conservation" has been selected during "STOP" status by pressing the MELT key for more than one second;
in this way the unit is also set to switch automatically to "conservation" after the "pre-heat" phase has been completed
(this situation is indicated by MELT LED being switched on during "STOP" status).
If these two conditions are not satisfied, pressing the START/STOP key for more that one second during "STOP" status will immediately
activate the P.I.D. temperature control unit the required temperature has been reached. Then, when the MELT key is pressed for more
than one second, the P.I.D. control is terminated, the "preriscaldo" function starts and the unit is set to switch automatically to
"conservation" phase after "pre-heat".
During "pre-heat" function, the START/STOP LED flashes to indicate that tempeature control is active; the MELT LED flasches only
when the unit is set to switch automatically to "conservation" phase at the and of the function.