EVCO c-pro mega RACK - Manual (Page 96)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 96
Band start Offset Setpoint Description
02:00:00 +0.3 1.3 bar From 02:00:00 to 07:15:00
07:15:00 +0.1 1.1 bar From 07:15:00 to 02:00:00
07:15:00 0 1.0 bar -
07:15:00 0 1.0 bar -
During an ERTC alarm (clock alarm), the time band function is automatically disabled and LED L2
on the display stays on, until the alarm is reset.
When the clock is within a time band, i.e. when the main suction setpoint is altered by the related
band offset, LED L2:
⋅
Flashes rapidly if there is an ERTC clock alarm.
⋅
Flashes slowly if only one of the compressor and fan setpoints is altered.
⋅
Remains on if both setpoints are altered by the time bands.
⋅
Remains off if there is no condition.
To enter time band management, press and hold display key K2 for approx. 2 seconds.
6.7.3 Fan time bands
By means of the parameter enable fan time bands (PT50) it is possible to enable the time band
function. The program provides up to four different bands with related offsets (different for each
circuit) to be summed up to the main supply setpoint.
Depending on the time band, on the basis of the current time, the program will automatically sum
the circuit offsets to the supply setpoint, outwith the selected bands, the setpoint will remain at the
value set by the parameter.
Time band configuration is based on 4 parameters (different for each circuit) for the setpoint offsets
and an additional four parameters (general) for the time band settings:
⋅
Time band 1 start - Circuit band 1 offset (1,2,3)
⋅
Time band 2 start - Circuit band 2 offset (1,2,3)
⋅
Time band 3 start - Circuit band 3 offset (1,2,3)
⋅
Time band 4 start - Circuit band 4 offset (1,2,3)
Hence, the time bands will be defined thus:
1. Time band 1 start ÷ Time band 2 start
2. Time band 2 start ÷ Time band 3 start
3. Time band 3 start ÷ Time band 4 start
4. Time band 4 start ÷ Time band 1 start
Where less than the four envisaged bands are set, in order to guarantee correct management
operation, it is essential to set the remaining band start parameters to the value of the last set band,
and obviously set the relevant offset to zero.
Management is the same as for compressor time bands, please refer to the previous section for any
further clarification.
When the clock is within a time band, i.e. when the main supply setpoint is altered by the related
band offset, LED L2:
⋅
Flashes rapidly if there is an ERTC clock alarm.