Temperature Offset - Sanremo ROMA TCS SED Instruction Booklet

ENGLISH
SWITCHING OFF A SINGLE GROUP
If it is not being used, and to avoid any alarms, it is possible to switch
off the desired group individually by means of the programming phase,
bringing the temperature one step below the minimum limit with the
button K-/PROG.GR1 until the word OFF appears.
During normal operation the word OFF will appear on the display with
the decimal point for the group that is switched off.
PID THERMOREGULATION
The thermoregulation of temperatures is achieved by commanding the
Triac according to a proportional, integrative and derivative algorithm, which is the same for all 3 groups (see TECHNICAL LEVEL Programming for
the parameter setting); this is done 10°C before reaching the set temperature.
Before the 10°C proportional band, the command given to the Triac is of the full-mode type.
The temperature regulation is carried out following an algorithm that uses three constants:
- proportional: P .
- integrative: i.
- derivative: d.
The three constants must be adapted to every type of coffee machine according to the power characteristics of the resistance, the
dimensions of the boiler, its heat loss, etc.
The "setpoint value or T°SET" is the boiler temperature that must be maintained.
• If the temperature swings excessively around the T°SET in the heating or holding phase, with peaks of value that do not diminish over time, it
is necessary to decrease the proportional constant: P .
• If the temperature swings excessively around the T°SET in the holding phase, with a very long period of oscillation and with peaks of value
that do not diminish over time, it is necessary to decrease the proportional integrative constant: i.
•
If the temperature has an excessive oscillation and is often larger than the T°SET during the heating or holding phase, but it attenuates as time
passes, it is necessary to decrease the derivative constant: d.
• If the temperature tends to be below the T°SET value during the heating phase, getting farther away from it, it is necessary to increase the
derivative constant: d.
•
If the temperature tends to be constantly below the T°SET value during the heating phase, it is necessary to increase the proportional constant
"d" and also slightly increase the integrative constant "i".
• If the temperature tends to be constantly below or above the T°SET value during the holding phase, it is necessary to increase the integrative
constant "i" and also slightly increase the proportional constant "P".

TEMPERATURE OFFSET

This function allows you to set a temperature offset by means of which it is possible to view on the display the temperature of the water coming
down from the group with respect to the temperature measured by the probe NTCx (usually situated in the boiler), which will certainly not have the
same value due to physical heat loss.
The offset value must be calculated by actually measuring the temperature of the water coming down from the group with respect to that
shown on the display at the same moment.
This measurement is to be done by the customer as it varies according to the type of coffee machine and must be carried out first of all
with the offset value set at 0°C.
This function can be better illustrated with an example:
if the TSET = 100°C
with OFFSET = 0°C thermostat control temp. = T°SET + OFFSET = 100°C on display = 100°C
with OFFSET = 10°C thermostat control temp. = T°SET + OFFSET = 110°C on display = 100°C
Note the difference in the thermostat control temperature but not in the temperature on the display.
The temperature offset is set by default at 10°C.
TECHNICAL LEVEL PROGRAMMING
Using the TECHNICAL LEVEL Programming it is possible to set:
- the heating groups
- the number of keyboards used
- the temperature display
in degrees Celsius or Fahrenheit
PID
parameter on the display F.01
parameter on the display F.02
parameter on the display F.03
68
rotation
T°SET
rotation
rotation