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The multi-compressor control set (012.2018-0/AT) is an optional kit consisting of a power supply, a pressure sensor and a communication board, whose function
is to obtain the pressure of the air network in a network with up to 8 compressors. The communication board must be installed in the electrical box of one of the
compressors and connected in the data communication network together with the other equipment. The pressure sensor shall be installed at a point of the air
network used by all compressors to provide control pressure information to the GCI.
For more information on the multi-compressor control set, please contact the nearest SCHULZ DISTRIBUTOR.
Name
Code
P12.15
P80.01
P80.02
P80.03
P80.04
P81.01
P81.02
P81.03
Integrated
Compressor
Manager
P81.04
P82.01
Press ENTER to access the sub-menus.
Reading and editing with keyboard or ECO card
Table 8.12 - Integrated Compressor Manager
Text
Additional information
GCI Available
Select ON or OFF to enable or disable the GCI function. By enabling the GCI function, P80, P81 and P82 menus are enabled.
On, on with stop function or off (use of GCI reset function)
Note 1: If On - if subsequently the GCI is unavailable for any reason, product control is local again.
GCI enabled
Note 2: If On with stop function - If GCI is subsequently switched off (via a stop control routine as described above), the
GCI function remains in control of all compressors by placing them in relief or Off mode (the compressor shutdown time
will be the stop time set locally).
Relief pressure
GCI control relief pressure. Relief pressure range: not less than 0.2bar above load pressure.
GCI control load pressure. Range: sensor range and follows the protection limits of each compressor locally, that is,
Load pressure
overpressure and alarm pressures take precedence over the GCI operating pressure.
GCI rotation range
GCI rotation range or sequence interval. Range: 1 to 720 hours. Standard 24 hours.
# compressor GCI
Number of compressors controlled by GCI. Range: 2 to 8 compressors. Standard: 4 compressors.
Start delay time. Range: 0 to 60s. Standard: 3s
Operation: when the GCI is started the compressors will be loaded, according to requirements, respecting the time interval
GCI start delay
set in this parameter. The purpose of this function is to prevent starting several compressors at the same time, especially
when the system is starting.
Damping. Range: 0.1-10 bar. Standard: 1.0 bar.
In situations where placing only a new compressor under load is not enough to supply the required air demand, an addi-
tional GCI reaction is required, as long as the pressure is outside the tolerance ranges. The time until a new compressor is
loaded, to increase generation capacity, will be calculated dynamically depending on the urgency of the situation.
GCI's dynamic reaction algorithm is set as standard to meet the needs of most installations.
In some situations, as in the following examples, pressure variations can be very aggressive and disproportionate:
a) Inadequate air volume (tank volume)
Damping GCI
b) Very high air treatment differential pressure
c) Air network with improper size
d) Delay in compressor response
In these situations, GCI can act improperly, putting a new compressor under load without necessity, as the initial compres-
sor would still be in a start phase, without contributing to generate compressed air. If an increase in the tolerance range
is not enough, the GCI's dynamic reaction can be influenced by increasing Damping (DA), reducing the likelihood of an
unnecessary reaction.
Damping is adjusted on a scale of from 0.1 to 10, with 1 as standard. A factor of 0.1 equals keeping the reaction 10 times
faster than the standard, and a factor of 10 equals a reaction 10 times slower than the standard.
Tolerance is a pressure range above and below control pressures where pressure can be identified when abrupt changes
in air demand occur. Within this tolerance range the GCI control still uses the most efficient control.
GCI Tolerance
Tolerance is expressed as a pressure that sets the tolerance range width, as shown above.
For example, if Tolerance is set at 3psi (0.2bar), it means that GCI will implement an efficient response during a deviation
of 3psi below the load pressure. If pressure falls below the tolerance limit, GCI will adopt an emergency response until the
pressure returns to normal levels.
If the volume of the air tanks is inadequate, or fluctuations in air demand are significantly large, it is recommended to
increase the tolerance value to maintain efficient control.
If the tank volumes are large, pressure variations are small and the demand fluctuations are insignificant or gradual, then,
tolerance can be reduced to optimize pressure control.
Priority for compressors from 1 to 4, with 1 being the highest priority and 4 being the lowest priority, up to a maximum of
Priority comp1 to 8
8 compressors.
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PA+TO
PA
PT
PC
PC+TO
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