Carel gaSteam UG045 - Page 64

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will be calculated between the main probes, depending on the defined weight, and the limit probes
will also have their own average, again depending on the defined weight.
For “humidity (two probes)“ or “temperature (two probes)” control, only a group of main probes can be
defined. Wired probes can be connected to the main probe input (1U) and the limit probe input (5U),
which will be used as a second probe, with the average calculated. If using wireless probes (maximum of
four), only a group of main probes can be defined, with the average calculated, depending on the
defined weight.
For the connections of the signals and/or probes, see chap. “Electrical connections”.
7.2.2 Weighted average of the probes (Installer menu)
If using two temperature probes or two humidity probes, the humidifier controller will calculate the
weighted average of the probe readings. In this way, two probes can be used, for example humidity
probes, at opposite ends of the room, calculating the average.
Index Parameter Description
Ea02 Weights
Set the weight of the probes
Default: 100
Range: 0-100
Step: 1
The weight of each probe is expressed with a value from 0 to 100.
The weighted average is calculated as follows:
Weighted average = ((S1×p1)+(S2×p2)) / (p1+p2)
where “Si” is the probe reading, and “pi” the relative weight.
To calculate the arithmetic average, equal weights should be set (for example: p1 = p2 = 100).
If using wireless probes, the weights of each device can also be defined; in this case a maximum of four
wireless probes can be connected, and consequently the formula shown previously for calculating the
weighted average is extended to four devices.
7.2.3 Proportional control configuration
If using control proportional to external signal or control proportional to external signal with limit probe,
the hysteresis, minimum and maximum production need to be set.
Index Parameter Description
Ea03
Control
proportional to
external signal
Set the hysteresis, min production and max production
Default:
Hysteresis = 5%
Minimum production =25%
Maximum production = 100%
Possible settings:
Hysteresis = 0.5-100%
Minimum production =0-10%
Maximum production = 0-100%
7.2.4 Control from external ON/OFF signal configuration
If using control with On/Off signal, the maximum production needs to be set.
Index Parameter Description
Ea04 External ON/OFF
Set the maximum production with external ON/OFF control
Default: 100%
Range: 0-100%
7.2.5 Modulation configuration (Installer menu)
If using modulating control, the related parameters need to be set:
64|7. User menu and unit configuration
gaSteam - UG +0300090EN rel. 1.2– 09.10.2018