Fig.7.k
Key
Steam_pr Steam production
Pmax Max production
Pmin Min production
y External signal
Tab.7.c
7.3.2 Fill cycles in PWM mode after drain to dilute cycles and high
level/foam (Installer menu).
After a drain to dilute cycle or high level/foam, the fill valve is opened to replenish water up to the
maximum level of the float. The addition of fresh water affects steam production, as it decreases the
average water temperature inside the boiler: to reduce the negative impact of fresh water on steam
production, the user can activate PWM mode for the fill cycles after drain to dilute cycles and due to high
level/foam.
PWM mode for fill cycles works as follows:
1. the mass of fresh water needed to replenish the water level is divided into smaller amounts of fresh
water;
2. by keeping the partial fill cycles as far apart as possible, each small amount of fresh water has more
time to heat up before more fresh water is filled. This reduces the negative impact of the fresh water
on steam production.
The duration of each fill cycle can be defined in seconds:
Index Parameter Description
Eb03 Part fill cycles
Enable part fillcycles.
Set the part fill duration.
Default:
part fill: enabled
fill time: 5 seconds
Range 1-199 seconds
7.3.3 Total drain due to inactivity (Installer menu)
For reasons of hygiene, it is recommended to empty the boiler so as to prevent water from stagnating
inside when there is no humidification request for an extended period. The user can set the automatic
total drain due to inactivity time in hours:
Index Parameter Description
Eb04 Drain do to inactivity
Enable drain due to inactivity;
set the hours of inactivity without production request that must expire
before draining
Default:
drain due to inactivity: enabled;
hour threshold: 72 hours
Range: 1-999 hours
Remarks: gaSteam must remain on in order to empty the boiler. The
display shows “DRAIN TO DILUTE” during the drain due to inactivity
68|7. User menu and unit configuration
gaSteam - UG +0300090EN rel. 1.2– 09.10.2018
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