ICI - Innovative Creations, Inc. AX - Manual (Page 7)

ACCESSORIES
5
2.1.2 Operation pressure switch
Device that controls the boiler pressure and holds the pressure between the set maximum and minimum
values.
Instructions for adjustment.
The electric switch has three screws (2-1-3 from right to left).
On reaching the set pressure, the contact 2-1 switches to 2-3.
Adjustment of the pressure switch (Fig. 3):
a) Turn the knob (1) until the scale indicator (2) reaches the pressure at which the burner shall restart.
b) Remove the cover of the pressure switch and position the drum (3) at the value selected for the pressure
differential (stopping the burner) as to the diagram Fig. 4.
Example:
* Type of pressure switch: RT 5
* Scale indicator 9 bar
* Drum indicator: 4 corresponding to 2,1 bar
* Burner start:
9 bar
* Burner stop: 11,1 bar
Fig. 3 Fig. 4
2.1.3 Safety pressure switch
This switch is set at a higher pressure than the maximum of the control pressure switch, but always lower
than the opening pressure of the safety valves.
The safety pressure switch acts in the case of a fault to the control pressure switch and stops the burner
permanently. Restarting the burner can only occur after the steam pressure has fallen and after a manual
reset on the switchboard.
This pressure switch is adjusted in a similar manner to that of the control pressure switch, with the only
precaution that the drum indicator is set to 1 so that the differential is effectively nil.