General information
16
Manual reset in case of block
In the event that the burner is blocked by the safety pressure
switch, simply reset it manually.
To do this, use the control panel, pressing the blue "RESET" button
(circled in red in the image to the side) located to the right of the
"START" button, for a few seconds.
OPERATING PRESSURE SWITCH (2 for EXP version; 1 for IT version)
Device that controls the generator pressure and keeps it within the preset value.
Pressure switch calibration
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For pressure switches with AUTOMATIC reset: Set the cut-in pressure on the RANGE scale and the differential on the DIFF scale,
The restart pressure is the same as the cut-in pressure, less the preset differential value.
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for Automatic pressure switches with MANUAL reset or lock pressure switches at maximum pressure: Set the cut-in pressure
on the RANGE scale, the block pressure switch can only be manually reset by pressing the reset button with a screwdriver
when the pressure drops below or is equal to the cut-in pressure less the differential value.
LEVEL
LEVEL INDICATOR
The level indicator consists of a pair of valves connected to a reflecting box containing a prismatic glass.
This appliance is connected to the generator above and below the normal water level, while at the lower end it is equipped with
a purge valve to evacuate the sludge and keep the glass clean.
With these valves you can periodically test the efficiency of the level control system by performing the following operations.
Open the purge valve for a few seconds and close it again.
If the water disappears and then quickly returns to the starting point with large swings, it can be assumed that the level works well.
Whereas, if the water slowly returns or stops at a different point from the previous, it means that one of the communications is
obstructed; to ascertain which of the two and to try purging it, close the steam valve leaving the water valve open, then reopen
the purge valve: water should come from here, taking with it any muddy deposits formed in the ducts.
When the water valve is closed, the steam valve opens and steam must come out from the purge.
By closing the purge valve and leaving the two steam and water side valves open, the water must return to the starting point. If
this does not happen, clean the connecting ducts of the level indicator to the generator.
During commissioning, make sure that the vent and drain are closed. During operation the shut-off valves must be fully open.
To reduce the possible leaks, the indicators must be periodically insulated to check that the tightening torque of bolts is at least
30 Nm.
Do not proceed with maintenance without having firstly checked that:
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The generator pressure is equal to the atmospheric pressure.
–
The indicator temperature is equal to the environment temperature.
Maintenance must be carried out when:
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The crystal looses part of its transparency, partially opaque, signs of internal roughness due to erosion or corrosion as it
involves loss of geometry and reading becomes difficult.
–
Minimal leaks from the gaskets or shut-off groups are also noticed.
Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz
