Honeywell Fema DWAM Series Assembly And Operating Instructions Manual page 16

1.4 Setting the switching pressure
1.5 External electrical interlock in the switchgear cabinet (Circuit proposal)
A pressure monitor can also be used as a limiter if an electrical interlock is connected in series.
In pressure limitation in steam and hot water boilers, the external interlock is permissible only if it is
assured that the pressure monitor is of "special design".
The switching pressure is set using the setting
spindle. Before setting loosen the setscrew
located above the scale by approx. 2 turns and
tighten it again after setting.
The scale value corresponds to the upper
switching point (for rising pressure). The lower
switching point (for falling pressure) is lower by
the switching difference. The scale serves as
estimated value scale, a pressure gauge is
required for accurate settings.
On terminal connection housings the setting
screw is available after removing the cover.
Caution: Switch off voltage.
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