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Rev 2.1 Oct-15 Page
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To change the pressure gauges turn the screw slightly.
Black screw for Range setting
Silver screw for Differential (Diff)
Pressure setting for switches with automatic reset.
1. Set the cut-in pressure on the “CUT-IN” scale (range scale),
2. Set the differential on the “DIFF” scale.
High and Low Pressure Settings (Boiler control)
The high pressure switch is pre-set to cut out at 3.0 bar(g) and will not re-set until the system pressure has
dropped to 2.0 bar(g).
The low pressure switch is pre-set to cut out at 0.5 bar(g) and will not re-set until the system pressure has
increased to 0.9 bar(g).
These switches can be adjusted using the appropriate nut on top of the switch housing. Note this switch is for
boiler cut out