ACV Kit pressure switch A1003191

The ACV Kit pressure switch A1003191 is a safety component designed for use in burners and boilers. It operates at a supply voltage of 220 V and is supplied as a kit. This pressure switch monitors system pressure and automatically shuts down the boiler if limits are exceeded. It is compatible with ACV Prestige 50 MK2, HeatMaster 71, CA 150 Comfort, CA 250 Classic, and other models.

When selecting a replacement pressure switch of this kind, key parameters include the medium (air or gas), switching range and differential, connection type (thread or hose spigot), and electrical contact rating. The switch must match the voltage of the control circuit. Ensure the impulse tube is clean and correctly routed, and verify the setpoint against the original switch's marking or system design parameters.

Typical failure modes include a torn diaphragm, a blocked impulse tube, or a drifted setpoint. These can cause burner lockouts that may be misdiagnosed as ignition problems. The equipment may shut down automatically when pressure limits are exceeded.