Honeywell Actuator B3-5S1 LKS210-04

The Honeywell Actuator B3-5S1 LKS210-04 is a two-stage servomotor designed for use in Honeywell two-stage diesel burners with a fully closed flap. It operates on a 230 V supply, consumes 4 W, and features a synchronous motor driving a reduction gear with a self-locking worm gear. The actuator has a protection class of IP44 per DIN 40050, weighs 1000 g, and is made of black, non-flammable, self-extinguishing synthetic material. It includes a cable gland of 1*PG11 and is installed using three M5 screws. Position is indicated by a simultaneously rotating arrow on a scale, and it requires no lubrication or maintenance.

When selecting an actuator of this type, ensure the supply voltage, power consumption, and protection class match the burner's specifications. The mounting must align with three M5 screws, and the cable gland size (e.g., 1*PG11) should fit the existing wiring. Verify the actuator's operating principle and control features (such as cams) are compatible with the burner's air damper adjustment mechanism. Always compare the physical dimensions and shaft type to the original part before installation.

Common failures include loss of synchronization, where the arrow no longer indicates the correct position, or the actuator fails to move the air damper due to gear wear or motor burnout. If the burner does not modulate correctly or the flap remains stuck, check the actuator's power supply and wiring connections. Overheating or unusual noise may indicate a failing motor or gear mechanism, requiring replacement.