Click to expand Tap to zoom MHS Boilers Servo Control Motor Actuator DHW RFSS2221BQ by MHS BOILERS - ORIGINAL SPARE PART Servo Control Motor / Actuator - DHW 3 point, 230V Use: Futura Bitherm PN: RFSS2221BQ Quantity Add to Cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.