SIEMENS Actuator GCA221.1U

Core Features "GCA221" Series & Functional Design: The "GCA221" denotes Siemens’ compact electric linear actuator series, and the "1U" (Universal) model emphasizes broad compatibility with small hydronic valves. It is a 24V AC-powered linear actuator with a 10 mm stroke length and 600 N thrust rating (≈61.2 kgf)—ideal for 2-way/3-way hydronic valves (e.g., residential underfloor heating valves, small commercial fan coil unit valves) where 24V low-voltage power, universal mounting, and light-duty performance are prioritized. Flexible Control Modes & Feedback: Equipped with dual control options to match light-duty flow needs: On/off control (24V AC input): For simple full-open/full-close scenarios (e.g., residential zone heating), ensuring basic flow regulation with rapid actuation (≈3.3 seconds/full stroke). Modulating control (0–10V DC input): For variable flow applications (e.g., small office FCUs), enabling valve opening adjustment with ±2.5% positioning accuracy—sufficient for stable room temperature control. It includes built-in analog position feedback (0–10V DC) for real-time valve status monitoring, compatible with residential smart thermostats or small commercial BMS. Ultra-Compact & Lightweight Build: Engineered with a flame-retardant plastic housing (UL94 V-0) and a lightweight design of 0.55 kg (1.21 lbs), suitable for direct valve mounting (via mini ISO 5211 flange) or bracket mounting in tight spaces (e.g., residential boiler closets, small HVAC enclosures). The housing features IP44 protection (dust-resistant, splash-proof), making it compatible with indoor residential and small commercial environments (e.g., apartments, small cafes). Safety & Reliability Features: Built with essential safeguards for long-term operation: Overthrust protection: Automatically stops the motor if thrust exceeds 600 N (e.g., valve stem jamming from mineral buildup), avoiding damage to the valve or actuator. Thermal overload protection: Shuts down the motor in case of overheating (e.g., prolonged operation), extending component lifespan. 24V low-voltage safety: Designed for 24V AC (50/60 Hz) input with ±10% voltage tolerance, eliminating electrical hazards in occupied spaces. Universal Installation & Integration: Designed for plug-and-play setup with no complex programming—works with Siemens residential controllers (e.g., RLU series) and third-party devices via standard 24V on/off or 0–10V signals. The "U" model includes a universal mini ISO 5211 flange (fits most small hydronic valves) and color-coded wiring terminals, reducing installation time to under 15 minutes for most applications. Typical Applications SIEMENS Actuator GCA221.1U is engineered for light-duty linear control of small hydronic valves—ideal for scenarios needing 600 N thrust, 10 mm stroke, and universal compatibility in residential or small commercial systems. Key use cases include: Residential Underfloor Heating: Controlling 2-way valves in residential underfloor heating zones (e.g., bedrooms, living rooms). Modulating control adjusts hot water flow to match room temperature, while compact size fits manifold enclosures—complying with EN 12831 (residential heating design) and ASHRAE 90.2 (residential energy efficiency). Small Commercial Fan Coil Units (FCUs): Regulating valves in small FCUs for office cubicles or hotel rooms. On/off control manages basic cooling/heating, and IP44 protection withstands FCU enclosure moisture—complying with EN 14511 (air handling units and FCUs). Residential Mini-Split Hydronics: Adjusting valves in residential mini-split hydronic add-ons (e.g., ductless heating coils). 24V low-voltage compatibility aligns with mini-split control systems, and lightweight design avoids coil strain—complying with EN 14511 (small HVAC components). Light Commercial Beverage Systems: Controlling small valves in commercial beverage dispensers or water coolers. Simple on/off control maintains fluid flow, and universal flange fits multiple valve models—complying with EN 15502 (food/beverage equipment standards).