Replacement Power Head for Taco Zone Sentry Valve, Normally Closed

Replacement Power Head for Taco Zone Sentry Valve, Normally Closed
Views: 4367 Product Code: ZA024Q4A1

MPN: ZA024Q4A1

Weight:0.50 lb

Dimensions (L x W x H ): 6.00 x 2.50 x 2.50

Usually ships: Upon availability
Qty: Add to Cart


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The ZA024Q4A1 from Taco is a Replacement Power Head for Taco Zone Sentry Zone Valves, Normally Closed. It provides on-off control in both open and closed hot or chilled water hydronic systems.

The state of-the-art features of Actuator Head make the control truly universal and will prove to be both reliable and efficient. It is loaded with innovative technology and boasts a new Prostar Capacitor and a reliable high-torque, high-efficiency miniature motor. The quick Snap-in connects on the back of the valve ensuring a simple, secure and fast wiring hook-up. A green LED light shows full functionality of the valve


  • Taco ZA024Q4A1 Zone Sentry;
  • Replacement Actuator Head;
  • Normally Closed Position;
  • Uses up to 93% less energy than other commonly installed zone valves;
  • Multi function LED assists with troubleshooting;
  • The actuator mounts on the valve in either direction;
  • Replaces Taco EN024Q4A2 and AN024Q4A2 Actuator Heads;

Technical Specifications:

  • Maximum Operating Pressure: 300 psi;
  • Maximum Shutoff Pressure: 125 psi;
  • Fluid Temperature Range: 20 to 240F, at 135F ambient;
  • Service: Closed systems;
  • Optional open system configuration;
  • Up to 50% Glycol;
  • Ball Rotation Speed: Full Open to Full Close (90 turn), 5 seconds (after charge time);
  • Full Close to Full Open (90 turn), 5 seconds (after charge time);
  • Seat Leakage: Drop-Tight Close-Off;
  • Electrical Rating: 24 VAC, 60 HZ, 0.48 Amps;
  • Do not exceed number of valves per transformer rating;
  • Example: Do not use more than 12 zone valves per 40VA transformer;
  • Power Consumption, Charging: 11.4 Watts, 0.48 Amps;
  • Power Consumption, Power On: 1.44 Watts, 0.06 Amps;
  • Heat Anticipator Setting: 0.5 Amps;
  • End Switch Rating: 1 Amp at 24 VAC;


  • 1 year manufacturer's warranty from the date of purchase 


Product Specs
Electrical Rating:24 VAC, 60 HZ, 0.48 Amps;
End Switch Rating:1 Amp at 24 VAC
Fluid Temperature Range:20 to 240F, at 135F ambient
Full Close to Full Open (90 turn), 5 seconds (after charge time)Drop-Tight Close-Off
Heat Anticipator Setting:0.5 Amps
Maximum Operating Pressure:300 psi
Maximum Shutoff Pressure:125 psi
Power Consumption, Charging:11.4 Watts, 0.48 Amps
Power Consumption, Power On:1.44 Watts, 0.06 Amps;
Service:Closed systems
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