The XPB-1 from Taco is a X-Pump Block. It combines a heat exhanger, a variable speed mixing control, a system circulator pump and a heat source circulator pump in a single unit.You can set the Taco XPB-1 to operate as an outdoor reset control, a setpoint control or a Delta T limiting control without the use of special piping, balancing valves, closely-spaced tees, external controls or complex wiring. Four pipe connections complete the installation. Taco XPB-1 can handle up to 50,000 BTU's of heat transfer and is perfect for small to medium radiant heating or snow-melt additions to an existing system.

Electrical Specifications:

• Voltage: 120V
• Frequency: 60Hz
• Phase: 1
• Current: 2 Amps

Features:

• All-in-One Heat Exchanger, Dual-sided Circulators and Mixing Control Package;
• Brazed Plate Heat Exchanger (Stainless Steel Material, Easily Removable for Servicing, Provides Complete Isolation);
• Only 4 Pipe Connections Required;
• Plug-in Low Voltage Connections;
• Solid State Microprocessor Design;
• Greatly Decreases Installation Time;
• Substantial Space Savings;
• Line Cord Included, Hard Wire Option;
• Bronze Casing for Open or Closed Systems;
• Replaceable Cartridge Design;
• Maintenance Free, Wet-Rotor Circulators;
• 2 Operation Modes: Outdoor Reset and Setpoint with or without Delta T Limiting;
• Main System Pump Contact;
• 100% Pump Operation / Control Override Switch;
• Automatic Pump Exercise;
• Adjustable Reset Ratio;
• Warm Weather Shutdown;
• Large LCD Display;
• Outdoor and 2 Strap-on Sensors included.

Technical Specifications:

• Flow Range: 0 – 7.5 GPM;
• Head Range: 0 – 15.5 Feet;
• Minimum Fluid Temperature: 32˚F (0˚C);
• Maximum Fluid Temperature: 185°F (85˚C);
• Maximum Working Pressure: 125 psi;
• Connection Sizes: 3/4” NPT (female threaded).