12906 1 Taco 193 004Rp Brochure TAC 5698_RadiantMixingBlock_100 25 User Manual

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Water Circulation
Pumps & Circulators

Radiant Mixing Block
The Taco Radiant Mixing Block represents a breakthrough in the design, control and installation of radiant
systems. The patent pending design combines a variable speed injection mixing control, injection circulator,
system circulator, and air elimination into a single unit. Extremely versatile, the Radiant Mixing Block can be set
up as an outdoor reset control, a setpoint control or a delta T limiting control. All this with no special piping, no
balancing valve, no closely spaced tees, no external controls, no complex wiring; just four pipe connections and
your installation is complete. Welcome to the new age of Radiant!

Manifold Ready

Taco Catalog # 100-25
Supersedes: New

Effective: 02/01/04
Printed in the USA

Submittal Data # 101-095
Supersedes: New

Submittal Data Information
Radiant Mixing Block
Features

Effective: 02/01/04

Application

• All-in-One Injection Piping, Pumping, Air
Elimination, & Control Package
• 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
• Powered or Unpowered Demand Signal
• Integral Check Valve
• Main System Pump Contact
• 100% Pump Operation / Control Override
Switch
• Automatic Pump Exercise
• Adjustable Reset Ratio
• Warm Weather Shutdown
• Boiler Control or Enable Setting
• Boiler Protection
• Large LCD Display
• C° or F°
• Outdoor and 2 Strap-on Sensors included

The Taco Radiant Mixing Block (RMB) is a complete injection mixing system. Integral to the unit is a
variable speed injection circulator, constant speed system circulator, air elimination, and the electronics
to drive it all. With only four piping connections needed, the RMB greatly reduces the time and space
required for installation (see Fig. A). The RMB can be set up to operate as an outdoor reset control or
a setpoint control with or without delta T limiting, creating flexibility never seen before in a single unit.
Fig. A

Operation
A

B

C

D

Hot water from the boiler loop enters the RMB at the Boiler Supply port (A).
The cooler return water from the radiant loops enters at the System Return
port (B). In the middle of these two ports, any air in the system is purged
through the integral Taco Hy-Vent. The injection circulator varies in speed to
blend the two temperatures, injecting the excess required temperature back
through the Boiler Return port (C). The constant speed system circulator
delivers the required blended water temperature to the radiant loop through
the Radiant Supply port (D).

Sizing and Piping

The Radiant Mixing Block can handle radiant load demands of up to 120,000 BTU’s. Your current method
of zoning the radiant loops (manifolds, zone valves, etc.) does not change with the installation of the
RMB. Multiple Radiant Mixing Blocks can be used to separate the distinctive temperature requirements between manifolds. No special piping, just 4 connections and your installation is complete.

Performance Data
Flow Range: 0 – 15.5 GPM
Head Range: 0 – 15 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
FOR INDOOR USE ONLY

Performance Field

Electrical & Weight Data
Model Volts Hz Ph Amps RPM
RMB-1

120

60

1

2

HP

Ship Wt.
lbs. Kg

3250 1/40 & 1/25 18.5

8.4

Motor Permanent Split Capacitor Impedance Protected
Type

H YDRONIC C OMPONENTS & S YSTEMS

Taco Inc., 1160 Cranston Street, Cranston, RI 02920 / (401) 942-8000 / Fax (401) 942-2360
Taco (Canada) Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3 / (905) 564-9422 / Fax (905) 564-9436
www.taco-hvac.com
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