Overview of Primary Product

• 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
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
Submittal Data # 101-095
Supersedes: New
Effective: 02/01/04
Application
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.
Operation
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 require-
ments between manifolds.
No special piping, just 4 connections and your installation is complete.
Performance Field
Taco Inc., 1160 Cranston Street, Cranston, RI 02920 / [phone] / Fax [phone]
Taco (Canada) Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3 / [phone] / Fax [phone]
www.taco-hvac.com
HYDRONIC COMPONENTS & SYSTEMS
Submittal Data Information
Radiant Mixing Block
Fig. A
A B
C
D
Model Volts Hz Ph Amps RPM HP
Electrical & Weight Data
Ship Wt.
lbs. Kg
Permanent Split Capacitor
Impedance Protected
RMB-1
Motor
Type
120 60 1
2 3250 1/40 & 1/25 18.5
8.4
Features
Performance Data