Taco Radiant Mixing Block Instruction Sheet
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Taco Radiant Mixing Block Instruction Sheet

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SUPERSEDES: June 1, 2015
SUPERSEDES:
Plant ID#: 001-3807
General
The Taco Radiant Mixing Block (RMB) represents a breakthrough in the design, control and installation of radiant systems. The
patent
design combines a variable speed injection mixing control (RMC), injection circulator, system circulator, and air elimination
into a single unit. Extremely versatile, the Radiant Mixing Block can be set up to operate as an outdoor reset control, a setpoint
control or a delta T limiting control.
RADIANT MIXING BLOCK (RMB)

Table of Contents

TYPICAL PIPING
GETTING READY
TYPICAL PIPING ------------------------------------------------ 2
APPLICATION
GETTING READY ------------------------------------------------ 3
DESIGN PROCEDURE
APPLICATION ---------------------------------------------------- 3
INSTALLATION OF RADIANT MIXING BLOCK
DESIGN PROCEDURE ----------------------------------------- 3
OUTDOOR RESET MODE
OUTDOOR RESET SETTINGS
OUTDOOR RESET MODE ------------------------------------ 5
SETPOINT AND DELTA T MODE
OUTDOOR RESET SETTINGS ------------------------------ 5
SETPOINT AND DELTA T SETTINGS
SETPOINT AND DELTA T MODE --------------------------- 6
BOILER OPERATION MODE
SETPOINT AND DELTA T SETTINGS --------------------- 7
BOILER OPERATION MODE --------------------------------- 7
Instruction Sheet
RMB - Radiant Mixing Block
1, 2010
WARNING SYMBOL: THIS SYMBOL INDICATES THE PRESENCE OF HAZARDS WHICH
CAN CAUSE SEVERE PERSONAL INJURY, SUBSTANTIAL PROPERTY DAMAGE OR
EVEN DEATH IF IGNORED.
2
SET UP OF RADIANT MIXING CONTROL
3
DISPLAY OPERATION
3
TROUBLE SHOOTING
DISPLAY OPERATION ---------------------------------------- 11
3
ERROR MESSAGES
TROUBLE SHOOTING ---------------------------------------- 13
4
TECHNICAL DATA
ERROR MESSAGES ------------------------------------------- 14
5
CLEANING
REPLACING CARTRIDGE ASSEMBLY ------------------ 14
5
REPLACING CARTRIDGE ASSEMBLY
REPLACING THE CHECK VALVE ------------------------- 15
6
REPLACING THE CHECK VALVE
TECHNICAL DATA --------------------------------------------- 15
7
REPLACEMENT PARTS LIST
CLEANING -------------------------------------------------------- 16
7
LIMITED WARRANTY STATEMENT
LIMITED WARRANTY STATEMENT ---------------------- 16
EFFECTIVE: July 30, 2015
EFFECTIVE:
U.S.Patent #7,048,200
RADIANT MIXING CONTROL
A Taco resource - saving product
102-151
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Summary of Contents for Taco Radiant Mixing Block

  • Page 1: Table Of Contents

    (RMC), injection circulator, system circulator, and air elimination into a single unit. Extremely versatile, the Radiant Mixing Block can be set up to operate as an outdoor reset control, a setpoint control or a delta T limiting control.

  • Page 2: Typical Piping

    Typical Piping Outdoor Outdoor Sensor Sensor Radiant Manifold - Return Supply oiler Supply oiler Sensor Sensor Sensor Sensor Radiant Manifold - Supply RM - Radiant Mixing lock RM - Radiant Mixing lock Outdoor Outdoor Sensor Sensor Supply Supply oiler oiler Sensor Sensor Sensor...

  • Page 3: Getting Ready

    T limiting control, creating flexibility never seen before in a single unit. Design Procedure 1. Using the pump curve located below, ensure that the System Pump of the Radiant Mixing Block will provide adequate flow for the system in which it is to be installed.

  • Page 4: Installation Of Radiant Mixing Block

    STEP ONE MOUNTING 1. Mounting position – The Radiant Mixing Block must be mounted in the vertical position with the automatic air vent located at the top of the Radiant Mixing Block. 2. To mount the Radiant Mixing Block begin by removing the Radiant Mixing Control from the front of the Radiant Mixing Block.

  • Page 5: Outdoor Reset Mode

    Outdoor Reset. When a Taco Outdoor Sensor is connected to the Radiant Mixing Control (RMC), the RMC provides outdoor reset. When operating in the outdoor reset mode of operation, the installer must set the Outdoor Design Temperature and the Design Supply Temperature in order to establish the relationship between the outdoor temperature and the supply water temperature.

  • Page 6: Setpoint And Delta T Mode

    Outdoor Design The Outdoor Design temperature is the average coldest day of the Outdoor Reset year for the area in which the building is located. Design Supply The Design Supply temperature is the supply water temperature that is required to heat the building when the outdoor air temperature is Mix Maximum as cold as the Outdoor Design temperature.

  • Page 7: Setpoint And Delta T Settings

    Unpowered Demand Boil Out Com Heat Unpowered The RMC recognizes an Unpowered Demand signal when a switch is closed between Demand the Com and Heat Dem terminals. SYSTEM PUMP OPERATION The RMC has an internal system pump contact. This contact turns on when the RMC has a mixing demand.

  • Page 8: Set Up Of Radiant Mixing Control

    If the Radiant Mixing Block is to be used in the outdoor reset mode, the Outdoor Sensor must be installed. If the Radiant Mixing Block is to be used in either the setpoint or a delta T mode, the Outdoor sensor is not required and does not need to be installed. (See pages 5 to 7 for a complete description of the available modes.)
  • Page 9 (ac) 5 A, 1/6 hp Wiring to the Injection Pump Connect the variable speed injection pump’s three pin molex connector from the Radiant Mixing Block to the matching three pin molex connector labelled “Var” on the back of the RMC circuit board. Use copper...

  • Page 10: Display Operation

    • Place the RMC into the Radiant Mixing Block’s plastic enclosure. • Insert the screw into the hole located on the face of the RMC and tighten the screw to fasten the RMC to the Radiant Mixing Block Enclosure. Do not overtighten.
  • Page 11 Mixing Return Temperature VIEW The mixing return temperature is displayed when the MIX RET elements are turned on. This is the current temperature at the mixing return sensor. The mixing return temperature is only displayed if the Outdoor Design temperature is turned OFF and a mixing return sensor is installed.

  • Page 12: Trouble Shooting

    Boiler Minimum Temperature ADJUST BOIL The boiler minimum temperature item should be set to the lowest water temperature at which the boiler can operate without causing the boiler flue gases to condense. Consult the boiler manufacturer for recommended minimum boiler supply temperatures. This item is only available if a boiler sensor is connected to the control.

  • Page 13: Error Messages

    TESTING THE SENSORS Do not apply voltage to the sensor or to the sensor input of the control as this will result in damage to either the sensor, the control, or both the sensor and the control. A quality testing meter capable of measuring up to 2,000,000 ohms and a good quality digital thermometer are required to test the sensors.
  • Page 14 - NTC thermistor, 10 kohm @ 77°F (25C +/- 0.2°C) B=3892 Included - Taco Outdoor Sensor and 2 Taco Strap-on Sensors The installer must ensure that this control and its wiring are isolated and/or shielded from strong sources of electromagnetic noise.

  • Page 15: Replacing Cartridge Assembly

    Replacing the Check Valve 1. Disconnect the electrical supply. 2. Reduce system pressure to 0 psi and allow system to return to room temperature. Isolate the Radiant Mixing Block by closing the service valves or draining the system. 3. Remove the Boiler Supply connection to the Radiant Mixing Block.

  • Page 16: Limited Warranty Statement

    OTHER WARRANTIES, EXPRESS OR STATUTORY, option) any Taco 00 Series circulator cartridge that is for use with a Taco product or part, or for any application OR ANY OTHER WARRANTY OBLIGATION ON THE proven defective under normal use within three (3) years restrictions, consult the applicable Taco instruction PART OF TACO.

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