Install Instructions

ManualsBrandsTaco ManualsHeating SuppliesRadiant Mixing Block

SUPERSEDES: 2FWREHU 1, 2010

EFFECTIVE: -XQH

WARNING SYMBOL: THIS SYMBOL INDICATES THE PRESENCE OF HAZARDS WHICH

CAN CAUSE SEVERE PERSONAL INJURY, SUBSTANTIAL PROPERTY DAMAGE OR

EVEN DEATH IF IGNORED.

The Taco Radiant Mixing Block



(RMB) represents a breakthrough in the design, control and installation of radiant systems. The

patentHG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.

Instruction Sheet

RMB - Radiant Mixing Block

102-151

General

TEM

ENU

RADIANT

ING

BLOCK

TENT

PENDI

B-1

Table of Contents

TYPICAL PIPING ------------------------------------------------ 2

GETTING READY ------------------------------------------------ 3

APPLICATION ---------------------------------------------------- 3

DESIGN PROCEDURE ----------------------------------------- 3

INSTALLATION OF RADIANT MIXING BLOCK -------- 4

OUTDOOR RESET MODE ------------------------------------ 5

OUTDOOR RESET SETTINGS ------------------------------ 5

SETPOINT AND DELTA T MODE --------------------------- 6

SETPOINT AND DELTA T SETTINGS --------------------- 7

BOILER OPERATION MODE --------------------------------- 7

SET UP OF RADIANT MIXING CONTROL --------------- 8

DISPLAY OPERATION ---------------------------------------- 11

TROUBLE SHOOTING ---------------------------------------- 13

ERROR MESSAGES ------------------------------------------- 14

REPLACING CARTRIDGE ASSEMBLY ------------------ 14

REPLACING THE CHECK VALVE ------------------------- 15

TECHNICAL DATA --------------------------------------------- 15

CLEANING -------------------------------------------------------- 16

LIMITED WARRANTY STATEMENT ---------------------- 16

Plant ID#: 001-3807

RADIANT MIXING BLOCK



(RMB)

RADIANT MIXING CONTROL

Taco resource – saving product



UPERSEDES: June 1, 2015

EFFECTIVE: July 30, 2015

U.S.Patent #7,048,200

TYPICAL PIPING

GETTING READY

APPLICATION

DESIGN PROCEDURE

INSTALLATION OF RADIANT MIXING BLOCK

OUTDOOR RESET MODE

OUTDOOR RESET SETTINGS

SETPOINT AND DELTA T MODE

SETPOINT AND DELTA T SETTINGS

BOILER OPERATION MODE

SET UP OF RADIANT MIXING CONTROL

DISPLAY OPERATION

TROUBLE SHOOTING

ERROR MESSAGES

TECHNICAL DATA

CLEANING

REPLACING CARTRIDGE ASSEMBLY

REPLACING THE CHECK VALVE

REPLACEMENT PARTS LIST

LIMITED WARRANTY STATEMENT

Summary of content (16 pages)

PAGE 1
, 2015 SUPERSEDES: SUPERSEDES: June 2FWREHU 1, 2010 Plant ID#: 001-3807 General Instruction Sheet 102-151 RMB - Radiant Mixing Block EFFECTIVE: July 30, 2015 EFFECTIVE: -XQH WARNING SYMBOL: THIS SYMBOL INDICATES THE PRESENCE OF HAZARDS WHICH CAN CAUSE SEVERE PERSONAL INJURY, SUBSTANTIAL PROPERTY DAMAGE OR EVEN DEATH IF IGNORED. The Taco Radiant Mixing Block (RMB) represents a breakthrough in the design, control and installation of radiant systems.
PAGE 2
Typical Piping
PAGE 3
Getting Ready Ensure that the contents of this package are complete. If any of the contents are missing or damaged, please contact your local Taco sales representative for assistance.
PAGE 4
Installation of the Radiant Mixing Block STEP ONE MOUNTING STEP TWO PIPING CONNECTIONS STEP THREE FILLING STEP FOUR REPLACING THE FRONT COVER STEP FIVE ELECTRICAL CONNECTIONS 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 of Operation In order to properly control a hot water heating system, the amount of heat supplied to the building must equal the amount of heat lost by the building. The amount of heat delivered into a building depends on the temperature of the water in the heating unit and the surface area of the heating unit. Heating units with a small surface area, such as baseboard radiators, require a higher water temperature than heating units with a larger surface area such as radiant floors.
PAGE 6
Outdoor Reset Design Supply The Design Supply temperature is the supply water temperature that is required to heat the building when the outdoor air temperature is as cold as the Outdoor Design temperature. Mix Maximum Maximum System Supply Some systems, such as hydronic radiant floor heating, may require the maximum supply water temperature to be limited in order to protect certain system components from high temperatures.
PAGE 7
Unpowered Demand The RMC recognizes an Unpowered Demand signal when a switch is closed between 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. The system pump as well as an external boiler pump may be controlled by this relay. By providing proper flow in the boiler loop, the boiler temperature can be accurately controlled based on the mixing load.
PAGE 8
water temperature rises 1/2 of the differential above the required boiler supply temperature. If the differential is too wide, there can be large supply water temperature swings; however, if the differential is too narrow, the boiler short cycles and operates inefficiently. This control automatically calculates the boiler differential in order to achieve an appropriate balance between temperature swings and boiler efficiency. This also permits the control to adapt to changing loads and conditions.
PAGE 9
STEP TWO - (continued) Installing the System and Boiler Sensors Note: These sensor are designed to be mounted on a pipe or in a temperature well. • These sensors can be strapped directly to the pipe using the cable tie provided with the sensors. Insulation should be installed around the sensors to reduce the effect of air currents on the temperature measurement. Care should be taken not to over-tighten the cable tie as this can cause damage to the sensor.
PAGE 10
Wiring the External Boiler Pump (Optional) Using a 3/16 inch female spade connector, connect the hot side of the boiler pump circuit to the male spade connector labelled “Pmp” located on the back of the RMC circuit board. Connect the neutral side of the boiler pump circuit to the neutral (N) side of the RMB’s input power supply. When using this option the line cord should be removed and the RMB hard wired.
PAGE 11
Mixing Return Temperature 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. Mixing Target Temperature The mixing target temperature is displayed when the MIX TARG elements are turned on. This is the temperature the RMC is currently trying to maintain at the supply sensor.
PAGE 12
Boiler Minimum Temperature 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. ADJUST BOIL F MIN Warm Weather Shut Down (WWSD) The warm weather shut down is the outdoor temperature at which the system is shut down.
PAGE 13
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. If a digital thermometer is not available, place a second sensor next to the original sensor and compare the readings.
PAGE 14
Mixing Supply Sensor Short Circuit A short circuit has been detected in the mixing supply sensor. The control continues to operate the injection pump at a low speed (17 - 18%) as long as a demand is present. To clear this error message, correct the short circuit and press any button on the control. VIEW MIX SUP ! 1 Mixing Supply Sensor Open Circuit An open circuit has been detected in the mixing supply sensor.
PAGE 15
DIMENSIONS & WEIGHT Model: RMB-1 Ship Weight: 18.5 lbs (8.4 kg) Cleaning The exterior of the control can be cleaned using a damp cloth. Do not use any solvents. Moisten the cloth and wring out any excess water before cleaning the control. Replacing Cartridge Assembly 1. Disconnect the electrical supply. 2. Reduce system pressure to 0 psi and allow system to return to room temperature. Isolate the RMB by closing the service valves or draining the system. 3.
PAGE 16
Replacement Parts Breakdown IMC A AIR VENT 8. 11. CONNECTION FROM 008 MOTOR INSTALL ADDITIONAL QUICK DISCONNECT CONNECTION FROM LINE (BLACK) LINE & NEUTRAL CONNECTIONS 9. or 10. CONNECTION FROM NEUTRAL ( WHITE) GROUND CONNECTION CONNECTION FROM 006 MOTOR IF C 1. GROUND SCREW IMC 6. 7. 4. 5. BACK COVER ASSEMBLY CASING COVE R Replacement Parts 1. Control Board 2. Outdoor Sensor 3. Strap-On Sensor 4. Top Injection Pump Cartridge 5. Bottom System Pump Cartridge 6.