Getting Ready; Application; Design Procedure - Taco Radiant Mixing Block Instruction Sheet

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.
Contents should include the following:
• One Radiant Mixing Block, unit consists of the following parts:
• One Radiant Mixing Control
• One Green Enclosure
• One Casing with two circulators attached
• One Backplate
• One Power Cord (6 feet, attached to backplate)
• One Taco Outdoor Sensor
• Two Taco Strap-on Sensors
• One Instruction Sheet

Application

The Taco Radiant Mixing Block
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. The RMB can be set up to operate as an
outdoor reset control, a setpoint control or a delta 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.
2. Using the table or equation below, determine the required flow rate for the Injection Pump.
3. Using the pump curve located below, ensure that the Injection Pump of the Radiant Mixing Block will provide adequate flow for the
system in which it is to be installed.
SYSTEM PUMP CURVE
18
16
14
12
10
8
6
4
2
0
0 5
REQUIRED INJECTION PUMP FLOW RATE
Tb = Boiler Supply Temperature
Ts = Radiant Supply Temperature
Injection Flow Rate (GPM) =
(RMB) is a complete injection mixing system.
10 15
FLOW (gpm)
Tb - Ts
BTU's
(Tb - Ts) x 500
18
16
14
12
10
8
6
4
2
0
0
Required Injection Flow Rate (GPM)
20 40
100 0.4 0.8
80 0.5 1.0
60 0.7 1.3
40 1.0 2.0
20 2.0 4.0
Integral to the unit is a variable speed
INJECTION PUMP CURVE
5 10
FLOW (gpm)
BTU's x 1,000
60 80 100
1.2 1.6 2.0
1.5 2.0 2.5
2.0 2.7 3.3
3.0 4.0 5.0
15
120
2.4
3.0
4.0
3