3
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.
Application
SYSTEM PUMP CURVE
INJECTION PUMP CURVE
REQUIRED INJECTION PUMP FLOW RATE
Tb
= Boiler Supply Temperature
Ts
= Radiant Supply Temperature
Injection Flow Rate (GPM) =
BTU’s
(Tb - Ts) x 500
BTU’s x 1,000
Tb - Ts
20
40
60
80
100
120
100
0.4
0.8
1.2
1.6
2.0
2.4
80
0.5
1.0
1.5
2.0
2.5
3.0
60
0.7
1.3
2.0
2.7
3.3
4.0
40
1.0
2.0
3.0
4.0
5.0
20
2.0
4.0
Required Injection Flow Rate (GPM)
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. 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.
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
Getting Ready
0
5
10
15
FLOW (gpm)
H
E
A
D
(
ft)
0
2
4
6
8
10
12
14
16
18
0
5
10
15
FLOW (gpm)
H
E
A
D
(
ft)
0
2
4
6
8
10
12
14
16
18
Summary of Contents for Radiant Mixing Block
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