tekmar 444 User Manual
- Data Brochure
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Mixing Expansion Module 444
D 444
04/07
1
Information
Brochure
Choose controls
to match
application
2
Application
Brochure
Design your
mechanical
applications
3
Rough In
Rough-in
instructions
Wiring
wiring
4
Wiring
Brochure
Wiring and
installation of
specific control
5
Data
Brochure
Control settings
and sequence of
operation
6
Job
Record
Record settings &
wiring details for
future reference
Introduction
The Mixing Expansion Module 444 provides six options for operating a variable speed injection pump, a floating action
actuator, or an analog 0-10 V (dc), 2-10 V (dc), 0-20 mA, or 4-20 mA signal. The 444 also provides an output for a system
pump. The 444 cannot operate alone and requires the use of a tN4 System Control that is capable of operating a Mixing
Expansion Module.
Features
• Requires a tN4 System Control
• Powered Variable Speed Injection Pump
• Powered 24 V (ac) Floating Action Output
• Analog 0-20 mA or 4-20 mA
• Analog 0-10 V (dc) or 2-10 V (dc)
• Powered 120 V (ac) System Pump
• Powered 24 V (ac) System Pump Signal
• CSA C US Certified for use in USA and Canada
Power
tN4
System Pump
Mix % Out
For product instructions,
see brochure.
Mixing Expansion Module 444
Variable Speed / Floating Action /
Modulating
1 of 4 © 2007 D 444 - 04/07
Table of Contents
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Sequence of Operation ...................................................2
System Pump Operation ................................................3
DIP Switch Settings ........................................................3
LED Status Indicators .....................................................3
Sequence of Operation
The tN4 System Control determines the required mix
supply water temperature based on its settings and the
requirements of the tN4 thermostats connected to the same
tN4 bus as the 444.
The 444 operates a mixing device to maintain the required
water temperature at its Mix Supply sensor. A mixing device
can include:
• Variable speed injection pump.
• Floating action actuated mixing valve.
• Analog signal actuated mixing valve.
• Analog signal to variable frequency drive (VFD) operated
pump.
• Analog signal to modulating steam to hot water valve.
Variable Speed Injection
A standard wet rotor circulator can be connected to the
variable speed output on the back of the module. The control
increases or decreases the power output to the circulator
when there is a requirement for mixing. The circulator
speed varies to maintain the correct mixed supply water
temperature at the mix supply sensor. For correct sizing
and piping of the variable speed injection circulator, refer
to essay E 021.
A visual indication of the current variable speed output is
displayed by the Mix % Out LED bar graph.
Test
Reset
Module
Zone
Manager
tN4 Mix Bus
444
Cleaning the Module ......................................................4
Error Messages ..............................................................4
Warranty .........................................................................4
Floating Action
A floating action actuator motor can be connected to the
control on the Opn and Cls terminals. The module pulses
the actuator motor with 24 V (ac) to open or close the valve
in order to maintain the correct supply water temperature
at the mix supply sensor when there is a requirement for
mixing. The mixing valve that the actuator is connected to
can be either a 2-way, 3-way or 4-way valve.
A visual indication of the current variable speed output is
displayed by the Mix % Out LED bar graph.
Test
Reset
Module
Zone
Manager
tN4 Mix Bus
Mix System
Pump
444
Analog Signal
An analog 0-10 V (dc), 2-10 V (dc), 0-20 mA, or 4-20 mA
signal can be provided by the modulating output on the
control. The analog signal can be used to operate a
modulating mixing valve, a modulating steam to hot water
valve, or a variable frequency drive (VFD) which in turn
operates a pump.
A visual indication of the analog output is displayed by the
Mix % Out LED bar graph.
Variable Speed
Injection Pump
© 2007 D 444 - 04/07 2 of 4
Mix System
Pump
Test
Reset
Module
Zone
Manager
Variable Speed
Injection Pump
tN4 Mix Bus
VFD
Mix System
444
Pump
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