
- Data Brochure
Mixing Expansion Module 440
D 440
06/05
1
Information
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Choose controls
to match
application
2
Application
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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 440 provides a system pump output and a single mixing output for either a variable speed
injection pump or floating action mixing valve. The 440 cannot operate by itself and requires the use of a tN4 System
Control that is capable of operating a Mixing Expansion Module.
Features:
• tN4 Compatible
• Powered Variable Speed Output
• Powered 24 V (ac) Floating Action Output
• Powered System Pump
• CSA C US Certified for use in USA
and Canada
Floating Output:
24 V (ac) 8 VA
Variable / Floating
Meets Class B: Canadian
ICES & FCC Part 15
Made in Canada
Var. Pump Fuse
T2.5 A 250 V
C Com Mix
Opn53Cls
51 52 54 55
Powered Output
2.5 A
56 57 58 59
Variable Speed System
Pump Pump
RR
NN
No power
Mixing Expansion Module 440
Power
System Pump
Mix % Out
Open
Close
tN4
tektra 1000-02
Var. Pump: 115 V (ac) 2.5 A
Relay Rating: 115 V (ac) 5 A
7.5 A (max)
H7009B
1 of 4 © 2005 D 440 - 06/05

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 440.
The 440 operates either a variable speed injection pump
or a floating action mixing valve to maintain the required
water temperature at its Mix Supply sensor.
Variable Speed Injection
A standard wet rotor circulator can be connected to the
Variable Speed output on the control. 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.
Floating Action
A floating action actuator motor can be connected to the
control on the Opn and Cls terminals. The control pulses
the actuator motor open or close 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 as to whether the control is
currently opening or closing the mixing valve is displayed
by the Open and Close LEDs.
System Pump Operation
The System Pump contact operates based on the settings
of the tN4 thermostats connected to the same tN4 bus
as the 440.
DIP Switch Settings
C Com Mix
Opn53Cls
Floating Output:
RR
24 V (ac) 8 VA
51 52 54 55
No power
Powered Output
Mixing Expansion Module 440
Power
2.5 A
56 57 58 59
Variable Speed System
NN
Pump Pump
System Pump
Mix % Out
Open
Close
Variable / Floating
Meets Class B: Canadian
ICES & FCC Part 15
Made in Canada
Var. Pump Fuse
T2.5 A 250 V
The DIP switches are found on the left hand side of the 440.
© 2005 D 440 - 06/05 2 of 4
tN4
tektra 1000-02
Var. Pump: 115 V (ac) 2.5 A
Relay Rating: 115 V (ac) 5 A
7.5 A (max)
H7009B
Variable
• The 440 uses the Variable Speed output to control a
variable speed injection pump.
Floating
• The 440 uses the Floating Action output to control a
24 V (ac) floating action actuator.

LED Status Indicators
Mixing Expansion Module 440
Power
System Pump
Mix % Out
Mix % Out LED
Flashing Green:
• The rate of flashing represents the output of the mixing
device.
Solid Green:
• The mixing output is on 100%.
Off:
• The mixing output is off.
Open
Close
Five LEDs provide the status on the 440’s outputs.
Power LED
Green:
• Normal operation.
Off:
• No power to the Mixing Expansion Module.
System Pump LED
Green:
• The System Pump relay is on.
Off:
• The System Pump relay is off.
Open LED
Green:
• The Open relay is on.
Off:
• The Open relay is off.
Closed LED
Green:
• The Close relay is on.
Off:
• The Close relay is off.
Cleaning the Control
The control’s exterior can be cleaned using a damp cloth. Moisten the cloth with water and wring out prior to wiping the
control. Do not use solvents or cleaning solutions.
3 of 4 © 2005 D 440 - 06/05

Limited Warranty and Product Return Procedure
Limited Warranty The liability of tekmar under this
warranty is limited. The Purchaser, by taking receipt
of any tekmar product (“Product”), acknowledges the
terms of the Limited Warranty in effect at the time of
such Product sale and acknowledges that it has read
and understands same.
The tekmar Limited Warranty to the Purchaser on the
Products sold hereunder is a manufacturer’s passthrough warranty which the Purchaser is authorized to
pass through to its customers. Under the Limited Warranty, each tekmar Product is warranted against defects
in workmanship and materials if the Product is installed
and used in compliance with tekmar’s instructions, ordinary wear and tear excepted. The pass-through warranty
period is for a period of twenty-four (24) months from the
production date if the Product is not installed during that
period, or twelve (12) months from the documented date
of installation if installed within twenty-four (24) months
from the production date.
The liability of tekmar under the Limited Warranty shall
be limited to, at tekmar’s sole discretion: the cost of parts
and labor provided by tekmar to repair defects in materials and / or workmanship of the defective product; or to the
exchange of the defective product for a warranty replacement product; or to the granting of credit limited to the original cost of the defective product, and such repair, exchange
or credit shall be the sole remedy available from tekmar,
and, without limiting the foregoing in any way, tekmar is
not responsible, in contract, tort or strict product liability,
for any other losses, costs, expenses, inconveniences, or
damages, whether direct, indirect, special, secondary, incidental or consequential, arising from ownership or use of
the product, or from defects in workmanship or materials,
including any liability for fundamental breach of contract.
Any representations or warranties about the Products made
by Purchaser to its customers which are different from or in
excess of the tekmar Limited Warranty are the Purchaser’s
sole responsibility and obligation. Purchaser shall indemnify and hold tekmar harmless from and against any and all
claims, liabilities and damages of any kind or nature which
arise out of or are related to any such representations or
warranties by Purchaser to its customers.
The pass-through Limited Warranty does not apply if the
returned Product has been damaged by negligence by persons other than tekmar, accident, fire, Act of God, abuse or
misuse; or has been damaged by modifications, alterations
or attachments made subsequent to purchase which have
not been authorized by tekmar; or if the Product was not
installed in compliance with tekmar’s instructions and / or
the local codes and ordinances; or if due to defective installation of the Product; or if the Product was not used in compliance with tekmar’s instructions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WHICH THE GOVERNING
LAW ALLOWS PARTIES TO CONTRACTUALLY EXCLUDE,
INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURABILITY OR DESCRIPTION OF
THE PRODUCT, ITS NON-INFRINGEMENT OF ANY RELEVANT PATENTS OR TRADEMARKS, AND ITS COMPLIANCE WITH OR NON-VIOLATION OF ANY APPLICABLE
ENVIRONMENTAL, HEALTH OR SAFETY LEGISLATION;
THE TERM OF ANY OTHER WARRANTY NOT HEREBY
CONTRACTUALLY EXCLUDED IS LIMITED SUCH THAT
IT SHALL NOT EXTEND BEYOND TWENTY-FOUR (24)
MONTHS FROM THE PRODUCTION DATE, TO THE
EXTENT THAT SUCH LIMITATION IS ALLOWED BY THE
GOVERNING LAW.
The pass-through Limited Warranty applies only to those
defective Products returned to tekmar during the warranty
period. This Limited Warranty does not cover the cost of the
parts or labor to remove or transport the defective Product,
or to reinstall the repaired or replacement Product, all such
costs and expenses being subject to Purchaser’s agreement and warranty with its customers.
tekmar Control Systems Ltd., Canada
tekmar Control Systems, Inc., U.S.A.
Head Office: 5100 Silver Star Road
Vernon, B.C. Canada V1B 3K4
(250) 545-7749 Fax. (250) 545-0650
Web Site: www.tekmarcontrols.com
Product design, software and literature are Copyright © 2005 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
4 of 4
Product Warranty Return Procedure All Products that
are believed to have defects in workmanship or materials
must be returned, together with a written description of the
defect, to the tekmar Representative assigned to the territory in which such Product is located. If tekmar receives an
inquiry from someone other than a tekmar Representative,
including an inquiry from Purchaser (if not a tekmar Representative) or Purchaser’s customers, regarding a potential
warranty claim, tekmar’s sole obligation shall be to provide
the address and other contact information regarding the
appropriate Representative.
All specifications are subject to change without notice.
Printed in Canada. D 440 - 06/05.