Submittal Sheet

Job __________________________
Designer ______________________
Contact _______________________
www.tekmarcontrols.com  of 2 © 20 C 444 - 0/
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0/
HVAC Systems Replaces: New
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The Mixing Expansion Module 444 is designed to operate a mixing device within a hydronic heating system as part of a tekmarNet
®
control system. It is capable of controlling a mixed system pump and six optional outputs for mixing: a variable speed injection pump,
a floating action actuator, or an analog 0-0 V (dc), 2-0 V (dc), 0-20 mA, or 4-20 mA signal.

Requires tekmarNet
®
system control with a mix bus (422 or 423). Designed for use with tekmarNet
®
thermostats.
 --------------------------
Requires a tekmarNet
®
4 system control
Powered variable speed injection pump
Powered 24 V (ac) floating action output
Analog 0-20 mA or 4-20 mA
Analog 0-0 V (dc) or 2-0 V (dc)
Powered 20 V (ac) system pump
Powered 24 V (ac) system pump signal
CSA C US certified for use in USA and
Canada
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 -----------------------------------------------------
Variable Speed / Floating Action / Modulating
Literature D444, W444, J444, D00, D070
Control Microprocessor control. This is not a safety (limit) control
Packaged weight . lb. (500 g)
Dimensions 4-3/4” H x 2-7/8” W x -7/8” D (20 x 74 x 48 mm)
Enclosure W hite PVC plastic
Approvals CSA C US, meets Class B: ICES & FCC Part 5
Ambient conditions
Indoor use only, 32 to 04°F (0 to 40°C), RH ≤92% to 04°F
(40°C), and 50% above 04°F (40°C), Altitude <9840 ft.
(3000 m), Pollution Degree 2
Power supply 24 V (ac) ±0%, 50/60 Hz, 4 VA standby, 56 VA fully loaded
System pump relay
(front)
24 V (ac) 2A
System pump relay
(back)
20 V (ac) 5A, /6 hp
Variable speed pump 20 V (ac) 2.4 A, internal overload circuit T2.5 A 250 V
Floating output 24 V (ac) 8 VA maximum, triac output, minimum 0.6 VA
Modulation output
(voltage)
0-0V / 2-0 V (dc), minimum 0kΩ load
Modulation output
(current)
0-20 mA / 4-20 mA, maximum kΩ load
Sensors NTC thermistor, 0 kΩ @ 77°F (25°C ±0.2°C) ß=3892
–Included Universal Sensor 082
Warranty Limited 3 Year (See D444 for full warranty)
Front View
Mixing Expansion Module 444
Variable Speed / Floating Action /
Modulating
Mix % Out
tN4
Power
System Pump
For product instructions,
see brochure.
2–7/8”
(74 mm)
4–3/4”
(120 mm)
Side View
7/8”
(22 mm)
Back View
Black Red Blue Green
6/8”
(18 mm)