Submittal Sheet

Job __________________________
Designer ______________________
Contact _______________________
www.tekmarcontrols.com  of 2 © 20 C 40 - 0/
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HVAC Systems Replaces: New
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The tekmarNet
®
2 House Control 40 is designed to operate all of the mechanical equipment in a residential hydronic heating system,
coordinating their operation through network communication. It can be used in applications ranging from a single zone of baseboard
with an on/off boiler, to multiple radiant floor zones with a modulating/condensing boiler. This control regulates one space heating
water temperature through Outdoor Reset and Indoor Temperature Feedback. It is capable of controlling a single on/off, dual stage,
or modulating boiler, Domestic Hot Water, setpoint loads, 4 on-board zone pumps, and can connect up to 24 zones in total.

This control is designed to mount on a 4” x 4” Electrical box, and must be used with tekmarNet
®
thermostats for communicated heat
demands.
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Outdoor Temperature Reset
Indoor Temperature Feedback up to
24 zones
Warm Weather Shut Down
Zone Synchronization
DHW Post Purge
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Expandable up to 24 zones
Single on/off, two stage, or modulating
boiler control
DHW control
DHW Priority
Automatic Boiler Differential
Pump Exercising
Boiler Protection
Powered pump outputs
System Setback (with optional Timer)
One touch overrides (with optional
User Switch)
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5–1/2”
(140 mm)
5–1/2”
(140 mm)
1–1/8” (30 mm)
7/8”
(22 mm)
CL
1/2” Knock-out (x 4)
Control designed to mount on 4” x 4” electrical
box (not included). Electrical box shown
comes with tekmar 009K
2–1/4”
(57 mm)
4–1/2” (114 mm)
Front View Side View
Back View
Menu
House Control 401
Item
+
ComBoil Out DHWCom
Zone 1
H8006B
Zone 2 Zone 3 Zone 4
tN2 tN2 tN2 tN2 tN2 tN2 tN2 tN2
Sensors - No Power
Call Call
tN4 C
Mod dc/mA Boil Exp.
Setpoint DHW
R
C
Input Power
Made in Canada
Use at least 167°F
(75°C) conductors
Stage 2Stage 1
401
Zone 4
Zone 3 Zone 2
Zone 1
DHW Pump
Pump Power
Strip wires 1/2 inch (13 mm). Installed
wires are not removable.
12-18 AWG
Ø 1/8” (3 mm)
7/8” x 1/2” (23 mm x 12 mm)
Knock-out (x 4)
1/2” x 5/8”
(12 mm x 16 mm)
Knock-out (x 4)
Four Zone Pumps
Literature D40, Q40, SB057
Control Microprocessor control. This is not a safety (limit) control
Packaged weight .4 lb (640 g)
Dimensions 5.5” H x 5.5” W x 2.25” D (40 x 40 x 57 mm)
Enclosure Blue PC+ABS plastic, NEMA type 
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 ≤90% Non-
condensing
Power supply 24 V (ac) ±0%, 60 Hz, 00 VA max, Class 2
Control load 2 VA
Zone pump relays 5 V (ac) 5 A, /6 hp
Boiler stage , 2
relays
24 V (ac) 5 A
DHW pump relay 5 V (ac) 5 A, /6 hp
Pump power 5 V (ac) 2 A max
Setpoint and DHW
calls
Short, 0 - 32 V (ac)
Boiler modulation
output
0 - 0 V (dc) 500 Ω min load impedance, 4 - 20 mA  kΩ max
load impedance
Sensors NTC thermistor, 0 kΩ @ 77°F (25°C ±0.2°C) ß=3892
–Included Outdoor Sensor 070 and Universal Sensor 082
Warranty Limited 3 Year (See D40 for full warranty)