Submittal Sheet

Job __________________________
Designer ______________________
Contact _______________________
www.tekmarcontrols.com  of 2 © 20 C 403 - 0/
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HVAC Systems Replaces: New
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Outdoor Temperature Reset
Indoor Temperature Feedback up to
48 zones
Warm Weather Shut Down
Zone Synchronization
DHW Post Purge
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Expandable up to 48 zones
Single on/off, two stage, or modulating
boiler control
Variable speed, floating action, or
proportional mixing control
DHW control
DHW Priority
Automatic Boiler Differential
Equipment Exercising
Boiler Protection
Powered pump outputs
System Setback (with optional Timer)
One touch overrides (with optional
User Switch)
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The tekmarNet
®
2 House Control 403 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 fan coils, mixed radiant floor heating zones, and a modulating/condensing boiler. This control regulates
up to two heating water temperatures through Outdoor Reset and Indoor Temperature Feedback. It is capable of controlling a single
on/off, dual stage, or modulating boiler, a mixing device, Domestic Hot Water, setpoint loads, 4 on-board zone pumps, and can connect
up to 24 zones in total for each space heating water temperature.
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This control is designed to be used with a tekmarNet
®
Zone or Power Manager and thermostats. Mounting enclosure provided with
zone manager.
Menu
House Control 403
Item
+
Mix ComBoil Out DHWCom
Zone 1
H8008A
Zone 2 Zone 3 Zone 4
tN2 tN2 tN2 tN2 tN2 tN2 tN2 tN2 C
Floating Action
ClsOpn
Sensors - No Power
Call Call
tN4 tN4C C
Mod dc/mA
Boil Exp. Mix Exp.
Setpoint DHW
RC
Input Power
Made in Canada
Use at least 167°F
(75°C) conductors
Stage 2Stage 1
Front View Side View Back View
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). For systems
that require 2 power sources of 115 V (ac),
a box extension ring is required to increase
box fill capacity.
Strip wires 1/2 inch (13 mm). Installed wires are not removable. 12-18 AWG
Boil Sys Pmp DHW Pump
Variable Speed Pump
Pump Power
Zone 4
Zone 3 Zone 2 Zone 1
Zone Power
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)
2–1/4”
(57 mm)
4–1/2” (114 mm)
Boiler, DHW & Setpoint, Mixing,Four Zone Pumps
Literature D403, Q403, SB057
Control Microprocessor control. This is not a safety (limit) control.
Packaged weight .4 lbs (640 g)
Dimensions 5.5” H x 5.5” W x 2.25” D (40 x 40 x 57 mm)
Enclosure NEMA  rated, blue PC+ABS 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
90% Non-
condensing
Power supply 24 V (ac) ±0% 60 Hz, 00 VA max, Class 2
Control load 2 VA
Floating action load 89 VA, 24 V (ac), 3.7 A
Boiler stage , 2 relays
24 V (ac) 5 A
Boiler system pump relay 5 V (ac) 5 A, /6 hp
Zone  to 4 pump relays 5 V (ac) 5 A, /6 hp
DHW pump relay 5 V (ac) 5 A, /6 hp
Variable speed pump relay 5 V (ac) 2.4 A
Pump power 5 V (ac) 2 A max
Setpoint and DHW calls Short, 0 - 32 V (ac)
Boil/Mix modulating output
0 - 0 V (dc) 500 Ω min load impedance, 4 - 20 mA  kΩ max
load impedance
Sensors
NTC thermistor, 0k
@ 77°F (25°C ± 0.2°C) ß=3892
- Included Outdoor Sensor 070 and 2 of Universal Sensors 082
Warranty Limited 3 Year (see D403 for full warranty)