tN2 House Control 403 - Boiler, DHW & Setpoint, Mixing, Four Zone Pumps

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 Temperature Reset and Indoor Temperature Feedback. It is capable of controlling a single on/off, two stage, or modulating boiler, a mixing device, Domestic Hot Water, setpoint loads, 4 on-board zone pumps, and can expand up to 24 zones in total for each space heating water temperature.

Note: There are multiple products which the 403 can replace depending on the application. Some conditions apply; please contact Customer Service for more information.

Features & Specs

Features (definitions)

• Automatic Boiler Differential

• Boiler Protection

• DHW Post Purge

• DHW Priority (optional)

• DHW control

• Exercising

• Expandable up to 48 zones

• For use with tekmarNet^®2 thermostats ONLY

• Four 115 V (ac) powered zone outputs

• Indoor Temperature Feedback

• One touch overrides (with optional User Switch)

• Only requires 2 Wires Per Zone

• Outdoor Temperature Reset

• Powered pump outputs

• Setpoint operation

• Single on/off, two stage, or modulating boiler control

• System Setback (with optional Timer)

• Variable speed, floating action, or proportional mixing control

• Warm Weather Shut Down

• Zone Synchronization

• tN4 expansion terminals

Specifications

Control	Microprocessor control. This is not a safety (limit) control.
Packaged weight	1.4 lbs (640 g)
Dimensions	5.5" H x 5.5" W x 2.25" D (140 x 140 x 57 mm)
Enclosure	NEMA 1 rated, blue PC+ABS plastic
Approvals	CSA C US, meets class B: ICES & FCC Part 15
Ambient conditions	Indoor use only, 32 to 104°F (0 to 40°C), RH 90% Non-condensing
Power supply	24 V (ac) ±10% 60 Hz, 100 VA max, Class 2
Control load	2 VA
Floating action load	89 VA, 24 V (ac), 3.7 A
Boiler stage 1, 2 relays	24 V (ac) 5 A
Pump power	115 V (ac) 12 A max
Pump relays	115 V (ac) 5 A, 1/6 hp
Variable pump	115 V (ac) 2.4 A
Setpoint and DHW calls	Short, 0 - 32 V (ac)
Boil/Mix modulating output	0 - 10 V (dc) 500 Ω min load impedance, 4 - 20 mA 1 kΩ max load impedance
Sensors	NTC thermistor, 10k @ 77°F (25°C ± 0.2°C) ß=3892
included	Outdoor Sensor 070 and 2 of Universal Sensors 082
-Optional	tekmar type#: 033, 479
Warranty	Limited 3 Year Warranty

Technical

In most cases the current version of literature will work, otherwise use the piece of literature most closely matching the date code of your product.

Current Literature

Product Submittal	Jan 2011 - Present	403_C
Installation & Operation Manual	Jul 2011 - Present	403_D
Quick Setup Guide	Sep 2010 - Present	403_Q

Archived Literature

Installation & Operation Manual

Sep 2010 - Jul 2011

403_D

Service Bulletins

Active Service Bulletins

Installing House Controls 400, 401, 402 and 403 with Modulating Boilers

Mar 2011 - Present

SB0064

Archived Service Bulletins

Modulating Boiler Interface Revision 8

Mar 2011 - Mar 2011 (Updated March 2011)

SB0032

tekmar Accessory Products (32 total)