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tN2 House Control 402 - Boiler, DHW & Setpoint, Mixing, Four Zone Valves

The tekmarNet^® 2 House Control 402 is designed to operate all 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 valves, and can expand up to 24 zones in total for each space heating water temperature.

How do I purchase this product?

Contact your Local Representative for details.

Note: There are multiple products which the 402 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 24 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 lb. (640 g)
Dimensions	5.5" H x 5.5" W x 2.25" D (140 x 140 x 57 mm)
Enclosure	Blue PC+ABS plastic, NEMA type 1
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
Zone valve/floating action load	89 VA, 24 V (ac), 3.7 A for zones 1 to 4 plus floating action output
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 modulation output	0 - 10 V (dc) 500 Ω min load impedance, 4 - 20 mA 1 kΩ max load impedance
Sensors	NTC thermistor, 10 kΩ @ 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