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

Brand: TekmarSKU: 402

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Overview Details for 402

tN2 House Control - 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.

Features

DHW priority (optional), setpoint operation
Exercising, Boiler Protection
DHW post purge, DHW control
Outdoor temperature reset, indoor temperature feedback
Expandable up to 48 zones, single on/off, two stage, or modulating boiler control
Variable speed, floating action, or proportional mixing control, automatic boiler differential
Warm weather shut down, zone synchronization
Only requires 2 Wires Per Zone, Four 24 V (ac) powered zone outputs
For use with tekmarNet^® 2 thermostats only, tN4 expansion terminals

Specifications

Item Number	402
Brand	Tekmar
Category	tekmarNet Controls
Agency Approvals	CSA C US, meets class B: ICES & FCC Part 15
Ambient Conditions	Indoor use only, 32 to 104 degrees F (0 to 40 degrees C), RH less than or equal to 90 percent Non-condensing
Boiler Stage1 Stage2 Relay	24 V (ac) 5 A
Calls	Setpoint and DHW calls, Short, 0 - 32 V (ac)
Control Load	2 VA
Control Type	Microprocessor control, this is not a safety (limit) control
Dimensions	5.5" H x 5.5" W x 2.25" D (140 x 140 x 57 mm)
Enclosure Material	Blue PC+ABS plastic
Enclosure NEMA Rating	NEMA 1
Hydronic - HVAC Control Type	tN2 House Control
Modulating Output	Boiler modulation 0 - 10 V (dc) 500 ohms min load impedance, 4 - 20 mA 1 k ohms max load impedance
Power Supply	24 V (ac) plus / minus 10 percent, 60 Hz, 100 VA max, Class 2
Pump Power	115 V (ac) 12 A max
Pump Relay	115 V (ac) 5 A, 1/6 hp
Sensor	NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892
Variable Pump	115 V (ac) 2.4 A
Zone Valve - Floating Action Load	89 VA, 24 V (ac), 3.7 A for zones 1 to 4 plus floating action output