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