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Tekmar Universal Reset Module - Four tN4, Two Boiler, DHW & SP |
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Tekmar Universal Reset Module - Four tN4, Two Boiler, DHW & SP
The Universal Reset Module 423 is designed to operate all of the mechanical equipment in a hydronic heating system, except for zones, 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 four temperature systems comprised of multiple fan coils, baseboard, mixed radiant floor zones, and two modulating/condensing boilers. This control regulates up to four space heating water temperatures through Outdoor Temperature Reset and Indoor Temperature Feedback. It is capable of controlling two on/off or modulating boilers, Domestic Hot Water, setpoint loads, and can expand up to 24 zones for each space heating water temperature (96 in total).
Features
- Automatic Boiler Differential
- Boiler Protection
- Controls up to 4 water temperatures (with use of up to 3 mix expansion modules)
- DHW Post Purge
- DHW Priority (optional)
- DHW control
- Exercising
- Expandable up to 96 zones
- Indoor Temperature Feedback
- One touch overrides (with optional User Switch)
- Outdoor Temperature Reset
- Powered pump outputs
- Setpoint operation
- System Setback (with optional Timer)
- Two on/off or two modulating boiler control
- Warm Weather Shut Down
- Zone Synchronization
Specifications
| Control |
Microprocessor PID control; This is not a safety (limit) control |
| Packaged weight |
1.83 lb. (830 g) |
| Dimensions |
3-5/8" H x 5-3/8" W x 9/16" D (92 x 137 x 14 mm) |
| Approvals |
CSA C US, CSA/UL 61010-1, meets Class B: ICES & FCC Part 15 |
| Ambient conditions |
Indoor use only, 32 to 122°F (0 to 50°C), RH 80% to 88°F (31°C), down to 50% from 104 to 122°F (40 to 50°C), Altitude <6560 feet (2000 m), Installation Category II, Pollution |
| Power supply |
Provided by interconnected tekmarNet Zone Manager |
| Pump relays |
115 V (ac) 5 A, 1/6 hp |
| Combined load |
10 A Maximum (for DHW and Primary Pump) |
| DHW valve output |
24 V (ac) 8 VA Maximum |
| Modulation output |
0-10 V (dc) Minimum 2500 |
| Boiler relay |
115 V (ac) 5 A |
| Demands |
20-260 V (ac) / 0.1 VA @ 24 V |
| Sensors |
NTC thermistor, 10 k @ 77°F (25°C ± 0.2°C) ß = 3892 |
| -Included |
Outdoor Sensor 070 and Universal Sensor 082 |
| -Optional |
tekmar type#: 078 |
| Warranty |
Limited 3 Year Warranty |
Current Literature
Product Submittal |
Jan 2011 - Present |
423_C |
Installation & Operation Manual |
Aug 2007 - Present |
423_D |
Job Record |
Aug 2009 - Present |
423_J |
Wiring Brochure |
Mar 2009 - Present |
423_W |
Installing tN4 Reset Modules 420, 422 and 423 with Modulating Boilers |
Mar 2011 - Present |
SB0067 |
RF Noise Interference |
May 2009 - Present |
SB0054 |
Part Number: 423
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