tekmar Universal Reset Module 423

Universal Reset Module 423

Control Description The Universal Reset Module 423 provides outdoor reset to a hydronic heating system in order to maximize comfort and efficiency. The 423 can operate two on / off boilers or two modulating boilers. The 423 can override the outdoor reset water temperature to provide Domestic Hot Water or Setpoint operations. The 423 can operate four outdoor reset water temperatures, up to three of these water temperatures can be mixing water temperatures. To operate a mixing device, a Mixing Expansion Module must be connected to the 423 for each mixing water temperature.

Control	—	Microprocessor PID control; This is not a safety (limit) control
Packaged Weight	—	1.9 lb. (1638 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 and FCC Part 15
Ambient Conditions	—	Indoor use only, 32 to 122°F (0 to 50°C).
	—	RH equal to or less than 92% to 104°F (40°C), down to 50% above 104°F (40°C)
	—	Altitude <3000 m (9840 ft), Installation Category II, Pollution Category 2
Power Supply	—	Provided by interconnected Zone Manager
DHW Pump Relay	—	115 V (ac) 5 A 1/4 hp, pilot duty 240 VA
Primary Pump Relay	—	115 V (ac) 5 A 1/4 hp, pilot duty 240 VA
Combined Load	—	10 A Maximum (for DHW and Primary Pump)
DHW Valve Output	—	24 V (ac) 8 VA Maximum
Modulation Output	—	0-10 V Minimum 2500 Ω
Boiler Relay	—	115 V (ac) 5 A 1/4 hp, pilot duty 240 VA
Demands	—	20-260 V (ac) / 0.1 VA @ 24 V
Sensors	—	NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
Included	—	Outdoor Sensor 070 and Universal Sensor 071

Quick
links:

002 003 004 005 007 011 024 031 032 033 039 040 060 062 070 071 072 073 076 077 078 079 080 081 082 083 084 090 092 132 150 152 153 155 156 157 161 162 256 257 260 261 262 263 264 265 268 269 270 275 279 325 326 335 336 337 345 346 356 360 361 362 363 364 365 369 374 420 421 422 423 440 441 444 479 480 481 483 507 508 509 510 511 512 537 538 540 541 542 543 544 545 546 650 664 665 667 704 710 720 741