tekmar Snow Melting Control 650

Control Description The Snow Melting Control 650 is a microprocessor-based manual start / stop control that maintains a set temperature in a snow melting slab. The 650 uses pulse width modulation (PWM) to operate an on / off injection valve, pump, boiler or contactor for electric cables. Other 650 features include Slab Outdoor Reset, Warm Weather Cut Off, Cold Weather Cut Off, Snow Melting Setpoint and Snow Idling Setpoint. The control also has a built-in timer for timed melting events.

Literature	—	D 650, A 650's, D 001, D 070, D 079
Control	—	Microprocessor PI control; This is not a safety (limit) control
Packaged Weight	—	1.3 lb. (600 g), Enclosure C, white PVC plastic
Dimensions	—	4-3/4" H x 2-7/8" W x 7/8" D (120 x 74 x 22 mm)
Approvals	—	CSA C US, meets ICES & FCC regulations for EMI/RFI
Ambient Conditions	—	Indoor use only, -20 to 120°F (-30 to 50°C), < 90% RH non-condensing
Power Supply	—	Class 2, 24 V (ac) ±10% 50/60 Hz 2 VA or 32 V (dc) ±20% 0.04 A
Relays	—	240 V (ac) 10 A 1/3 hp, pilot duty 240 VA 2 A
Sensors Included	—	NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 Outdoor Sensor 070 and Slab Sensor 072
On Time	—	0:30 to 19:50 hours to 'Infinite'
Melting	—	34 to 45°F (1 to 7°C)
Idling	—	Off, 23 to 34°F (Off, -5 to 1vC)
CWCO	—	Off, -22 to 23°F (Off, -30 to -5°C)
Temperature Display	—	Fahrenheit / Celsius

Quick
links:

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

Literature

Control

Packaged Weight

Dimensions

Approvals

Ambient Conditions

Power Supply

Relays

Sensors Included

On Time

Melting

Idling

CWCO

Temperature Display