The Snow Detector & Melting Control 664 is designed to operate mechanical equipment to melt snow off of up to 2 outdoor slabs. It can be used in hydronic snow melting applications consisting of up to 2 zones and 2 boilers where each zone can operate at an independent temperature. This product uses a tekmar snow/ice detection sensor in order to automatically melt snow in a priority sequence while protecting the boiler plant with a mixing device. It is capable of controlling up to 2 boilers, a variable speed or modulating (4-20 mA) mixing device, a mix system pump, and 2 zone pumps.
Features
Automatic snow detection and melt control (with 090 Sensor)
Boiler Protection
CSA C US certified (approved to applicable UL standards)
Cold Weather Cut Out
Control up to 2 boilers
Control up to 2 zones
Equipment Exercising
Manual Override
Mixing control (floating, variable speed, or proportional)
Optional priority zoning operation
Remote display and adjustment capabilities
Slab protection for the snow melting system
Slab temperature control
Temporary Idle
Test sequence to ensure proper component operation
Warm Weather Shut Down
Specifications
Control
Microprocessor control. This is not a safety (limit) control
Packaged weight
3.5 lb. (1600 g)
Dimensions
6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm)
Enclosure
Blue PVC plastic, NEMA type 1
Approvals
CSA C US, meets class B: ICES & FCC Part 15
Ambient conditions
Indoor use only, 32 to 122°F (0 to 50°C), RH ≤90% Non-condensing
Power supply
115 V (ac) ±10%, 50/60 Hz, 600 VA
Floating relays
230 V (ac) 5 A, 1/6 hp
Stage/Zn/P1 relays
230 V (ac) 5 A, 1/3 hp
Var. pump
230 V (ac) 2.4 A max (FLA) 5 A max (LRA), fuse T2.5 A 250?V
