303P, 3-Zone Switching Relay w/ Priority, Expandable Tekmar
303P, 3-Zone Switching Relay w/ Priority, Expandable
Brand: Tekmar
Part#: 303P
In Stock
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Description

Tekmar 303P 3-Zone Switching Relay connects up to (3) low-voltage (24V) thermostats and (3) circulating pumps, providing heating to zoned hydronic and radiant floor heating systems. There is an optional priority of Zone 1 over the Zones 2 and 3. Zone 1 can also be used to provide heat to an indirect hot water tank. Compatible with all thermostat and circulator brands.

Features:
  • Compatible with all 24V thermostat brands (Tekmar, Honeywell, etc.)
  • Compatible with all 115/120V circulator pump brands (Taco, Grundfos, Armstrong, Wilo, etc.)
  • Unlimited zone expansion
  • RoomResponse signal for energy efficiency
  • Priority override, pump exercise and post purge
  • External LED indicators
  • Fused pump and transformer protection (includes two spare fuses)
  • CSA approved

Technical Specifications:
  • Zones: 3
  • Control: Microprocessor Control
  • Power supply: 115 VAC, 60 Hz, 16 A
  • Transformer Rating: 40 VA at 24 VAC
  • Control load: 7 VA at 24 VAC
  • Fuses: T5A, 250 V slow blow glass fuse, two spare fuses included
  • Pump relays: 115 VAC, 5 A, 1/3 HP, 15 A combined
  • Boiler XX end switch: 24 VAC, 5 A
  • DHW end switch: 24 VAC, 5 A
  • Mod boiler output: 0-10 V 500 ohm min load impedance, 4-20 mA 1 k ohm max load impedance
  • Materials: ABS Plastic (Cover), Galvanized Steel (Base) NEMA type 1
  • Dimensions: 8-3/16" x 10-11/16" x 2-3/8"
  • Packaged weight: 5 lbs

Warranty:
3-year warranty

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