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Tekmar 303V Zone Valve Control allows to connect up to (3) thermostats and operates (3) zone valves, providing heating to a zoned hydronic or radiant heating system. Zone 1 has an optional priority over Zones 2 and 3 and can operate either a zone valve or a circulating pump to provide heat to an indirect hot water tank. 303V also includes optional circulator exercising and post purge operation of the domestic hot water tank. Compatible with all thermostat and zone valve brands.
Technical Specifications:
Features:
Technical Specifications:
- Zones: 3
- Control: Microprocessor Control
- Power supply: 115 VAC, 60 Hz, 11 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
- Zone valve outputs: 24 VAC, 2 A max each, one transformer 33 VA, two transformer 73 VA
- Zone valve end switch: 24 VAC
- Pump relays: 230 VAC, 5 A, 1/3 HP
- 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
Features:
- Compatible with all 24V thermostat brands (Tekmar, Honeywell, etc.)
- Compatible with all brands of 2, 3 or 4-wire zone valves (Taco, Honeywell, Caleffi, etc.)
- Zone priority and unlimited zone expansion
- RoomResponse signal for energy efficiency
- Includes priority override, pump exercising and post purge
- External LED indicators for zones, priority, end switch and RoomResponse
- Fused pump and transformer protection (includes two spare fuses)
- CSA approved