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.
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)
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
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