303P
Switching Relay, Three Zones with Priority
The Switching Relay 303P connects up to three thermostats and operates circulators to provide heating to a zoned hydronic heating system. Zone 1 has optional priority over zones 2 and 3 and can be used to provide heat to an indirect domestic hot water tank. The 303P includes optional exercising to prevent circulator seizure when not in use, and optional post purge operation of the last operating zone to maximize energy savings. The 303P provides a RoomResponse™ signal to modulating-condensing boilers to optimize comfort while improving boiler efficiency.
Features
- Priority override, pump exercising
- RoomResponse™ signal, compatible with all low voltage thermostats
- Unlimited zone expansion, zone priority
- Post purge, LED for each zone, priority, end switch and RoomResponse™
Literature
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Literature
- Brochure - Zoning with the RoomResponse Signal
- Brochure - Hydronic Zone Control Solutions
- Brochure - Zoning with the RoomResponse Signal (French)
- Catalog - tekmar Controls
- Installation and Operation - 303P (Sep 2019 - Present)
- Job Record - 303P (Sep 2019 - Present)
- Solutions de contrôle de la zone hydronique
- Specification Sheet - 303P (Sep 2019 - Present)
- Visio and AutoCAD Applications - 303P
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Approval/Certification Information
For product-specific approval information, please refer to the product’s specification sheet or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:
| ASSE | CSA | FM Approvals | NSF |
| UL | ULC | USC | WQA |