Description
The Tekmar 303V is a microprocessor‑controlled zone valve panel for hydronic and radiant heating systems. It supports up to three thermostats and three zone valves, with zone 1 capable of priority control for an indirect domestic hot water tank. Features include a RoomResponse™ signal output for modulating‑condensing boilers, pump‑exercising to prevent circulator seizure, optional post‑purge, and LED diagnostics for each zone and system function.
Features
- Supports up to three thermostats and three zone valves
- Zone 1 can be set for priority over zones 2 and 3 (ideal for indirect DHW loads)
- RoomResponse output for modulating‑condensing boiler interface
- Pump exercising to prevent circulator seizure during idle periods
- Optional post‑purge of the last calling zone to maximize efficiency
- LED indicators for each zone, priority status, end‑switch, RoomResponse™ signal
- Conduit knock‑outs at top, bottom and back; fuses protect transformer and pumps; two spare fuses included
- CSA C/US listed for indoor use only
Specs
| Agency Approvals | CSA C US |
| Ambient Conditions | Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), RH less than or equal to 90 percent non-condensing |
| Control Load | 7 VA at 24 V (ac) |
| Control Type | Microprocessor control, is not a safety/limit control |
| Dimensions | 8-3/16" H x 10-11/16" W x 2-3/8" D (208 x 271 x 60 mm) |
| Enclosure Material | ABS Plastic, Glavanized Steel |
| Enclosure NEMA Rating | NEMA 1 |
| Markets | Multifamily Homes, Single-Family Homes, Small Commercial Buildings |
| Power Supply | 115 V (ac) plus / minus 10 percent, 60 Hz, 11 A |
| Pump Relay | 230 V (ac), 5 A, 1/3 hp |
