304V

Specifications

Control	Microprocessor control. This is not a safety (limit) control.
Packaged weight	5.0 lb. (2250 g)
Dimensions	8-3/16" H x 10-11/16" W x 2-3/8" D (208 x 271 x 60 mm)
Enclosure	Cover: ABS plastic, Base: galvanized steel, NEMA type 2
Approvals	CSA C US
Ambient conditions	Indoor use only, 32 to 122°F (0 to 50°C), RH ?90% non-condensing
Power supply	115 V (ac) ±10%, 60 Hz, 20 A
Transformer	40 VA, expandable to 80 VA with additional transformer M3069 (sold separately)
Control load	7 VA
Fuses	T5A 250 V slow blow, two spare fuses included
Zone valve outputs	24 V (ac), 2 A max per output
Zone valve end switch	24 V (ac)
Boiler XX end switch	24 V (ac), 5 A
DHW end switch	24 V (ac), 5 A
Mod boiler output	0-10 V (dc) 500 ? min load impedance / 4-20 mA 1 k? max load impedance
Pump relays	230 V (ac), 5 A, 1/3 hp
Warranty	Limited 3 Year Warranty

The Zone Valve Control 304V connects up to four thermostats and operates zone valves to provide heating to a zoned hydronic heating system. The 304V operates a system pump whenever a zone valve opens. Zone 1 can operate either a zone valve or a circulator to provide heat to an indirect domestic hot water tank with optional priority over zones 2 through 4. The 304V includes optional exercising to prevent circulator seizure when not in use, and optional post purge operation of the domestic hot water tank to maximize energy savings. The 304V provides a RoomResponse™ signal to modulating-condensing boilers to optimize comfort while improving boiler efficiency.

Features

• Compatible with 2, 3 and 4-wire zone valves, unlimited zone expansion

• Pump exercising, post purge

• Zone priority, priority override

• RoomResponse™ signal, compatible with all low voltage thermostats

Tekmar 304V Submittal

Tekmar RoomResponse Brochure

Tekmar 304V Installation Manual