© 2019 tekmar 304V_D - 10/19
304V_D
10/19
Zoning
Replaces: 11/16
Zone Valve Control 304V
Installation & Operation Manual
• RoomResponse
TM
signal
• Compatible with all 24 V (ac) thermostats
• Compatible with 2, 3 and 4-wire zone valves
• Unlimited zone expansion
• Zone priority
• Priority override
• Pump exercising
• Post purge
• LED for each zone, priority, end switch and RoomResponse
TM
• Away signal shared between thermostats
• Four ground screws
• Top, bottom and back conduit knockouts
• Fuses protect transformers and pumps
• Two spare fuses included
• CSA approved
Introduction
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
TM
signal to modulating-condensing boilers to optimize comfort while improving boiler efficiency.
Call
Valve
Open
Zone Valve Control 304V
Four Zones with Priority
Power
Priority
System
Pump
Zone 1
Zone 2
Zone 3
Zone 4
RoomResponse
TM
Features
