What turns on a circulator pump?
On a call for heat the thermostat, connected to the aquastat primary control, will operate a circulator control relay inside the aquastat to turn on the circulator pump, or on some systems the thermostat may be connected to a separate circulator relay discussed just below.
What controls the zone valve?
Each zone valve is controlled by its own zone thermostat. End switches in each zone valve control the central circulator and the burner. On a call for heat, the valve is opened.
What is a hydronic zone control?
The Zone Valve Control 304V connects up to four thermostats and operates zone valves to provide heating to a zoned hydronic heating system. 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.
Why do I need a zone valve?
Zone valves are responsible for reducing energy wastage, they ensure that hot water and therefore heat is there as and when you need it, however, they also ensure that when you don’t need it, energy is not wasted on heating a system that is not in use.
Which is better zone control or circulator pump?
And adding zone control to an existing heating system may be less costly by adding a zone valve than by adding a circulator pump. The fans of heating zone valves argue that the valves are easier to install, less expensive, and require less maintenance than individual circulator pumps. You’ll read below that not everyone agrees with this view.
How are circulator pumps used to control heating?
Circulator relays on heating boilers – an older and by some heating service technicians, a preferred method to control the distribution of heat to individual building areas uses a individual circulator pump to force heating water through each individual heating zone piping.
Can a circulator be used to control multiple heating zones?
with INDIRECT FIRED WATER HEATERS. Even when multiple circulators are in use to control heating zones in a building it may be easier to use a zone control valve if you decide to split a heating zone into two separate loops or control areas.
How does the low switch control the circulator?
The low switch indirectly controls the heating circulator by locking out (keeping off) the circulator pump assembly if the boiler temperature drops into the low range. Check valves control circulator flow or flow rate and may be used to balance heating zone flow or heat output.
And adding zone control to an existing heating system may be less costly by adding a zone valve than by adding a circulator pump. The fans of heating zone valves argue that the valves are easier to install, less expensive, and require less maintenance than individual circulator pumps. You’ll read below that not everyone agrees with this view.
with INDIRECT FIRED WATER HEATERS. Even when multiple circulators are in use to control heating zones in a building it may be easier to use a zone control valve if you decide to split a heating zone into two separate loops or control areas.
Circulator relays on heating boilers – an older and by some heating service technicians, a preferred method to control the distribution of heat to individual building areas uses a individual circulator pump to force heating water through each individual heating zone piping.
The low switch indirectly controls the heating circulator by locking out (keeping off) the circulator pump assembly if the boiler temperature drops into the low range. Check valves control circulator flow or flow rate and may be used to balance heating zone flow or heat output.
