Operation:

This panel is designed to operate single zone heating systems where water temperature control in needed. The desired supply temperature is set using a tempering valve. This allows to use the system with a wide range of boiler supply temperatures. Regardless of the incoming fluid temperature the mixing valve maintains the set temperature in the floor loops.
The systems are usually designed with pipe loops of equal length. Flow meters on the return manifold help balancing the various loop lengths if required. Valves on the supply and return manifolds are used if flow rate compensation is required.
The addition of optional power heads on the return manifold can also provide for zoning. Valves on the supply and return manifolds allow each loop to be isolated when necessary.

The operation is controlled by closure of an external dry contact. An example of devices that can provide this are: two and three wire room thermostats, programmable thermostats, set point controls, indoor/outdoor reset controls, integrated building controls, etc.
A control module contains a 24V transformer, a circulator relay, a dry contact enable, and an adjustable high limit which prevents the supply fluid from exceeding the desired temperature.

The control panel includes:

• Supply manifold with shut off valves
• Return manifold with shut off valves and provision for valve actuators
• Control module
• Circulator
• 3 way mixing valve valve
• Pressure and temperature gauges
• Fill/drain valves
• Isolating valves
• Automatic air vent
• Steel cabinet