Operation:

This panel is used as multiple zone system. There is no supply temperature control in the panel. The on/off valves located on the return manifold are fitted with electrical valve actuators to control individual loops in the system. Every actuator must be connected to a thermostat located in the area served by the loop(s). When the thermostat calls for heat, the actuator opens the loop allowing flow. When all loops are satisfied the dry contact in the circulator control module opens. Valves on the supply and return manifolds allow each loop to be isolated when necessary. Balancing valves located on the supply manifold with flow indicators on the return manifold allow the user to adjust and visually monitor the flow rates of each loop.

Each actuator’s operation is controlled by closure of a 24V dry contact. An example of devices that can provide this are: two and three wire room thermostats, programmable thermostats, set point controls, integrated building controls, etc.
The 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 thermostats must be ordered separately according to the project specifications.

The control panel includes:

• Supply manifold with shut off valves
• Return manifold with shut off valves and provision for valve actuators
• Flow rate indicators on return
• Control module
• Actuator modules
• Electrical valve actuators (one per loop)
• Pressure and temperature gauges
• Fill/drain valves
• Isolating valves
• Automatic air vent
• Steel cabinet