Coplanar manifolds

This section features a group of accessories that are particularly useful for area climate control systems. Some of the various components include:

• Coplanar manifolds: distributes the thermal carrier fluid towards the terminals of the heating system and collects the return water, directing it back to the boiler. They are available in versions from 4 + 4 up to 12 + 12 derivations and can be connected to copper, polyethylene and multilayer tubing. Their unique construction allows for very low load losses and since they do not have main conduits there is no crossing of derivations. They are also easily expandable through the use of our special soft seal swivel fittings.

• Zone valve: intercepts an area of the heating system by enabling/disabling the distribution of hot water to the users.This is a three-way valve with one inlet and two outlets, one on the straight line and one on the angled one. The opening of one of the outlets automatically excludes the other. IVAR offers two choices for Zone Valves: one with a piston cut-out system, the other with a ball system. The first has an on/off type electro-thermal head controlled by the zone thermostat acting on the shutter by opening one of the two ways - the straight way for supply to the terminals or the square way for flow recirculation - depending on requirements. Our piston zone valves also offer the possibility of balancing the circuit thanks to the pawl on the bypass way: in this way, it is manually possible to set the same pressure loss generated by the terminals down-line of the zone valve; the circuit is thereby always balanced whether the valve operates in supply or bypass conditions. Ball-type zone valves, on the other hand, are driven by a rotary on-off servo-control with power supply at 24 VAC or 230 VAC which, by acting on the ball, command the opening of the straight way for flow distribution to utilities or closing by enabling the bypass way. Once again in this case, management of the servo-control is assured by the zone thermostat. Ball-type zone valves are recommended whenever high Kv values are required; the ball, in short, ensures total passage by minimising losses of load. Moreover, ball valves make it possible to apply higher differential pressures without the risk of seeping through the way being closed, as well as the possibility of shorter and more constant manoeuvre times.

• Pressure relief valve: keeps the differential pressure level between the manifold’s supply and return line from going beyond the preset level. This could occur, for example, if all of the thermostatic valves installed at the entrance of the radiator should close. The regulation field varies between 0.2 and 0.6 bar. This valve also offers the possibility to install manual or automatic air release valves to allow for the removal of air that has accumulated inside the circuit.