Correct Installation of an Underfloor Heating System

Installation
Installation of the manifold and mixing kit if installing a cabinet, it must be installed in such a way that the distribution manifold is higher than the pipe level in order to guarantee the venting of the system.The position of the manifold and mixing kit will respect the design parameters and will therefore be in a central position relative to the rooms to be heated which will make sure none of the underfloor loopes are too long.

Installation of the piping
Before installing the pipe, it is necessary to verify on the project which room to start with. The circuits shall be installed consecutively to avoid that the supply routes from the manifold to the heating loops of the rooms, do not cross over each other.The laying of the pipe must start at the supply manifold and the pipes should be laid in accordance to the engineers designs.For pipe bending the minimum radius must be observed to avoid kinking the pipe.Connect the supply and return of the circuit to the manifold. Remember to record the initial and final length of pipe used for each circuit by marking pipe.This is done to record the total length of pipe used.

Filling the System
Close all the interception valves both at the supply and return of the manifold. Close all the flow check valves at the supply manifold. Connect the supply pipe of the test pump by removing the insert of the supply manifold drainage valve. Open the drainage valve on the return valve, connecting a pipe to the insert for the transport of the water to the drain. Open the flow check valve of the first circuit and circulate the water until the air contained in the circuit has been expelled. Close the circuit flow check valve and repeat the operation for the other circuits. Once the filling operation of the circuits has finished close the drainage valve on the return manfoild.

Leak test
Open all the flow check valves. The test pressure is to be twice the working pressure with a minimum of 5 bar. Verify the absence of leaks by controlling the entire circuit pressure on the pressure gauge. The pressure shall be applies to the pipes during laying of screed. Where there is a danger of freezing, it is necessary to add anti-freeze liquid to the water.If no further frost protection is necessary for the normal operation of the system, the liquid shall be removed and the system shall be flushed, by changing the water at least 3 times.

Laying of the screed
The cement must be made without the use of insulation agents. The cement must be poured with the system working at a pressure of 5 bar and the temperature of the room must not fall below 5 degrees

Heating Up
The heating up of the underfloor heating system shall be carried out at least 21 days after the laying of the cement screed. The initial heating up commences at a supply temperature between 20 and 25 degrees which shall be maintained for 3 days. Subsequently the maximum design temperature shall be set and maintained for at least another 4 days. At the end of the test the finished floor covering can be laid.

Heating Solutions Ltd
Solar Panels – Underfloor Heating – Heat Pumps
29 Suil na Habhann, Mill Rd, Limerick, Ireland
Tel: 086 3823062; Fax: 061 346011
Email: info@heating-solutions-ireland.com
http://www.heating-solutions-ireland.com/