Vaillant ecoTEC pro 24 Installation And Maintenance Instructions Manual

Also see for ecoTEC pro 24: Instructions for use Instructions for installation and servicing Instructions for installation and servicing Instructions for installation and servicing

Installation 50020244995_02 ecoTEC pro Installation and maintenance instructions 135.1.3 Using the correct type of gasUsing the incorrect type of gas may cause fault shutdowns inthe product. Ignition and combustion noise may occur in theproduct.▶ Only use the gas type listed on the data plate.5.1.4 Required preliminary work1. Install a stop cock in the gas line.2. Make sure that the existing gas meter is capable ofpassing the rate of gas supply required.3. Install a system separator (to be provided on-site) dir-ectly on the cold water connection for the combinationunit.4. Check that the volumetric capacity of the expansionvessel is sufficient for the system volume.Conditions: The volume of the installed expansion vessel is insufficient▶ Install an additional expansion vessel, connected asclose to the product as possible, in the heating return.Conditions: External expansion vessel installed and warm start active▶ Install a non-return valve in the product outlet (heatingflow) or decommission the internal expansion vesselin order to prevent the warm start function from beingincreasingly activated due to backflow.5. Install a tundish with siphon for the condensate dis-charge and the exhaust pipe on the expansion reliefvalve. Lay as short a drain line as possible, at a down-ward gradient away from the tundish.6. Insulate bare pipes exposed to environmental influ-ences to protect them from frost using suitable insu-lating material.5.2 Installing the gas connection1. Install the gas pipe in accordance with the recognisedrules of technology.2. Connect the product to the gas line as shown in ac-cordance with the recognised rules of good engineeringpractice.3. Remove the residues from the gas line by blowingthrough the gas line beforehand.4. Purge the gas line before start-up.5.3 Checking the gas line for leak-tightness▶ Check the entire gas line properly for leak-tightness.5.4 Installing the hot and cold water connection1. Make the water connections as shown in accordancewith the relevant standards.2. Ensure correct water pressure and flow requirementsand that any expansion can be accommodated with thecold supply pipe work.5.5 Connecting the heating flow and heatingreturn▶ Make the heating connections as shown in accordancewith the relevant standards.