The new system is still under warrantee. Call the installer to come fix the problem. If he can't - ask him for the Permit number, his Contractor's license number, and the name of the Bonding Agency who underwrites the Completed Operations Liability Insurance for his company and you'll make a claim with them.
: After having a new central heating boiler installed, i now find that i have air trapped in the pipes.I have tried releasing it from the tank and radiators but the water still runs when the heating comes on. Any suggestions would be great. Thanks.