MHS Boilers 318 Operating & Maintenance Manual

33, MHS Boilers Ltd © 230307 33 5.3.5.2 Chimney Chimney length Because the appliance is fitted with a “premix burner” with a fan, an over-pressure is built up in the unit. This overpressure is sufficient to overcome the resistance of the cooled burner, heat exchangers, …

6, MHS Boilers Ltd © 230307 6 Ultramax 318 – 559 Dimensions Type 318 376 443 508 559 B* mm 830 930 1130 1130 1230 B1 mm 710 810 960 1010 1110 B2 mm 120 120 170 120 120 B3 mm 646 746 946 946 1046 D mm 250 250 300 300 300 G1 R 11⁄2" - - - - G2 - …

30, MHS Boilers 318 MHS Boilers Ltd © 230307 30 5.3.4.1 General The unit can optionally be supplied as a room sealed appliance. This simplifies the possibilities for installation within the building. Guide lines and installation instructions The flue gas discharge and the air supply systems must be installe…

48, MHS Boilers Ltd © 230307 48 6 .2 Regulation Depending on the heating demand, the unit will be started up and shut down between 0% and 25% capacity and will be continuously modulated between 25% and 100% capacity. 6.3 Control module Lid closed Lid open 1 Function 1…

53, MHS Boilers Ltd © 230307 53 Check the chimney Check the chimney. Ensure that the connection between the appliance and the chimney is such that gasses cannot escape. The flue must be connected to outer white flexible seal and not the inner vertical extension. Bleed the gas pipework Ope…

12, MHS Boilers Ltd © 230307 12 2.2 Ultramax 318-559 Main components 1 Return connection 19 Flue gas collection chamber 2 Flue gas discharge attenuator 20 Combustion chamber 3 Water flow switch 21 Electrical cable duct 4 Safety valve 22 Condensate discharge 5 Inlet …