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CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems. It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system's DOS BIOS (typically residing in IBMBIO.COM or IO.SYS) during boot. CONFIG.SYS was introduced with DOS 2.0.

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  1. J

    Radiators not getting heated due to hot water priority

    Hello all, I live in Lisbon, Portugal and having a hard time getting good advice on my heating system: Vaillant Ecotech plus boiler, Vsmart controller and 200L Junkers hot water tank. I understand the system prioritises hot water but it is to the extent that in normal operating mode the...
  2. H

    Priority cold water flow to combi

    I understand that its normal for output flow from a combi to reduce when the inlet cold water flow is reduced (when other outlets are opened) but is there a method/process/configuration that can be adopted to minimise the effect in the the drop in flow and in doing so, provide a priority flow...
    • hometech
    • Thread
    • america cold cold water combi flow priority usa water
    • Replies: 30
    • Forum: USA
  3. S

    Priority domestic hot water PDHW

    Hi everyone, I have a customer who needs a new system boiler, currently has a 22kw which I've roughly calculated as enough heat output for the heating (its a 6 bed victorian terrace house), but this doesn't take the 200l unvented cylinder demand into account. Currently the system is setup on S...
  4. V

    UFH heat starvation?

    Hello guys. I am having a number of issues with my Central Heating system. It was commissioned in July 2019 whereby the heating was not turning on (via the room stats) due to the summer weather understandbly. I only noticed these problems in the winter when my heating expectations were not...
    • v1nn1e
    • Thread
    • america heat intergas priority ufh under floor heating usa
    • Replies: 13
    • Forum: USA
  5. bright spark

    Viessmann vitodens 100w( 4 pipe with hw priority)

    Went to a call today. Was actually a service. Customer had only been using hot water feature on boiler for Summer. Circulation not great. Boiler hitting temperature but circulation to rads not great and circulation to cylinder could be better when set up to heat hot water. Anyway, I had a spare...
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