Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

Also see for ecoTEC sustain 24: Operating instructions Installation and maintenance instructions

0020253094_05 ecoTEC sustain Installation and maintenance instructions 3310.3 Setting the maximum heating outputThe product's maximum heating output is set to automaticmode at the factory. If you want to set your own fixed max-imum heating output, however, you can specify a value un-der d.00 which equates to the product output in kW.10.4 Setting the maintenance intervalIf you set the maintenance interval, after a configurable num-ber of burner operating hours, the message that the productmust be serviced appears in the display, together with themaintenance symbol .▶ Use diagnostics code d.84 to set the number of operatinghours until the next maintenance is due (number of op-erating hours = display value x 10). Guideline values canbe found in the following table.Heat de-mandNumberof per-sonsGuideline value for burneroperating hours until thenext inspection/maintenancework is due for an averageoperating time of one year(dependent upon the systemtype)5.0 kW 1 ‑ 2 1050 h2 ‑ 3 1150 h10.0 kW 1 ‑ 2 1500 h2 ‑ 3 1600 h15.0 kW 2 ‑ 3 1800 h3 ‑ 4 1900 h20.0 kW 3 ‑ 4 2600 h4 ‑ 5 2700 h25.0 kW 3 ‑ 4 2800 h4 ‑ 6 2900 h> 27.0 kW 3 ‑ 4 3000 h4 ‑ 6 3000 hThe values stated correspond to an average operating timeof one year.If you do not set a numerical value but do set the symbol"– – –", the function is not active.NoteOn completion of the set operating hours, youmust set the maintenance interval again.10.5 Setting the pump outputValidity: VUW 246/7-2 (H-GB)OR VUW 286/7-2 (H-GB)OR VUW 346/7-2 (H-GB)The product is equipped with a speed-regulated high-effi-ciency pump, which adjusts independently to the hydraulicconditions of the heating installation.If you have installed a low loss header in the heating install-ation, we recommend switching off the speed regulation andsetting the pump output to a fixed value.▶ If required, change the setting of the pump speed, whichdepends on the operating mode, under diagnostics coded.14.Remaining feed head of the pumpPump curveValidity: VUW 246/7-2 (H-GB)OR VUW 286/7-2 (H-GB)60 500 1000 1300AB05101520253035405321 471 PWM 65%2 PWM 73%3 PWM 80%4 PWM 88%5 PWM 95 to 100%6 Saturation 25 kPa7 Saturation 17 kPaA Flow rate in circuit (l/h)B Available pressure(kPa)Pump curveValidity: VUW 346/7-2 (H-GB)60 500 1000 1400 AB05101520253035405321 471 PWM 65%2 PWM 73%3 PWM 80%4 PWM 88%5 PWM 95 to 100%6 Saturation 25 kPa7 Saturation 17 kPaA Flow rate in circuit (l/h)B Available pressure(kPa)10.6 Setting the bypassCaution.Risk of material damage caused by incor-rect setting of the high-efficiency pumpIf the pressure at the bypass is increased (byturning clockwise) and the pump output isset to less than 100%, the product may notoperate correctly.▶ In this case, set the pump output to5 = 100% using diagnostics code d.14.▶ Remove the front casing. (→ Page 18)