Vaillant ECOTEC EXCLUSIVE 627 VU 256/5-7 Installation And Maintenance Instructions Manual

Vaillant ECOTEC EXCLUSIVE 627 VU 256/5-7 Installation And Maintenance Instructions Manual Manual pdf 25 page image

Adapting the unit to the heating installation 80020193966_01 ecoTEC exclusive Installation and maintenance instructions 258.2.2 Resetting the remaining burner anti-cyclingtime1. Alternatives 1 / 2▶ Navigate to Menu → Reset anti-cycl. time.◁ The current burner anti-cycling time appears inthe display.▶ Press to reset the burner anti-cycling time.1. Alternatives 2 / 2▶ Press the Fault clearance button.8.3 Setting the maintenance interval1. Navigate to Menu → Installer level → Diagnosticsmenu → D.084 Maintenance in and confirm by press-ing .2. Set the maintenance interval (operating hours) until thenext maintenance work is due and confirm by pressing.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 h8.4 Setting the pump output1. Navigate to Menu → Installer level → Diagnosticsmenu → D.014 Pump speed target value and confirmby pressing .2. Set the required pump output.Conditions: Low loss header installed▶ Switch off the speed regulation and set the pump outputto a fixed value.8.4.1 Remaining pump head8.4.1.1 Pump characteristic line 627 (VU 256/5-7)350400300250200150100500 600200 400 800 1000 1400 16001200 1800 BA100%80%70%60%53%A Remaining feed head[hPa (mbar)]B System volume flow [l/h]8.5 Setting the bypass valveCaution.Risk of material damage caused by incor-rect setting of the high-efficiency pumpIf the pressure at the bypass valve is in-creased (by turning it clockwise) and thepump output is set to less than 100%, theproduct may not operate correctly.▶ In this case, set the pump output to5 = 100% using diagnostics code D.014.▶ Remove the front casing. (→ Page 11)1▶ Regulate the pressure using the adjusting screw (1).Position of theadjusting screwPres-surein MPa(mbar)Notes/applicationRight-hand stop(turned all theway down)0.035(350)If the radiators do not heatup sufficiently at the defaultsetting. In this case, youmust set the pump to themaximum speed.Mid-position(5 turns to theleft)0.025(250) Default setting