Vaillant VWL 35/5 AS 230V S2 Operating Instructions Manual

Also see for VWL 105/5 AS S2: Operating, installation and maintenance instructions Operating instructions Operating instructions

Contents

5 Hydraulics installation66 Installation and maintenance instructions aroTHERM 0020257297_02Result 2:The pressure increases.▶ There is a leak: Check the flare connections on theoutdoor unit and indoor unit. Eliminate the leakage.Start the second test (step 7).▶ There is residual moisture: Carry out a drying pro-cess. Start the second test for this (step 7).7. Second test: Switch on the vacuum pump. Drain therefrigerant pipes and the indoor unit's plate heat ex-changer.– Absolute pressure to be reached: 0.1 kPa(1.0 mbar)– Running time of the vacuum pump: 30 minutes8. Switch off the vacuum pump. Wait three minutes.Check the pressure.Result 1:Pressure is stable:▶ The second test is complete. Close the ball valves(2) and (4).Result 2:The pressure increases.▶ Repeat the second test.5.8 Adding additional refrigerantDanger!Risk of injury due to escaping refrigerant.Touching any escaping refrigerant maycause injury.▶ Use protective equipment (protectivegoggles and gloves).1. Determine the basic length of the refrigerant pipe. Cal-culate the required volume of refrigerant.Product Basic length ofthe refrigerantpipeRequired addi-tional refrigerantAll ≤ 15 m NoneVWL 35/5 andVWL 55/5> 15 m 30 g for every addi-tional metre (above15 m)VWL 75/5 toVWL 125/5> 15 m 70 g for every addi-tional metre (above15 m)Condition: Length of the refrigerant pipe > 15 m▶ Ensure that the two isolation valves on the outdoor unitare still closed.R410A23451▶ Connect the refrigerant fitting (2) with the ball valve (1)to a refrigerant cylinder (4).– Refrigerant to be used: R410A▶ Put the refrigerant cylinder on the scales (5). If the refri-gerant cylinder does not have an immersion sleeve, putit on the scales upside down.▶ Leave the ball valve (3) closed. Open the refrigerantcylinder and the ball valve (1).▶ If the hoses have been filled with refrigerant, set thescales to zero.▶ Open the ball valve (3). Fill the outdoor unit with the cal-culated refrigerant volume.▶ Close both of the ball valves.▶ Close the refrigerant cylinder.5.9 Opening the isolation valve, releasing therefrigerantDanger!Risk of injury due to escaping refrigerant.Touching any escaping refrigerant maycause injury.▶ Use protective equipment (protectivegoggles and gloves).11. Remove both covering caps (1).2. Unscrew both hexagon socket screws as far as they willgo.◁ The refrigerant flows into the refrigerant pipes andthe indoor unit (heat exchanger).