Johnson Controls AS Non-permitted uses, Installation, Suction and inflow conditions, Piping

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6.0 Non-permitted uses

Do not use the pump with a suction pressure greater than the specified value (0.5 times the discharge head generated by the pump).

The pump must always be used in an environment appropriate to the level of protection of the motor. Always check this on the motor plate before installation.

The pump may not be used in environments which require a higher level of protection or a higher specification motor or electrical parts.

Components complying with the safety standards for the environment in question must be used.

7.0Installation

7.1Suction and inflow conditions

(NPSH = Net Positive Suction Head) NPSH of system (available NPSH)

In order to ensure that pump operation is free from cavitation, it is essential to observe the maximum permitted suction lift ha geo max or the minimum allowable head hc geo min. NPSH of pump (required NPSH)

The centrifugal pumps can operate correctly only if vapour has not formed inside. For this reason the static head at the reference point for the NPSH is the centre of the impeller, that is the point of intersection of the pump shaft axis with the vertical plane that passes through the external points of the blade inlet corners.

NPSHnec. is the value required by the pump, expressed in metres, obtained from the performance curve. In practice 0.5 m should be added to this value as a safety margin.

7.2Piping

In order to prevent the creation of harmful stresses, the suction and discharge pipes must be connected to the pump ports without the use of force. These pipes must also be supported independently avoiding causing stresses on the pump. The internal diameter must be the same size as the pump connections. It must in any case not be smaller to avoid head loss and/or poor performances. Always use elbows with large radius. If the pipe diameter changes along the line, use reduction cones, choosing the ones that are most suitable for avoiding the formation of air pockets (Fig. 1).

The suction pipe must be as short as possible and rise as it moves towards the pump if it is sucking from a tank, if on the other hand the pump is below the level of the liquid, the pipe should descend slightly. If the pump is used for transporting hot liquids, fit expan- sion joints to compensate any expansion of the piping. The maximum velocity of the liquid in the suction pipe must not be greater than 3 m/s. Velocities between 1 and 2 m/s are recommended.

The suction pipe must be designed in such a way as to prevent air from entering the pump. For this reason, when sucking from a tank located at a lower level, the pipe must reach below the free surface of the liquid. Avoid creating obstacles which could increase suction losses disrupting smooth fluid flow. Make sure that there are no restrictions,

NO

YES

Fig. 1

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IM-AS/02.00 GB (0412)

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Contents TopClean AS CE Declaration of conformity Index 14.0 Trouble shooting chart 15.0 Disposal of the pump Symbols Safety warnings IntroductionTransportation, receipt and transferring of goods TransportationReceipt TransferringDescription Sound pressure levelInstallation Non-permitted usesSuction and inflow conditions PipingPreliminary operations and starting OperationElectrical connection Cleaning the pump Spare partsOperating checks Extended stopSeals Disassembly and Assembly AS-series General instructionsRings and lip seals ShutdownRemoval of pump casing and impeller AS 42 and AS DisassemblyRemoval of pump casing and impeller AS 40, 50, 60, 65 Seal disassembly ExecutionClearances AssemblyBearing removal Pump assembly AS 40, 50, 60 Seal assemblyExecution Pump cover and Impeller assembly AS 42 and AS Spare parts lists and sectional drawings Spare part list AS 40, 50, 60-6512.2 AS 40 Execution T, Q 12.3 AS 50 Execution T, Q 12.4 AS 60-65 Execution T, Q 12.5 AS 80 Execution T, Q Spare part list AS 42 Pos Denomination Material12.7 AS 42 Execution T, Q 12.8 AS 52 Execution T, Q 13.2 AS 40-50-60-65-80 without shroud 1450 rpm Dimensions and weights13.1 AS 40-50-60-65-80 with shroud 1450 rpm 13.3 AS 42-52 with shroud 1450 rpm 13.4 AS 42-52 with shroud 1450 rpmTrouble shooting chart Pump does not primeDisposal of the pump Johnson Pump Industry Group

AS specifications

Johnson Controls AS is a leading global company that specializes in automotive batteries and advanced automotive technologies. With a rich history spanning over 130 years, it has become a vital player in the automotive supply industry. Headquartered in Cork, Ireland, Johnson Controls operates in more than 150 countries, serving a wide array of clients from automotive original equipment manufacturers (OEMs) to aftermarket retailers.

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Quality and reliability are core principles at Johnson Controls AS. The company employs rigorous testing and quality control processes to ensure their products meet the highest standards. With a strong emphasis on innovation, customer service, and sustainability, Johnson Controls AS continues to lead the charge in providing cutting-edge solutions in the evolving automotive landscape. As the industry shifts toward greater electrification and renewable energy sources, Johnson Controls is well-positioned to remain a key player in the market, driving advancements that support both automotive performance and environmental stewardship.
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