Desmi H Series Operation And Maintenance Instructions

Contents

Desmi H Series Operation And Maintenance Instructions Manual pdf 9 page image

______________________________________________________________________________DESMI Pumping Technology A/S 9Tagholm 19400 Nørresundby – DenmarkTel: +45 96 32 81 11 Fax: +45 98 17 54 99E-mail: desmi@desmi.comwww.desmi.com7. FROST PROTECTIONPumps which are not in operation during frost periods are to be drained to avoid frost damage.Remove the plug at the bottom to empty the pump. Alternatively, it is possible to use anti-freeze liquids in normal constructions.8. DISMANTLINGBefore dismantling the pump make sure that it has stopped. Empty the pump ofliquid before it is dismantled from the piping system. If the pump has beenpumping dangerous liquids you are to be aware of this and take the necessarysafety measures.If the pump has been pumping hot liquids, take great care that it is drained beforeit is removed from the piping system.9. START-UPA centrifugal pump will not function until it has been filled with liquid between thefoot valve and somewhat above the impeller of the pump.The liquid also serves as coolant for the shaft seal. In order to protect the shaft seal the pumpmust not run dry.ATTENTIONFor safety reasons the pump is only allowed to operate against closed suction and dischargevalves for a short time (max. 5-10 minutes and at a max. temperature of 130°C). Otherwisethere is a risk of damage to the pump and, at worst, of a steam explosion. If the pump roomis unmanned, the installation of a safety device is recommended.9.1 STARTINGBefore starting the pump check that:- the shaft rotates freely without jarring sounds.- the pump casing and the suction line are filled with liquid.Start the pump for a moment to check the direction of rotation. If the direction is correct (i.e.in the direction of the arrow) the pump may be started.