Davey RVM Series Operating Instructions Manual

Contents

Davey RVM Series Operating Instructions Manual Manual pdf 7 page image

7If the installation is subject to electrical power surges or lightning we strongly recommend the use of suitable additionalsurge protection devices on ALL electrical equipment.In accordance with AS 3350.2.41 we are obliged to inform you that this appliance is not intended for use by youngchildren or infirm persons unless they have been adequately supervised by a responsible person to ensure that they canuse the appliance safely.PIPE CONNECTIONSFor best performance use pipes at least the same diameter as the pump’s inlet and delivery outlet opening. Largerdiameter pipe may be used to minimise resistance to flow when pumping longer distances.Use unions at pipe connections to enable easy removal and servicing. Use sufficient tape to ensure an airtight seal butdon’t over tighten. To prevent strain on pump threads always support heavy inlet and outlet pipes. If there is a likelihoodthat the water supply may contain solid particles such as pieces of plant or vegetable matter, a suction strainer should beinstalled before the pump to avoid blocking of pump. Lay suction pipe at a constant gradient to avoid air pockets whichmay reduce pump efficiency.WHERE TO USE CHECK VALVES AND FOOT VALVESA check valve is required for fitting to installations with flooded or positive suction. Care should be taken to ensure that itis correctly installed in the suction line for installations with flooded or positive suction.Installations with flooded suction require a gate valve so water supply can be turned off for pump removal and servicing.On installations with a suction lift a good quality foot valve with strainer is required. It is not recommended to fit both a footvalve and the check valve in a suction lift installation.FOR AUTOMATIC PRESSURE PUMPS INSTALLED WITH A MAINS PRESSUREHOT WATER SYSTEMTo protect your system from damage caused by back pressure from hot water systems, you should always have installedon the hot water inlet an approved non-return valve.CONNECTION OF MAINS SCHEME OR TOWN WATER SUPPLY TO EITHERSUCTION OR DISCHARGE OF PUMPMost Water Supply Authorities have strict regulations regarding direct connection of pumps to mains water supplies. Inmost cases an isolating storage tank is required between mains supply and pump — Davey also recommend this method.Directly applied mains pressure can exceed pump operating pressure and damage pump.Davey Water Products Pty. Ltd. cannot accept responsibility for loss or damage resulting from incorrect orunauthorised installations.PRIMING AND OPERATION1. After installing pump set shut the discharge gate valve2. Fill pump, suction line and discharge assembly with water via the priming ports. On flooded suction simply opensuction gate valve to the pump set. When full, fit priming plugs and hand tighten firmly.3. Ensure an outlet nearest to the pump is open.4. Ensure all valves in the suction line are open.5. Switch pump on and partially (2 turns) open the discharge gate valve.6. Prime should be established almost immediately and a strong flow of water should be evident from the outlet. Allowwater to flow for approximately 20 seconds to expel air.7. If little or no flow is evident from the outlet, switch pump off at the power point and repeat from step 1 ensuring thatthere is adequate supply of water available to the pump.8. Once water flow has been achieved, shut the discharge gate valve. The pump should slowly build up pressure (on thegauge) and turn off at the appropriate cut-out pressure.9. Check the pressure switch settings by opening and closing the discharge gate valve slowly and reading pressure onthe pressure gauge. Adjust if necessary. Refer section on pressure switch.10. To prime the discharge pipework, partially open discharge gate valve (4 turns) and then systematically open & closeall outlets on the system to expel the air within the discharge pipework.NOTE: Suction leaks are the largest cause of poor pump performance and are difficult to detect.Ensure all connections are completely sealed using thread.NOTE: Young children should be supervised to ensure that they do not play with the appliance.Abrasive MaterialsThe pumping of abrasive materials will cause damage to the pressure system which will then not becovered by the guarantee.