MH 4M Operating instructions 107140465 C (09.
1 Symbols used to mark instructions WARNING & Safety instructions in these operating instructions which must be observed to prevent risks to persons are marked with this danger symbol. Before starting up your high- pressure washer for the first time, this safety instruction must be read through carefully. Save the instructions for later use. This symbol marks safety instructions related to connection of the machine to water mains. 2 Safety instructions.
boots, hearing aids and helmets with visor and eye protection • When operating the spray handle, kickback forces are produced at the spraying device and when the spray lance is held at an angle, a torque is also created. The spray handle and spray lance must therefore be held firmly with both hands • Check that cleaning will not result in dangerous substances (e.g.
7 Safety devices Thermal sensor: A thermal sensor protects the motor against overloading. The machine will restart after a few minutes when the thermal sensor has cooled. Unloader valve: Unacceptably high pressure is fed back without residual pressure via a bypass line into the intake line of the pump when the safety device is tripped. The unloader valve is set and sealed at the factory and must not be adjusted. Locking device on spray handle: The spray handle features a locking device.
2 Description 2.1 Purpose This high-pressure cleaner has been designed for professional use. It can be used for cleaning agricultural and construction equipment, stables, vehicles, rusty surfaces, etc. The cleaner has not been approved for cleaning surfaces which comes into contact with food. 2.2 Operating elements At front of these operating instructions.
3 Before starting the cleaner 3.1 3.2 Setting up the cleaner Every fuel-burning appliance, such as pressure washers, depends upon a proper mix of fuel and air (by weight) for proper combustion. Therefore some adjustment of the air regulation to the burner may be necessary to take account of altitude and the resulting air pressure. This is true whether your fuel is ‘Natural gas’, Propane or Diesel.
3.4 Fit clamp for highpressure jet tube1) ø 1. Insert clamp into the holder on the sliding guard: High-pressure jet lance1) clamp Ø 1. 2. 3.5 Fill up detergent tank1) 1. Fill up detergent tank with prediluted detergent. Capacity see chapter 9.4 Technical Data 3.6 Fill up tank for Gerni AntiStone1) 1. Fill up Gerni Anti-Stone/water softener reservoir with the sample bottle1) provided. Gerni Anti-Stone prevents any deposits of scale and acts at the same time as a corrosion inhibitor.
3.8 Fill up fuel tank NOTE! At temperatures below 8° C, the fuel oil begins to solidify (paraffin precipitation). This can lead to difficulties in starting the burner. Before the winter period either add a solidification point / flow improver (available from the fuel oil trade) to the fuel or use winter diesel fuel. (Diesel with a bio diesel content up to 7%). With the machine cold: 1.
1. Rinse the water supply hose briefly in order to prevent sand an other dirt particles entering into the machine. 2. Connect water supply hose to the machine. 3. Open water tap. 3.10 Connecting the water supply NOTE! See chapter 9.4 Technical Data for required quantity of water and water pressure. In order to comply with national regulations and those of the water supply companies, it must be ensured that water cannot flow back if the pressure in the water mains falls below atmospheric pressure.
4 Control / Operation 4.1 Connections 4.1.1 Connecting the spray lance to the spray gun 1. Pull the blue quick-release grip (A) of the spray gun backwards. 2. Insert the nipple of the spray lance (B) into the quickrelease connection and release it. 3. Pull the spray lance (or other accessory) forwards to check that it is securely attached to the spray gun. A B C NOTE! Always remove any dirt from the nipple before connecting the spray lance to the spray gun. 4.2 Switching on the cleaner 4.2.
4.3 Pressure regulation (Tornado Lance)1) 1. Turn the twist grip on the spray unit: – High pressure = clockwise (+) for high pressure – Low pressure = anticlockwise (–) for low pressure. 4.4 Pressure regulation (VarioPress Gun)1) 1. Turn the twist grip on the spray unit: For safety reasons, never tie back or wedge open the trigger of the spray gun in open position during operation. The trigger must be free to close when released, thus interrupting the flow of the water. 4.5 Water volume (–) min.
5.1.1 Soaking Encrusted or thick layers of dirt can be loosened or softened up by a period of soaking. This is for example an ideal method within agriculture – for example, within pig sties. The ideal soaking method can be achieved via use of foam or simple alkaline detergent. Let the product lie on the dirty surfaces for around 30 minutes before pressure washing. The result will be a much quicker high pressure cleaning process. 5.1.
5.2.2 Vehicle Task Accessories Method Vehicle bodywork Standard lance 1. Apply detergent to vehicle or equipment surfaces in Detergent injection order to soften up dirt and grime. Apply from bottom Curved lances and unto top. In cases of particularly dirty vehicles, pre-spray derchassis washers with a product such as Allosil in order to remove traces brushes of insects etc, then rinse at low pressure and apply normal car cleaning detergent.
6 After using the cleaner 6.1 Switching off the cleaner 1. Turn the main switch to position „OFF“. 2. Close water tap. 3. Squeeze the spray gun handle until the cleaner is depressurised. 4. Lock the safety catch on the spray gun. 6.2 Disconnecting supply lines 6.3 Rolling up the electrical cord and storing accessories 6.4 Storing the cleaner (below 0°C (32°F)) AA 1) Options / model variants Original instructions 1. Close water tap. 2.
7 Maintenance 7.1 Maintenance plan Weekly Every six months or 500 operating hours After the first 50 operating hours As required 7.2.1 Water filters 7.2.2 Fuel filter 7.2.3 Checking the pump oil quality 7.2.4 Changing the pump oil 7.2.5 Emptying the fuel oil tank 7.2.6 Flame Sensor 7.2 Maintenance work 7.2.1 Water filters A water filter is fitted on the water inlet to prevent large particles of dirt from entering into the pump. 1. Unscrew quick coupling. 2.
7.2.3 Checking the pump oil quality 1. Check colour of pump oil. If the oil has a grey or white shade, change the oil (see chapter 7.2.4) 2. Top up cold pump with fresh oil if necessary. Oil type see chapter 9.4 Technical Data. 7.2.4 Changing the pump oil 1. Unscrew the oil drain plug (A) on the pump housing and dispose of the old oil in accordance with the disposal regulations. 2. Check the drain plug gasket and screw in the plug again. 3. Fill with oil and close the oil filler plug.
8 Troubleshooting 8.
> Flashing light (alternately) - Motor overheated > • • • 8.2 > - Machine overheated > Contact Gerni Service > Flashing light - Flame sensor sooted - Ignition or fuel system failure > > Clean flame sensor (see chapter 7.2.
9.2 Guarantee Our general conditions of business are applicable with regard to the guarantee. Unauthorised modifications to the appliance, the use of incorrect accessories, spare parts and cleaning chemicals in addition to using the appliance in a way other than for the intended purpose exempt the manufacturer from any liability for the resulting damage. US only: This warranty is in effect from the first day of purchase by the end user. 9.3 EU Declaration of Conformity - - Machines being misused.
9.4 Technical Data MH 4M Descr. Voltage 240 V / 1~ / 50Hz 4M-120/690 4M-190/960 X AU Voltage 400 V / 3~ / 50Hz Fuse Power rating Power consumption AUS A 15 16 kW 3.1 6.1 A 14.8 12.3 IP X5 Type of protection Working pressure bar (Mpa) 110(11) 190(19) Permissible pressure bar (Mpa) 170 250 Volume flow (max) l/h 670 960 Volume flow QIEC l/h 630 900 0450 0500 High pressure nozzle Temperature t max, hotwater °C 90 Temperature t max , steam °C 150 Max.
AUSTRALIA: Nilfisk Pty LTd Unit 1/13 Bessemer Street Blacktown NSW 2148 Phone: 1300 556 710 E-mail: sales@gerni.com.
