Learning Hub

How to Install Mainstation Units

Home / Learning Hub / Open Plant Cleaning / Open Plant Cleaning Equipment / How to Install Mainstation Units

Instructions to read prior to installation

For safety reasons it is important to read the Directions for Use for Hybrid MD, Hybrid MU, and Griff Mainstation  before installation of this equipment. In addition, the legislation in force at the time of purchase must always be considered in connection with the installation and mounting of this equipment.

Directions for Mounting

  • The unit should be mounted in frost-free rooms only.
  • The unit can be mounted on a wall or on a separate frame which may be installed in production areas and anchored to the floor.

For mounting on walls, please note the following:

  • The wall for mounting should be either a stable brick wall or a wall made of concrete.
  • The delivered bracket should be secured to the wall by the enclosed screws and corresponding dowels
  • The wall bracket should be mounted on the wall according to the above description and the station is hung on to the bracket.
  • The hose and User Pack holders should be mounted afterwards.
  • The unit must always be connected to the main supply through a separate service switch.

NB! Installation must always be in accordence with local legislation.

Transportation of Hybrid MU/MD

For secure transportation of the unit, we recommend always to ensure, that the unit can not slide or tip. The unit might have to be secured with straps.

  • Transportation of the unit only in horisontal position: The unit must not be placed on the front where you find the operation panel. Neither can it be placed on top or bottom where connections and outlets are mounted.
  • In case the unit is moved at a temperature of approx or below 0°C (32°F), you must always make sure that the the unit has been fully emptied for water. If this is not the case, you may damage the unit.

Power supply Hybrid MU/MD

Make sure that sufficient power supply is available:

  • 3 phases, 380 to 528Vac 50/60Hz. kW varies depending on number of users from 6kW for 4 users up to 44kW for 32 users
  • Due to the installed frequency inverter the ELCB must be of type B, and have sufficient A (Amps).

Connection instruction is mounted on the cables.

The phase order is subordinated.

Voltage: 3 phases, 380 to 528Vac 50/60Hz
Frequenz: 50/60 Hz
Motor load: 5.5 kW
Nominal current: 14.2 A
Fuse: 20 A
L1, L2, L3, PE 2.5 mm2

Water Connection Hybrid MU/MD

Before the unit is connected to the water supply pipe, the supply line should be rinsed carefully in order to remove coarse impurities and metal shavings.

  • The connection for water must be made at the top of the unit.
  • Minimum internal diameter of the supply pipe must be at least 1 1/4” external (ø36mm internal).
  • The unit must be fitted with a closing valve for water on the inlet.
  • The pressure loss in the supply line must be held as low as possible by
    •    Avoiding long supply pipes
    •    Mounting low pressure resistance ball valves and
    •    Avoiding fittings with high pressure loss.

When installing the piping, take care to avoid air traps.

  • All pipe connections to the unit must be screwed connections ensuring simple maintenance and dismantling of the station.

Max. allowed temperature of supply water:   70°C (158F)

Max. allowed pressure of supply water:         40 bar (580 psi)

Water consumption at rinsing mode:             30 l/min (7.9 gpm).

For an optimum functioning of the injector system, we recommend installing a filter on the inlet to avoid impurities.

  • Always make sure sufficient water supply is available:
  • Boosters and mainstations require a 2 bar (30 psi) dynamic inlet pressure. Not 2 bar (30 psi) against a closed ball valve, but 2 bar (30 psi) when the unit(s) is in operation and using water.
  • The water volume available shall correspond to the number of simultaneous users +10%.


A customer wants a system for 6 simultaneous users, and they shall therefore supply mini­mum;

  • 2 bar (30 psi) dynamic inlet pressure
  • 6x 8 gpm = 181 l/min (48 gpm) + 10% = 196 l/min (52 gpm)

Air Connection Hybrid MU/MD

Before the unit is connected to the air supply, the pipe system must be carefully rinsed in order to remove coarse impurities.

The unit requires an air supply boosting

  •    An inlet pressure of minimum 6 bar (87 psi).
  •    A minimum capacity of 200 l/min. (52 gpm).

The air supply pipe is connected directly with a quick fitting for easy dismantling. In all units an inlet valve with 1/4” thread is fitted.

Make sure that sufficient air supply is available (this applies for installations with mainstations and satellites):

  • Each unit that has an outlet for cleaning requires an air pressure of min. 5.9 bar (87 psi) to make foam
  • It is important that the compressor has sufficient volume as well so that we ensure enough air to generate nice thick foam. Each outlet requires 5,3 cfm.


A customer wants a system for 6 simultaneous users, and they shall therefore supply min.;

  • 5.9 bar (87 psi) air pressure
  • 6x 5,3 cfm = 32 cfm

Chemical supply Mainstation MU/MD


Main Station with User Pack System

  • Place the specially designed User Pack in the automatic holder.
  • If changing to a different product when ending the cleaning process, rinse the product inlet line with clean water as follows:
  • Replace the User Pack containing product by one with clean water; place the foam nozzle and open the spray gun/outlet valve.

The product inlet line is now rinsed with clean water before use of another product.

Supply of Detergent

Main Station without User Pack System.

  • Place the can with detergent in the can holder
  • Check the suction filter for impurities.
  • Put the suction hose into the can below product level and avoid suction of air.
  • After pre-rinsing, check again that the hose is sufficiently below product level and avoid suction of air during foam or spray operation.
  • After use of and when changing product as well as after use of the unit, remove the hose from the can and rinse the product inlet line and injector with clean water.

Installation & mounting drawing Hybrid MU/MD

Hybrid MU421/422


Hybrid MD


Piping Guideline

To transfer the pressure (energy) from mainstations to the satellites without too much pressure loss, it is important to engage with the customers preferred contractor to secure sufficient pipe diameter. The less pressure loss we can have, the more energy we are able to transfer onto the surfaces that are to be cleaned. More mechanical impact on the surfaces = faster and better cleaning. Side effects are a reduction in labor, energy, and water while improving microbiology.

engineered-to-run (1)