Manntek DCC - Making Connection;Disconnection; Improper Use

Operating Manual
PR-050823-0121 Version 161109 12 of 14
5.4 M AKING CONNECTION / DISCONNECTION
Rotate the hose unit clockwise about 100 degrees whilst gently pushing towards
the tank unit. At the start of rotation you will feel some resistance. The level of
resistance is dependent upon the static line and tank pressure. The higher the
pressure the greater is the effort necessary to connect the coupling. At the
completion of the 100 degree turn you will feel a definite stop.
Further rotation does not tighten the connection or open the valves more, it only causes unnecessary
damage. The hose unit valve is now open and the loading process can start.
The sequence of isolation valve and/or pump operation should be taken from your operating procedures.
The disconnection procedure is similar to the connection procedure but in reverse. Closing the vehicle
isolation valve first is preferred so long as this is compatible with your standard operating procedures. The
most regulations are recommending boiling off the line from liquid and maybe purging the line with an inert
gas if flammable liquids have been handled.
Whilst supporting the hose unit assembly, turn the hose unit anti-clockwise approximately 100 degrees. You
may feel a slight “pop off” effect at the end of the rotation travel when transferring liquids with an elevated
vapour pressure. This is normal. Do not attempt to rotate the hose unit further. This will not further loosen the
connection or secure the seal, it only causes unnecessary damage.
After disconnection the plug shall always be fitted to the hose unit and the cap to the tank unit
immediately. This avoids moisture inside the connection interface. Condense water is a risk for
ice building during the next loading operation, which can cause a leakage or blocking the
interface connection after cooling down.
The hose assembly should be stowed in a manner so as to avoid physical damage. Do not drop the hose
end assembly or stow on the floor.
5.5 I MPROPER USE
The equipment should never be used in the case of visible damage or where there is prior knowledge of
damage that may lead to malfunction.