10
11..
Connect the 350mm long water hose (8) on DDM2 - 230 to a suitable water supply
by push fitting into a “Gardena” or “Hozelock” type fitting which is attached to a
hose pipe. The hose pipe could be typically between 5m - 20m in length.
22..
Turn on water supply.
33..
Turn on tap on the water hose so that a steady flow of water cools the segments on
the core.
Do not exceed the recommended maximum water pressure of 2 bar.
The hose (8) should always be checked that is in a satisfactory condition
before use and is not split and does not leak water. DO NOT USE IF THE
HOSE IS LEAKING WATER OR IS DAMAGED.
A minimal flow of water direct to the core segments & material helps cool the drilling
area & improve drilling performance.
Keep water away from the parts of the tool & away from persons in the
working area.
Always test the correct operation of the RCD before starting work.
If the plug or supply cable needs replacing then take the DDM2 - 230 to your
nearest Marcrist Distributor.
CCoonnnneeccttiioonn ttoo wwaatteerr ssuuppppllyy ffoorr hhaanndd hheelldd wweett ddrriilllliinngg
.
Certain very hard materials such as reinforced concrete can present problems for dry
drilling. They may cause excessive heat & consequent polishing (blunting) of the
diamond segment on the core.
This can result in poor drilling performance and can be overcome by connection of a
suitable water supply onto the hose of the DDM2 - 230 machine using a “Gardena” or
“Hozelock” type fitting as shown in the diagram below.
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