vonRoll hydro HYPLUS Montageanleitung Seite 20

Check-list for installation
and operation
1. Pressure test
After the connection of the fire-hydrant to the drinking-water mains,
a pressure test should be carried out before filling in. After the mains
pressure test has been carried out, a functional test should be made.
2. Open valves
The top cover and the covers on the side of the hydrant should be
removed. Then, by slowly opening the main valve (middle spindle), any
residual matter resulting from installation work can be washed out. Af-
terwards, the main valve should be closed and checked for tightness.
If any leakage is noted, it is recommended that rinsing be repeated in
order to remove any foreign material possibly still trapped.
3. Drainage
In order to check drainage for tightness, the side valve should now be
opened three turns. The fire-hydrant should now automatically drain
(perceptible vacuum at the ventilation holes in the covers).
4. Fill in around the fire-hydrant
After checking-out the water mains connection, the filling-in around the
fire-hydrant can be begun. A gravel bed must be provided up to and
above the flange joint between the inlet bend and the riser pipe.
Depending on the composition of the ground (bushes and trees
nearby?), it is recommended that the fire-hydrants be protected against
root infiltration by, for example, embedding in a concrete pipe. In order to
provide the fire-hydrant with a secure footing, excavated material should
be compacted in layer by layer.
min.
350
min. 750
500
120°
500