RIDGID KJ-3100 - Manual (Page 12)

KJ-2200/KJ-3100 Water Jetting Machines
10
Fill the tank prior to starting the jetter. When starting
jetter, turn the tank valve off. As soon as the jetter is
started, open the tank valve. Monitor the tank water
level, and if needed, stop jetting to allow the tank to
refill. Do not allow the water level to fall below the hose
end.
Hot water can be used for improved cleaning. Do not
use water hotter than 140°F / 60°C – this can cause the
pump thermal overload to open. When using hot wa-
ter, use appropriate personal protective equipment to
reduce the risk of burns.
When using in cold weather, use precautions to pre-
vent water from freezing in the pump. This can dam-
age the pump.
Make sure that the inlet supply valve on the jetter is
closed and attach the supply hose to the jetter.
Drain Preparation
If working through a manhole, storm grate or other
large access, use pipe and fittings to create a guide for
the jetter hose from the drain opening to operation
point. This will prevent the jetter hose from whipping
around in the access and protect the hose from dam-
age.
Figure 10 – Extending the Drain Opening to the Operation
Point
Hose Set-Up
Use care when routing jetter hoses. Routing hoses over
rough surfaces, sharp edges, crossing hoses, etc. can
damage the hose jacket, especially when the jetter is
used in the pulse mode. Keeping the jetter hose on the
reel will help to minimize hose damage.
1. Select a jetter hose size appropriate for the drain
being cleaned. It is not generally recommended
to connect two jetter hoses together for cleaning
drains. The connection between the two hoses is
less flexible and can prevent passage through fit-
tings See Jetter Hose Selection Chart.
2. As needed, separate the hose reel from the mot or/
pump assembly. Locate the hose reel within 3 feet /
90 cm of the drain opening. Do not allow excessive
amounts of hose outside of the drain to prevent
hose damage. If the hose reel cannot be placed
within 3 feet / 90 cm of the drain opening, extend
the drain opening back to the hose reel with similar
sized pipe and fittings.
3. Route a hose from the jetter to the IN fitting on the
foot valve. Use teflon tape to seal the connection.
Position the foot valve for accessibility. You must be
able to control the jetter hose and the foot valve.
4. Connect the hose from the reel to the OUT fitting on
the foot valve.
Figure 11 – Foot Valve Connection
In Fitting
Out Fitting
5. Mark the jetter hose near the end to indicate when
the nozzle is getting close to the drain opening
when withdrawn. This will help prevent the nozzle
from coming out of the drain and whipping around.
The distance depends on the configuration of the
drain, but should be at least 4’ / 1,2 m.
6. Remove the nozzle from the end of the jetter hose
and place the end of the jetter hose in the drain.
Open the inlet supply valve to purge the air and any
debris from the jetter and hoses. Allow water to flow
for at least 2 minutes.
7. Close the inlet supply valve.
8. Select a nozzle. Use nozzles specifically sized for the
jetter being used. Using incorrect nozzles can cause
poor performance (low operating pressure or low
flow) or may damage the jetter with excessively high