Table of Contents
Advertisement
INITIAL FLUSHING PROCEDURE (WATER ONLY STAGE, BEFORE ADDITION OF CHEMICALS)
Note: In the following procedure, the pump is first
used to loosen and mobilise loose silt and debris,
before forcibly expelling it together with the existing
heavily contaminated system water. This rids the
system of as much debris and sludge at an early stage,
before establishing full, chemically treated circulation
through the flushing pump.
By removing loose corrosion products from the
system before addition of any chemical, the full effect
of the chemical is available to disturb, loosen, and
dissolve more stubborn accumulations of debris.
1. Leave the pump tank cap loose, or on by no more than
one turn if water splashes whilst flushing / descaling
(to allow gas to escape).
2. Check that both valves are closed (horizontal). Open
the isolating valves between flushing pump and
heating system and switch on pump immediately.
Ensure that liquid level in tank remains above the
minimum mark, adding more water if necessary.
3. Allow the flushing pump to run for ten minutes,
reversing the direction of flow regularly. If there is
sludge and debris in the system, the water returning
into the tank will be heavily discoloured as the high
flow rate picks up looser debris.
Issue: May 2023
4. Check all hoses and connections for leaks.
5. The pump has the ability to dump dirty water with the
5a. Operate the flow reverser lever so that the water is
5b. Rotate the valve on the return side through 180° so
5c.The mains water inlet supply (orange tap) should now
Section B – Using the Clearflow pump
flow in either direction.
Change the pump into dumping mode as follows,
remembering that the flow reverser is constructed so
that the direction in which the lever points also
indicates the direction of flow.
flowing through the heating system in the same
direction as it is during normal heating operation.
that the dump label is clearly visible.
By doing this, system water is diverted to waste down
the dump hose, instead of returning back into the
tank. The liquid level in the tank will immediately
begin to fall.
be turned on and adjusted so that the volume of
incoming water compensates for that being forced
out of the system to waste. Continue dumping until
the waste water runs relatively clear. Ensure that the
water level in the tank remains above the minimum
mark at all times.
Note: If the mains water cannot keep up with the
dump speed (i.e. the unit begins to empty) stop
dumping until the tank fills up.
Continued on next page.
Page B.4
Advertisement
Table of Contents
