NEUTRALISES
CORROSIVE FLUX RESIDUES
PREVENTS
CORROSION & PIN HOLING
DISSOLVES
GREASE & OILY CONTAMINATION
MOBILISES
INSTALLATION DEBRIS
NO
NEUTRALISATION REQUIRED
New
and modified heating systems invariably contain installation
debris and foulants such as residues of solder fluxes,
jointing compounds, copper swarf, oil and grease,
and even casting sand from within boiler heat exchangers.
In
order to prevent future pin-holing of radiators, and
corrosion problems, it is important to thoroughly flush
new heating systems with SYSTEM PRE-CLEAN. It is a specifically
formulated neutral cleaning product which eliminates and
neutralises installation debris, and conditions and prepares
metal surfaces of new and modified heating systems.
Application & usage:
1
litre of SYSTEM PRE-CLEAN is sufficient to treat a
typical central heating system of 100 litres capacity
(approx. 10 radiators). For larger systems, treat at
a dosage rate of 1% of system volume.
If
the system is new or empty, fill with water after adding
the SYSTEM PRE-CLEAN to the feed and expansion tank.
In the case of modifications to an existing system,
with water present, add SYSTEM PRE-CLEAN to the f & e
tank after isolating water supply and draining off
15 litres (3 gallons) of water. Allow system to refill
completely.
Alternatively,
SYSTEM PRE-CLEAN may be injected directly into a radiator,
using a suitable device.
The
heating system should be operated for at least an hour,
with all radiator and zone valves fully open. It is
not necessary that the system be hot during the operation,
although temperature will generally improve the efficiency
of the operation.
Switch
off the pump and boiler, allow the system to drain
down as rapidly as possible, preferably through a full-bore
drain point, and refill the system completely.
Switch
pump on, and circulate water for a further 15 minutes.
Open the drain valve, and run water to waste at the
same time as fresh water enters the system through the
f & e
tank, with the circulating pump still operating, until
the waste water runs clear.
Close
the drain valve, and allow the system to refill completely,
bleeding radiators where necessary.
SYSTEMSAFE-DM scale
and corrosion inhibitor should be added to the system
after the operation to prevent scaling and corrosion.
