Specification - Brands of Watford

Calming troubled waters
Calflush Chemical Cleaner
Specification
MODEL:
CALFLUSH
Powerflush machine for chemically cleaning
heating systems
Due to Calmag's commitment to new product development the photographs contained within these instructions may depict earlier
product models - Calmag reserve the right to alter specification without prior notification - please contact Calmag technical services
on 01535 210320 (option 2). © 2009 Calmag

Calflush Chemical Cleaner
Introduction:
Calmag have many years experience in the industrial
heating and water treatment industry, working in conjunction with a number
of heating engineers who possess Powerflushing equipment. Together we
have evolved a faster, cheaper, more effective method of cleaning domestic
systems, using experience gained from large scale industrial heating and
cooling systems and trials with heating engineers.
The Current Problem:
It is well known that there are two major
contributors to the fouling of heating systems:1) Scale- this mainly forms in
the heat exchanger but is rarely found in the radiators or pipes unless the
circulatory water is above 73 degrees Celsius. For this reason, it is not
usually necessary to use an acid based cleaner in the radiators. 2)
Sludges- these are commonly referred to as ‘magnetite’ which can be
present in radiators and even in parts of pumps. There seems to be a link
between noisy pumps and the presence of sludge, so removing the sludge
tends to quieten the pumps. The problem with the traditional powerflushing
method is that it attempts to remove the sludge through the use of force,
one radiator at a time. This can be time consuming, often ineffective and
disturbs all the radiator settings in the process.
The Calmag Solution:
For dirty systems, we have found that a combination
of the products is a quick, efficient and economical method of
Powerflushing. By cleaning all radiators in one loop, customers are now
Powerflushing in a round two hours.
Major Benefits:
* Can reduce Powerflushing time considerably.
* Does not leave any cold spots.
* Quietens boilers and pumps.
* Only requires setting up the Powerflush
machine once.
* Cleans even heavily silted systems.
* The faster more efficive way to clean central
heating systems using a combination of three
products and cleaning all radiators in one loop.

Calming troubled waters
Sludge and Flux Remover
Sludge and Flux Remover cleans and neutralises flux
residues debris, oil and grease from new and old
systems, as well as flocculating magnetite sludges
and particulate residues, to facilitate their easy
removal with a Powerflush machine. Sludge and Flux
Remover is suitable for use with all components.
It will not harm aluminium and requires no
neutralisation. This product can remove light rust and
helps descale and soften water.
Silt Free
Silt Free is a flocculent blend that is typically used
to shift deposits of silt, mud and sand etc from open
drains. Silt Free gives the silt particles buoyancy in
water and by imparting a small charge on individual
paticles causing them to repel each other. Material
treated with Silt Free will not form a solid mass
again. This enables the silt and sludge content of
heating systems to be more easily removed with
Powerflushing.
Powerflush Descaler
Powerflush Descaler loosens and dissolves corrosion
deposits, limescale and ironoxides typically found in
heating systems with circulation and heat transfer
problems. Note: All these products are ‘water
neutralised’ but if time is an issue, use an acid
neutraliser on the Powerflush Descaler for faster
results.
The contents of the Powerflush pack are sufficient
to Powerflush two average domestic heating
systems, each at 10 radiators.

Calflush Chemical Cleaner
How It Works....
The Sludge and Flux Remover and Silt Free is
added to the whole system (boiler and radiators)
to begin the break up of the magnetite and sludge,
which usually contains a mix of oil, dirt and scale.
As the Sludge and Flux Remover frees up these
deposits, the Silt Free acts as a flocculent to keep
the particles in suspension until they are flushed
out of the system. The Silt Free works by imparting
a small charge on individual paticles causing them
repel each other. The polymer nature of the
product also gives the particles additional
buoyancy in water, so when there is water flow
they go in to suspension and are easily flushed out.
Once deposits of sludge, silt, sand and mud have
been treated with Silt Free, they cannot reform
into a solid mass whilst in the water.
* We recommend after the powerflush process is
complete, using Calchem as the inhibitor or any
other approved inhibitor.

Calming troubled waters
Preparation Before Powerflushing
* Isolate the cold water supply and electrical supply to the heating system.
* Manually close any automatic air vents.
* For open vented systems, drain the header tank completely and either
cap-off or join together, the open vent and expansion/cold feed pipes.
* Mark, or make a note, of the position of the lockshield valves (this will
assist in the quick re-balancing of the system upon completion), adjust to
the fully open position and remove any thermostatic radiator valve (TRV)
heads. This will ensure maximum flow through the valves.
* Set any zone or diverter valves to the manual open position, where
applicable.
* Anti-gravity and non-return valves should be bridged, or temporarily
removed.
Powerflushing Procedure
a. Ensure that the 2 valves are in the closed position. Connect the mains
water supply to the CalFlush unit and fit the overflow hose to the unit.
(Note: Hose without a fitting is for the overflow and inlet).
b. Fit the pipe with one fitting to the dump connection and feed into a foul
drain.
c. Connect the CalFlush unit to the system and fill the tank with fresh clean
water to the maximum level mark.
d. Plug the CalFlush unit into a standard electrical socket.
e. Open both isolator valves to the circulate position and ensure that all
radiator valves are fully open.
f. Unscrew the tank cap and leave open.
g. Turn on the pump and begin to flush the system for a minimum of 10
minutes, reversing the flow through the unit on a regular basis via
the flow reverser handle.
h. Keep a check on the water level in the tank. If this level drops below the
minimum mark, top up with fresh clean water.

Calflush Chemical Cleaner
i. Open the water inlet tap to fill the tank with fresh clean water and open
one dump valve only. Note, if the flow reverse handle is pointing to
the left, open the left hand dump valve. DO NOT LET THE TANK EMPTY.
To keep a constant level of water in the tank, the dump valve should be
closed slowly until an equilibrium has been achieved.
j. When the water is seen to be clean running to drain, turn off the water
inlet and dump valve.
k. Add 1 litre of Sludge & Flux Remover (per 10 radiators) to the tank and
circulate around the system for approximately 10 minutes, again changing
the flow direction on a regular basis.
l. Add approximately 150ml of Silt Free to the tank and circulate for a
further 15 minutes. If possible, heat the system to approximately 30
degrees Celsius.
m. Turn off boiler.
Note: Each radiator is recommended to be flushed individually throughout
the system. This will ensure the full removal of contaminants.
n. Repeat process i to empty the system completely of the cleaning solution
and refill the system with fresh clean water.
o. When the system is full with fresh clean water turn off the pump and
close both isolator valves.
p. Isolate the radiators as this will ensure that the Powerflush Descaler will
only circulate around the primary loop to the heat exchanger. Leave last
radiator on system open to form loop.
q. Add approximately 500ml of Powerflush Descaler to the tank, open both
isolator valves, and start the pump. The Powerflush Descaler should
be pumped around the system for a minimum of 30 minutes, again
changing the flow direction on a regular basis.
r. Repeat process i to empty the system completely. A book of pH papers
will give results of the acid content of the water after flushing. A pH level
of 7, or slightly above is acceptable. If the pH is below 7, continue
dumping and refilling the system, as above, with fresh clean water until
the pH reading is achieved.

Calming troubled waters
s. After flushing the primary loop, and achieving the desired pH level, turn
off the water inlet and dump valve. Turn off the pump and isolator valves.
t. Open all radiators fully.
u. Add 1 litre of CalChem inhibitor (per 10 radiators), or any other approved
inhibitor, to the tank and open the isolator valves and start pump to
circulate the CalChem inhibitor around the system for approximately 20
minutes, changing the flow direction on a regular basis.
v. The Powerflush and inhibiting process is now complete.
w. Please note that the inhibitor may need to be topped up on an annual
basis. Levels of the CalChem inhibitor can be checked by use of a Calmag
Refractometer - please call for additional details.
x. Note. If a new boiler is being installed, powerflush the system prior to the
boiler installation if possible.

Telephone: 01535 210320
Fax: 01535 210321
E mail: sales@calmagltd.com
Website: www.calmagltd.com
Calming troubled waters
Calmag, Units 3-6, Crown Works,
Bradford Road, Sandbeds, Keighley,
West Yorkshire BD20 5LN