English (GB)
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Safety warning - electrical hazards
Before carrying out any form of inspection, maintenance or repair
work on the system, operators must carry out tests to ensure that
the plant has been satisfactorily isolated.
Safety warning - hydrogen gas
The electrolytic process of converting brine into sodium
hypochlorite generates hydrogen gas which is vented to a safe
external location through the degassing assembly via
dual-contained pipework. The equipment should be regularly
checked to ensure that no gas leakages occur.
There should be natural ventilation at a high and a low level in the
room where the electrochlorinator is installed. A sign prohibiting
smoking and naked flames should be displayed within the room
and at the point of discharge to the exterior.
If required, a hydrogen detector can be fitted within the plant
room to stop the Selcoperm system in the unlikely event of a
build-up of hydrogen gas. This will also prevent the situation of an
operator working in a potentially explosive environment.
Safety warning - hydrochloric acid
Hydrochloric acid is used to remove deposits from the electrodes
(acid cleaning).
• If splashed onto skin, wash off with fresh water. Remove all
affected clothing.
• If the eyes are affected, rinse them immediately using an
approved eye shower or fresh running water for at least 15
minutes, keeping the eyelid open and rotating the eye. Seek
medical treatment immediately.
• If swallowed, do not induce vomiting. Keep the patient warm
and quiet and seek immediate medical help. If the patient
stops breathing, apply rescue breaths and cardiopulmonary
resuscitation as necessary, until medical help arrives.
Rinse out all residual sodium hypochlorite from the system before
filling with acid. Make sure the system is flushed well with water
before restarting it.
Safety warning - brine
Salt is safe to handle, but eyes should be rinsed with fresh
running water if subjected to brine splashes.
Personal protective equipment
Due to the range of hazardous chemicals any information
provided in this section is only general. It is the duty of the
operator to ensure that he has obtained information on all safety
precautions relevant to the type of task he is undertaking, and to
ensure that they are adhered to. Grundfos recommends to follow
good practice when handling chemicals, and to use personal
protective equipment such as ventilated, enclosed goggles, face
shields, chemical aprons, boots and gloves. An eye shower may
also be advisable.
2. Product description
2.1 Components
2.1.1 Selcoperm electrochlorinator
The electrochlorinater includes:
• A water softener to facilitate a water supply of the correct
specification to the brine tank for providing the brine solution,
and also to the electrolyser cell for dilution of the brine solution
to the correct specific gravity (SG). The softener is water
powered.
• A brine pump to dose the brine solution into the softened water
line to the electrolyser cell.
• An electrolyser cell to convert the brine solution and softened
water into a sodium hypochlorite solution of up to 0.65 %.
• A control panel to facilitate the low voltage/high current DC
supply used in electrolysis.
• Operating elements monitoring and controlling the generation
of sodium hypochlorite.
• An electrical fan system to dilute the hydrogen gas generated,
and to force the ventilation of the gas to a safe external
discharge point.
2.1.2 External components
The external components include:
• A brine tank providing a saturated brine solution.
The saturated brine is mixed with soft water for electrolysis,
and used for regeneration of the water softener.
• A product tank designed to store the sodium hypochlorite
solution. This tank provides the buffer storage facility from
which dosing can take place.
Warning
Danger of explosion!
When checking the equipment for leakages only use
hydrogen detectors!
Never use a match or any type of flame!
Warning
Wear the stipulated personal protective equipment
(protective clothing, goggles, respirator etc.) when
handling chemicals.
Observe the chemical manufacturer's safety data
sheets (MSDS) and safety instructions of the used
chemicals.
Warning
If acid is mixed with sodium hypochlorite solution,
highly hazardous chlorine gas is released.
Keep acid away from the sodium hypochlorite
solution and the tank.
Display a warning notice locally.
