Mitsubishi Electric CLIMAVENETA Series General Manual For Installation page 30

C0210101-07-16-EN
Supplementary maintenance.
The salient feature of the coating is the fact that it can be reapplied.
Solid particles (like sand) can enter from the side of the coil where air flows in, and erode the corrosion protection exposing the metal. Should this
happen, the surface coating must be reapplied. Reapplication should be carried out by qualified personnel.
The coating can be reapplied several times during the useful life of the coil.
Normally, good routine maintenance reduces the need for supplementary maintenance.
Procedure for cleaning "bare" micro-channel coils
Micro-channel tube & fin coils tend to accumulate dirt more on the outside and less on the inside, and are, therefore, easier to clean.
As a minimum requirement, the coils must be inspected and cleaned on an quarterly basis after initial commissioning. The frequency of
inspections should be increased in the case of aggressive weather conditions or a high degree of dirt.
Follow the instructions below on how to clean the coils properly:
Remove all traces of dirt on the surface. Remove any deposits like leaves, fibres, etc. using a vacuum cleaner (or, if necessary, a
a.
brush or other soft accessory, making sure not to scratch and damage the metal parts). If using compressed air, always blow this from
the inside outwards (the air should flow in the direction opposite that during normal operation). In this case, too, be careful not to scratch
the coil with the hose or nozzle of the compressed air gun.
Rinse. Rinse only with water. Do not use chemical substances (including special detergents for finned coils). These
b.
substances can cause corrosion. Rinse preferably from the inside outwards, aiming the jet perpendicularly to the face of the coil and
allowing the water to flow in each passage of the fins until these are perfectly clean. These fins are sturdier than those of conventional
coils but should still be handled with care. Avoid hitting the coil with the hose. It is advisable to put a thumb on the end of the hose to
adjust the pressure of the jet of water, rather than use nozzles that could knock against the coil and damage it. Gently blow out any
residual water at the centre of the fins.
Attention!
Do not use high pressure cleaners to clean the coil as excessive pressure can cause irreparable damage. Damage caused by cleaning with
chemical substances or excessive water pressure is not covered by the guarantee.
Attention!
Make sure to always wear appropriate PPE to avoid cuts and abrasions. Protect the eyes and face against the spraying of water and dirt
during the cleaning process. Wear waterproof shoes or boots and clothes that cover all the body.
Procedure for cleaning "e-coated" micro-channel coils
The cleaning procedures below are recommended and should be carried out as part of routine maintenance for e-coated coils. A record of all
routine cleaning of the coils must be kept in accordance with the terms and conditions of the guarantee provided by the supplier of the e-coating
treatment.
Follow the instructions below on how to clean the coils properly:
Remove all traces of dirt on the surface. Remove any deposits like leaves, fibres, etc. using a vacuum cleaner (or, if necessary, a
a.
brush or other soft accessory, making sure not to scratch and damage the metal parts). If using compressed air, blow this from the inside
outwards (the air should flow in the direction opposite that during normal operation). In this case, too, be careful not to scratch the coil
with the hose or nozzle of the compressed air gun.
Routine cleaning. In coastal or industrial areas, the coil must be rinsed on a monthly basis using just water to remove chlorides, dirt and
b.
debris. It is important to use water at a temperature below 45°C and at a pressure below 40 bar to reduce surface tension and thereby
facilitate the removal of dirt and chlorides without damaging the coil. Do not use chemical substances (including special detergents for
finned coils). These substances can cause corrosion. Rinse preferably from the inside outwards, aiming the jet perpendicularly to the
face of the coil and allowing the water to flow in each passage of the fins until these are perfectly clean. These fins are sturdier than
those of conventional coils but should still be handled with care. Avoid hitting the coil with the hose. It is advisable to put a thumb on the
end of the hose to adjust the pressure of the jet of water, rather than use nozzles that could knock against the coil and damage it. Gently
blow out any residual water at the centre of the fins.
Quarterly cleaning. Quarterly cleaning is required under the terms of the guarantee and can extend the useful life of the e-coated coil.
c.
Failure to perform quarterly cleaning renders the guarantee null and void and can reduce the performance and life-span of the coil.
Follow the instructions below on routine quarterly cleaning:
III. First clean the coil using the approved type of detergent (refer to the list of approved products further on).
IV.
soluble salts and revitalises the unit. This product must be applied directly on the salts in order for it to be effective. The salts
may be under a layer of grease or dirt. It is essential, therefore, to clean the surfaces thoroughly with detergent before applying
the product. Apply a sufficient amount of CHLOR * RID DTS ™ in a uniform manner all over the surface of the coil. Make sure
to coat the surface thoroughly without leaving any gaps. The product can be applied using a spray pump or a standard spray
gun. When the surface has been completely wetted, the salts are made soluble. Lastly, rinse the surface with water as
instructed in the section "b. routine cleaning".
Approved detergent for e-coated coils.
The following detergent has been approved for use on e-coated coils to remove mould, dust, soot, traces of grease, fluff and other particles,
providing that it is used in compliance with the manufacturer's instructions on mixing and cleaning:
Product
Enviro-Coil Concentrate
Enviro-Coil Concentrate
Next, use the approved product to remove chloride (CHLOR * RID DTS ™). Treatment with this product eliminates
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