GRE Comfort Heat AR2094 Manuel D'instructions page 28

TECHNICAL MANUAL. START-UP AND OPERATION
B. Failures
- Any intervention in the refrigeration circuit must be made following the applicable safety regulations: recovery of refrigeration fluids,
nitrogen welds, etc.
- Any welding intervention must be made by qualified welders.
- For units loaded with R410A, refer to specific instructions in the user manual.
- Piping can only be replaced by copper pipes according to standard NF EN 12735-I.
- Search for leaks:
a. Never use oxygen or dry air, danger of fire or explosion.
b. Use dry nitrogen or the mixture of nitrogen and coolant indicated in the plate. - Any substitution of parts different
to the ones considered by the manufacturer, any modifications in the refrigeration circuit, any substitution of refrigeration fluid by a
fluid different to the one indicated in the plate or any use of the unit beyond the limits specified in the unit documentation
would result in the cancellation of the guarantee. - All information must be registered in the unit manual that must be included
in the installation project.
C. R410A Gas
- The R410A liquid, unlike the R22, is not a pure liquid, but a compound mixed. The compressors approved to work with this liquid
are specific and are preloaded with polyol ester oil.
- This oil, unlike mineral oil, is very hygroscopic and it very quickly absorbs the ambient air humidity, something that can strongly
alter its lubricating abilities and lead in due time to the destruction of the compressor.
D. Maintenance instructions
- Never add oil to the unit; the compressor is loaded with specific oil, polyol ester (POE) that does not tolerate the presence of other
types of oil.
- The instruments used for the load, pressure measurement, creation of a vacuum and recovery of the liquid must be compatible
and be only used for the R410A liquid.
- The weight of the coolant contained in the storage deposit must be constantly verified. If the remaining weight is lower than 10%
of the gross weight, do not use it.
- In the event of a new charge:
· Do not use the load cylinder
· Use a balance and a bottle of R410A with an immersion tube
· Load the weight of R410A following the value indicated in the plate where the characteristics of the unit are specified.
- The load must be done in liquid phase.
- In case of leaks, do not complete the load: recover the remaining liquid for its recycling and carry out a full load again. The reco
very, recycling or destruction of liquid should always be carried out in accordance with the applicable laws in each country.
- If the refrigeration circuit is open, the following tasks must be carried out:
· Minimize the entrance of ambient air in the circuit
· Replace the dehydrator.
· Carry out the "creation of a vacuum" to a minimum level of 0.3 mbar (static).
3. PRECAUTIONS FOR USE AND CONDITIONS OF USE
A. Safety instructions
Read the safety instructions prior to any manipulation:
Any incorrect manipulation may cause an important risk that could involve deadly injuries.
Any incorrect manipulation may cause serious damages to the user and the unit.
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ATTENTION
WARNING