Insulation Treatment - Haier MRV II Instruction Manual

connection part is negative (cassette, ceiling concealed type) ,please
install a water return pipe for drain pipe.
6.6 Test the drain pipe after installation. Seal the water outlet of drain pan
and charge water to 2/3 part. Check the drain pan two hours later, if
there is no leakage, open the water outlet to ensure if the water drainage
is fluent and if the drain pipe connection is tight.

7 Insulation treatment

7.1 If the insulating layer of condensing water pipe is made of rubber, its
thickness should be over 10mm.
7.2 If the insulating layer of refrigerant pipe is rubber pad insulation pipe,
its thickness should be over 15mm, if the material of insulation layer is
fiberglass, the thickness should be over 20mm.
7.3 To do the refrigerant pipe insulation work , the straight pipe should be
done firstly, for the welding joint and the others that can be done after
checking work, then finish all the insulation work.
7.4 The gas pipe and liquid pipe should be treated separately
7.5 The joint of insulating material should be glued to ensure there is no
gap, wrap insulating material with adhesive tape, be not too tight and no
sense of looseness.
7.6 The pipe inside the ceiling needs not to be wrapped if unnecessary,
only stick the control cable with adhesive tape on the outer of insulating
layer, for R410A system, please refer to the below picture:
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Part 1