D R Y S I R E N
U s e r ´ s a n d i n s t a l l a t i o n m a n u a l
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P a g e 4 3 o f 6 8
V e r s i o n : 0 1 / 2 0 1 8
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When cutting the pipes and cables, please mind the following:
1. Measure the distance between the water and the condensing unit.
2. Cut the pipes a little longer than measured distance.
3. Cut the cable 1.5m longer than the pipe length.
Pressure test / Air purging / Filling the refrigerant
Sometimes bits of air and moisture remains in the refrigerant circuit. If this is not treated, following
symptoms may appear on DRY SIREN:
1.
Pressure in the system rises.
2.
Operating current rises.
3.
Dehumidification efficiency drops.
4.
Blockage of Electronic expansion valve due to frozen moisture resulting in complete failure of
the unit.
5.
Corrosion of refrigerant circuit.
It is thus highly advised to take a leak test after evacuating the complete system. Leak test can be
performed with usual methods using manifold valve and/or soap water. Air purging can be
performed by most commonly applied methods with vacuum pump. This Installation and user
manual elaborates vacuum pump method.
Air purging with vacuum pump / Filling the refrigerant
1.
Preparation
CORRECT
INCORRECT
Even
Slanted
Uneven
Rough
Smooth, shiny without scratches
Same length all around
INCORRECT FLARING
Inclined / Surface damaged / Cracked / Uneven
thickness
