Preventative Measures - Danfoss DHP-AX Installation And Service Instructions Manual

14.2

Preventative measures

Some of the following points can also be used when troubleshooting.
D o not install heat pumps on walls adjoining bedrooms.
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E nsure that all pipes are elastically suspended, with mountings as illustrated or similar. This is so that the
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rubber (or similar material) compresses 1–2 mm under vibration. It is not recommended to suspend the
pipes from too many points, as the force at each mounting is then not sufficient.
I f the ceiling of the boiler room is unsuitable for suspending the aforementioned pipe mountings from, set
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up (or construct) special stands on the floor from which the pipes can be suspended.
E nsure that the refrigerant pipes and similar pipes do not lie against walls that they run along and that foam
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insulation is wrapped around the entire pipe, not just on top of it.
P ipes inside the heat pump must not be against each other (if they are, clamp and secure suitable rubber,
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pulling the pipes apart by hand only helps temporarily).
P lace the heat pump on rubber feet or synthetic vibration dampers designed for its weight.
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D o not forget flexible hoses, preferably lengths that enable them to be routed in a loop. If necessary, use
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rubber straps to secure flexible hoses in position, so that they do not lie against each other or create vibra-
tion bridges.
E nsure that electrical wiring is not put under strain, if it is it creates vibration bridges.
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I f possible, prevent placing the heat pump in a cold cellar with hard concrete walls and unsuitable acous-
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tics (test by clapping your hands; if there is a clear echo, the acoustics are unsuitable). The cellar can be
furnished or noise insulated. Check that the air intake for the boiler room is soundproofed to some extent
(damper or similar).
Soundproofing measures to carry out afterwards:
G o through the aforementioned points and improve when possible.
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H ood for compressor (most effective for high frequencies).
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I mprove the acoustic environment by installing acoustic panels on walls and in the ceiling.
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I n some instances, it is recommended to move the heat pump to another room.
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I n rare instances, it may be worth replacing the compressor.
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Figure 33: Example of rubber mounting.
VMBMH302
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Service – 43