Unical HP_OWER ONE 70R - Page 29

28
Measurement
Completed
Notes
8
Repairs on sealed connectors
■ During operations on sealed components, completely isolate the
device from the power supply, before removing the sealed covers.
■ If, during operations, the power supply is absolutely necessary:
Position a continuously operating refrigerant detector in the most
critical places, so that it emits a warning signal in case of potentially
dangerous situations.
■ Pay particular attention that any operation on the electrical
components does not entail changes to the connectors which could
influence their protective properties. These include damage to the
feet; too many connections to a single terminal; connections that
do not correspond to the manufacturer's specifications; damage to
seals; and incorrect installation of the cable entries.
■ Make sure the device is installed correctly.
■ Verify that the seals are secured in place. Check to make sure that
the seals effectively prevent the entry of a flammable atmosphere.
Replace defective seals
Please note that
Used as a sealant, silicone can affect
on devices for detecting leaks.
Do not use silicone as a sealant.
■ Spare parts must comply with the manufacturer's specifications.
■ Work on components suitable for flammable atmospheres: It is
not imperative that these components are isolated from the power
supply.
9
Repair operations on components suitable for flammable atmospheres
■
Do not connect any capacitive or continuous inductive loads to the
device unless you have made sure not to exceed the all
owable voltage
and current.
■
In areas with flammable atmospheres, apply voltage only to
components suitable for fl
ammable atmospheres.
■
Use only original or approved parts. In the event of a leak, the use of
other parts may result in the ignition of the
refrigerant.
10
Wiring
■
Check that the electrical connection is not subject to wear, corrosion,
tension, vibrat
ion, sharp edges or other unfavorable environmental
conditions.
■
When checking, also take into account the effects of time and
continuous vibrati
ons on the compressor and fans.
11
■
Refrigerant detectors
■ Do not, for any reason, use possible sources of ignition to detect
any leaks or leaks of refrigerant.
■ Leak detection lamps or other open flame detectors must not be
used.