Comet XRCA-3023-WA, Руководство пользователя, Страница: 14 / 56

Safety
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2.3.4. Exclusion criteria
NOTE
Operating personnel
Operating personnel are only allowed to operate the unit. They are neither allowed to open the unit
chassis, remove parts, connect or disconnect power or coolant fluids nor to do maintenance
Persons allowed to operate and to maintain the unit must not be under the influence of intoxicating
substances (e.g. alcohol, drugs or medicine).
2.4. Personal protective gear
Wearing the personal protective gear is required when handling the unit to minimize the health
hazards.
The following personal protective gear must always be worn when handling the unit:
Protective footwear
For the protection against heavy parts falling down and from slipping on slip-
pery surface.
When performing cleaning, maintenance or repair work on the unit, the following specific personal
protective gear is required:
Protective gloves
To protect the hands from rubbing, abrasions, cuts or more profound injuries,
as well as when touching possibly hot coolant.
Protective eyewear
To protect the eyes against parts flying around or splashing of coolant.
2.5. Safety and signaling equipment included in the unit
The unit is equipped with the following safety equipment (see Figure 1):

The maximum pump pressure is limited by a pressure relief valve that returns the
coolant stream back into the coolant tank, when the pre-set pressure is exceeded.

The coolant temperature is monitored by a thermostat. When the coolant temperature
exceeds the maximum set point this is indicated by the potential-free safety circuit.

The circulated coolant amount is monitored by a flow switch that has to be integrated
in the potential-free safety circuit of the device that is to be cooled.

The frost control temperature controller prevents freezing of the coolant fluid (anti-
freeze protection).

The refrigerant circular flow is protected by a high pressure switch (press stat).

The level of the coolant in the system is monitored by a level guard.
The unit is equipped with the following signals:

In case of insufficient coolant the regulator will turn off the unit and the warning light
„Water level low“ will appear.

In case the coolant level in the coolant tank is too low, the warning light „Coolant level
low“ will appears. The unit will then be turned off and an error signal will be sent via
the potential-free safety circuit.