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2 Safety and disposal
Refrigerant gases can harm the environment.
- Please note the applicable environmental regulations.
Explosion hazard when using A2, A2L and A3 refrigerants
During maintenance and repair work on refrigeration systems with flammable
refrigerants (e.g. category A2L, A2 and A3 of ISO 817), a hazardous and
explosive atmosphere must always be expected in the immediate vicinity of the
system. The testo 570s may only be operated outside of designated,
recognizable or assumed explosion hazard zones (acc. to IEC 60079-10-1).
The following occupational safety measures must be observed to avoid a
hazardous explosive atmosphere (see also: TRBS 1112, TRBS 2152 and VDMA
24020-3):
•
Wear protective goggles and gloves.
•
Before applying pressure to the measuring instrument: Always attach the
measuring instrument to the suspension device to prevent it from falling
down (risk of breakage).
•
Before each measurement, check that the refrigerant hoses are intact and
correctly connected.
Do not use any tools to connect the hoses, only hand-tighten the hoses
(max. torque 5.0 N∙m / 3.7 ft∙lb).
•
Adhere to the permissible measuring range (-1...60 bar/-14.7...870 psi).
Pay particular attention to this for systems with refrigerant R744, as these
are often operated at higher pressures!
•
Open and close valves on the unit in the correct sequence to prevent any
leakage of refrigerant from the system throughout the commissioning,
maintenance and repair period.
8
VORSICHT
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