General safety instructions
DANGERObserve the high pressure levels of the refrigerant R744!
At standstill the pressure in the system will rise and there is a risk of bursting!
Install pressure relief valves on the compressor and on the suction and high-pressure sides in system sections that are lockable from both sides.
Requirements and design according to EN 378-2 and EN 13136.
Critical temperature 31.06°C corresponds to 73.84 bar.
DANGER
Liquid R744 evaporates quickly, cools down at the same time and forms dry ice!
Danger of cold burns and frost bites!
Avoid uncontrolled deflating of R744!
When filling the system with R744, wear gloves and goggles!
All transcritical Bitzer R744 compressors are equipped with an optional pressure relief valve to the atmosphere on the high-pressure side and on the low-pressure side as well.
However, they do not replace the safety valves of the system (EN 12693)!
Make sure that the pressure relief valves can freely vent to the atmosphere.
Do not mount any pipes near the outlet of the pressure relief valve!
DANGERRisk of bursting of components and pipes due to excess hydraulic pressure.
Vessel and pipes may burst, small components may shoot out. The pressure wave may be lethal.
Never charge blocked components and pipes completely with liquid or leave them charged. Leave sufficient volume above the liquids.
Mounting
DANGERRisk of bursting the pressure equipment due to mechanical stress.
Serious injuries are possible.
Connect the pipes to the pressure equipment without load and stress!
DANGERRisk of bursting of components and pipes due to liquid overpressure.
Serious injuries are possible.
Make sure not to exceed maximum admissible pressures!
For work on the pressure equipment after having put the system into operation
CAUTION
Surface temperatures of more than 60°C or below 0°C.
Risk of burns or frostbite.
Close off accessible areas and mark them.
Before performing any work on the pressure equipment: switch off the system and let it cool down or warm up.
Before performing any work on the refrigerating circuit
WARNING
The pressure equipment is under pressure!
Serious injuries are possible!
Depressurise the pressure equipment!
Wear safety goggles!
CAUTIONRefrigerant can be very cold
Risk of severe frostbite.
Avoid any contact with the refrigerant. Wear cold-protective gloves.