Rothenberger ROFROST Turbo II R290 1.1/4 Instrucciones De Uso página 21

 Position the freezing system in such a way that the equipment ventilator motor does not
blow onto the pipes to be frozen, as they must be protected against warm air.
The fitted ventilator sucks in the air that is required for the liquefaction of the cooling agent and
cooling the compressor on the long side of the equipment and presses it out again on the top
side.
 Hold the refrigerating clamps upright and switch the system on for about 5 minutes so that
any oil that may still possibly be in the refrigerating clamps can back into the circuit. Switch
on by operating the rocker switch.
Caution: During the freezing process make sure that all the
air grilles are not blocked as proper air circulation must be
guaranteed!
The ROFROST Turbo II R290 is a "contact freezing unit". The function of the unit can only be
guaranteed if there is proper heat-conducting contact between the refrigerating clamps and the
pipes that are to be frozen. Paint and contamination in the application range of the tongs will ex-
tend freezing times; ideally, the pipe to be frozen should be metallic bright.
 Only apply the refrigerating clamps to the straight pipe sections. Badly distorted or out-of-
centre pipes are not suitable for freezing.
4.2 Application and replacement of the tools
The refrigerating clamps are designed for pipes with an exterior diameter of:
ROFROST Turbo II R290 1.1/4": 42 mm / 1¼" respectively
ROFROST Turbo II R290 2":
Special reducing inserts are required in order to also be able to freeze pipes of a smaller diame-
ter (see ill. A or B).
 Spread heat-conducting paste generously on the contact surfaces between the refrigerating
tongs, reducing inserts and pipes to avoid insulation bridges (see ill. C-1).
Caution: Heat-conducting paste must be used for optimum
performance! Important information: The refrigerating
clamps and pipes must be protected against draughts dur-
ing the freezing process!
 Handle the reducing inserts and refrigerating tongs with care. Clean them with a dry cloth af-
ter use and store them in the lining provided to protect them against damage.
4.3 Operating
The ROFROST Turbo II R290 is a compact ready-to-plug unit. It works with a hermitical com-
pression refrigerating system. Troublefree continuous operation for hours or days is possible
under supervision and within the prescribed ambient temperature range and voltage / frequency
in accordance with the technical data.
The simple clamping system of the refrigerating clamps ensures safe connection to the pipe.
 Press the clamp together with the appropriate insert onto the pipe to be frozen and tighten
by means of the fastening screw (see ill. C-2).
Caution: Only tighten the fastening screw by hand!
 Remove superfluous heat-conducting paste!
We recommend greasing the screw as this makes it easier to release the refrigerating tongs af-
ter the freezing process!
Important information: During the freezing process a temperature difference between display
(L) and display (R) is possible. As a rule, however, this is compensated for in the minus range.
Furthermore, exterior factors can also play a part, e.g:
– Different output temperatures of the respective pipes due for freezing,
– Different pipe diameters,
54 mm / 2" respectively.
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