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hoses to the T-distributor. Screw on the handle piece with injector nozzle
to the high-pressure hoses (Fig. 1). Choose freeze collars which corres -
pond to the size of the pipe to be frozen. Place the freeze collars on the
pipe and secure by tightening the screws evenly to give a firm but not over-
tight hold (Fig. 2). Turn and, at the same time, push each handle piece with
injector nozzle into the bore of the freeze collar until it is completely inser-
ted and resting against the stop (Fig. 3).
If one only operates with one collar, the free side of the T-distributor has to
be closed by the closing nut. If a 3. or further freezing points are required,
additional T-distributors (accessory) can be connected to the T-distributor.
3. Operation
The water (or other liquid) in the pipe can only be frozen when it is no longer
flowing. All pumps must therefore be stopped and no liquid removed or
allowed to escape from the pipe. Before freezing, let the water cool down
to room temperature.
Fully open the cylinder valve. The amount of carbon dioxide required is
controlled automatically. The liquid carbon dioxide expands in the injector
and forms dry ice with a temperature of –79°C and freezes the water wit-
hin the pipe. After a brief period, frost will form on the pipe in the vicinity of
the freeze collars. If frost does not form in accordance with time given in
the table, then this indicates that the liquid within the pipe is still flowing
(check that all pumps have been switched off and prevent any removal or
outflow of water) or the water is too warm. While work is in progress, the
flow of carbon dioxide refrigerant must be maintained. Always ensure a
sufficient supply of refrigerant by providing a stand-by cylinder.
The only way to determine the amount of remaining carbon dioxide is to
weigh the cylinder.
If it is necessary to change the cylinder during work, it is essential that this
procedure should be complete within 7 minutes to prevent the ice pack
from melting.
Once work is complete, close the cylinder valve and wait until the pressu-
re in the high-pressure hoses has returned to normal. Remove the high-
pressure hoses. Once the ice pack has completely melted, carefully un-
screw and remove the handle pieces with injector from the freeze collar
and remove the freeze collar.
4. Freezing Times
The freezing times and carbon dioxide requirements given in the table be-
low are only to be regarded as general guidelines and are valid for a wa-
ter temperature of approx. 20°C. The freezing times and refrigerant con-
sumption values will therefore vary for higher temperatures. For freezing
liquids in plastic pipes much longer freezing times are generally required.
Table:
Freeze collar
Material
Freezing Carbon dioxide Number of freezing
size
time
1
/
"/10/12 mm
steel
1 min
8
copper
1 min
1
/
"/
15 mm
steel
1 min
4
copper
2 min
3
/
"/
18 mm
steel
2 min
8
copper
3 min
1
/
"/
22 mm
steel
3 min
2
copper
5 min
3
/
"/
28 mm
steel
5 min
4
copper
7 min
1" /
35 mm
steel
7 min
copper
10 min
1
1
/
"/ 42 mm
steel
11 min
4
copper
14 min
1
1
/
"
steel
16 min
2
54 mm
copper
24 min
2" /
60 mm
steel
29 min
* Does not include work time
consumption
operations possible
per freeze collar
per 10 kg cylinder*
60 g
165
65 g
160
75 g
130
135 g
75
150 g
65
200 g
50
225 g
45
330 g
30
350 g
29
450 g
22
500 g
20
650 g
15
700 g
15
900 g
11
1050 g
10
1450 g
7
1900 g
5
5. Procedure in Case of Trouble
Fault:
Frost does not form on the pipe.
Cause:
• Freezing time still too short. Pay attention to freezing times
according table.
• Pumps not switched off, outflow of water.
• Carbon dioxide cylinder is empty or cylinder valve is not open.
• Choke in cylinder connector with T-distributor is blocked up.
• Filter in front of injector nozzle blocked up. Unscrew injector
nozzle, push filter carefully from the back through the handle
piece, clean filter (blow out).
6. Manufacturer's Warranty
The warranty period shall be 12 months from delivery of the new pro-
duct to the first user but shall be a maximum of 24 months after delivery
to the Dealer. The date of delivery shall be documented by the submis-
sion of the original purchase documents, which must include the date
of purchase and the designation of the product. All functional defects
occurring within the warranty period, which clearly the consequence of
defects in production or materials, will be remedied free of charge. The
remedy of defects shall not extend or renew the guarantee period for
the product. Damage attributable to natural wear and tear, incorrect
treatment or misuse, failure to observe the operational instructions, un-
suitable operating materials, excessive demand, use for unauthorized
purposes, interventions by the Customer or a third party or other rea-
sons, for which ROLLER is not responsible, shall be excluded from the
warranty.
Services under the warranty may only be provided by customer ser vice
stations authorized for this purpose by ROLLER. Complaints will only
be accepted if the product is returned to a customer service station autho -
rized by ROLLER without prior interference in an unassembled condi -
tion. Replaced products and parts shall become the property of ROLLER.
The user shall be responsible for the cost of shipping and returning the
product.
The legal rights of users, in particular the right to claim damages from
the Dealer, shall not be affected. This manufacturer's warranty shall
apply only to new products purchased in the European Union, in Nor-
way or Switzerland.
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