Installation Instructions
 Installation and Service Manual Upsilon-Series 
26
The appliance produces a white wisp of condensation (pluming). This wisp of condensation 
is harmless, but can be unattractive, particularly in the case of outlets in outside walls.
At  this  time  there  are  2  different  ways  of  connecting  the  ue  gas/air  intake  system, 
parallel or concentric. See chapter 7.1 and 7.2 how to convert the boiler connection to 
the desired option.
ø100mm
A
inm
UB70 Maximumstraightlength100 63
87° bend resistance length  -1,8
45° bend resistance length  -0,9
UB110 Maximumstraightlength100 35
87° bend resistance length  -1,8
45° bend resistance length  -0,9
UB140 Maximumstraightlength100 12
87° bend resistance length  -1,8
45° bend resistance length  -0,9
ø100/150mm
B
inm
UB70 Maximumstraightlength100/150 25
87° bend resistance length  -2,6
45° bend resistance length  -1,1
UB110 Maximumstraightlength100/150 15
87° bend resistance length  -2,6
45° bend resistance length  -1,1
UB140 Maximumstraightlength100/150 8
87° bend resistance length  -2,6
45° bend resistance length  -1,1
Parallelfluesystem
Concentricfluesystem
Maximum ue length for individual ue gas outlet             table 7.4.b
100/150 = 350mm
Dismantlement and shorten pipes          gure 7.4.b
Example:
  An UB 70 with a 
concentric ue gas system 
ø100/150mm has according 
to the table a maximum ue 
straight length of 25m In the 
system that is going to be put 
in there are 2 x 45° bends, so 
the maximum ue gas length 
is 
25 – ( 2 x -1.1 ) = 22.8 
meters.
Cutting the concentric pipe goes as follows:
-  Take out the inner tube by turning it until it releases from its security position;
-  Cut just as much from the air intake part as from the ue gas part;
-  Take off the burrs from the cutting edge to prevent cutting the seals;
-  Click the pipes back together again.
  Use special grease to simplify the tting
When mounting the ue gas system, pay attention to the ow direction. An arrow on the 
product points this out. It is not permitted to mount a system upside down and will lead 
to complaints.
Refer to table 7.4.b for maximum applicable pipe length. 










