Installing The Condensation Return Tubing; Checks - Carel heaterSteam User Manual

Depending on the position of the steam distributor, the course of the tubing may be one of the following:
1. upwards with a vertical section at least 300mm in length, followed by a bend with a minimum radius of 300mm, and finally
a downward section with a constant slope of not less than 5° (see Fig. 8.6.2);
2. for very short courses (less than 2 metres), a bend with a minimum radius of 300mm followed by from an upward section
with a slope of not less than 20° (see Fig. 8.6.3).
IMPORTANT WARNING: the recommended length of the steam conveyance tubing is less than 4m.

8.7 Installing the condensation return tubing

Due to the re-condensation of part of the steam produced, condensation forms in the steam conveyance tubing and inside the
distributor which must be drained to avoid gurgling and loss of efficiency.
The condensation is drained by the effect of gravity with the help of flexible tubing suitable for this purpose. The use of
incorrect tubing can lead to fragility and cracks and consequent steam leaks.
To avoid the non-condensed steam from being released through the condensation tubing, a trap must be created by curling a
part of the drain tubing.
The end of the condensation tubing can be connected to the nearest drain tube, with a minimum slope of 5° to assist the
discharge (see Fig. 8.6.2).
If the distance of the distributor allows, the tubing can be connected to the special connection C, supplied, to be screwed onto
the top of the humidifier, allowing condensation to be drained directly into the boiler fill tank (see Fig. 8.6.3).
IMPORTANT WARNING: for correct functioning, the trap must be filled with water before starting the humidifier.

8.8 Checks

The following conditions represent the correct installation of the steam tubing:
the position of the steam distributor conforms to that described in this chapter, the steam outlet tubing points upwards and
the distributor is inclined at least 2° upwards;
the ends of the tubing are fastened with metal screw clamps;
the bends in the tubing are quite wide (radius > 300mm) so as not to cause pinching or choking;
there are no pockets or traps in the steam tubing to avoid condensation;
the courses of the steam tubing and the condensation tubing conform to those described in this chapter;
the length of the steam tubing does not exceed 4 metres;
the slope of the steam tubing is sufficient to drag the condensation (> 20° for the upward sections, > 5° for the downward
sections);
the slope of the condensation tubing is at least 5° at each point;
the condensation tubing features a trap (filled with water before start-up) to avoid the release of steam.
Carel code +030221761
> 5°
> 5°
R > 300
H 2 m
D > 200
Fig. 8.6.2
> 20°
> 5°
D > 200
R > 300
Fig. 8.6.3
28
preliminary version - rel. 2.0 - 03/09/99
heaterSteam
C