nvent Raychem HWAT-ECO V4, Руководство пользователя

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tapes. Increasing insulation thickness, better insulating materials and/
or smaller pipe sizes generally results in higher temperatures as the
heat losses decrease. Decreasing insulation thickness, less insulating
materials or bigger pipe sizes results in lower temperatures as the heat
losses increase.
The HWAT-ECO internal data is based on standard sets of values for pipe
size and insulation characteristics. Any deviations from these standard
sets will result in a deviation from the target temperatures. The unit
compensates for this by using the ‘Power Correction Factor’.
Pipe / Insulation combination
The country code must be entered in order to refer to an insulation
thickness typical used in a concerned country.
Two groups of countries depending on insulation thickness
(See table in 5.1)
The HWAT-ECO assumes a default 25 mm pipe diameter (‘Quick Install’).
It is recommended to use the appropriate insulation type in case another
pipe size is needed, otherwise bigger temperature deviations may occur.
Installations with varying pipe diameters
If the HWAT circuit is maintaining a piping system comprising different
pipe sizes (and assuming similar insulation materials and appropriate
thickness), a compromise pipe size should be selected:
• Thinner pipes will run hotter, thicker pipes will run cooler if average
pipe size is selected.
• The minimum pipe size should be selected if the maximum
temperature should be limited (for safeguarding against scalding).
• Thinner pipes will run hotter if maximum pipe size is selected.
Installations with deviating pipe size – insulation combinations (Fig. 9)
In case different combinations of pipe size and insulation dimensions
are used, it is possible to compensate for temperature deviations by
using the ‘Power Correction Factor’. (See page 17, chapter 3.2 Setup,
Power corr.) This factor is able to compensate for up to a few degrees.
Lowering the factor (down to 60%) will decrease the temperature,
increasing the factor (up to 140%) will increase the temperature. As the
‘Power Correction Factor’ can compensate for only a few degrees, it
is not advised to use pipe size – insulation type combinations varying
appreciably from the combinations given in the table below.
Note: Increasing the ‘Power Correction Factor’ does not result in
further temperature increase when the HWAT-ECO is set to maintain
temperatures close to the maximum temperatures achievable with a
given heating cable type.