6 720 680 174 (2014/05)Therm 8000S
Installation instructions | 35
Note: Do not count terminals and first elbow used on intake and
exhaust.
8.6.2 Calculation of the concentric conducts length Ø80/
125 mm
How to calculate the total length of the concentric conducts:
▶ Determine the total length of the concentric conducts and
enter in Table 21 , line 1.
▶ Count the number of 90° elbows used, multiply by 2m, and
enter that value in Table 21 , line 2.
▶ Count the number of 45° elbows used, multiply by 1.5m,
and enter that value in Table 21 , line 3.
▶ Count the number of 30° elbows used, multiply by 0.4m,
and enter that value in Table 21 , line 4.
Example
Concentric conduct:
• 4 units of 1m straight sections
• 1 unit of 1m straight section
– Total length = 5 meters
• 2 - 90° elbows
Example table:
Note: Do not count terminal and first elbow.
8.6.3 Adjusting fan speed
After obtaining the total sum of the conducts, proceed as
follow:
▶ Press ON/OFF button into OFF.
▶ Press and hold "Program" button and press ON/OFF button
to turn appliance ON (see Fig. 54).
Fig. 54
▶ As soon as '188' is displayed, release "Program" button
, and the display should read P2.
▶ Press one time to access the program P2. In the LCD
display is visible the attributed value (factory value: 12).
▶ Press or to choose the fan speed suitable with
your installation, see tab.23 for separate tubes admission/
exhaust Ø 80/80mm or Table 24 for concentric conducts
Ø 80/125 mm.
▶Press and hold ( 5 sec.) “Program” button until the
display flashes.
selected value is memorized.
Intake
1 Straight section length _4_ x 1= 4
290° elbows (qty) _1_ x 1 = 1
345° elbows (qty) _0_ x 0.5 = 0
430° elbows (qty) _0_ x 0.4 = 0
5Sub-total: 5
6 Total equivalent vent length= 12
Table 20
Total maximum length for separate tubes
(exhaust/admission) must not exceed 16
meters.
Do not count terminals and first elbow.
Concentric conducts
1 Straight section length ___ x 1 = ________
290° elbows (qty) ___x 2 = ________
345° elbows (qty) ___x 1.5 = ________
430° elbows (qty) ___x 0.7 = ________
4 Total equivalent vent length= ________
Table 21
Concentric conducts
1 Straight section length 5 x 1 = 5
290° elbow (qty) _1_ x 2 = 2
345° elbow (qty) _0_ x 1.5 = 0
430° elbow (qty) _0_ x 0.5 = 0
5Sub-total: 7
Table 22
Total maximum length for concentric conduts
must not exceed 8 meters.
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