6 720 800 095 (2014/05)
Therm 6000S
32 | Installation instructions
8.6 Fan speed adjustment
Before adjusting the fan speed it is necessary to verify the
admission / exhaustion system, ca
lculating the total length of
the exhaust pipes and quantity of elbows.
Pressure drop equivalence of the conducts and exhaustion
accessories.
8.6.1 Total equivalent vent length calculation Ø80 mm
How to calculate the total length of the exhaust conduct:
Determine the total length of all straight sections of vent
pipe and enter in Table 16, line 1.
Count the number of 90° elbo
ws used, multiply by 1m, and
enter that value in Table 16, line 2. (Do not count non-
concentric terminals and first elbow used on intake and
exhaust ).
Count the number of 45° el
bows used, multiply by 0.5m,
and enter that value in Table 16, line 3.
Count the number of 30° el
bows used, multiply by 0.4m,
and enter that value in Table 16, line 4.
Repeat the previous procedure to calculate the total length
of the admission of air conduct. Insert values in Table 17.
Sum the total of the Table 16 with the total of the Table 17
and to put the result in the line 6 of the Table 17.
This is the total equi
valent vent length.
Example
Exhaust:
•
5 units of 1m straight sections
•
1 unit of 1m straight sections
– Total length = 6 meters
•
2 - 90° elbows
Intake:
•
4 units of 1m straight sections
– Total length = 5 meters
•
2 - 90° elbows
Example table:
After installing the appliance, the minimum
power fan speed must be adjusted to
compensate for variation in vent pipe length.
Equivalence in meters
Description
Ø80/80mm
30° elbow
0.4m
45° elbow
0.5m
90° elbow
1m
exhaust pipe per meter
1m
Horizontal vent kit
-
Table 15
Do not count non-concentric terminals and
first elbow used on intake and exhaust.
Exhaust
1
Straight section length ___ x 1 =
________
2
90° elbows (qty)
___x 1 =
________
3
45° elbows (qty)
___x 0.5 =
________
4
30° elbows (qty)
___x 0.4 =
________
_
_
_
_
_
_
_
_
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Table 16
Intake
1
Straight section length ___ x 1 =
________
2
90° elbows (qty)
___x 1 =
________
3
45° elbows (qty)
___x 0.5 =
________
4
30° elbows (qty)
___x 0.4 =
________
_
_
_
_
_
_
_
_
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6
Total equivalent vent length=
________
Table 17
Exhaust
1
Straight section length 6 x 1 =
6
2
90° elbows (qty)
_1_ x 1 =
1
3
45° elbows (qty)
_0_ x 0.5 =
0
4
30° elbows (qty)
_0_ x 0.4 =
0
7
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Table 18
