Honeywell Xtralis FAAST FLEX FLX-010 Product Manual page 68

FAAST FLEX Product Guide
Piping Design "U" pipe - Dual Channel (FLX-020):
FLX-020 U-pipe network, Class C with In-line filter
Example:
Without Exhaust pipe (E), T-junction 1m (T), Branch of 40m (B1), First hole at 20m (F), 6 holes
1. Verification of project constraints and determination of aspirator speed
N Number of holes
E Exhaust pipe
T T-junction position
B1 Branch length
F First hole Branch 1 with low speed
with high aspirator speed
PL Pipe length with
high aspirator speed
L1 Last hole position, Branch 1
2. Calculate nominal step between holes and hole position deviation form nominal
S1 = L1 / ( Number of holes – 1 ) = 20 / 5 = 4 m (≥2.5m)
± 0.2*4m = ±0.8m
3. Determination of necessary Sensitivity Level
and the hole diameters
4 4 4
61
Required Rules
6 See Table
0m See Table row C
1m See Table row A
10m
20m
1.25 ÷ 18m (19-1)
1.25 ÷ 29m (30-1)
40+1+0=41m ≤ 65 m
41-1-20=20m
Number of Branch Holes
Aspirator speed, max 65m for H and 45m for L
A
- Maximum T-Junc on Distance (meters)
l
3
B
- Maximum First Hole Distance (meters)
C
- Maximum Exhaust Pipe Length (meters)
Alarm Level Class C with/without filter
Alarm Level Class B with/without filter
Alarm Level Class A without filter only
1 2 3 4
H/L H/L H/L H/L H/L
15/15 15/15 15/15 15/15 15/15
30/30 30/30 30/30 30/27 30/23
14/14 14/14 14/14 14/14 14/14
Low Medium Medium High High
High High High High
High
- - -
FAAST FLEX
1
5 6
H/L
2
15/15
30/19
3
14/14
High
- -
4 4 4
- -
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