GAYLORD XG-BDL, Installation Operation & Maintenance

Page: 17 / 36

14
System Testing
Prior to testing the hoods performance all make up air registers,
should be noted, and measured for airflow, equipment should be in
the push back position, as close as possible to the rear wall. Any
doors, or cross drafts in the vicinity of the hood’s should be noted,
and lastly and lastly, all observations, and values need to be recorded
and provided to Gaylord Industries for safe keeping.
GFBD (%) DSD (in)
100 4 1/16
90 3 7/8
80 2 15/16
70 2 1/8
60 1 1/2
50 15/16
40 3/8
BDL Hood DS-CL Hood
SP Tap CFM / LF SP Tap CFM / LF
0.07 100 0.10 200
0.10 120 0.12 240
0.15 150 0.15 280
0.19 170 0.17 300
0.23 190 0.21 340
0.28 210 0.25 380
0.30 220 0.34 440
0.36 240 0.37 460
0.43 265 *Values need to be
multiplied by the hood
section overall length to
get the total CFM.
0.55 300
0.63 320
0.75 350
GBD / GFDB Flow Characteristion Chart
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
0.00 1.00 2.00 3.00 4.00
DSD, (Damper Set Position) (Measured Center Opening Dimension, inches)
SP
Add
er
t
o
P
le
nu
m
P
ress
u
re
, (W
C)
SP adder (1500 FPM)
SP adder (1800 FPM)
18
00
FP
M
15
00
FP
M
Gaylord Balancing
Damper
Chart will indicate the DSD as it relates to the dial adjuster for
GFBD models only.
Static Pressure
Tap
Access to Static
Pressure Tap
FIGURE 18
Static Pressure Tap (UV Hood)
FIGURE 20
Damper Set Position Chart
FIGURE 21
Airflow Chart
FIGURE 19
GFBD Correlation Chart
MEASURING AIRFLOW