13
13
MEASURING AIRFLOW
Measuring Airflow (Single Section)
The method will require a manometer, (Dwyer 475-00 FM recom-
mended), to be used to take your measurements. After obtaining
your measurement the value(s) are to be compared to the label-
ed value displayed on the reverse side of the pressure tap access
panel. See Figure 18 below. Multiple section balancing will require
per. All measurements
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Most GBD and GFBD dampers will be factory preset if conditions
Instructions (Single Section Measurement):
Turn on the exhaust fan to the hood section you intend to
1.
Remove access cover as seen in Figure 17.
2.
Locate the static tap, and remove the sealing boot.
3.
Zero you Dwyer 475-00 Digital Manometer.
4.
Take the 1/8” vinyl tube attached to your Dwyer 475-00 Digital
5.
Manometer and attach it to the static tap.
Record the value indicated on your meter.
6.
7.
8.
values will be noted on the hood’s listing label attached to the
inside of the ventilator, and a sticker attached to the inside of the
access cover. See Figure 18.
10% high.
Measuring Airflow (Multiple Section)
During the course of the start up the Gaylord Industries representative
or balancer will have to balance all hoods common to a single fan
simultaneously. This process will require knowledge of the ducting,
and a little technique. Prior to starting the process the Balancer will
have to verify the preset on all GBD and/or GFBD Dampers.
To Preset the Gaylord Industries balancing dampers, the balancer will
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This can be done by obtaining a set of the design drawings for each
hood Gaylord Industries provides. After obtaining both the main trunk
static pressure common to all hoods on that fan you will need to
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For example: If you have 1.00” WC at the duct collar but only 0.23
inches of static in your hood’s plenum. The balancing damper will
have to be adjusted to make up the difference; in this case it will have
to make up 0.77 inches of static pressure, 1.00 WC – 0.23 WC = 0.77
WC. The difference between the collar and plenum pressure, 0.77
inside distance between the two center blades, in this example it is
1 5/8” for hoods with 1500 FPM duct velocities, and 2 5/8” for duct
velocities running at 1800 FPM. The dimension is called the DSD,
balancing process. Typically the “DSD” will be factory preset. GFBD
correlation between the DSD, and the potentiometer dial.
FIGURE 17
Static Pressure Tap
step in the
.
The ELX hood has been designed to give you an approximate air-
flow per linear foot of hood based on the static pressure measured
at each section. The static tap, as seen below in Figure 17, will be
located behind a small 4 to 6 screw access cover.
Adjust Blades to
Change Airflow
rates at each
Hood Section
Pressure Tap
Access Here
Confirm all Extractors
are Clean and in Place
should be taken with the equipment off.
Values not in spec shall be reported to Gaylord.
FIGURE 18
Pressure Tap Label
Содержание ELX SERIES
Страница 12: ...9 9 GFBD INTERNAL WIRING SINGLE SECTION FIGURE 16 GFBD GEBD Internal Wiring Diagram ...
Страница 13: ...10 10 GFBD EXTERNAL WIRING MULTIPLE SECTION FIGURE 16B GFBD External Wiring Diagram ...
Страница 25: ...22 20142 20143 20163 20139 20140 19289 20144 76047 UV MODULE PARTS ...
Страница 26: ...23 UV HOOD WIRING BOARD SCHEMATIC ...
Страница 28: ...25 ELX GBD OR ND NO UV WIRING DIAGRAM ...
Страница 29: ...26 ELX GFBD NO UV WIRING DIAGRAM ...
Страница 30: ...27 ELX UV GBD ND WIRING DIAGRAM ...
Страница 31: ...28 ELX UV GFBD WIRING DIAGRAM ...
Страница 32: ...29 ELX UV GFBD WITH GPC 6000D WIRING DIAGRAM ...
