NuAire LabGard ES NU-543-300S, Operation And Maintenance Manual

Page: 48 / 72

OM0239 Page 48 of 72
April 2021
Alternative Test Data for reference- Inches (mm)
Model Size
Window Access Height
300
10/8/12
6.25
(159)
13.542
(344)
20.834
(529)
28.125
(714)
400
10/8/12
7.0
(178)
12.396
(315)
17.792
(452)
23.188
(589)
28.584
(726)
33.980
(863)
39.375
(1000)
500
10/8/12
7.25
(184)
13.518
(343)
19.786
(503)
26.054
(662)
32.322
(821)
38.590
(980)
44.858
(1139)
51.125
(1229)
600
10/8/12
7.5
(191)
15.410
(391)
23.320
(592)
31.230
(793)
39.140
(994)
47.050
(1195)
54.960
(1396)
62.870
(1597)
6.25
(159)
7.0
(178)
7.250
(184)
7.5
(191)
12.5
(318)
12.5
(318)
12.5
(318)
12.5
(318)
18.750
(476)
18.0
(457)
17.750
(451)
17.5
(445)
Number of Readings: Average Velocity ft./min.(m/s)
D. Acceptance Criteria:
1. Average downflow velocity = 60 LFPM

5 LFPM (.30 m/s

.025 m/s)
2. Individual readings must be 20% of the average downflow velocity _____ to _____ fpm (_____ to _____ m/s)
B. Inflow Measurement
a. Recommended Instrument: Shortridge Flowhood ADM-870 or TSI 8355 Thermo anemometer.
b. Primary Procedure:
The primary procedure to determine inflow velocity uses a Direct Inflow Measurement (DIM) Instrument (i.e.
Shortridge flowhood). The DIM Instrument can be used directly on the cabinet with NO CORRECTION FACTORS
REQUIRED if operated in the local density default mode. NSF has tested the cabinet and established listed air
velocities. Use duct tape to secure the DIM Instrument to the cabinet preventing any sneak air paths from occurring.
The DIM Instrument will read inflow volume (i.e. CFM). Use the window access opening area to calculate inflow
velocity.