Table 5 - Unit Supply Opening Sizes; Table 6 - Unit Supply Face Velocity (Fpm) - Johnson Controls VB09 Installation, Operation And Maintenance Manual

SECTION 1 - INSTALLATION

TABLE 5 - UNIT SUPPLY OPENING SIZES

SINGLE HORIZONTAL
NO TOP
MODEL
OPENING
9 14W x 12H
12 14W x 14H
15 16W x 14H
18 Not Available
24 Not Available
30
Not Available
36
Not Available
NOTES:
1. Unit mounted supply grilles are supplied as double-deflection type.
2. Grilles for unequal airflow applications (for example, unit mounted plus ducted supply) are provided with integral opposed blade dampers.
3. All grilles are supplied in standard appliance white painted finish.
4. Grilles are shipped loose for field installation upon completion of cabinet/ductwork/drywall installation.
5. Top opening size does not change. When combined with any other discharge arrangement, it is included in determining horizontal opening
grille size.
6. Openings marked Not Available result in face velocities outside the recommended 300–500 FPM range.
7. Hi-static blower option or single horizontal discharge openings with unit mounted supply grille are not recommended.

TABLE 6 - UNIT SUPPLY FACE VELOCITY (FPM)

SINGLE HORIZONTAL
MODEL
NO TOP
OPENING
9
291
12
316
15 354
18 Not Available
24 Not Available
30 Not Available
36 Not Available
NOTES:
1. Tabulated face velocities do not account for supply grille free area factor. Face velocities at supply grille are higher depending on grille type.
2. Face velocities are based on the nominal rated CFM and feet per minute (FPM).
3. Face velocities are calculated by taking the average across all openings. Tabulated top opening face velocity is only for units with single
top opening and no horizontal openings.
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HORIZONTAL OPENINGS
DOUBLE HORIZONTAL
NO TOP
TOP OPENING
OPENING
14W x 6H 14W x 8H
14W x 6H 14W x 10H
14W x 6H 14W x 10H
14W x 6H 14W x 12H
14W x 10H 16W x 14H
14W x 6H 20W x 14H
14W x 10H Not Available
HORIZONTAL OPENINGS
DOUBLE HORIZONTAL
NO TOP
TOP OPENING
OPENING
272 219
344 221
314 283
391 294
397 273
416 276
410 Not Available
TRIPLE
HORIZONTAL
NO TOP
TOP OPENING
OPENING
Not Available Not Available
Not Available Not Available
Not Available 14W x 8H
14W x 6H 14W x 10H
14W x 6H 14W x 10H
14W x 6H 16W x 12H
14W x 6H 16W x 14H
TRIPLE
HORIZONTAL
NO TOP
TOP OPENING
OPENING
Not Available Not Available
Not Available Not Available
Not Available 236
294 235
364 291
339 269
385 261
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
TOP OPENING
12 x 8
12 x 8
14 x 12
14 x 12
14 x 12
18 x 16
18 x 16
TOP OPENING
510
645
471
587
729
538
610