Payne C Series Installation, Start-Up, Operating And Service And Maintenance Instructions page 25

Table 6 – Filter Media Pressure Drop (Clean) Versus Face Velocity− In. W.C. (Pa)
Factory­Accessory
Face Velocity
Washable
FPM (m/s) (1­in. / 2.5 cm)
200 (1) 0.04
300 (1.5) 0.05
400 (2) 0.07
500 (2.5) 0.08
600 (3) 0.09
700 (3.6) 0.10
FURNACE CASING WIDTH
14-3/16{ (360)
17-1/2 (445)
21 (533)
24-1/2 (622)
* Recommended to maintain air filter face velocity. See Product Data for part number.
{ Not all families have these models.
DOOR
(10 mm)
3
/
8"
(32 mm)
1
/
1 TABS
4"
(TYP.)
1
25
/
8"
1
/
1 4"
(638 mm)
(32 mm)
(587 mm)
1
/
23
8"
1
17
/ 8"
OPENING
(435 mm)
Fig. 19 − Accessory Side Filter Rack
(1­in. / 2.5 cm)
(10) 0.05
(14) 0.09
(17) 0.13
(21) 0.18
(23) 0.23
(26) 0.29
Table 7 – Air Filter Selection and Duct Sizing − In. (mm)
FILTER SIZE
SIDE
RETURN
16 x 25 x 3/4
(406 x 635 x 19)
16 x 25 x 3/4
(406 x 635 x 19)
16 x 25 x 3/4
(406 x 635 x 19)
16 x 25 x 3/4
(406 x 635 x 19)
FURNACE
FILTER
FRAME
TABS
FILTER
(FIELD SUPPLIED)
1
/
2"
(13 mm)
3
2 / (60 mm)
8"
3
/
4"
(19 mm)
1
/
16
(410 mm)
8"
1
/
14 2"
(368 mm)
OPENING
A11091
Representative After­Market Filter Media*
Fiberglass*
(2­in. / 5 cm)
(13) 0.08 (20)
(22) 0.13 (34)
(32) 0.20 (50)
(44) 0.27 (69)
­ ­ ­
­ ­ ­
BOTTOM
RETURN
14 x 25 x 3/4
(356 x 635 x 19)
16 x 25 x 3/4
(406 x 635 x 19)
20 x 25 x 3/4
(508 x 635 x 19)
24 x 25 x 3/4
(610 x 635 x 19)
Fig. 20 − Accessory Bottom Filter
25
Pleated*
(1­in. / 2.5 cm) (2­in. / 5 cm)
0.18 (47) 0.12
0.30 (75) 0.21
­ ­ 0.31
­ ­ ­
­ ­ ­
­ ­ ­
FILTER TYPE
Washable*
Washable*
Washable*
Washable*
(31)
(52)
(78)
­
­
­
A11095