Reznor CRGB Series, Assemblies

Page: 37 / 44

Form I-XE/CRGB/RPB, Mfg No. 131782 Rev 4, Page 37
4. Adjustment of the Switch - The "HIGH" actuation point of the
null switch is indicated on a calibrated scale secured to the trans-
parent range screw enclosure. Building pressure is set by turning
the adjustment screw. The "Low" actuation point is set by adjust-
ing the span of the null by turning the span adjustment screw. The
span range is .01 to .03" w.c.
IMPORTANT: To eliminate shipping damage to the switch contacts,
the manufacturer reduced the span adjustment to zero before ship-
ping. The span should be adjusted prior to using the switch. (If the
switch has been installed, disconnect the vent tube so that the null
switch is in a neutral position.) Remove the electrical box cover and
while observing the contacts, turn the span adjustment screw slowly
in a clockwise direction. Continue turning the adjustment screw until
you are able to see gaps between the common and both the low and
high contacts. A minimum gap provides the greatest sensitivity. The
wider the gap the lower the sensitivity.
5. See the wiring diagram included with the furnace to make electrical
connections.
A
C
D
B
F1
F2
25”
(635mm)
20” (508mm)
34”
(864mm)
E
A
C
F1
F2
B
D
25”
(635mm)
20” (508m
m)
34”
(864m
m)
20”
(508mm)
34”
(864mm)
F2
F1
A
20” (508mm)
B
35. Optional Filter Rack and Filters
35A. Filter Rack and Filters - Indoor Models
XE/HXE
Filter racks and filters are factory installed optional equipment on
indoor systems. 1" or 2" disposable, pleated disposable, or perma-
nent filters are available. For pressure drops, see the chart for outdoor
models in Paragraph 35B.
FIGURE 42A - Filter
Arrangement
Indoor
Sizes 75,
100, 125,
150, 175
FIGURE 42B - Filter
Arrangement
Indoor Sizes
200, 225,
250, 300,
350
FIGURE 42C -
Filter Arrangement
Indoor
Size 400
35B. Filter Rack and Filters - Outdoor Model
Series CRGB and RPB
Filter rack and filters are factory installed optional equipment. Filters are
available in 1" or 2" disposable, 1" or 2" permanent aluminum, and 1" or 2"
pleated disposable.
Tested in accordance with ASHRAE 52-76 Test Standard, the filters pro-
vided have the specifications shown in the table on the right.
Size, quantity, and pressure drops of filters for outdoor models are in the
table below. Refer to
FIGURE 43 , for filter arrangements.
Filter Pressure Drops (" w.c.)
Heater Filter Size Metal Fillers
Size A B C D E F1 F2
75,100,125 20x20 20x20 -- -- -- -- --
150, 175 20x25 20x25 -- -- -- 13/16 13/16
200, 225 16x25 16x20 16x25 16x20 -- -- --
250, 300 20x25 20x20 20x25 20x20 -- -- --
350 20x25 20x25 20x25 20x20 -- 4-13/16 --
400 16x25 20x25 16x25 20x25 16x25 2-5/8 1-1/16
D is p o s a b le P le a t e d
1" 2" 1" 2" 1" 2"
575 0.00 0.00 0.01 0.01 0.02 0.01
75 (1) 20x25 1000 0.00 0.01 0.02 0.03 0.05 0.04
100 (1) 25x25 1500 0.01 0.02 0.04 0.06 0.12 0.08
125 2000 0.01 0.02 0.08 0.11 0.22 0.15
2500 0.02 0.03 0.12 0.17 0.34 0.23
3000 N/A N/A 0.17 0.24 0.49 0.33
3500 N/A N/A 0.24 0.34 0.67 0.45
4000 N/A N/A 0.31 0.43 N/A N/A
1175 0.00 0.01 0.02 0.03 0.05 0.03
150 (2) 16x20 1500 0.01 0.01 0.04 0.06 0.07 0.05
175 (2) 16x25 2000 0.01 0.02 0.06 0.08 0.13 0.09
2500 0.02 0.03 0.10 0.14 0.20 0.14
3000 0.03 0.04 0.14 0.20 0.34 0.23
3500 0.04 0.05 0.20 0.28 0.40 0.27
4000 0.05 0.07 0.26 0.36 0.52 0.36
4500 N/A N/A 0.32 0.45 0.66 0.45
5000 N/A N/A 0.36 0.54 0.82 0.56
1550 0.01 0.01 0.03 0.04 0.06 0.04
200 (1) 16x20 2000 0.01 0.01 0.05 0.07 0.10 0.07
225 (1) 16x25 2500 0.01 0.02 0.08 0.11 0.16 0.11
(1) 20x20 3000 0.02 0.03 0.11 0.16 0.23 0.16
(1) 20x25 3500 0.03 0.04 0.15 0.22 0.31 0.21
4000 0.04 0.05 0.20 0.28 0.40 0.27
4500 0.05 0.06 0.26 0.36 0.51 0.35
5000 N/A N/A 0.32 0.44 0.63 0.43
5400 N/A N/A 0.37 0.52 0.74 0.50
1950 0.01 0.02 0.03 0.05 0.07 0.05
250
(1) 20x20 2500 0.02 0.03 0.06 0.08 0.11 0.08
300 (3) 20x25 3000 0.03 0.04 0.08 0.12 0.16 0.11
3500 0.04 0.05 0.10 0.16 0.22 0.15
4000 0.05 0.07 0.15 0.21 0.29 0.20
4500 0.06 0.09 0.19 0.26 0.37 0.25
5000 0.08 0.11 0.23 0.32 0.45 0.31
5500 N/A N/A 0.28 0.39 0.55 0.37
6000 N/A N/A 0.33 0.46 0.65 0.44
6500 N/A N/A 0.39 0.54 0.77 0.52
2750 0.02 0.03 0.06 0.08 0.12 0.08
350
(2) 16x25 3500 0.03 0.04 0.09 0.13 0.19 0.13
(3) 20x25 4000 0.04 0.06 0.12 0.17 0.25 0.17
4500 0.06 0.07 0.15 0.21 0.32 0.22
5000 0.07 0.09 0.19 0.26 0.40 0.27
5500 0.08 0.10 0.23 0.32 0.48 0.33
6000 0.08 0.12 0.27 0.38 0.57 0.39
6500 N/A N/A 0.32 0.44 0.67 0.46
7000 N/A N/A 0.37 0.51 0.78 0.53
3100 0.04 0.04 0.06 0.08 0.12 0.08
400
(1) 16x20 3500 0.05 0.06 0.08 0.11 0.16 0.11
(1) 16x25 4000 0.06 0.07 0.10 0.14 0.21 0.14
(2) 20x20 4500 0.08 0.09 0.13 0.18 0.26 0.18
(2) 20x25 5000 0.10 0.12 0.16 0.22 0.32 0.22
5500 0.12 0.14 0.19 0.27 0.39 0.27
6000 0.14 0.17 0.23 0.32 0.46 0.32
6500 0.17 0.20 0.27 0.38 0.54 0.37
7000 0.20 0.23 0.31 0.44 0.63 0.43
7400 N/A N/A 0.35 0.49 0.71 0.48
Heater
S ize
Qty & S ize
of Filters
CFM
P e rm a n e n t