Adjustment of blower speed, Color code for speed taps, Iv. care and maintenance – Bryant Gas Fired Forced Air 394 User Manual
Page 5: Cleaning, Care of blowers, Figure 4-flue-baffle retainer strip, Sc sex
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Adjustment of Blower Speed
Four-Speed Direct Drive
To change motor speed taps, remove the motor tap
lead (see Figure 1) and relocate it on the desired ter
minal on the plug-in terminal block/speed selector
located on the dividing panel. See Table I.
Belt Drive
The blower speed may be changed by opening or clos
ing the motor pulley. When adjusting blpwer speed,
be certain that both pulleys are adjusted the same
number of turns.
CAUTION: When adjusting the blower speed, make
certain that the temperature rise across the heat ex
changer does not exceed that specified on the rating
plate.
TABLE 1 - Factory Setting Blower Motor Chart
Unit
Size
Drive Type
SL
s
M
SE
SB
sc sex
Red
to
Blue
to*
Red
to
Blue
to
Red
to
Blue
to
Red
to
Red
to
Red
to
50
RI
4
1
4
1
80
3
1
4
1
100
2
1
4
1
1
1
1
125
3
1
3
1
1
1
1
137
2
1
2
1
1
1
1
165
2
1
1
1
190
1
1
1
220
1
1
*Use when relay kit is field installed.
Color Code for Speed Taps
Common (white)......................................................... #C Tap
Hi Speed (black).......................................................... #1 Tap
Med Speed (blue).........................................................#2 Tap
Med-To Speed (yellow)............................................... #3 Tap
Lo Speed (red)............................................................. #4 Tap
IV. CARE AND MAINTENANCE
Cleaning
The heat exchanger should be examined periodically
to see if there has been an accumulation of rust, soot,
etc. Clean as follows:
1. Disconnect pilot tubing at tube union.
2. Disconnect electrical lead from pilot. (In case of
100% shut-off controls, disconnect pilot thermocouple
lead from pilot relay or inline shut-off valve.)
3. Remove front plate from draft diverter (4 sheet-
metal screws).
4. Remove burners and pilot as follows:
a. Remove Tinnerman clamp from burner-holding
stud.
b. Slide burner off orifice and remove under
manifold.
c. Pilot is attached to one burner and is removed
with that burner. It is not necessary to detach
pilot before removing burner.
5. Remove metal angle strip holding flue baffles in
place. See Figure 4.
6. Remove flue baffles. See Figure 5.
7. Use flexible-handled steel cleaning brush to loosen
scale and soot. Remove scrapings from bottom of
combustion chamber.
combustion chamber.
8. Reassemble furnace by reversing above procedure.
NOTE: There is a slot in the back of the heat ex
changer for the back tip of the burner to fit into. When
properly placed, the burner will fit into this slot and
will be level.
Care of Blowers
All motors on the belt drive blowers are provided with
oil cups and should be oiled at least twice a year with
a nondetergent SAE 30 oil.
Figure 4-Flue-Baffle Retainer Strip
Figure 5-Removing Baffles
39394D41