Blower Sheave Assembly Data - Modine Manufacturing DBP Installation And Service Manual

BloWer sHeave assemBly data

adjusting the Blower drive setting
Based on the Sheave Arrangement, Tables 34.1 through 35.5
give the Sheave Assembly numbers used on units that include a
blower. The Sheave Arrangement is Digit 19 and is found on the
unit Model Identification Plate. The Sheave Assembly describes
the motor and blower sheave size and bore as well as the belt
provided.
To determine how many turns open the motor sheave should be
set for:
1. Follow the Selection Procedure found on pages 28 and 29
to determine what blower rpm is required to meet the job
specifications.
figure 34.1 - Blower section
EXTENDED
GREASE LINE
ZERK FITTINGS
1/4" PERIMETER
GASKETED
BLOWER
CONNECTION
CONVENIENCE
OUTLET
SAFETY SWITCH
Blower sheave assembly numbers
table 34.1 - digit 16 = a or B (9-7 Blower units)
motor frame 656-1001
size
Digit 19 Sheave Assembly Digit 19 Sheave Assembly Digit 19 Sheave Assembly Digit 19 Sheave Assembly Digit 19 Sheave Assembly
48 A 3H35125B1
3H35125B2
56 B
143 or 145
table 34.2 - digit 16 = c or d (9-9 Blower units)
motor frame 656-1001
size
Digit 19 Sheave Assembly Digit 19 Sheave Assembly Digit 19 Sheave Assembly Digit 19 Sheave Assembly Digit 19 Sheave Assembly
48 A 3H35126B1
56 B 3H35126B2
143 or 145
182 or 184
34
EXTENDED
GREASE
BLOWER DOOR
SUPPORTED
BLOWER AND
978-1265
C 3H35125B3
3H35125B4
D
E 3H35125B5 G
978-1265
C 3H35126B3
D 3H35126B4
3H35126B5
E G
H
2. Locate the unit Model Identification Plate and note Digit 16
and Digit 19 of the model number. Digit 16 is the Blower
Size and Type and Digit 19 is the Sheave Arrangement.
3. Once the Blower Size and Type (Digit 16) is known, enter
the proper Sheave Arrangement table.
4. Use the Sheave Arrangement (Digit 19) to determine the
Sheave Assembly provided.
5. Use Table 36.1 and the Sheave Assembly number to
determine the required turns open to achieve the
desired blower rpm.
6. Set the motor sheave as described in Blower Adjustments.
ADJUSTABLE
MOTOR TWO-SPEED
LINES SHEAVE
BOTTOM
MOTOR
rPm range
1150-1561 1526-1858
3H35125B6 3H35125B8
F H
3H35125B7 I 3H35125B9
rPm range
1150-1561 1526-1858
F 3H35126B6 I 3H35126B9
3H35126B7 3H35126B10
J
3H35126B8 K 3H35126B11
5-565.1
5 HP
FILTER
RACK
MOTOR
DIRECT
DRIVE
DAMPER
ACTUATOR
1763-2147
3H35125B10
J
K 3H35125B11
1763-2147
L 3H35126B12
3H35126B13
M
N 3H35126B14