FACTORY-SUPPLIED DTilVES
Factory-Supplied Standard Drives are available
for the motors shown in Table 2, in the rpm range defined
by the minimum-maximum values given, subject only to
the following qualifieations:
1. Variable speed drives are available with a minimum
adjustment of ±7% (i.e., from .93 to 1.07) of any rpm
that falls within the range.
2. Fixed speed drives are available within ± 2% (i.e., .98
to 1.02) of any specified rpm within the range.
3. The minimum service factor will be 1.4 on all factory-
supplied standard drives. (Based on motor hosepower,
not brake horsepower. Actual service factor is nor
mally much higher.)
The factory-supplied standard 39E/ER drives have
been selected on the basis of performance, availability
and eost. They cover all normal requirements, but may
not meet every conceivable application. Non-standard
applications should be reexamined closely for possible
correetion to a standard applieation.
Standard factory drives are most desirable because of
cost effectiveness, optimized performance and timely
shipment.
Follow the 5-step factory-supplied drive selection pro
cedure on page 3 and order by 39E/ ER unit size, fan rpm
and type, fixed or variable. Do not use drive package
numbers from previous literature. Do included all rele
vant motor information — hp, voltage, motor rpm, type
and frame size.
Factory-Supplied Special Drives are available on
special order (quote control) and normally will require
extended lead time and additional eost. Consult your
Carrier representative for additional information.
Table 1 — Motor Hp/Fati Speed Limitations
for Minimum Bearing Life
UNIT
SIZE
MAXIMUM
MOTOR HP*
MAXIMUM FAN SPEED*
FC
AF
AF Optional
High-Speed Wheel
FC AF
08
Tk
10 2000 4335
4983
11 15 15 1600 4067
NA
13 15
15
1300 3161
3633
17
20 20 1100 2858
3285
19 20 25 1100 2547
2997
23 25 25 1200 2255
2653
29 25 30 1000
2079
2446
36 30 40 900 1886
2219
39 30 40
900 1886
2219
48 40 50 770 1611
1928
57
50 75 650 1397
1643
75
—
100
—
1412
1497
90
—
100
—
1334
NA
AF — Airfoil
FC — Forward Curved
NA — Not Available
'Indicates maximum hp and speed that can be used to obtain
200,000 hour average minimum bearing life (B10 life of 40,000
hours)
FIELD-SUPPLIED DRIVES
Field-Supplied Drives are subject to the physical
limitations and functional constraints of the motor and
air handler. See Fig. I and Tables 3-5. Since technical
assistance and support after the sale will be required,
choose the supplier with care. Deal with an established
supplier of known reputation, and share this booklet
with him.
Field Selection Guide
STEP
ACTION
INFORMATION REFERENCE
1.
Determine fan
Unit size
Fan Performance Catalog,
performance
Wheel type (FC/AF)
Fan speed (rpm)
Fan hp
39E-10P, or the Carrier
Electronic Catalog.
2.
Check performance
iimitations
Maximum rpm
Maximum hp
Table 1
3.
Check mounting space
iimitations
Motor type, hp, rpm and frame
size ^
Tables 3 and 4
4.
Determine motor
mounting designation
FI or F2'
Table 6
5.
Detennine drive type
Variable or fixed
Page 1
6.
Belt center distance
Maximum
Minimum
Table 5
7.
Determine maximum
Width
Tables 3 and 4
sheave dimensions
Radius
Fig 1
8.
Determine shaft
Fan
Table 5
diameters
Motor
Fig 1
(8 pages)
(8 pages)
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