Carrier 39E/ER - Manual (Page 2)

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