Carrier WEATHERMAKER 39B - Unit Start-Up Checks; Start-Up Checklist Items; Vibration Troubleshooting Guide

Belt Guard
UNIT SIZES 040 THRU 120
1. Position belt guard and drill three engagement
holes (sizes 040 thru 060) with a no. 5 drill or
four engagement holes (sizes 070 thru 120)
with a no. 3 drill in side of fan section using
mounting bracket clearance holes as templates.
2. Secure guard to fan section witi three
1/4-20 x 1/2-in. self-tapping screws.
UNIT SIZES 130 THRU 140
1. Position belt guard and drill eight engagement
holes with a по. 3 drill in side of fan secti: 1,
using mounting bracket clearance holes a:
templates.
2. Secure guard to fan section with eight
1/4-20 x 1/2-in. self-tapping screws.
3. Position two unattached mounting brackets
over unit front or top structural member and
secure to guard with four 1/4-20 x 1/2-in.
self-tapping screws and guard engagement holes.
4. Drill four engagement holes in unit structural
Fig. 26 — Securing the Bearing Eccentric
Locking Collar
members with a no.2 drill, using mounting Table 9 — 39B Filters, 2 Inches Thick,
bracket clearance holes as templates. (No. ... Size)
5. Secure two mounting brackets to unit struc- rene LOW VELOCITY AND HIGH
tural members with four 1/4-20 x 1/2-in. self- MIXING BOX VELOCITY
tapping screws. | 040 Ї...1бхдӘ
060 21605 А
START-UP 2...20x20 (
Check List 070 2...20x25 3...25x20
; : loc: 2 ..16x20
1. Make certain all construction debris is removed Hosen gis T t
from unit interior. 080 3 .20x25 6...16x20
2. Check lubrication of fan and motor bearings. а =
a. Note that bearings are shipped completely 090 3...20x25 8...16x20
full of grease for corrosion protection and 3... 16x20 |
may run warm temporarily on start-up until 100 8...20x20
the excess grease has discharged. As a 105 ee
precaution, cycle unit on and off at one- and 14 .16x20
minute intervals for five minutes. NODE LER. |
b. Sleeve bearing motors are normally shipped 120 4 16x25 14. 16x25
with oil reservoir drained. Fill reservoir — "136 | 38 20:20 24- 20.20 —
before starting motor. 135 and 140 | 36...20х25 | 24 20х25
. Check secureness of bearing locking collars per
Table 4. Refer to Fig. 26 for eccentric type. 8. Vibration Check:
4, Recheck sheave alignment and belt tension. NOTE: After final assembly, unit is checked to
5. Make certain fan shaft turns freely and fan ensure vibration level is within tolerance.
wheels do not rub in housings. If excessive vibration is noted, check following:
6. Make certain filters used during building con- a. Drive alignment
struction
are
replaced
with
new
ones.
Refer
to
b.
Mismatched
belts
Table
9.
c.
Wheel
or
sheaves
loose
on
shaft
7. Check direction of rotation and fan speed. * pec of a
Arrow on fan drive side indicates correct i ee :
d | f. Motor out of balance
direction of rotation. Excessive fan speed may g. Sheaves eccentric or out of balance Q’
result in condensate carry-over from cooling h. Vibration isolators improperly adjusted
coil and/or fan motor overload. Refer to i. Worn or corroded wheel (replace if bad)
39B, 39C Operation and Maintenance Instruc- j. Accumulation of material on wheel (mate-
tions for operating limits. rial accumulation should be scraped off).
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