Goodman Mfg ANSI Z21.47CSA-2.3 - Manual (Page 22)

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for the purpose of airflow balancing, but once the balance
has been achieved, fixed sheaves maintain alignment and
minimize vibration more effectively. For direct drive units, move
green wire for fan.
MOTOR SHEAVE ADJUSTMENTS
V L , V M & 2 VP V ARIABLE P ITCH K EY T YPE M OTOR S HEAVES
The driving and driven motor sheaves should be in align-
ment with each other and the shafts parallel.
V
L
& V
M
S
HEAVES
A
DJUSTMENT
1. Loosen set screw “B” using a 5/32" Allen key.
2. Making half or full turns from closed position, adjust
sheave pitch diameter for desired speed. DO NOT
OPEN MORE THAN SIX FULL TURNS.
3. Tighten set screw “B” securely over flat.
4. Carefully put on belts and adjust belt tension. DO NOT
FORCE BELTS OVER GROOVES.
5. Ensure all keys are in place and the set screws tight
before starting drive. Recheck set screws and belt
tension after 24 hours service.
NOTE: Future adjustments should be made by loosening the
belt tension and increasing or decreasing the pitch diameter
of the sheave by half or full turns as required. Readjust belt
tension before starting drive.
C
B
VL & VM
NOTE: For horizontal discharge, remove the supply and return
duct covers and place them over the vertical discharge return
and supply openings (bottom of unit).
NOTE: Do not operate sheave with flange projecting beyond
the hub end.
MAINTENANCE
HIGH VOLTAGE !
D ISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT . M ULTIPLE POWER SOURCES MAY
BE PRESENT . F AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE , PERSONAL INJURY OR DEATH .
WARNING
T O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER
INSTALLATION , ADJUSTMENT , ALTERATION , SERVICE OR MAINTENANCE ,
REFER TO THIS MANUAL . F OR ADDITIONAL ASSISTANCE OR
INFORMATION , CONSULT A QUALIFIED INSTALLER , SERVICE AGENCY OR
THE GAS SUPPLIER .
WARNING
S HEET METAL PARTS , SCREWS , CLIPS AND SIMILAR ITEMS INHERENTLY
HAVE SHARP EDGES , AND IT IS NECESSARY THAT THE INSTALLER AND
SERVICE PERSONNEL EXERCISE CAUTION .
CAUTION
Preventive maintenance is the best way to avoid unneces-
sary expense and inconvenience. Have this system inspected
at regular intervals by qualified service personnel, at least
twice a year. Routine maintenance should cover the follow-
ing items:
1. Tighten all belts, set screws, and wire connections.
2. Clean evaporator and condenser coils mechanically
or with cold water, if necessary. Usually any fouling is
only matted on the entering air face of the coil and
can be removed by brushing.
3. Lubricate motor bearings.
4. Align or replace belts as needed.
5. Replace filters as needed (see below).
6. Check for blockage of condensate drain.
7. Check power and control voltages.
8. Check running amperage.
9. Check operating temperatures and pressures.
10. Check and adjust temperature and pressure controls.
11. Check and adjust damper linkages.
12. Check operation of all safety controls.
13. Examine gas furnaces (see below and the User’s
Information Manual).
14. Check condenser fans and tighten set screws.
F ILTERS
T O PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF EQUIPMENT
EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT BUILD UP
ON INTERNAL PARTS , NEVER OPERATE UNIT WITHOUT AN AIR FILTER
INSTALLED IN THE RETURN AIR SYSTEM .
CAUTION
Every application may require a different frequency of replace-
ment of dirty filters. Filters must be replaced at least every
three (3) months during operating seasons.
Dirty filters are the most common cause of inadequate heat-
ing or cooling performance. Filter inspection should be made
at least every two months; more often if necessary because
of local conditions and usage.
Dirty throwaway filters should be discarded and replaced with
a new, clean filter.