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Duct Placement
Figures 2 -6showcommon methodsof duct
placement f oreffective c ooleroperation.
Required Exhaust Openings
Using standardCFM ratings, a commonmethodfor
determining howmuchto opendoors or windows
for properexchange is:2 squarefeet
per 1,000CFM.
i
B/ou,'m"
' Ri_er
/
- R_ofst_
Purchased
Boxed
Separate_
TransilionDuct
Duct
FIGURES
Opening
ElectricalInstallation
(Ducted Models)
Disconnect
all electrical
power to the cooler before
attempting
to install, open, or
_service your cooler. If the
cooler is thermostatically
controlled,
the thermostat
is
not to he used as a disconnect
as it may reset and start the unit
unexpectedly.
Locate the junctionbox installed in cabinet comer.
Note that there are twoplug-ins, one for the motor
and one for the pump (see Figure 7). These may be
in the junction box or parts bag. The power supply
from your house must be connected to this junction
box to provide pump and motor power. The wiring
diagram in Figure 8 shows these connections.
Grounding
Install a groundwiretosuitableelectrical g round.
Shea*e
Alignment
Set Screw
MotorMounting
Bracket
Blou_r
"Put#y
MotorInstallation(Ducted Models)
Installation
1. Adjust s upportbrackets, i fnecessary, towidthof
motor.
2. Placemotor in brackets,withdosed portionof
motorcaseon top.
3. Placemotorstrapovereachresilient r ingmotor,
at the tabs,
4, Secureto bracketwithmachinescrewsand nuts.
5. Insert s heaveontothemotorshaft.
6. Installbeltfloramotorsheave tothe blower
pulley. A lign the sheave and pulley as shown.
Move motorsheavetoachieve alignment; do not
moveblower pulley(seeFigure9).
7. Tighten b elttotheproper tension. W hen
correctly tightened, the beltwilldeflectabout 1/2
inchbyhand(seeFigure10).
8. Rotateblower wheelbyhandtoseethatit moves
freely without r ubbingagainsthousing.
Checkmotormounting tobe sure allscrewsand
nutsare tightened d own.
ff cooleris connected toductwork, a ir delivery and
motoramperage willbe decreased due toincreased
duct resistance. To compensate f orthis,the motor
pulleyis adjusted outor in, usingan ammeterto
FIGURE 10
Ceiling
Anglelron
Support
checkmotoramperage. Toprevent overloading o f
motor, c heckamperage withall windows a nd doors
openand all air reliefsystems o perating. Notesheave
pitchset screw(seeFigure 1 0).
Removal
Unplug motorcordfromjunction box,loosenset
screwin motorpulleyto remove belland pulley.
Loosenandremove nuts andscrewson support
brackets.Remove motorstrapsfrommotor. P ull
motor frombrackets(seeFigure11).
_uBon:
Do not ex_ed
maximum amperage
output as stomped on the raotor
specification
plate or motor can
overload.
Only qtudifled pemons
with proper electrical
equipment
and knowledge
should adjust variable pitch
sheaves. Do not allow water to
get on the motor,, as it wlll burn
out the windings.
Disconnect
all electrical
power to the cooler and insure that belt
is not rotating before adjusting belt tension by
changing diameter
of adjustable
sheave. Adjust
belt tension only by adjusting motor bracket.
EIGURE8
OOk
-I
DO
l l5V l-Speed Electrical Wiring
(Tape back unused orange and t_l _res)
11572-sp¢ed
Electrical IViring
€°ra_ back unu_d
ornnge wire)
L
23ov I.Speec ElectricalWiring
(Tape back unused white wire)
_m
Evaporative
Cooler
Use and Care Manual
3
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