Page 1
INSTALLATION
USE AND CARE
PARTS REPLACEMENT
Evaporative cooling works on the principle of heat absorption by moisture evaporation.
Your evaporative cooler draws outside air into specially made pads soaked with water, where the air is
cooled by evaporation, then circulated into your home.
Your MasterCool evaporative cooler has been designed to provide more efficient, consistent cooling
through use of a long-life MasterCool pad. It is a cellulose fiber treated with stiffening and wetting agents
to provide the most reliable evaporative pad ever devised.
Your cooler has two modules - wet and dry - which may be separated for service and cleaning, and
incorporates the most reliable components for long, trouble-free life.
MODELS:
MC43/44B
HC43/44A
MC63/64B
HC63/64A
REQUIRED: A special MasterCool motor kit is necessary for installation.
NOTE! READ AND SAVE THIS MANUAL -
"IMPORTANT SAFETY INSTRUCTIONS"
Model Number
Serial Number
The model and serial numbers for your unit
are located on the data plate attached to your cooler.
Record this information in the space allotted above.
This product covered by City of Los Angeles
Research Reports RR930224 (for all single
phase applications), or RR930190 (for 3 phase
applications) Electrical, and RR8141 Mechani-
cal. Copies of these reports are available from
the manufacturer upon request.
MasterCool" II, 1
Page 2
Installation and Start-Up ............................................................ ................................
Mounting and Securing ....................................................................... 3
Electrical Connections ........................................................................ 3
Grounding ............................................................. '.............................. 3
Installing Motor ................................................................................... 3
Installing Overflow Standpipe and Drain Line ...................................... 4
Connecting Water Supply ................................................................... 4
Faucet Use ......................................................................................... 4
Adjusting Water Level and Float Valve ............................................... 4
Installing Bleed-Off ............................................................................. 4
Installing Float Shield ......................................................................... 4
Maintenance Schedule
Annual Start-Up/Shut-Down ............................................................... 5
Required Exhaust Openings ............................................................... 5
Pre Start-Up Inspection ...................................................................... 5
Periodic Inspection ............................................................................. 5
Checklist ............................................................................................. 5
Cabinet Cleaning & Touch-Up ............................................................ 5
Scratches & Bare Metal ...................................................................... 5
Changing Pad ..................................................................................... 5
Adjusting Belt Tension ........................................................................ 6
Lubrication .......................................................................................... 6
Cleaning Water Pump ........................................................................ 6
Snugging Down Set Screws and Nuts ................................................ 6
Washing Pad ...................................................................................... 6
Parts Replacement
Motor .................................................................................................. 6
Pump .................................................................................................. 6
Float .................................................................................................... 6
Bleed-Off ........................................................................................... 6
Troubleshooting ........................................................................................................ 7
Getting the most from your cooler ...................... t................................................... 7
Maintenance ....................................................................................... 7
Add-On Coolers .................................................................................. 7
Insulation ............................................................................................ 7
Multi-Speed Motor .............................................................................. 7
Attic Vents .......................................................................................... 7
Thermostat Control .......................................................................... 3,7
2 • MastetCooP II
Page 3
Installation. and Start-Up
Read carefully before =nstalhng your MasterCo'bl evaporative cooler.
To install the unit the following tools are
needed:
• 5132" hax key allen wrench
Channel locks
• Pliers
• Adjustable wrenches
Tubing cutter
Screwdrivers
• Hammer
114"Socket wrench
• 7/16" Socket wrench
Before attempting to install the cooler,
make sure the following preparations have
been made:
• Assure that the mounting sudace is
strong enough to bear the weight of the
cooler when in use; remember that
when the system fillswith water, the
cooler will be much heavier than when
dry. The operating weight for MC units is
250 pounds, and for HC units is 295
pounds.
Make sure you have adequate means
for liftingthe cooler in place.
Make sure the mounting sudt_ceis level
in all directions.
• Make sure any ductworkandelectrical
needscomplywithlocal,state,county,
and federalcodes.
Caution: Aft electrical in-
stallations must comply
with local buflding and
safety codes, and must be
performed by qualified
personnel only. ,
Mounting
The blower module and the media module
can be separated before mounting by re-
moving tour bolts and one sh_ppingscrew
-see drawing below.
Placement and Securing
The duct opening for the 63/64 units
should be about 20" x 20"+ The cooler
discharge opening for these models is
19-3/4 x 19-3/4". For the 43/44 units the
duct opening should be about 18" x
15". The cooler discharge opening for
these models is 17-3/4" x 17-3/4".
If the cooler is to be mounted on the roof,
construct a suitable roof stand to support
the entire weight of the cooler. (The roof
jack or ducting should NOT be used to
support any weight ofthe unit). For models
MC63 or MC64 our #785 leg kit,sold sepa-
rately as an accessory, willadequately sup-
port the unit and secure it to the roof. For
High-Performance models HC43. HC44.
HC63 and HC64 we recommend that a full
stand be constructed in such a manner as
to support the entire perimeter of the
cooler. A leg kit only may not provide
adequate support forthese mode!s due to
their increased size and weight.
Place the cooler over the roof jack and
position so that it is level. Carefully seal
the space between the roof jack and bot-
tom of cooler with caulking compound,
silicone, asphalt or industrial sealing
tape to prevent air leakage, Then care-
fully seal the roof jack to roof with asphalt
or caulking compound to prevent air leak-
age from cooler or rain water from leaking
into mot. (See Figure 1). There should be
24 inches clearance on all sides of the
cooler for maintenance.
For maximum cooling performance
and even water distribution, the cooler
must be level. The base of the cooler
at the drain fitting should have at least
4" clearance to allow drain installation.
Electrical Connections
For the convenience of thermostat con-
trol, we recommend installing a
MasterStat TM Universal Cooler Control
Kit, Model CC1000A. Complete installa-
tion instructions are furnished with the
CC1000A Kit. For electrical connections
to a rotary wall switch, use the following
instructions:
Locate the junction box installed inthe dry
module. Junction box is to be installed
with the receptacle facing away from
the pad. Make certain all electrical cords
are clear of the belt, water, pulleys and
blower wheel. Note that there ere two
plug-ins, one for the motor and one forthe
pump. The building power supply must be
connected to this iunction box to provide
power to the motor and pump. The wiring
diagram in Figure 1 shows how the junc-
lion box receptacle should be connected
to the power supply. Make sure contro
switch and circuit breaker are in the OFF
position. Low voltage electrical supply
(below 105 V) may cause insufficient
water supply to pad,
®
Caution: Turn off afi elec-
trical power to the cooler
before attempting to in-
stall, open, or service
your cooler.
Grounding
Install a ground wire to suitable ground
according to local codes.
Install Motor
NOTE: A special MesterCool motor kit
Is necessary for installation due to the
custom designed receptacle In the
junction box.
1. Adjust motor cradle spacing.
2. Place motor in cradle (see Figure 2).
3, Place straps over each end, connect to
cradle and tighten.
4, Align sheave (motor pulley) with blower
pulley by moving sheave in and out on
motor shaft until visual alignment is
achieved. Tighten alignment set screw
to 125 in-lbs. Do not adjust to the point
where the motor sheave comes in con-
tact withthe motor face plate (see Figure
2). Belttensionshould be ad usted so the
beltwi defect 1/21o3/4 nchatthecenter
of the span per Figure 3. Re-adjust belt
tensionafter any pulley adjustment. Re-
place worn or damaged belts.
MOTOR STRAPS
_---'"-___U PPORT BRACKETS
AE_IUSTNENT
BRACKET
F/gure 3
Figure t
230 VOLT INSTALLATION
MasterCoot _ I/, 3
Page 4
Caution: Disconnect all
electrical power to the
cooler and insure that belt
is not rotating before ad-
justing belt tension. Do
not adjust belt tension by
changing dlamefer of ad-
justable sheave. Adjust
belt tension only by ad-
justing motor brackeL
Rotate blower wheel by hand to see that it
moves freely without rubbing against
housing.
Check motor mountinq to be sure all
screws and nuts are tightened down.
If cooler is connected to ductwork, air
delivery and motor amperage will be de-
creased due to increased duct resistance.
To compensate for this, the motor pulley is
adjusted out or in. using an ammeter to
check motor amperage. For maximum air
flow check motor amperage with all ser-
vice panels in place. To prevent overload-
ing of the motor, check amperage with all
windows and doors open and all relief
systems operating. Tighten pulley set
screw to 125 in-lbs.
A qualified serviceman is required to ad-
just motor before start-up.
Caution: Do not exceed
maximum amperage out-
put as stamped on the mo-
tor specification plate or
motor can overload. Only
qualified persons with proper electrical
equipment and knowledge should ad-
just variable pitch sheaves. Do not allow
water to get on the motor, as it will burn
out the windings.
Note on multi-speed switches: A switch
with separate terminals for the pump is
recommended.
Install Overflow
Standpipe and Drain Line
Install overflow drain bushing in bottom
wet section onthe rightside. Screw plastic
overflow standpipe into the drain bushing
and tighten snugly. Slide rubber washer
over drain bushing, push through bottom
of cooler, and tighten nut, Connect a per-
manent drain (copper/pvc/garden hose) to
the drain bushing for draining the unit and
overflow protection. Drain should be in
accordance with local plumbing codes.
FTgure4
WASHER
4 • MesterCooP II
Connect Water Supply
Connect water line to cooler as follows:
• A water valve should be installed at a
convenient location, to allow the water
supply to be turned onand off. 1/4"tubing
is used to provide water to the cooler. A
water connector kit, availubte from your
dealer provides the necessary items.
• Install float valve in the side panel of the
wet section opposite the pump.
• Place tube nut and ferrule over end of
tubing.
• Insert tube into float valve, and tighten to
Secure.
qOTE: Soft water equipment should not be
mttached to any water lines going "to a
ooler. "Soft Water" will cause corrosion
md decrease effective life of cooler.
Figure $
COMPRESSION NUT
FERRULE • _.
_RULE___
Fasten 1/4 inch water supply line to cooler
stand using tubing clamp and self-drilling
screw. Locate tubing clamp 18 inches or
less from water supply line entry intocabi-
net. (See Figure 5A)
f
SI_LF-DRtLUNG
SCREW
1/4" WATER
SUPPlyLINE
Faucet Use
Connect water line to water supply, as fol-
lows (refer to Figure 6).
• Install a sillcock and water valve on
faucet, as shown. Place tubing nut and
ferrule on tube end and insed in valve.
Tighten nuts on valve and tube.
l( faucet is not to be used for water supply,
installvalve on water lineto be used. Follow
instructions above for securing tubing to
valve.
Figure6 .,_,_ |t_--TUBING FROM
FAUCET , • "
F.nau.E
vW',v .
SILLCOCK
Adjusting Water Level
and Float Valve
Fillreservoir as follows:
• Turn water supply on. Check for good
pressure and flow from float valve.
• When float valve shuts off. check water
level. Water level should be from 1/2 to
1 inch below top edge of overflow
standpipe. It may be necessary toadjust
float valve by bending the rod (refer to
Figure 5).
• Check reservoir and all connections for
leaks.
Install Bleed-Off
A bleed-off system is provided with your
MastsrCoo| cooler. We recommend the
bleed-off be installed and maintained
while operating this unit. Its purpose is to
eliminate a small quantity of water from
recirculatlon thus reducing scale build-up.
Rgure 7
Install bleed-off as
follows:
• Install 1/4" black
plastic tubing into
pump as shown in
Figure 7.
• Insert smaller
black plastic
tubing into 114"
tubing as shown
in Figure 7.
Adjust bleed-off by shortening smalltube to
get the proper bleed rate shown below.
Disposal ofbleed-off water shouldcomply
with local codes. Use of chemical additives
or any water treatment otherthan bleed-off
isnot recommended forthiscooler. Failure
to use the bleed-off with MasterCool pad
greatly increases the mineral deposits and
reduces the expected life of the
MasterCool pad. and could result in early
replacement of pad at your expense.
SECONDSTOFILLA 12OZ.CAN
Model
MC43/44
MC43/44
HC43144
HC43/44
MC63;64
MC63/64
HC63/64
HC63/64
Motor Hp Seconds to fill
1/2 100
3/4 80
1/2 80
3/4 65
3i4 70
1,0 60
314 60
1.0 50
Install Float Shield
• Installshield overfloat valve as shown in
F)gure 8.
• Loop of cotter pin fits into hole in shield.
• Cotter pin loop and hole must face
MasterCool pad.
IEIIT'_p R PIN
Page 5
Required Exhaust
Openings
Using standard CFM ratings, a common [[_.L_
method of determining how much to open
doors or windows for proper exchange is:
2 square feet per 1000 CFM.
Pre-Start-Up Inspection
Assure that:
• Cooler mounting is level; duct is sealed.
• Cabinet issecurely fastenndto mounting.
• Cooler cabinet is grounded. Electrical
connections are safe and secure.
• Motor, pump, and float installed. Motor
and pump plugged into junction box.
• Pump impeller turnsfreely. Remove pump
and basket. Remove impeller cover (see
FigurelO and spin the impeller to assure
free rotation).
• Water line connectedsecurelywithout
leaks.Water supplyturnedon.
• Floatadjusted forproperwaterlevel.
• Blower, shaft, collar, and pulley set bolts
are snug (do not overllghtan pulley boll).
• Pulley alignment okay; belt tension okay
(see page 3 for instructions).
• Blowerbearingsarelubricated.Filloilcup
witha goodgrade SAE2OWor30W oil
• Pad is pre-soaked. Check to see that
pump starts and pad is evenly Wet.
• Open windows or vents in house.
• In case of trouble in any oi these stag_,
refer to the Troubleshooting Chad on
page 7.
Caution: Never operate unit
with service panels, pad
or inlet _ter removed This
will result In am overloaded
€ondition and may damage
the blower motor.
Periodic Inspection
In addition to the planned maintenance
schedule, regular inspection of your
MasterCool cooler willenhance the chance
for longtrouble-free service life.
Checklist
Check for leaks
0 Is cooler level?
0 Are there dry spots on the pad when
cooler is in operation?
CI Does blower turn freely?
0 Isthere 25 Ibs.tension (models 63/64)
20 It=. tension (models 43/44) on drive
belt?
0 Are bolts, nuts, and set screws snug?
0 Is float set correctly?
0 Iswater pan clean?
Cabinet Cleaning and
Touch-up
The cabinet and all internal parts except
blower and drives are fumlehed with a hard
appliance-type Polybond• coating. This
surface ishighly resistantto scale and cor-
rosion.A softcloth, warm water, and a mild
cleanser will bdng all surfaces back to like
new appearance. Avoidsteel wool or sand-
paper in normal cleaning ofthe cabinet.
Scratches and Bare Metal
In the unlikely event that scratches or bare
metal areasoccur, sand orrub the area with
steel wool to prepare the finish. Paint with
standard paint or touch-up paint available
through your dealer.
Changing Pad
This should be done after 5 years or if
passages are clogged.
NOTE: Hosing off inlet face of pad can
unclog passages of dust, and minerals ac-
cumulated there. Light ecrapinge of the in-
take edges of the pad will not harm its
openings and will remove more stubborn
scale.
Caution: Avoid splashing
water on blower motor.
• Remove wet section top.
• Remove water distdbutor assembly,
disconnecting hose.
• Lift out used pad sections.
• Replace wllh new MastarCool pad only,
available from your dealer. Aspen and
other evaporative pads WILL NOT
WORK.
Maintenance Schedule
Regular maintenance isa key to long successful service ofyour MasterCool cooler. The selvice schedule willhelp you maintain an efficient
unit with good appearance.
MAINTENANCE REQUIREMENTS ANNUAL ANNUAL
(LOCATION IN MANUAL) START-UP SHUT DOWN
Changing pad (p. 5) At beginning of6th
year or ifpassages
are blocked.
Cleaning & touch-up (p. 5) X
Cleaning water pump (!o.6) X
Lubrication (p. 6) X
Adjusting bell tehsion (p. 6) X As needed
Periodic inspection (p. 5) Duringcoolingseason Duringcoolingseason
Snugging downset screws & nuts(p. 6) X
Adjustingblend-off(p.4) X
Washing down pad withhose (p. 6) X
Drain allwater lines to and fromthe
cooler to prevent freezing X
NOTES:
DO NOT UNDERCOAT THE WATER
RESERVOIR.
Your MastarCoolIIcooler'swater reser-
voirisfinishedwitha Polybond®appliance
type finish. It is so hard, asphalt type
coolerundercoatwillnotstickto it.Under-
coat willbreak free and clog pump and
waterdistributor.
Do not use cooler cleaners,
cooler treatments, or other
additives in this evaporative
cooler. The use of any of
these products will void your
warranty and may impair the
life of your evaporative cooler.
MasterCooP II* 5
Page 6
Adjust Belt Tension
Each time you inspect your cooler, be sure to
check belt tension on motor/blower assem-
bly. Check belt condition and replace it if
frays or defects appear: Check alignment of
blower pulley with motor pulley.
Lubrication
Blower shaft bearings need periodic lubri-
cation. The oil cups on the blower shaft
bearings should be filled with a good grade
SAI= 20W or30W oilwhen necessary. Under
normal use, oiling is required every three
months of operation. DO NOT OVER OIL.
The pump and blower motor do not require
lubrication.
Four
Rgure 9
tabs
Cleaning Water Pump
Disassemble and clean water pump as
follows:
• Disconnect pump from electrical box.
• Remove pump
• To Prevent breakage, carefully release
the four snap-out tabs, and lift impeller
base plate from the pump body.
• Using a mild detergent solution, wash
all deposits from inside around impeller
and impeller base plate.
• Spin impeller to dislodge any foreign
material.
• Rinse and reinstall impeller base.
• Reinstall pump.
• Make sure to usa a pump screen or
basket. Check to sea if old one needs
replacing due to clogging
®
Caution: Do not allow pump
to topple over and become
submerged; water will
damage pump motor.
Snugging Down Set
Screws and Nuts
Location of set screws and hardware that
should be snugged down.
• Pulley set screw (150 in-lbs)
• Blower set screws (150 in-lbs)
• Wet and dry module connection bolts
Washing Pad
Annually, mineral a.ccumulation and dust
should be washed off the intake sudsce of
the pad. Use garden hose and nozzle. A
paint scrapper may be used to remove hard-
ened scale from edges of intake passages in
pad.
Parts Replacement
Motor
Removingold motor
• Disconnectpowertocooler
• Unplugfromjuncflonbox-4 pinplug
• Loosenalignmentset_:mw on
motorpuney(onmotorsideofpulley)
andmmevebaitand motorpulley,
• Flemovemotorstrap6.
• Pul motorfrombrackets,
Replacing motor
• Reverseproceduretoinstall
new motor,
Pump
Removing old pump
• Disconnectpowerto cooler.
• Unplugfromju_ box(3pinping),
• Unscrewpumpbracket.
• Liftoutpump.
Replacing pump
• Remove impeller base plate at
bottom or pump by releasing tour
tabs,
• Spin impeller to assure free
rotation.
• Reinstall impeller base plata.
• Clean old pump basket or replace.
• Race pump in basket.
• Attach bracket to cabinet.
• Connect pump plug to junction
box (3 pin receptacle).
• Connect pump hose to hose
fitting.
Bleed-off
Removal of old bleed-off
• Replacebleedlineif necessary.
Installation of bleed-off
assembly
• To installbleedline topumpsee
Rgere7.
• Bleedllneshouldfilla 12ounse
beveragecanasindicatedinchart
onpage4.
• Adjustblasd rate byshoriening
smallbleedtuba.
Float
Removing old float
• Removefloatshield
• Removenutand ferrulefrom
waterline.
• Removelockwasherand nutfrom
valve.
• Liftfloatout o!cabineL
Replacing or installing float
valves:
• Secure nutand lockwasher
holdingfloatto cabinet.
• Placetubanutandferruleoverend
oftubing.
• Inserttubeintofloat valveand
tightentosecure.
• Turnon lauoatallowingwaterto
enterthroughvalve,
• Fill from1/2 to I inchbelowtop
edgeof overflewstandpipe.
• Adjustfloatballby bandingthe
float armwitha pairol pliersto
achieve correctangle.
• Reinstallfloatshield.
Page 7
Troubleshooting
Symptom Possible Causes
• Unit fells to Itart of deliver NO elactrlcal power io unit
Ilr • Fuse blown
• _N breaker_ed
• Co_s) damagedor
unplugged
• Bel toolooseortootlgnt
• M_ cve_ andfrozen
• _t_m
• Blowerwileelbeadngsd_y
• Meleeoverloaded
• Fauly wiriogm _lofts
Remedy
Checkpower
• Replacetuse"
• Resetbreaker"
•ffcondition_s, can
eleclrk_n
• PlugInco_ or replaceIf
damaged
• Adjust_n ten_
• Replace motor
• Adjustbel tensionor replace
• Lubdc=sblowerbearlr_s
• Us_g =nm_ef, adlua
rnolcrio lull bad amps(see
motetnamep_e).
• cal einctddan
• Unit lUlrts but eir delivery
Inidequete
_ _ s_e_ U exheu_
Motor
Be4ioo bose
MamrCo¢padp_
alum windows or doors to
Increaseventkellon
Usingamm_er,aclu_ motorto
lull_ (seemotornamep_e)
AdJu_be#lanslonm replaceN
needed
R_seormp_cepad
• I_dequete cooling
_lao ex_uM In house,
Alrreg_siers_robe_
pos_oned.
Insufnclari w_. liow Io pad. pad
r_o(weA.
:Pad
_'_n h_ _
• Loose¢o_¢fk_ In _ler
mm
• _ b_fl w_
O_oen w_dows or door to
InceNse ventliollon.
AdJusl to direct air as _slmd.
Check water Q_n wstem
• Rinse orrep_ce pad
• C_ _Ins
• U_ pump.Cban Im_Uer
_ ofaNfo_ m_er
• Check for leeksand corre_
• Rasel orreplacebleed-offkit
• Cio;mbasket
• .ot_ cycles on and off Exceesk,e b_dllenslon
• Blow_•heirtighto_frozen
Meleeoverloaded
Incormd sheaveadjustment
P_eys mba_gned
_panels, padorInio_liter
Adjustbelttension
• Lubrk:atebk)werbeadngsand
rotatesha_by hand(poweroff)
Correct-donot exceedname
plataamps.
Servlcernanshouldadjust
Ct_eckaNgnment
Neveroperateu_t withsauce
paneb,pador'_et flllarremoved.
INs wiNresultIn anevade•bed
€o_dl_ andmaydamagemeier.
• Wear dmlnl_ from • FIO_[arm Improperly • Ad_sl
overflow standpipe e_Justed
• ,_-_eatio IInatvalveleak_g *_ lanai',_ve
• _r_t_ ._e_
• Knocking or banging Bearings dr/ Lubd_e blowerbea/_lgs
sound • Wbeelrul_r,gt_v,w * Irebedblowxabet.eol_,
hous_orro_k_o_beJ_ce _ e_ puky.N_vner_an_
• L_ • R_o_ _d
• Blower shakes or rattles Bck or pulley loose Inspectbelland ad_ I needed.
,,wt_ben_-rit_acepuny.
• Excessive humldl_ In _a_e e_lau_ Op_ _x_ Or_ la
harms vengei_on.
i Mu_y or unpleasant odor _ain _ s_ wal_ In _oir Dm_ Ilushand dean re_wo_
• Pad_ldewed or clogged • Checkbleed-_ seeing
• Pad notcomplatel)'v_t beiore D_ypadanclbogotapan
coolerIsturnedon *Turnonwale_beioms_adlngu_
• Newpad * NOTE:Themwillbea sl_l ode€"
noticedonInNlaJs_-up. Tbeodo¢
wEdlsappeaJ-vAhhthe11mtk_v
dayso_opera_bnI bleedolfIs used.
Getting the most
from your cooler
Your evaporative cooler is a finely crafted, eco-
nomically operating unit built on decades of
know-how and reseamh. It serves as the head of
an overall air cooling and moving system for your
home. Butthere are a number of ways you can
maximize the comfort, efficiency, economy and
convenience of your total cooling system.
Maintenance
Regular maintenance as recommended in this
manual, isessential for cooling comfort, extend-
ingthe life of yourcooler, and avoiding unneces-
se_/pads replacements. Start-up and shutdown
servicing should never be ovedooked.
Add-On Coolers
Coolers come in a wide array of sizes, horse-
power, and capacities, suitableforpatio, garage,
guestroom, and so fodh, More than one coolerin
a single home improves the cooling effective-
ness of the system. Owners of refrigerated air
conditioning have found that the addition of an
evaporative cooler vastly reduces their electric
bills.
Insulation
Once your cooler forces cooled air into your
home and pushes the hot air out, good insulation
around your ductwork will keep the air as cool as
possible. Whola-house insulation will prevent
heat from seeping in and will also improve cool-
ing comfort.
Multi-Speed Motor
The cooling rate can be controlled by increasing
and reducing the amount of cooled air blowninto
your home. Two-speed motors allow youto use
higher speeds during the hottest pad of the day,
lower speeds for milder temperatures.
Attic Vents
By exhausting cool air through the attic, you can
reduce the temperature ofthis hotspot and make
your home more comfodable.
Thermostat Control
The addition of automatic control makes your
system convenient and efficient. We recommend
the MasterStat TM, Model CC1000A, Universal
Evaporative Cooler Thermostat and Control Kit.
MasterCooP I1.7
Page 8
AdobeAir, Inc. * 500 S. 15th Street • Phoenix, AZ85034
L411004A • 1/96
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