MasterCool MMBT12, MMBT14 Operation Manual
INSTALLATION AND OPERATION MANUAL
MOBILE EVAPORATIVE COOLER
Circle the model of your cooler and record the serial number.
Encierrre con un circulo el modelo de su enfriador y escribe
el número de série.
MMBT12 MMBT14
DATE OF PURCHASE:
FECHA DE COMPRA: ___________________
SERIAL NUMBER:
NÚMERO DE SÉRIE: _________________
Read carefully all of this manual before installing the unit /
Lea con cuidado todo este manual antes de instalar la unidad.
TABLE OF CONTENTS
SAFETY INSTRUCTIONS ...................................................... 1
HOW EVAPORATIVE COOLING WORKS ............................. 1
COOLER ASSEMBL Y ............................................................. 2
OPERATION ........................................................................... 2
MAINTENANCE ......................................................................3
ROUTINE. ......................................................................... 3
YEARLY ............................................................................. 3
TROUBLE SHOOTING ...........................................................4
SPECIFICA TIONS .................................................................. 4
LIMITED WARRANTY ............................................................ 5
INSTRUCCIONES EN ESPAÑOL ................................6-9
ILLUSTRATED PARTS LIST /
LISTA ILUSTRADA DE PIEZAS DE REPUESTO
(ENGLISH / ESPAÑOL) .................................................. 10-11
GARANTIA LIMITADA .......................................................... 12
HOW EVAPORATIVE COOLING WORKS
Evaporative cooling is nature’s way of cooling. When air is
moved over a wet surface, water is evaporated and heat is
absorbed. When stepping out of a swimming pool with the wind
blowing, evaporative cooling makes you feel cool, even though
the air may be warm. The human body itself is cooled primarily
by the evaporation of perspiration.
This unit works on the same principle. Air is drawn across
wet fi lter pads where the air is cooled by evaporation and then
circulated throughout the building. It is this combination of
cooled air and the movement of air over the skin which makes it
feel cool.
Unlike refrigeration systems which recirculate the air, an
evaporative cooler continually brings in fresh air while
exhausting old air. You are completely replacing the air every 2
to 4 minutes by opening windows or doors or a combination of
both. The air is always fresh, not stale, laden with smoke and
odors as happens with refrigerated air conditioning.
PN 110522-3 REV. 11-15
READ AND SAVE THESE INSTRUCTIONS
1. Read these instructions carefully.
2. Unit must be in the Off Position and Unplugged from power
receptacle when installing or performing any maintenance.
3. This cooler will run on 120 volt A.C., 60 Hz (cycle) current
only.
4. Motor and pump are grounded and have an automatic thermal overload switch which will shut motor off if it overheats.
The motor will restart automatically when it cools down.
5. Pump receptacle is for grounded evaporative cooler pump
only. Do not plug anything else into receptacle.
6. Do Not operate any fan with a damaged cord or plug. Discard fan or return to an authorized service facility for examination and/or repair.
. Do Not run cord under carpeting. Do Not cover cord with throw
7
rugs, runners or similar coverings. Do Not route cord under
furniture or appliances. Arrange cord away from traffi c area
and where it will not be tripped ove
8. Use only in GFCI protected receptacles.
r.
WARNING: To reduce the risk of fi re or electric shock,
do not use this fan with any “solid-state fan speed control
device.
2 SPEED MOTOR
WATER-SATURATED
COOLER PADS
3 SIDES
WATER
LINE
FLOAT
WATER DISTRIBUTION HOSE
AIR FLOW
BLOWER
GRILLE
)
WATER PUMP
COOLER ASSEMBLY
NOTE: Installation kit and manual are inside the unit.
1. Unpack unit from carton. Please recycle and discard of packing material responsibly.
2. Two screws secure each louver panel. Locate and remove the screws about 1-1/2 inches
below the plastic work top. Replace these screws when re-installing panel.
3. Access the interior of the unit by using the handhold at the bottom of the louvered side to
lift up and out of the cabinet. Locate and remove the plastic bag of parts and manual.
CASTER INSTALLATION
NOTE: The installation kit includes (2) swivel casters with brake, (2) swivel casters
without brake, (16) tinnerman nuts and (16) 1/4-20 x 1/2 screws.
1. Place the unit on its side. Place the tinnerman nuts on the caster bracket on the bottom pan.
2. Attach the casters to the brackets with the screws provided. See illustration at right.
WATER CONNECTION
In addition to containing a large reservoir, this unit can have constant water supply via a common water hose or designated water line.
• Install drain assembly. Place the nipple through the hole in the pan, with the rubber
washer between the pan and the head of the drain nipple. Thread nut onto nipple and
draw up tight against bottom of pan. Thread the drain cap to the nipple and tighten water tigh
• Install fl oat valve. Refer to fi gure at right. Install the valve in the provided hole in the
corner post using the provided washer and nut. Install the included garden hose adapter
to the fl oat as shown if attaching a garden hose to the unit. A 1/4 inch water line may
also be used to supply a continuous amount of water to the unit.
• Fill pan with water. You may fi ll the pan manually for up to 3 hours of cooling. For auto-
matic fi lling you may attach a garden hose to the garden hose adapter or a 1/4 inch water
line to the fl oat valve.
Note: Do Not Overfi ll. Fill water to a maximum height of 2 1/2 inches (approximately 1
inch from the top of the bottom pan).
to be adjusted
to maintain this water level. This can be accomplished by bending the fl oat
If using a garden hose or water line, the fl oat will need
rod.
t.
FLOAT
HAND HOLD
REMOVE 2 SCREWS AT
1
TOP OUTSIDE OF LOUVER
PANEL
2
PUSH PANEL UP,
ANGLE BOTTOM
OUT, AND
REMOVE PANEL.
NUT
NIPPLE
RUBBER
WASHER
BOTTOM
OF COOLER
WASHER
NUT
DRAIN CAP
WATER
HOSE
CONNECTION
OPERATION
LOCATION
• When setting up the MasterCool MMBT unit in an outdoor location, take into consideration the following cautions:
CAUTIONS: Ensure power cord is secured and does not pose a tripping hazard.
Similarly, if using a water hose for constant water supply, lock unit casters, and
secure hose to reduce tripping hazard.
• If the unit is used in an enclosed area, ensure suffi cient outside air intake and
exhaust by opening windows or doors. Without a good source of outside air and an
outlet to exhaust the air, humidity will build up in the enclosed space and the unit
will not cool adequately.
CONTROLS
This unit can be used as a fan only or as an evaporative cooler. The six-position switch
allows for two speeds in fan mode (VENT), two speeds for COOL mode, a separate
PUMP position to pre-wet the pads, and an OFF position.
COOLING MODE:
1. If cooling pads are dry, place the knob in the PUMP ONLY position about 3 minutes to
allow the cooling pads to wet before turning on fan.
2. Turn the switch to either HIGH COOL or LOW COOL to start the fan in cooling mode.
NOTES: The pump will automatically turn on when the HIGH or LOW COOL position is
selected.
Use the LOW COOL setting whenever possible. This lower speed causes
the air to stay longer in the wet pads and therefore increases the cooling
effi ciency.
FAN ONLY MODE:
1. The HIGH VENT or LOW VENT positions will start the fan only, without water.
2
POWER
OFF
PUMP
ONLY
LOW
VENT
FLOAT ROD
HIGH
COOL
LOW
COOL
HIGH
VENT
110522-3
MAINTENANCE
WARNING:
ROUTINE MAINTENANCE
WEEKLY:
1. Drain and replenish water from the cooler at least weekly. This keeps the water in the pan fresh and helps prevent scale
and mineral deposit accumulation on the pads.
AT THE END OF THE SEASON OR DURING EXTENDED PERIODS OF NON-USE:
1. Completely drain the reservoir and disconnect water supply. Ensure no water remains during freezing weather.
2. Unplug unit from power supply.
3. Cover unit or store inside when not in use.
ANNUAL MAINTENANCE
1. Change Pads. Pads should be replaced once or twice a season, depending upon the length of the season. At the beginning and at
mid season a clean pad is more absorbent and effi cient and will deliver substantially cooler air.
a. Remove louvered side.
b. Unhook the wire pad holder.
c. Replace pad (some trimming may be necessary.)
d. Reattach the wire pad holders and replace louvered sides.
NOTE: These units come with synthetic cooling pads. Although aspen pads
can be used in these coolers, we recommend using synthetic pads
pads if using indoors, to reduce the incidence of shedding.
2. Clean pump. Cleaning the pump is necessary once a year at start-up.
CAUTION: Before cleaning pump, ensure unit is turned off and unit and
pump are unplugged.
a. Remove the pump from the mount slot.
b. Remove the base of the pump.
c. Clean the pump and turn the impeller to ensure free operation
d. Remove the pump spout and check for any blockage.
e. After cleaning, reinstall the base onto the pump. Press fi rmly to make sure it
is secure.
f. Reattach the pump to the mount in the cooler using the plastic retainer to
ensure that the pump will not overturn.
NOTE: Do not forget to replace the spout and water delivery tube onto the
pump outlet.
3. Oil blower bearings (MMBT14 only). The blower bearings should be oiled with a
few drops of non-detergent 20/30 weight at least oil once each year.
4. Oil motor bearing (MMBT12 only). The cooler motor in this unit should be oiled
with a few drops of non-detergent 20/30 weight oil once each year. The oil ports
are located on each side of the motor.
CAUTION: Do not over oil. Over oiling can cause motor burn out, due to
excessive oil getting into motor winding.
5. Check belt and belt tension. This applies only to model MMBT14 which is belt
driven. Model MMBT12 has a direct drive motor. Check the belt for any cracks or
wear and replace if necessary. Check the tension on the belt. A 3 lb. force should
defl ect the belt 3/4 inches. Readjust belt if needed.
Before doing any maintenance be sure power is off and unit is unplugged. This is for your safety.
over aspen
REMOVE BASE
BLOWER BEARING
IMPELLER
OIL PORT
Oil Motor
By following the operating, installation, and maintenance suggestions as outlined,
you can get many years of effi cient and satisfactory service from your cooler. In the
event additional information is desired, your dealer will be more than glad to assist
you in every possible way.
110522-3
3 LB. PRESSURE
3/4”
3
TROUBLESHOOTING
Problem Possible Cause Remedy
Failure to start or no air delivery
1. No electrical power to unit
• Fuse blown
• Circuit breaker tripped
• Electric cord unplugged or damaged
2. Belt too loose or tight
3. Motor overheated
• Belt too tight
• Blower bearings dry
4. Motor locked
1. Check power
• Replace fuse
• Reset breaker
• Plug in cords or replace if damaged
2. Adjust belt tension
3. Determine cause of overheating
• Adjust belt tension
• Oil blower bearings
4. Replace motor
Inadequate air delivery with
cooler running
Inadequate cooling
Motor cycles on and off
Noisy
Excessive humidity in house
Musty or unpleasant odor
Water draining from cooler
1. Insuffi cient air exhaust
2. Belt too loose
3. Pads plugged
1. Inadequate exhaust in house
2. Pads not wet
• Pads plugged
• Open spots in pads
• Trough holes clogged
• Pump not working properly
1. Low voltage
2. Excessive belt tension
3. Blower shaft tight or locked
4. Bearings dry
1. Bearings dry
2. Wheel rubbing blower housing
3. Loose parts
1. Inadequate exhaust
1. Stale or stagnate water in cooler
2. Pads mildewed or clogged
3. Pads not wetting properly
• Trough holes clogged
• Pump not working properly
1. Float arm not adjusted properly
2. Drain assembly leaking
pen windows or doors to increase air fl ow
1. O
2. Adjust belt tension or replace if needed
3. Replace pads
1.
Open windows or doors to increase air fl ow
2. Check water distribution system
• Replace pads
• Repack pads
• Clean trough and unplug holes
• Replace or clean pump
1. Check voltage
2. Adjust belt tension
3. Oil or replace bearings
4. Oil bearings
1. Oil bearings
2. Inspect and realign
3. Tighten loose parts
1. Open doors or windows
1. Drain pan and clean pads
2. Replace pads
3. Check water distribution system
• Clean
• Replace or clean pump
1. Adjust fl oat
2. Tighten nut and drain cap.
SPECIFICATIONS: MMBT12
DIMENSIONS
A
REA COOLED
MOTOR SPECS.
ELECT. SPECS.
WEIGHT (LBS)
RESERVOIR
H: 34-7/8” W: 32-5/8” D: 22-1/8”
UP TO 600 SQ.FT.
1/3 HP 2 SPEED 1145 CFM
115 VOLTS 8.1 AMPS
DRY: 96 OPERATING: 162H
8 GALLONS
SPECIFICATIONS: MMBT14
DIMENSIONS
A
REA COOLED
MOTOR SPECS.
ELECT. SPECS.
WEIGHT (LBS)
RESERVOIR
H: 38-7/8” W: 35-3/16” D: 29-9/16”
UP TO 1100 SQ. FT.80
1/2 HP 2 SPEED 1600 CFM
115 VOLTSTS 10.7 AMPS
DRY: 150 OPERATING: 242G
11 GALLONS
ELECTRICAL SCHEMATIC
(FOR REFERENCE ONLY)
WHITE - COMMON
4
2
SWITCH
B
PLAIN
A
RIBBED - COMMON
110522-3
GREEN
GREEN
BLACK - HIGH
BLACK
RED - LOW
WHITE - COMMON
GREEN - GROUND
3
1
BLOWER
MOTOR
PUMP
MOTOR
4
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