OPERATING INSTRUCTIONS
Guidelines and location
Always make sure that the roll-around unit is operated
on a solid, level surface strong enough to hold its weight
(Unit can weigh up to 500lb when full). Make sure the two
locking casters have been locked to prevent the cooler from
accidentally moving while in use. Use caution when rolling
the unit to avoid splashing or spilling of water. Unless the
move is for a short distance, it is best to drain the unit, move
it and then rell it in its new location. For best results:
• Turn pump on a few minutes before starting the fan, this
allows the pads to pre-wet and avoids a blast of warm air.
• Turn pump off a few minutes before turning the fan off.
This will allow the pads to dry out, helping to prevent stale
or musty odors the next time the unit is started.
• Whenever possible, operate the fan on low speed for
maximum cooling.
• When cooling is not required, you can operate this unit by
turning on the fan only (leaving the pump turned off).
Controls
Rocker-type control switches are used to select the
operating mode of the cooler. These switches control fan
speed (FAN-HIGH/OFF/LOW) and the pump operation
(COOL-ON/OFF). To eliminate a rush of warm air when
starting the cooler, be sure to turn the pump (COOL) on for a
few minutes before turning on the blower motor (FAN) in low
or high speed.
PAGE 4
Maintenance Schedule
Regular maintenance and periodic inspection is a key to
long and successful service of your MasterBlaster Cooler.
The cooler should be serviced at least once a year, or more
often if required. For maximum efciency, longer life and
appearance, every two months during operation, the cooler
should be inspected and cleaned. Drain water from the unit
every 8-10 hours of operation to minimize scaling build up.
CONTROL SWITCHES
Note: Do Not Undercoat the Water Reservoir
Your cooler's water reservoir is nished with our Peblar XT®
appliance-type nish. It is so hard that asphalt-type cooler
undercoating will not stick to it. Undercoating will break free,
clogging the pump and water distributor.
NOTE: Do not use cooler cleaners, cooler treatments or
other chemical additives in this evaporative cooler. Use of
any additives or water treatment will void your warranty and
impair the life of the cooler.
Before starting any maintenance operation, read thoroughly
all operating and maintenance instructions and observe all
cautions and warnings.
CAUTION: Disconnect all electrical power to the cooler by
removing plug from receptacle before attempting to install,
open, or service your cooler.
Even while routinely inspecting or servicing the inside, the
cooler can be accidentally started. Keep all personnel away
from the cooler and electrical supply when you are working
on it. Before servicing or cleaning unit, switch “COOL” and
“FAN” to the OFF position and remove power cord from
receptacle.
Cleaning
CAUTION: Never wash your cooler cabinet with a
garden hose; water may harm motor and pump. Motors
damaged by water are NOT covered under warranty.
All foreign materials, scale, salt deposits, lime, etc. can and
should be removed from bottom pan and other components.
Your cooler's long lasting nish can be brought to like-new
condition by using warm water and a soft cloth.
NOTE: Avoid using scouring pads, steel wool or wire
brushes, as these will damage the nish and encourage
corrosion.
Maintenance & Inspection
CAUTION: Disconnect all electrical power to the cooler
by removing the plug from the receptacle before
attempting to install, open, or service your cooler.
IMPORTANT: Before operating cooler at beginning of
each cooling season, turn cooler motor and pump motor
shafts by hand to make sure they turn freely. Failure to
do so may result in burning out motor.
Periodic inspection of your cooler will enhance the chance
for long, trouble-free service life. For maximum efciency,
every two months during operation, or any time the cooler is
opened, the cooler should be inspected. Some suggested
items:
• Check for leaks from pad frames, cabinet, etc.
• Are there any dry spots on the media when cooler is in
operation?
• Are bolts, nuts and set screws snug?
• Is bearing making unusual noises?
• Does the fan turn freely?
• Is oat level set correctly?
• Is water in the bottom pan clean?
• Belt condition / tension / alignment?
Set Screws, Bolts and Nuts
Check torque on set screws and cabinet hardware:
• Motor set screws (95 in-lbs.)
• Cabinet hardware (25 in-lbs)
Adjust Belt Tension
CAUTION: Disconnect all electrical power to the cooler
and insure that belt is not rotating before adjusting belt
tension.
Each time you inspect your cooler, be sure to check belt
tension on motor/fan assembly. Check belt condition and
replace it if frays or cracks appear. Check alignment of
blower pulley with motor pulley (see page 3).
Cleaning Water Pump & Hose
CAUTION: Do not allow pump to fall over and become
submerged; water will damage pump motor.
Clean water pump and hose assembly as follows:
1. Unplug pump cord, remove mounting bracket screw and
remove pump from cooler. Shake gently to remove water.
2. To prevent breakage, carefully release and remove
impeller base plate from the pump body.
3. Using a mild detergent solution and clean cloth, clean
deposits from pump screen, around impeller and base
plate.
4. Spin impeller to dislodge any foreign material.
5. Remove any foreign material in the adapter between
the pump and hose, or between the hose and the water
distributor assembly.
6. Rinse and reinstall impeller base plate.
7. Reinstall pump and reconnect pump cord.
PAGE 5
Draining
Drain the cooler cabinet (with power off) as follows:
1. Move cooler to the area appropriate to dump water.
2. Remove brass cap as shown in g. 2.
3. Drain, clean and dry reservoir.
Alternative draining options for units that will not be moved
frequently:
1. Remove brass cap as shown in g. 2.
2. Attach suitable size hose and route it to the desired drain
area.
3. Put a cap on the end of the hose.
4. Drain every 8-10 hours of operation.
Touch-Up
The hardness, adhesion and smoothness of the internal and
external nish on your cooler makes it extremely unlikely
that scratches or chipping will occur. In the event that nish
damage does occur, it
1. Sand the area around bare metal spots.
2. Prime and paint with a quality paint.
Do not use asphalt type cooler undercoat material in water
reservoir. Undercoat will break free, clogging the pump and
water distributor.
LUBRICATION
Motor Bearings
Some motors used in MasterBlaster coolers have ports for
lubricating the motor and are oiled at the factory. If the need
for oiling is indicated, see the motor nameplate for specic
instructions on re-lubricating the motor. Under normal
use, these motors require oiling about every 12 months of
operation. Do Not Over-Oil.
Fan Shaft Bearing/Pump Bearings
Fan shaft bearings are sealed and do not require oiling. The
pump motor bearings are permanently lubricated
Cleaning or Replacing Media Pads
CAUTION: Disconnect all electrical power to the cooler
before attempting to install, open, or service your cooler.
The condition of your cooler pads should be checked
at least once a year; at the beginning of the season is
best. However, your pads may need to be checked more
frequently, depending on local air and water conditions. For
instance, in areas where mineral content of the water is high
or the air is dusty, deposits may build up in the cooler pads,
restricting airow. Clean or replace pads as follows:
1. Disconnect power from unit.
2. Remove pads from wet section cabinet as follows:
should be promptly repaired by the
