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Installation and Start-Up
Read carefully
before installing
your MasterCo'bl
evaporative
cooler.
To install the unit the following tools are
needed:
•
5/32" hex key allen wrench
•
Channel locks
•
Pliers
• Adjustable wrenches
• Tubing cutter
• Screwdrivers
• Hammer
•
1/4" Socket wrench
• 7/16" Socket wrench
Before
attempting
to install the cooler,
make sure the following preparations have
been made:
•
Assure that the mounting surface rs
strong enough to bear the weight of the
cooler when in use; remember that
when the system fills with 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 lifting the cooler in place.
•
Make sure the mounting surface is level
in all directions.
•
Make sure any ductwork and electrical
needs comply with local, state, county,
and federal codes.
Caution: All electrical in-
stallations must comply
with local building and
safety codes, and must be
performed by quafified
personnel only.
Mounting
The blower module and the media module
can be separated
before mounting by re-
moving four bolts and one shipping screw
-see drawing below.
B°lts_
w
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
18". 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 of the unit). For models
MC63 or MC64 our #785 leg kit, sold sepa-
rately as an accessory, will adequately sup-
port the unit and secure it to the roof For
High-Performance
models HC43. HC44
HC63 and HC54 we recommend that a fuji
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 for these mods!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 roof. (See Figure ! ). 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 CCl000A.
Complete
installa-
tion instructions
are furnished
with the
CCl000A
Kit. For electrical
connections
to a rotary wall switch, use the following
instructions:
Locate the junction box installed in the dry
module. Junction
box is to be installed
with the receptacle
facing
away from
the pad. Make cedain all electrical cords
are clear of the belt, water, pulleys and
blower
wheel.
Note that there are two
plug-ins, one for the motor and one for the
pump. The building power supply must be
connected to this junction box to provide
power to the motor and pump. The wiring
diagram in Figure 1 shows how the junc-
tion 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 all 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 MasterCool
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 with the motor face plate (see Figure
2). Belt tension should be adjusted sothe
belt will deflect 1/2 to 3/4inch at the center
of the span per Figure 3. Re-adjust belt
tension after any pulley adjustment. Re-
place worn or damaged belts.
Rgu., 2
MOTOR STRAPS
SUPPORT BRACKETS
ADJUSTMENT
BRACKET
Figure
3
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