Adobe Aire MC44B, MC63B, MC63C, HC64B, HC43A Installation Guide

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

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

Troubleshooting ........................................................................................................ 7

Getting the most from your cooler ...................... t................................................... 7

2 • MastetCooP II

Motor .................................................................................................. 6

Pump .................................................................................................. 6

Float .................................................................................................... 6

Bleed-Off ........................................................................................... 6

Maintenance ....................................................................................... 7

Add-On Coolers .................................................................................. 7

Insulation ............................................................................................ 7

Multi-Speed Motor .............................................................................. 7

Attic Vents .......................................................................................... 7

Thermostat Control .......................................................................... 3,7

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 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 liftingthe cooler in place.

Make sure the mounting sudt_ceis level

in all directions.

• Makesure anyductworkandelectrical

needscomplywithlocal,state,county,
and federalcodes.

Caution: Aft electrical in-
with local buflding and

safety codes, and must be
stallations must comply
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.

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 for the
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 motorface plate (see Figure

2). Belttensionshould be ad usted sothe
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

F/gure 3

AE_IUSTNENT

BRACKET

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 of the unit). For models
MC63 or MC64 our #785 leg kit, soldsepa-
rately as an accessory, willadequately sup-

Figure t

230 VOLT INSTALLATION

MasterCoot _ I/, 3