OWNER’S MANUAL
MIRACOOL™ GLASS DOOR MERCHANDISER
260L - 1300L
a79-15
1300L
300L
750L
a79-14
a79-13
Sales Office:
P.O. Box 5932
Spartanburg, S.C. 29304-5932
Technical Service: 1-800-558-7627
Parts Order Fax: 1-800-262-9381
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Printed in Mexico
6-06
79BC560002-01_C
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FLUORESCENT LAMP SIGNBOARD
(SIZES 750L, 1100L, AND 1300L ONLY)
UNIT DATA LABEL
(INSIDE COOLER IN UPPER
LEFT CORNER)
SHELF
PRODUCT CHAMBER
CARTRIDGE COMPARTMENT
INTERNAL FLUORESCENT LAMP —
SIZE 750L
(SIZE 260L, 300L — ALONG TOP;
SIZE 1100L, 1300L — IN CENTER)
SERVICE
CORD
FRONT GRILLE
LEVELING FOOT
WOOD SKID
REAR VIEW
FRONT VIEW
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LIGHTING CORD
(RIGHT CONNECTOR)
POWER CORD
(LEFT CONNECTOR)
WOOD SKID RETAINING SCREW,
IF USED (HEX HEAD BOLT SCREW)
GRILLE RETAINING SCREW
UNIT WITH FRONT GRILLE REMOVED
FIGURE 1 — MIRACOOL™ BOTTLE COOLER UNIT COMPONENTS (Size 750L Shown)
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UNPLUG CARTRIDGE POWER
AND LIGHTING CORDS
LEVEL UNIT
To provide adequate condensate drainage and proper
door alignment and operation of unit, the unit cabinet
must be level. Leveling feet are factory installed.
Remove refrigeration system cartridge for easier
access to back feet.
Before servicing unit, disconnect electrical service.
On sizes 1100L and 1300L, turn disconnect switch
(located on power cord) to the OFF position. Failure
to disconnect electrical service could result in elec-
trical shock and cause personal injury or death.
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„ TO REMOVE CARTRIDGE
CUT WIRE TIE THAT SECURES
LIFTING RODS TO BASE
1. After disconnecting the unit from the power
supply, remove the grille retaining screw located
in the upper-most part of the grille. (See Figure 1.)
2. Lift the grille up and away from the unit.
3. Unplug the power supply and lighting supply
cords located in the front of the cartridge
(Figure 2).
FIGURE 2 — PREPARE CARTRIDGE FOR REMOVAL
4. Using a pair of wire cutters, cut wire tie that
secures lifting rods at center of front base rail.
(See Figure 2.)
CARTRIDGE POWER
AND LIGHTING CORDS
5. Take hold of the end of each lifting rod and rotate
each approximately 90-degrees upward so that
they are nominally vertical (Figure 3.) The car-
tridge should be disengaged from the cabinet and
resting on the base of the cabinet assembly. Han-
dling holes are located on either side of the car-
tridge near the top and along the side of the
cartridge (Figure 4). Grasp the cartridge by these
holes and slide the unit forward from the cabinet
until the cartridge is free. Use caution to ensure
that power and electrical cords do not get pinched
between the cartridge and cabinet while removing
cartridge.
„ TO LEVEL UNIT — The door is equipped with
gravity assisted cams and will not function properly
without proper leveling of cabinet. Adjust feet using
adjustable wrench so that unit sits approximately
level to floor and door closes properly. For best door
operation, adjust leveling feet so that cabinet has
a 1/16-in. rake or slant from front to back. Optional
casters are available to replace leveling feet.
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FIGURE 3 — ROTATE LIFTING WIRES IN
DIRECTION SHOWN
NOTE: If casters are not used, local codes may require
cabinet to be sealed around the perimeter of the cabi-
net base. Consult local sanitation codes. Use only seal-
ant material approved for this use, such as Dow
Corning #732.
PULL THE CARTRIDGE USING
THE HANDLING HOLES ON SIDES
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FIGURE 4 — REMOVE CARTRIDGE
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TOP TAB
FULLY INSERTED
INTO SLOT
INSTALL SHELVES
Product shelves and a bag containing shelf support
clips are packed inside the unit. Refer to Table 1 to
verify quantity of shelves and shelf supporting clips.
Bottom shelf must be placed on interior floor and
should be inserted into the two retainer clips provided
at the rear corners of the unit floor.
BOTTOM TAB
FULLY SEATED
IMPROPERLY INSTALLED
CLIP (UPSIDE DOWN)
Improper shelf clip installation may cause shelf and/
or product to fall which could result in personal
injury or damage to the unit.
PROPERLY INSTALLED CLIP
RETAINING TAB
Do not overload the shelves. The unit is designed to
use all the shelves provided, installed in equally
spaced configuration. Failure to install shelves cor-
rectly could result in personal injury or damage to
the unit. If fewer shelves or a different installation
configuration is desired, contact the manufacturer to
ensure that shelf overloading will not occur.
TOP TAB
SHELF CLIP
„ TO INSTALL SHELVES — Refer to Figures 5 and 6.
1. Determine proper location for shelf clips. Refer to
the numbers on the pilaster to ensure that all
clips are properly located.
2. Insert top tab of the shelf clip into the desired hole
of the pilaster. The retaining tab should be facing
upward as shown in Figure 5.
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BOTTOM TAB
FIGURE 5 — SHELF CLIP INSTALLATION
PILASTER
3. Rotate the clip downward and insert the bottom
tab into the appropriate hole on the pilaster.
If necessary, squeeze the clip slightly during
installation.
SHELF
RETAINED
BY TAB
4. Install all remaining clips as described above.
5. Install shelves onto clips so that the product
retention bar is facing upward. Be careful not to
dislodge clips during shelf installation.
6. Shelves must be placed so that the retaining tab
on the shelf clip captures the shelf as shown in
Figure 6.
7. Before loading the shelf, ensure that the shelf is
resting on each of 4 clips and that the clips are
installed as shown in Figures 5 and 6.
PRODUCT
RETENTION BAR
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FIGURE 6 — PROPER INSTALLATION OF
SHELF ON CLIP
CONDENSATE DISPOSAL
The evaporator drain pan is located in the base of the
cartridge. Airflow in cartridge compartment hastens
condensate evaporation so that external drain plumb-
ing is not required.
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To achieve proper lamp engagement, rotate the lamp
90 degrees from its insertion position until it snaps or
clicks into place.
On units without safety shields, visually verify proper
lamp installation by checking the identification mark
on the end of the bulb. If the bulb has been properly
installed, the mark will be centered between the
“halves” of the lamp holder. Refer to Figure 7.
START-UP
PRELIMINARY CHECKS
„ BI-PIN FLUORESCENT LAMP INSTALLATION/
VERIFICATION — Before applying power to the unit,
verify that all lamps have been properly installed and
are fully engaged in the lamp holders. Sizes 750L,
1100L, and 1300L have 2 lamps, one in the signboard
and one inside the cooler. Sizes 260L and 300L have
one lamp inside the cooler.
On units with safety shields, the identification mark
cannot be seen. (See Figure 8.) Verify manually that
the lamp has been rotated and locked into place.
Improperly installed lamps may cause damage to
the lighting circuit. Carrier will not be responsible
for equipment or component failures or other dam-
ages or losses that arise as a result of improper lamp
installation.
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BI-PIN LAMP END IDENTIFICATION MARK
Properly installed lamp without shield. Verify
identification mark is positioned as shown.
FIGURE 7 — CHECK INSTALLATION OF LAMP WITHOUT SAFETY SHIELD
PINS MAY NOT BE VISIBLE IN
ACTUAL INSTALLATION
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Improperly installed lamp with
shield. Note that pins have not
achieved full 90° rotation.
Properly installed lamp with shield.
Requires manual verification that
lamp has been rotated and locked
into place.
FIGURE 8 — CHECK INSTALLATION OF LAMP WITH SHIELD
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„ ELECTRICAL SUPPLY AND CONNECTIONS —
Check to be sure that the electrical service to the unit
meets all local and national electrical codes. Unit elec-
trical data is shown in the unit data label, located on
the inside of the cabinet in the upper lefthand corner.
Review this label before initiating electrical service.
Voltage range of power supply to unit should be 105 to
125 volts. Refer to Table 2 for unit data.
INITIAL START-UP
„ POWER SUPPLY — Connect unit to power supply.
On sizes 1100L and 1300L, turn disconnect switch to
the ON position. Check to verify that the compressor,
lamp, and fans are running.
IMPORTANT: Low line voltage is often the cause of
service complaints. Check to see that the line volt-
age is within specified range with the unit running.
NOTE: Other motors or heavy appliances should not
be used on the same circuit with the cooler.
See Figure 1 for location of service cord.
„ TEMPERATURE CONTROL — The temperature
control knob is located in the front power panel. See
Figure 9. Unit is factory set at the number 4 position
(normal), which will maintain the product at approxi-
mately 38 F. For colder temperature, turn the black
adjustment knob to a higher setting. Adjust tempera-
ture control in small increments, one position at a
time.
Before servicing unit, disconnect electrical service.
On sizes 1100L and 1300L, turn disconnect switch
(located on power cord) to the OFF position. Failure
to disconnect electrical service could result in elec-
trical shock and cause personal injury or death.
Allow 24 hours between temperature control adjust-
ments. Excessive tampering with temperature con-
trol could lead to service difficulties.
If an extension cord is necessary, use only three-
wire grounding type. The use of ungrounded cords or
overloaded circuit voids compressor warranty.
NOTE: For operation above 3,000-ft altitude, ther-
mostat should be adjusted by a qualified service
technician.
TABLE 2 — UNIT DATA
MC260,
MC300
MC1100,
MC1300
UNIT
MC750
Voltage
Nominal
Range
115
105-125
115
105-125
115
105-125
Frequency
Total Amps
60
4.6
60
8.9
60
10.6
Refrigerant Type
Charge Amount (oz)
R-134A
4.3
R-134A
7.5
R-134A
14.5
Design Pressure
High Side (psig)
Low Side (psig)
220
88
265
93
222
88
TEMPERATURE
CONTROL KNOB
a79-9
FIGURE 9 — TEMPERATURE CONTROL KNOB
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SERVICE AND TROUBLESHOOTING
„ CARTRIDGE REMOVAL
REFRIGERATION SYSTEM
SERVICE
COMPONENTS
The Carrier Miracool™ refrigeration system consists
of a hermetically sealed compressor and finned evapo-
rator and condenser coils.
Before servicing unit, disconnect electrical service.
On sizes 1100L and 1300L, turn disconnect switch
(located on power cord) to the OFF position. Failure
to disconnect electrical service could result in elec-
trical shock and cause personal injury or death.
„ CONDENSER — The condenser has wide finned
spaces, which allow more air passage with less dirt or
dust accumulation. The condenser still requires peri-
odic cleaning for maximum efficiency.
1. After disconnecting the unit from the power
supply, remove the grille retaining screw located
in the upper-most part of the grille. (See Figure 1.)
„ CONDENSER FAN MOTOR — The condenser fan
motor assembly is mounted between the condenser
and the compressor. Air is drawn through the con-
denser, over the body of the compressor and out the
rear of the unit compartment.
The motor is wired to cycle with the compressor but
will continue to operate should the compressor cut out
on the overload. (The motor is permanently lubricated;
therefore, oiling is not required.)
2. Lift the grille up and away from the unit.
3. Unplug the power supply and lighting supply
cords located in the front of the cartridge
(Figure 2).
4. Using a pair of wire cutters, cut wire tie that
secures lifting rods at center of front base rail.
(See Figure 2.)
5. Take hold of the end of each lifting rod and rotate
each approximately 90-degrees upward so that
they are nominally vertical (Figure 3). The car-
tridge should be disengaged from the cabinet and
resting on the base of the cabinet assembly. Han-
dling holes are located on either side of the car-
tridge near the top and along the side of the
cartridge (Figure 4). Grasp the cartridge by these
holes and slide the unit forward from the cabinet
until it is free. Use caution to ensure that power
and electrical cords do not get pinched between
the cartridge and cabinet while removing
cartridge.
„ DRIER — The drier is installed in the system just
before the capillary tube. The drier traps minute parti-
cles of foreign material and absorbs any moisture in
the system.
„ LIQUID CONTROL AND HEAT EXCHANGER —
Liquid refrigerant control to the evaporator of the
system is accomplished by the use of a capillary tube.
This capillary tube is soldered to the suction line to
form a heat exchanger, which subcools the liquid
refrigerant to maintain high efficiency within the
system.
Before servicing unit, disconnect electrical service.
On sizes 1100L and 1300L, turn disconnect switch
(located on power cord) to the OFF position. Failure
to disconnect electrical service could result in elec-
trical shock and cause personal injury or death.
8
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„ EVAPORATOR COMPARTMENT (Interior top area)
— All serviceable parts are directly accessible from the
top of the cartridge compartment.
„ CHARGING REFRIGERATION SYSTEM — Refer to
Table 2 for refrigerant type and amount of charge.
Since capillary tube systems have small critical refrig-
erant charges, it is recommended that a field charge
either be weighed in or transferred from a portable
charging cylinder. After maximum vacuum has been
obtained as detailed above, attach charging cylinder to
the system line making sure to purge air from hose
with refrigerant. With the unit running, allow refrig-
erant to run slowly into the system until the desired
charge is reached. When using refrigerant blends it is
recommended to charge into the high side of the sys-
tem with the initial charge and then add any remain-
ing charge into the suction side; however, care must
be taken to meter the remaining amount into the
low side so that excess liquid does not enter the
compressor.
„ COMPRESSOR COMPARTMENT (Bottom rear
area) — Access to compressor compartment requires
removal of the side panel of the cartridge. Condenser
fan access also requires removal of a side panel. Side
panels are secured with 5 Phillips screws. After tubing
and electrical connections are removed, compressor
replacement requires removal of four clips securing
compressor to the base.
Before servicing unit, disconnect electrical service.
On sizes 1100L and 1300L, turn disconnect switch
(located on power cord) to the OFF position. Failure
to disconnect electrical service could result in elec-
trical shock and cause personal injury or death.
„ TROUBLESHOOTING — Refer to Table 3 and
Figures 10-12.
„ EVACUATION — Moisture in a refrigeration system
may affect performance.
When large amounts of moisture are present, system
freeze ups will occur. Even in minute amounts, mois-
ture will combine with refrigerants to form an acid.
The corrosive action of this acid forms sludge, which
will plug the lines and drier.
Since most field type vacuum pumps cannot pull a low
enough vacuum to remove all moisture from the sys-
tem, it is recommended that the system be triple evac-
uated, breaking each time with dry refrigerant
nitrogen. Use care to purge air from the charging hose
when breaking the vacuum.
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TABLE 3 — REFRIGERATION SYSTEM SERVICE AND ANALYSIS CHART
(Refer to Figures 10-12 for wiring diagrams)
MALFUNCTION
POSSIBLE CAUSE
SOLUTION
1. Plug in the cord.
Compressor Will Not Start —
No Hum.
1. Line cord not plugged in.
2. Power disconnect switch in OFF position. 2. Turn disconnect switch to ON position.
(Sizes 1100L and 1300L only.)
3. Fuse removed or blown.
4. Overload protector tripped.
5. Temperature control stuck in open
position.
3. Replace fuse.
4. Refer to electrical section.
5. Repair or replace temperature control.
6. Wiring improper or loose.
6. Check wiring against diagram.
Compressor Will Not Start — Hums 1. Low voltage to unit.
1. Determine reason and correct.
2. Determine reason and correct, replace if
necessary.
3. Determine reason and replace.
4. Check wiring against diagram.
but Trips on Overload Protector.
2. Relay failing to close.
3. Starting capacitor defective.
4. Improperly wired.
Compressor Starts but Does Not
Switch Off of Start Winding.
1. Low voltage to unit.
2. Relay failing to open.
1. Determine reason and correct.
2. Determine reason and correct; replace if
necessary.
3. Run capacitor defective.
4. Compressor motor winding is open or
shorted.
3. Determine reason and replace.
4. Determine cause, correct, and replace
compressor.
Compressor Starts and Runs, but 1. Additional current passing through over-
1. Check wiring diagram. Check for added
fan motors, pumps, etc. connected to
wrong side of protector.
Short Cycles on Overload
Protector.
load protector.
2. Low voltage to unit.
2. Determine reason and correct.
3. Check current, replace protector.
4. Determine reason and replace.
5. Check ventilation, restrictions in cooling
medium, restrictions in refrigeration
system.
3. Overload protector defective.
4. Run capacitor defective.
5. Excessive discharge pressure.
6. Compressor too hot — return gas hot.
6. Check refrigerant charge; fix leak if neces-
sary. Check airflow across condenser.
Unit Runs, but Short Cycles.
1. Overload protector.
2. Cold control.
1. Check wiring diagram for correct wiring.
2. Differential set too close.
3. Overcharge.
3. Reduce refrigerant charge.
4. Air in system.
5. Undercharge.
4. Recover and recharge.
5. Fix leak and recharge with refrigerant.
Unit Operates Long or
Continuously.
1. Dirty condenser.
1. Clean condenser.
2. Shortage of refrigerant.
2. Fix leak, add charge, correct charge.
3. Replace Temp control.
4. Defrost.
3. Temp control contacts stuck or frozen.
4. Evaporator coil iced.
5. Restriction in refrigeration system.
5. Determine location and remove.
Start Capacitor Open, Shorted or
Blown.
1. Relay contacts not opening properly.
2. Low voltage to unit.
3. Improper relay.
1. Replace relay.
2. Determine reason and correct.
3. Replace.
Run Capacitor Open, Shorted or
Blown.
1. Improper capacitor.
2. Excessively high line voltage (110% of
rated max).
1. Determine correct size and replace.
2. Determine reason and correct.
Relay Defective or Burned Out.
1. Incorrect relay.
1. Check and replace.
2. Line voltage too high or too low.
2. Determine reason and replace.
3. Relay being influenced by loose vibrating 3. Remount rigidly.
mounting.
Space Temperature Too High.
1. Control setting too high.
1. Reset control.
2. Overcharged with refrigerant.
2. Recover refrigerant and recharge with
proper charge specified on dataplate.
3. Improve air movement.
3. Inadequate air circulation.
Cooler Freezing Beverage.
Unit Noisy.
1. Temperature control knob set too high.
1. Reset control.
1. Loose parts or mountings.
2. Tubing rattle.
3. Bent fan blade causing vibration.
4. Fan motor bearings worn.
1. Find and tighten.
2. Reform to be free of contact.
3. Replace blade.
4. Replace motor.
NOTE: All servicing must comply with state and federal regulations.
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a79-10
FIGURE 10 — WIRING DIAGRAM, SIZES 260L, 300L
11
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a79-12
FIGURE 11 — WIRING DIAGRAM, SIZE 750L
12
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a79-11
FIGURE 12 — WIRING DIAGRAM, SIZES 1100L, 1300L
13
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CABINET EXTERIOR
MAINTENANCE
Cabinets should be cleaned with a solution of mild
soap and water or mild household cleaner. Do not use
caustic soap or abrasive cleaners, since these might
damage the cabinet finish. If stainless steel surface
becomes discolored, scrub by rubbing only in direction
of the finish grain. Do not use steel wool or rusting
may occur. Refer to Table 4.
LAMP REPLACEMENT
Before proceeding with replacement, disconnect
electrical service. Failure to unplug unit could result
in serious personal injury or death.
INTERIOR SURFACE
The inside of the cabinet is coated with baked-on
epoxy. To clean, use a mild soap and water solution or
mild household cleaner.
Remove lamp by rotating lamp 90 degrees to align
lamp pins with holder slots. Refer to Bi-Pin Fluores-
cent lamp Installation/Verification section on page 6.
CONDENSATE REMOVAL
The evaporator drain pan is located in the base of the
cartridge. In general, the condensate disposal system
is maintenance free.
CONDENSER
The condenser should be inspected periodically for
accumulation of debris, which should be removed. A
vacuum cleaner or brush can be used to remove debris.
14
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TABLE 4 — METHODS FOR CLEANING STAINLESS STEEL
METHOD OF
CLEANING AGENT*
TASK
Routine Cleaning
EFFECT ON FINISH
APPLICATION†
Soap, ammonia or detergent and
Sponge with cloth, then rinse with
clear water and wipe dry.
Satisfactory for use on all finishes.
water
Stubborn Spots and Stains,
Caked-on Splatter, and other
Light Discolorations
Revere Ware, Goddard’s, Twinkle,
Apply with damp sponge or cloth.
Satisfactory for use on all finishes if
rubbing is light. Use in direction of
polish lines.
or Cameo stainless steel cleaner or Rub with damp cloth.
Soft Scrub cleaner
Household cleansers, such as Old Rub with a damp cloth. May contain Use in direction of polish lines.
Dutch, Bon Ami, Ajax, Comet
chlorine bleaches. Rinse thoroughly May scratch or dull highly polished
after use.
finishes.
Heat Tint or Heavy Discoloration Revere Ware or Goddard’s stain-
Apply with damp sponge or cloth.
Use in direction of polish lines.
May scratch or dull highly polished
finishes.
less steel cleaner
Caked-on Foods and Grease,
Fatty Acids Milkstone (where
swabbing or rubbing is not
practical)
Easy-Off oven cleaner
Apply generous coating. Allow to
stand for 10 to 15 minutes. Rinse.
Repeated application may be
necessary.
Excellent removal. Satisfactory for
use on all finishes.
Hard Water Spots and Scale
Vinegar
Swab or wipe with cloth. Rinse with Satisfactory for use on all finishes.
water and dry.
*Use of brand names is intended only to indicate a type of cleaner and
does not constitute an endorsement; nor does the omission of any
brand name cleaner imply its inadequacy. Many products named are
regional in distribution and can be found in local supermarkets, depart-
ment and hardware stores.
†All products should be used in strict accordance with instructions on
package.
NOTES:
1. Use the mildest cleaning procedure that will do the job efficiently and
effectively.
2. Always rub in the direction of polish lines for maximum effectiveness
and to avoid marring the surface.
3. Use only a soft cloth, sponge, fiberous brushes, plastic or stainless
steel pads for cleaning and scouring.
4. Rinse thoroughly with fresh water after every cleaning operation.
5. Always wipe dry to avoid water marks.
6. Never use common steel wool pads; these will cause rust!
15
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Copyright 2006 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Printed in Mexico
6-06
79BC560002-01_C
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