Culligan MEDALLIST SERIES, MEDALLIST 8"", MEDALLIST 30 3, MEDALLIST 45 3 Service Manual
Cat. No. 01882311
Rev. D 09/17/02
DCO # 4625
Service
Manual
CULLIGAN
MEDALLIST SERIES
AUTOMATIC
WATER CONDITIONER
MODELS FROM 2002
™
©2002 Culligan International Company
Printed in USA
Attention Culligan Customer:
The installation, service and maintenance of this equipment should
be rendered by a qualied and trained service technician. Your local
independently operated Culligan dealer employs trained service
and maintenance personnel who are experienced in the installation,
function and repair of Culligan equipment. This publication is written
specically for these individuals and is intended for their use.
We encourage Culligan users to learn about Culligan products, but
we believe that product knowledge is best obtained by consulting
with your Culligan dealer. Untrained individuals who use this manual
assume the risk of any resulting property damage or personal
injury.
WARNING - PRIOR TO SERVICING EQUIPMENT,
DISCONNECT POWER SUPPLY TO PREVENT ELECTRICAL
SHOCK.
WARNING - IF INCORRECTLY INSTALLED, OPERATED
OR MAINTAINED, THIS PRODUCT CAN CAUSE SEVERE
INJURY. THOSE WHO INSTALL, OPERATE, OR MAINTAIN
THIS PRODUCT SHOULD BE TRAINED IN ITS PROPER
USE, WARNED OF ITS DANGERS, AND SHOULD READ
THE ENTIRE MANUAL BEFORE ATTEMPTING TO INSTALL,
OPERATE OR MAINTAIN THIS PRODUCT.
IF THIS EQUIPMENT IS TO BE USED IN THE
TREATMENT OF DRINKING WATER, THE WATER
MUST BE MICROBIOLOGICALLY SAFE.
CULLIGAN
Service
Manual
MEDALLIST SERIES
AUTOMATIC
WATER CONDITIONER
MODELS FROM 2002
Table of Contents
Introduction ................................................................ 2
Specications ............................................................ 3
Familiarization ........................................................... 4
Settings...................................................................... 7
Programming ............................................................11
Manual Cycling ........................................................ 15
Service Check ......................................................... 16
Board Diagnostics ................................................... 17
Parts Replacement Guide ....................................... 19
Troubleshooting Guide ............................................ 23
Wire Diagram ........................................................... 26
Flow Rate and Drain Line Charts ............................ 27
Flow Charts ............................................................. 29
Parts List..............................................................34
™
Page
Introduction
The Culligan Medallist Series™ Water Softeners are tested and validated by
WQA and certied by UL against ANSI/NSF Standard 44 for the effective reduction of calcium and magnesium along with Barium and Radium 226/228*.
Because the ability of the unit to remove Barium and Radium is based upon
reducing hardness to less than 1 gpg, effective hardness reduction should be
ANSI/NSF 44
Water Softener
81WN
periodically veried. Hardness sample kits are available through your local Culligan Dealer.
For installations in Massachusetts, Massachusetts Plumbing Code 248 CMR shall be adhered to. Consult
your licensed plumber for installation of this system.
SAFE PRACTICES
Throughout this manual there are paragraphs set off by special headings.
NOTICE: Notice is used to emphasize installation, operation or maintenance information which is important, but
does not present any hazard.
Example: NOTICE: The nipple must extend no more than 1 inch above the cover plate.
CAUTION: Caution is used when failure to follow directions could result in damage to equipment or
property. Example:
CAUTION: Disassembly while under water pressure can result in ooding.
WARNING: Warning is used to indicate a hazard which could cause injury or death if ignored. Example:
WARNING! ELECTRICAL SHOCK HAZARD! UNPLUG THE UNIT BEFORE
REMOVING THE COVER OR ACCESSING ANY INTERNAL CONTROL PARTS.
SERIAL NUMBERS
The control valve serial number is located on the back of the control.
The media tank serial number is located on the top surface of the tank.
NOTICE: Do not remove or destroy the serial number. It must be referenced on request for warranty repair or
replacement.
This publication is based on information available when approved for printing. Continuing design renement
could cause changes that may not be included in this publication.
* Veried utilizing hardness surrogate per ANSI/NSF Standard 44.
2 CULLIGAN MEDALLIST SERIES
Specications
CULLIGAN MEDALLIST SERIES WATER CONDITIONER WITH TIMECLOCK OR SOFT MINDER METER
8" MODEL 303 MODEL 453 MODEL
Control Valve Type 5-cycle Reinforced 5-cycle Reinforced 5-cycle Reinforced
Thermoplastic Thermoplastic Thermoplastic
Overall Conditioner Height 51 in 49 in 63 in
1,295 mm 1,245 mm 1,600 mm
Media Tank Dimensions (Dia. x Ht.) 8 x 44 in 10 x 40 in 10 x 54 in
203 x 1,118 mm 254 x 1,016 mm 254 x 1,372 mm
Salt Storage Tank Dimensions 16 x 43 in 18 x 43 in 18 x 43 in
(Dia. x Ht.) 457 x 1,092 mm 457 x 1,092 mm 457 x 1,092 mm
18 x 43 in
457 x 1,092 mm
Exchange Media, Type and Quantity Cullex® Media, 0.7 ft3 Cullex Media, 1.0ft3 Cullex Media, 1.5 ft
Underbedding, Type and Quantity Cullsan® Underbedding, Cullsan Underbedding, Cullsan Underbedding,
6 lb. 8 lb. 8 lb.
Exchange Capacity 18,300 gr @ 4 lb 20,200 gr @ 5.0 lb 24,900 gr @ 6 lb
@ Salt Dosage Per Recharge
1
25,100 gr @ 9.0 lb 29,400 gr @11 lb 39,200 gr @14 lb
27,500 gr @ 12 lb 35,000 gr @17 lb 43,500 gr @ 20 lb
Efciency at Rated Sales Dosage5 4 lb. salt dosage: 5 lb. salt dosage 6 lb. salt dosage
4570 gr./lb. 4050 gr./lb. 4150 gr./lb.
Freeboard to Media2 20.5 - 21.5 in 17 - 18 in 19.75 - 21.75 in
Freeboard to Underbedding
3
42.0 - 42.5 in 39.6 - 40.1 in 53.8 - 54.3 in
Salt Storage Capacity 250 lb or 375 lb 375 lb 375 lb
Rated Service Flow @ Pressure Drop 5.9 gpm @ 12 psi 7.2 gpm @ 12 psi 7.0 gpm @ 13 psi
Total Hardness, Maximum 75 gpg 99 gpg 99 gpg
Total Iron, Maximum (dissolved) 5 ppm 5 ppm 5 ppm
Hardness to Iron Ratio, Minimum 8 gpg to 1 ppm 8 gpg to 1 ppm 8 gpg to 1 ppm
140 mg/L to 1 mg/L 140 mg/L to 1 mg/L 140 mg/L to 1 mg/L
Operating Pressure 20 - 125 psi 20 - 125 psi 20 - 125 psi
140 - 860 kPa 140 - 860 kPa 140- 860 kPa
Operating Pressure (Canada) 20 - 90 psi 20 - 90 psi 20 -90 psi
140 - 620 kPa 140 - 620 kPa 140 - 620 kPa
Operating Temperature 33 - 120°F 33 - 120°F 33 - 120°F
1 - 50°C 1 - 50°C 1 - 50°C
Electrical Requirements 24V/60 Hz 24V/60 Hz 24V/60 Hz
Electrical Power Consumption, Min./Max. 3 Watts/35 Watts 3 Watts/35 Watts 3 Watts/35 Watts
Drain Flow, Maximum4 1.1 gpm 2.0 gpm 2.1 gpm
Recharge Time, Average 85 min 64 min 64 min
Recharge Water Consumption 23.3 gal 61 gal 65 gal
1 Capacities and corresponding salt dosages pertain to low hardness waters. Capacities given per recharge
2 Measured from top of media to top of inlet tting (backwashed and drained)
3 Measured from top of underbedding to top of inlet tting
4 Backwash at 120 psi (830 kPa)
5 Efciency rating only valid at stated salt dosage on Soft-Minder® models and is efciency rated according to ANSE/
NSF Standard 44.
3
SPECIFICATIONS 3
Familiarization
CONTROL
The Culligan Medallist Series™ water softener uses the same power valve control as in our Culligan® Mark 89/812
models. It can be programmed as either a time clock or Soft-Minder® meter model. Each model has its own programming parameters which can be set to control the operation and regeneration of the system. These functions are
outlined in Table 1.
TABLE 1
Function Time Clock Soft-Minder Meter
Time of Day YES YES
Time of Regen. YES YES
Salt Dosage YES YES
Backwash Time YES YES
Brine Rinse Time YES YES
Gallons Capacity/Regen. Interval YES YES
Forced Regen. Interval NO YES*
Lock/Unlock display YES YES
* When Time Clock Backup is set to "ON".
CIRCUIT BOARD
The AccuSoft™ microprocessor circuit board controls every function of the Culligan Medallist Series water
softener. This board has several unique features which allows it to perform a variety of functions. Familiarization of
the board is essential for a thorough understanding of the softener.
The AccuSoft circuit board has a set of default settings that the microprocessor will reset to whenever a meter is
attached or removed from the control. Table 2 is a list of the default microprocessor settings.
It is recommended to always disconnect the power from the circuit board prior to replacing meter cable so that the
programmed settings are not lost.
TABLE 2
1 Time of Day 12:00 P.M.
2 Time of Regeneration 2:00 A.M.
4 Salt Dosage 10 lbs.
5 Backwash Time 10 min.
6 Brine Rinse 71 min.
8 Regeneration Interval 3 days or 870 gallons
10 Display Lock Out Disabled
AUXILIARY CONNECTIONS
Refer to Figure 1 for all circuit board connections. Power terminals are located along the lower section of the circuit
board. The connection marked 'MAIN' is for the main wire harness. The Soft-Minder connection is located in the
upper left side of the board. Next to the meter connection is a connection marked 'BATT', which is for the optional
battery back-up. All terminals are clearly marked to ease installation.
4 CULLIGAN MEDALLIST SERIES
FIG. 1
SOFT-MINDER® OPERATION
The Soft-Minder meter utilizes a turbine impeller to accurately monitor the customer's water usage. After a predetermined amount of water has passed through the system, the microprocessor will signal a regeneration. The "REG"
enunciator will light at this point. The unit will perform a standard regeneration cycle at the preset time, unless the
programming option "dip2" is changed from "DEL" to "Id". When programming option "dip2" is changed from
"DEL" to "Id", a regeneration will begin immediately.
The programming of the Soft-Minder provides several settable variables, the Time-of-Day, Time-of-Regeneration,
Salt Dosage, Backwash Time, Brine/Rinse Time, Gallons to Signal and Timeclock Backup, if active. Refer to the
programming section for further information on programming the microprocessor.
TIMECLOCK OPERATION
When the microprocessor is set-up as a time clock unit, the Culligan® Medallist control will regenerate at xed
intervals. The regeneration interval can be set anywhere from 1 to 42 days.
The programming for the time clock models is limited to Time-of-Day, Time-of-Regeneration, Salt Dosage, Backwash
Time, Brine/Rinse Time, and the Regeneration Interval. Refer to the programming section for further information on
programming the microprocessor.
REGENERATION
There are several conditions that will cause the control to trip a regeneration. The "REG" enunciator will light when
the control has signaled for a regeneration. The "REG" enunciator will ash while the control is in regeneration. The
following are conditions that will call for regeneration, assuming "dip2" has been set to "DEL":
1. When the Soft-Minder meter has recorded the passage of a predetermined number or gallons
2. When the time clock has counted past the set number of days.
3. At the preset time, when the number of days without a regeneration is equal to the Timeclock Backup setting.
4. At the preset time, after the "REG" button is depressed once. "REG" will light.
5. Immediately, when the "REG" button is depressed for three seconds. "REG" will light and blink.
6. Immediately, if power to the unit has been off for more than 3 hours and time of day has been returned.
FAMILIARIZATION 5
If "dip2" is set to "Id", the unit will begin a regeneration immediately for instances 1 and 2. With "dip2" set to "del",
the regeneration will not begin until the preset regeneration time.
Note: If set to immediate mode as timeclock or timeclock backup, the unit will initiate regeneration at 12:00 AM.
In the delay mode, "REG" indicator will light at 12:00 AM and regeneration will occur at delayed time.
DISPLAY LOCKOUT
The Culligan Medallist Series™ control is equipped with a feature which will allow you to protect the programmed
settings from tampering by unauthorized individuals. When the lockout feature is activated, the only parameters
which can be adjusted are the Time-of-Day and the Time of Regeneration. Refer to the "Setting of the
Microprocessor" for activating this feature.
POWER LOSS
The AccuSoft® circuit board is equipped with a Hi-Cap Capacitor and EEPROM memory chip. The capacitor is
capable of maintaining the time, for at least two days (masked chip), in the event of a power outage. The EEPROM
ensures that the individual programming parameters of the softener are not lost.
If the power outage lasts long enough to drain the Hi-Cap Capacitor, the control will ash "12:00 PM" when power
is returned to the control. The unit will continue to keep time from the moment power is restored, and will initiate a full regeneration at the preset regeneration time. The time of day will need to be reset in order to return the
regeneration to its preset time.
FAILURE MODE
There are certain conditions that can be interpreted by the circuit board as a failure of the drive motor or motor
position switch. Upon failure detection the control will cease further operation. A telephone hand set symbol will be
shown in the upper left corner of the display and the error code will be shown. Listed below are the different error
codes.
1. Motor Always Turning
Error code "E1" occurs when the circuit board detects changes in the motor program switch when the motor is
not supposed to be turning. The phone icon and "E1" will be lit in the display.
2. Motor Never Turns
The Culligan Medallist Series control is equipped to detect no change in the motor position when the motor is
supposed to be turning (motor or piston locked in a frozen position). The AccuSoft circuit board will apply
power to the motor for 20 seconds. If there is no change in the motor homing or position switch, the control will
power down for 1 minute. The circuit board will repeat this procedure two more times in an attempt to remove the
obstruction. If no movement has been detected, the control will permanently power down and a phone icon and
an "E2" will appear in the display.
3. Homing Error
Error code "E3" occurs when the circuit board detects when the control is unexpectedly in the home position.
The phone icon and "E3" will be lit in the display.
Error Display Cancellation
The error code display can be removed by removing the power to the control for 1 minute. After clearing an error
condition, the control will default to the factory settings when power is restored.
6 CULLIGAN MEDALLIST SERIES
Settings
The mircoprocessor can be set in two distinct operation modes, Soft-Minder® meter or Timeclock. As shipped from
the factory, the control is set for 8" Timeclock operation.
CAPACITY AND SALT SETTINGS
As mentioned previously, the softener will regenerate once the amount of water equal to the treated water
volume set point has passed through the turbine for meter models or after a xed time interval for timeclock
models. Regeneration is either delayed until the selected regeneration time or immediate depending on how the
microprocessor is programmed. Before completing the programming, the following information must be determined:
1. Compensated Water Hardness.
If your water supply contains iron, compensate for it by the following procedure:
1. Multiply the iron by 0.1 and add the result to the hardness.
Example: (3 ppm of iron x 0.1) + 25 gpg of hardness = 25.3 gpg of total hardness
2. Choose the % capacity you want and refer to the table below for the appropriate multiplier.
Example: 67% capacity gives a multiplier of 1.5.
TABLE 3
% Capacity 50% 67% 75%
Multiplier 2 1.5 1.33
3. Multiply the result from Step 1 by the multiplier chosen in Step 2. This is the compensated hardness.
Example: 25.3 gpg total hardness x 1.5 = 38 gpg compensated hardness.
4. Use the effective hardness for sizing and to determine salt dosage and regeneration frequency.
5. The forced regeneration feature should be used for Soft-Minder meter operation to ensure the resin bed
does not become iron fouled due to lack of water ow. See "Programming the Option Settings" for the
forced regeneration feature.
2. Salt Dosage
From Table 4, select the salt dosage at which the softener will be operated.
• Low Setting — Maximum salt efciency, more frequent regeneration, reduced overall softening capacity.
• Medium Setting — Good combination of efciency and overall softening capacity.
• High Setting — Maximum softening capacity, less frequent regeneration, and reduced salt efciency.
Recommended whenever iron is present and for hardness levels above 30 Grains Per Gallon, or high volume
water usage.
SETTINGS 7
TABLE 4 - SALT DOSAGE
Capacity 160 lb. Brine Tank 250 lb. Brine Tank 375 lb. Brine Tank
"A"Dimension "A"Dimension "A"Dimension
Salt Capacity Secondary (Only) Secondary Primary Secondary Primary
Dosage
8" ft3 30 ft3 45 ft3 in. (cm) in. (cm) in. (cm) in. (cm) in. (cm)
4 18,300 X X 7-3/4 19.7 6-5/8 16.8 4-5/8 11.7 5-1/2 14.0 3-1/2 8.9
5 20,000 20,000 20,000 9-1/2 24.1 8 20.3 6 15.2 6-1/2 16.5 4-1/2 11.4
6 22,000 22,500 23,500 11-1/4 28.6 9-3/8 23.8 7-3/8 18.7 7-1/2 19 5-1/2 14
7 23,200 24,400 26,500 13 33 10-7/8 27.6 8-7/8 22.5 8-1/2 21.6 6-1/2 16.5
8 24,100 25,700 29,000 14-3/4 37.5 12-1/4 31.1 10-1/4 26 9-1/2 24.1 7-1/2 19
9 25,100 27,000 31,300 16-1/2 42 13-5/8 34.6 11-5/8 29.5 10-1/2 26.7 8-1/2 21.6
10 26,100 28,300 33,300 18-1/4 46.3 15 38.1 13 33 11-1/2 29.2 9-1/2 24.1
11 26,800 29,400 35,000 20 51 16-3/8 41.6 14-3/8 36.5 12-1/2 31.7 10-1/2 26.7
12 27,500 30,500 36,500 21-3/4 55.2 17-3/4 45.1 15-3/4 40 13-1/2 34.3 11-1/2 29.2
13 X 31,500 38,400 21-1/2 59.7 19-1/8 48.6 17-1/8 43.5 14-1/2 36.8 12-1/2 31.7
14 X 32,500 39,200 25-1/4 64.1 20-1/2 52.1 18-1/2 47 15-1/2 39.4 13-1/2 34.3
15 X 33,300 40,400 — — 21-7/8 55.5 19-7/8 50.5 16-1/2 42 14-1/2 36.8
16 X 34,100 41,200 — — 23-1/4 59 21-1/4 54 17-1/2 44.5 15-1/2 39.4
17 X 35,000 41,800 — — 24-5/8 62.5 22-5/8 57.5 18-1/2 47 16-1/2 42
18 X X 42,400 — — 26 66 24 61 19-1/2 49.5 17-1/2 44.5
19 X X 42,900 — — 27-3/8 69.5 25-3/8 64.5 20-1/2 52.1 18-1/2 47
20 X X 43,500 — — 28-3/4 73 26-3/4 68 21-1/2 54.6 19-1/2 49.5
3. Treated Water Volume Set Point
Calculate the treated water volume set point using the following information:
• Softening capacity — Grains (based upon salt dosage setting).
• Compensated hardness of water supply — Grains Per Gallon
• Estimated daily water usage — Gallons Per Day (refer to Table 5)
TABLE 5 - Daily Water Usage
PersonsinHousehold GallonsPerDay
2 150
3 225
4 300
5 375
6 450
7 525
8 600
9 675
10 750
Example - Meter: Softener Model Medallist 2M
Capacity @ 9 lb. Salt Dosage: 25,100 Grains
Compensated Water Hardness: 19 Grains Per Gallon
Estimated Daily Water Usage: 300 Gallons Per Day
Treated Water Volume Set Point = — Water Usage
Softener Capacity
Compensated Hardness
Softening Capacity 25,100 Grains
Divide by Compensated Hardness ÷ 19 Grains per Gallon
Result is total number of gallons 1,321 Gallons
of soft water per regeneration
Subtract daily Water Usage (needed — 300 Daily Water Usage (One Day Supply)
as a reserve to ensure continuous 1,021 Gallons
soft water until regeneration occurs).
Round down to nearest ten for Treated
Water Volume Set Point 1,020 Gallon Setting
Set "CAPG" to 102
8 CULLIGAN MEDALLIST SERIES
™
Example - Timeclock: Softener Model Medallist 2
Capacity @ 9 lb. Salt Dosage: 25,100 Grains
Compensated Water Hardness: 19 Grains Per Gallon
Estimated Daily Water Usage: 300 Gallons Per Day
Treated Water Volume Set Point = — Water Usage
Softener Capacity
Compensated Hardness
Softening Capacity 25,100 Grains
Divide by Compensated Hardness ÷ 19 Grains per Gallon
Result is total number of gallons 1,321 Gallons
of soft water per regeneration
Subtract daily Water Usage (needed — 300 Daily Water Usage (One Day Supply)
as a reserve to ensure continuous 1,021 Gallons
soft water until regeneration occurs).
Divide by daily water usage ÷ 300
3.4 Days
Round down to nearest day 3.0 Days
Set "CAP" to 3
Use the following worksheets to calculate and record the proper settings.
TreatedWaterVolumeSetPointWorkSheet-MeterModels
1. Enter Softening Capacity
2. Divide by Compensation Hardness ÷
Result is Total Gallons of Soft Water Per Regeneration =
3. Subtract Daily Water Usage (Reserve —
Result =
Round down to nearest ten for Treated Water Volume Set Point Gallons
TreatedWaterVolumeSetPointWorkSheet-TimeclockModels
1. Enter Softening Capacity
2. Divide by Compensation Hardness ÷
Result is Total Gallons of Soft Water Per Regeneration =
3. Subtract Daily Water Usage (Reserve —
4. Divide by Daily Water Usage ÷
Result =
Round down to nearest ten for days between regeneration set point Days
Note: All Softening capacity is based on new Cullex® resin and using sodium chloride as the regenerate: If potassium chloride is used reduce the rated softening capacity by 20%.
SETTINGS 9
BRINE VALVE "A" DIMENSION
The brine valve contains a oat-actuated safety shut-off device to prevent overow of the brine tank in the unlikely
case of an electrical or mechanical failure during the brine tank rell cycle.
It is recommended that the brine valve oat be used as intended, that is, as a secondary, safety shut off. Remember,
the timer mechanism provides the primary rell shut-off. To use the oat as a safety shut-off, refer to Table 4 for
the salt dosage and brine tank size being used. The "A" dimension is the distance between the lter screen and the
bottom of the oat (Figure 2) when the oat stem is in its fully raised position; adjust the oat and rubber grommets
accordingly.
FIG. 2
10 CULLIGAN MEDALLIST SERIES
™
Programming
Make sure the inlet water supply is turned off, then supply power to the timer. The display will power up ashing
"12:00 PM" and the motor will energize and cycle the control, without stopping, to the home position. This is
required to ensure that the control is in the home position.
The timer uses four buttons:
FIG.3-CircuitBoardDisplay
1. STATUS: Advance timer through display options.
2. PLUS SIGN "+": Increase the setting.
3. MINUS SIGN "-": Decrease the setting.
4. REGEN.: Initiate a manual regeneration.
PROGRAMMING THE OPTION SETTINGS
The microprocessor has several programming options that can be changed for various additional functions. Listed
are the functions for the programming options used on the Culligan Medallist Series™ control.
Dip Switch Function Default Position
1 Service or Test Service
2 Delay or Immediate Regeneration Delayed Regeneration
3 Softener or Filter Softener
4 Time Clock Backup OFF
5 English or Metric English
6 12 or 24 Hour Clock 12 Hour
7 3/4" or 1" Meter 3/4" Meter
1 Service or Test Mode
P r e s s a n d h o l d t h e “ S T A T U S ” k e y u n t i l “ d I P 1 ” a p p e a r s i n t h e
display. “dIP1” will blink for 3 seconds and then the display will
show the status of this option (SEr or tES). Toggle the feature
with the “+” or “-” key.
Note: Pressing “STATUS” after changing option to test mode
will place the control in test mode. After testing is complete
press and hold “STATUS” for 3 seconds to return to “dIP1”
setting. Placing the unit in test mode will not change any of the
programmed values.
2 Delay or Immediate Regeneration
Press the “STATUS” key. The display will blink “dIP2” for 3
seconds and then show the current status. Toggle between
“DEL” (Delay) and “Id” (Immediate) with the “+” or “-” key.
Note: Changing this setting will not change any of the
programmed value with the exception that Step #2, time of
regeneration will be ignored when set to immediate.
del
3 Softener or Filter
Press the “STATUS” key. The display will blink “dIP3” for 3
seconds and then show the current status. Toggle between
“SOF” (Softener) and “FIL” (Filter) with the “+” or “-” key.
Note: Changing this setting will cause the unit to load the
Filter or Softener defaults.
4 Timeclock Backup
Press the “STATUS” key. The display will blink “dIP4” for 3
sof
PROGRAMMING 11
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