Aprilaire Freezer Freezer PLUS Series User Manual

MFP & MCFP UNITS  
Enzyme/Manual Defrost Freezer PLUS Series  
OWNER’S INSTRUCTIONS  
How to operate and care for your appliance and how to get the best, as well as the  
lowest cost, performance.  
READ THIS BOOK!  
Note to Customer:  
This merchandise was carefully packed and thoroughly inspected before leaving our plant. Responsibility  
for its safe delivery was assumed by the carrier, upon acceptance of the shipment. As directed on the  
side of your packing carton, claims for loss or damage sustained in transit must be made on the carrier as  
follows:  
A.) Exterior Damage: Make thorough damage notation on your delivery receipt and have driver  
acknowledge by signature and date. Send a written request asking for an inspection report from  
carrier. Include the name of carrier representative and the date the inspection was requested. Retain  
inspection report and receipt for filing of a claim.  
B.) Concealed Damage: This must be reported to carrier within fifteen days. Obtain inspection report  
from the carrier. Retain the inspection report for filing of the claim. DO NOT RETURN DAMAGED  
MERCHANDISE TO MANUFACTURER - - FILE THE CLAIM WITH THE CARRIER.  
Lab Research Products  
125 Varnfield Drive  
Summerville, SC 29483  
Phone: 800-648-4041  
Warranty:  
Three-Year Parts and Labor  
5 Years Compressor Parts  
Revision Date  
03/12/04  
Fax:  
843-821-8051  
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Expand Contents

SPECIFICATIONS:  
Enzyme/Manual Defrost Freezer PLUS Series  
Inner  
Usable Int. Dim. Ext. Dim.  
Ship  
Model  
Cu.Ft. Doors  
Doors/Drawers  
Shelves  
W" D" H" W" D" H" H.P Amps BTU/hr Ibs Ibs  
MFP-0920  
MFP-2020  
MFP-2030  
MFP-2920  
MCFP-1520  
MCFP-2020  
9
1 swing  
1 swing  
1 swing  
1 swing  
1 swing  
1 swing  
5/2  
5/0  
5/0  
5/0  
N/A  
N/A  
6 fixed  
4 fixed  
16  
27  
27  
32  
42  
56  
16 50 22 24 64* 1/6  
18 57 32 29 77* 1/4  
18 57 32 29 77* 1/4  
26 65 35 32 84* 1/3  
24 28 48 30 35* 1/4  
24 28 62 30 35* 1/4  
7
5
5
5
5
5
850  
770  
770  
2174  
770  
770  
136 176  
315 355  
315 355  
328 368  
191 231  
220 265  
20  
20  
29  
15  
20  
4 fixed  
4 fixed  
2 baskets  
2 baskets  
RECEIVING  
A. LRP ships by carriers that we have used for many years and have selected for their good service,  
but accidents in shipping occur regardless of how much care is taken. Therefore the following is  
very important:  
B. Inspect unit at once for any shipping damage, including concealed damage.  
C. You should check for any shipping damage immediately, preferably before the carrier leaves  
your receiving dock, as nearly all shipments are FOB ship point.  
D. If there is any damage, note it on the carrier's receiving documents and notify the office of the  
carrier immediately.  
E. The responsibility of the shipper and the delivering carrier ends five days after goods are received.  
It becomes the responsibility of YOU, the customer, to unpack the unit and check for concealed  
damage caused during shipping. Immediate attention should be given to this.  
F. Retain all packing materials if damage is found.  
INSTALLATION AND STARTING INSTRUCTIONS  
LOCATION – This unit requires a minimum of 4 inches of air flow in back and 1 to 2 inches on the sides  
and top. Leveling legs are required in front only. Unit may have a slight tilt from front to back after  
legs are installed. This is acceptable and is recommended on this unit.  
POWER SOURCE – The supply circuit to this cabinet must conform to all National and Local Electrical  
Codes. Consult the cabinet Serial-Data plate for voltage, cycle, phase, and ampere requirements  
before making connection. VOLTAGE SHOULD NOT VARY MORE THAN 5% FROM SERIAL  
PLATE RATINGS. A separate circuit is recommended to prevent possible loss of product due to  
over-loading or failure of other equipment on the same circuit. PROTECT THE CIRCUIT WITH A 20  
AMP DELAY-TYPE FUSE.  
STARTING – There are no compressor shipping bolts to loosen or valves to open. All that is necessary  
after the freezer has been properly leveled is to plug the service cord into an electrical outlet. Do not  
use an extension cord. Be sure your freezer is properly grounded. Use the 3-prong plug provided  
into a 3-prong grounded outlet. (Only this method complies with national electrical codes, local  
codes and ordinances.) Unless the above grounding method is followed, you are not protected  
against severe or lethal shock in the event of a short circuit of an electrical component or wiring of the  
freezer. When starting this new appliance, allow the cabinet to operate a minimum of three hours or  
until it has started cycling normally before placing product in the cabinet. The motor compressor may  
start and stop several times when the unit is first started or after defrosting, especially if the weather  
is very hot. This is only normal functioning of the motor overload protector. The motor compressor  
will cycle normally as soon as the excess heat has been removed.  
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OPERATING INSTRUCTIONS  
A. DEFROSTING-This is a manual defrost system. If ice build up is present ¼ inch or more on the  
fixed shelves, defrosting is recommended. Large ice build-up will reduce cooling efficiency.  
B. CLEANING  
1. Cabinet Exterior – Wash with a mild soap and water solution. Rinse with clear water and dry.  
2. Cabinet Interior – Wash with 2 tbls. of baking soda and 1 qt. warm water solution or mild soap.  
DO NOT USE STRONG CLEANERS, SCOURING POWDER OR PADS.  
COMPRESSOR – CONDENSER  
A. The compressor is hermetically sealed and will require no attention. The condenser is located  
between the inside and outside walls of the freezer and also requires no attention. Its natural heat  
keeps the exterior free of moisture; because of this, the outside may feel warm to the touch. This  
condition entirely normal.  
SERVICE  
A. In the event this freezer does not operate properly, check the following before calling the service  
man:  
1. Is there adequate air circulation around the unit and in the room?  
2. Is electrical power reaching the unit? (Check for blown fuse.)  
3. Is service cord connected to outlet?  
4. Is door closed tightly?  
If this does not correct the difficulty, contact a competent service man.  
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Operation Manual  
for  
LR5 TempGuard  
Refrigeration Control  
3
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Safety:  
This product operates at 120 VAC or 220 VAC power. Please unplug the power  
cord from the wall socket before performing any work on any of the electrical  
components of this system. Performing work while the unit is plugged in could result  
in a severe electrical shock.  
Introduction:  
The LR-5 TempGuard control system was designed to provide many years of  
reliable service. This control utilizes micro-controller technology to continuously  
monitor the temperature in the refrigerator/freezer and to maintain the temperature  
within the limits set by the user. The control settings are easily adjusted through the  
LR5 TempGuard front panel and the control “remembers” the coldest and the  
warmest temperatures achieved in operation.  
Hardware Requirements:  
LR5:  
LR5 TempGuard temperature control  
LR3-S: The laser trimmed sensor for the LR5 TempGuard  
Setting up the LR5 TempGuard Control:  
Setting the high temperature and low temperature of the control range.  
1. Press the HIGH TEMP button and the corresponding LED will start flashing  
2. Use the and the buttons to change the temperature.  
3. Press the HIGH TEMP button again to lock in the desired temperature. The  
LED will stop flashing.  
4. Follow the same steps for the low temperature using the LOW TEMP button.  
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Set the high temperature alarm and the low temperature alarm.  
1. Press the High Alarm button and the corresponding LED will start flashing  
2. Use the and the buttons to change the alarm temperature.  
3. Press the High Alarm button again to lock in the desired alarm. The LED will  
stop flashing.  
4. Follow the same steps for the low temperature alarm using the Low Alarm  
button.  
Pressing and holding the and the buttons cause a rapid increase or decrease in  
the value on the display. This can be used for large changes in the temperature  
settings. Also, after the High Temp, the Low Temp, the High Alarm, or the Low  
Alarm button is pressed, the user has 15 seconds to press the or the buttons. If  
no activity is detected, the control reverts to its main control activity while leaving the  
settings unchanged.  
How the LR5 Control works:  
The LR5 TempGuard control continuously monitors the temperature of the  
refrigerator/freezer through its sensor assembly. When the temperature warms to  
the point where it reaches the upper temperature limit, the LR5 sends a signal to  
turn on the compressor, which cools the unit. The compressor is kept running until  
the temperature reaches the cold setting. When this lower temperature set point is  
reached the LR5 turns off the compressor. The refrigerator/freezer warms over time  
and the process continues.  
The LR5 TempGuard records the warmest and the coldest temperatures seen by the  
control. To access these temperatures, press the button for the warmest  
temperature or press the button for the coldest temperature. To clear out the  
warmest and coldest temperature, press both and buttons at the same time and  
hold them until the display blinks (approximately 5 seconds). The warmest and  
coldest temperatures are reset to equal the High Temp and the Low Temp settings.  
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The new LR-5 includes the following features:  
Red LED for visual indication of an error condition  
Beeper for audible indication of an error condition  
Battery for indication of error even when the control has lost power  
Door open indication and door open too long alarm  
Remote Alarm Dry Contacts  
The LR5 TempGuard provides a flashing red LED and an audible tone for alarm  
situations. The alarms are run off a NiMH battery so that an alert occurs regardless  
of whether or not the control has power.  
The feature package can be  
enabled/disabled with a switch installed on the main circuit board. Moving the switch  
to the ON position activates these features and moving it to the OFF position  
deactivates these features.  
The LR-5 TempGuard provides an indication if a door is opened by sounding a  
single beep. If the door stays open for 10 minutes then the LR5 indicates that an  
error condition has occurred by activating the red LED and the beeper.  
Control Limits:  
The High Temp and Low Temp can be adjusted within the entire range as desired.  
The range varies depending on the model of refrigerator or freezer that was  
purchased. The High Temp cannot be lower than the Low Temp.  
If the High Temp is being lowered and it runs into the Low Temp it will push the Low  
Temp lower. The Low Temp will always be at least 4 degrees C less than the High  
Temp.  
If the Low Temp is being raised and it runs into the High Temp it will push the High  
Temp higher. The High Temp will always be at least 4 degrees C higher than the  
Low Temp.  
The High Alarm can be adjusted in the range from the (High Temp + 2) to the upper  
limit.  
The Low Alarm can be adjusted in the range from the (Low Temp – 2) to the lower  
limit.  
If the High Temp is being raised and it runs into the High Alarm, the High Alarm will  
automatically be adjusted upward. The High Alarm is always at least 2 degrees  
higher than the High Temp.  
If the Low Temp is being lowered and it runs into the Low Alarm, the Low Alarm will  
automatically be adjusted downward. The Low Alarm is always at least 2 degrees  
lower than the Low Temp.  
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If the High Alarm is being lowered and it runs into the High Temp, it will go no lower  
than the (High Temp + 2).  
If the Low Alarm is being raised and it runs into the Low Temp, it will go no higher  
than the (Low Temp – 2).  
Control Status and Error Conditions:  
When the control is operating normally, the temperature detected by the sensor  
assembly is displayed on the control panel. If the temperature gets too warm and  
reaches the High Alarm setting, the display will flash alternatively between the actual  
temperature and the message Hi. If the temperature gets too cold and reaches the  
Low Alarm setting, the display will flash alternatively between the actual temperature  
and the message Lo. If the sensor assembly is disconnected or gets damaged the  
display will read Er.  
Temperature Zones & Validation:  
Each refrigerator or freezer will display its own characteristics in regard to the  
temperature gradient throughout the inner chamber.  
The uniformity of the  
temperature throughout the inner chamber can be influenced by many factors such  
as location of the sensor, air flow patterns, mass of the sensor, location of shelves,  
location of the product stored, quantity of the product stored, mass of the product  
stored, number of doors, insulation and frequency of door openings/closings. Some  
temperature variation in the refrigerator or freezer should be expected and is a  
normal occurrence. The LR5 TempGuard control monitors and controls the  
temperature at the location of its sensor assembly. At the location of the sensor the  
temperature will be accurate to within 1 degree C.  
Validation can be performed on the LR5 TempGuard control by testing at a known  
temperature. Ice water has a known temperature of 0o C. To validate the control,  
dip the sensor assembly into a bath of ice water made from distilled water. After  
letting the temperature settle, the LR5 TempGuard will display a temperature of 0  
degrees +/- 1 degree. This test validates the temperature accuracy of the sensor  
assembly.  
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Wiring the LR5 TempGuard:  
The LR5 Tempguard is supplied with a green 7-contact plug to make wiring easy. A  
plug legend is attached to the back plate of the control. It is summarized below:  
Pin 1  
Pin 2  
Pin 3  
Pin 4  
Pin 5  
Pin 6  
Pin 7  
AC Line (polarity does not matter)  
AC Line (polarity does not matter)  
Door Alarm (polarity does not matter)  
Door Alarm (polarity does not matter)  
Remote alarm (normally open contact)  
Remote alarm (common)  
Remote alarm (normally closed contact)  
AC Line - Power wired into AC line of the system.  
Door alarm - The door alarm circuit on the LR5 detects an open or closed circuit.  
An open circuit indicates that a door has been opened while a closed circuit  
indicates that all doors are closed. The circuit should be wired in series through  
switches attached at each door.  
Remote Alarm - A relay is provided on the LR5 to signal an error condition.  
Continuity exists between pins 6 & 7 in a normal condition. An error condition  
provides continuity between pins 5 & 6.  
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