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contact with any electrical component either inside or outside the ice-box. If the sensing 
tube needs to be bent within the confines of the refrigerator or freezer box, it must be 
done with great care, heeding the warnings above.

 

C: Operation: 

The thermostat knob is marked from 1 to 7. The coldest setting is 7, & from this position 
the knob can be rotated counter-clockwise to setting 1, which is the warmest. If the knob 
is rotated further counter-clockwise, beyond setting 1, some initial resistance is felt & 
then the thermostat will click into the OFF position. On initial system start-up, it is 
recommended that you set the thermostat to number 4 & let the system run through a few 
cycles while monitoring box temperature before any adjustments are made. 

 

TEMPERATURE RANGES FOR EACH MODEL THERMOSTAT 

MODEL 

WARM IN/OUT 

MIDDLE IN/OUT 

COLD IN/OUT 

FRIDGE 

ONLY 

51.7/40.9 44.5/32 36.4/23.9 

FREEZE ONLY 

28.4/12.2 

22.1/5 

14/-4.8 

COMBO 

UNIT 

38.2/26.6 32/19.4 23.9/10.4 

 
 

Temperatures above are in Fahrenheit and are a range from warmest to coldest.  The “in” 
temperature is when the unit will turn on during that setting.  The “out” is the temperature 
when the unit will turn off during that setting.  The temperature is measured by the silver 
capillary sensing tube on the thermostat.  Each thermostat is stamped with the model 
number indicating the thermostat range.  See below: 
 

077B0028 = Refrigerator Only 

077B0021 = Freezer Only 

077B0028 = Combination Unit 

 

 

SECTION 7 

(QUICK CONNECT REFRIGERANT CONNECTIONS) 

 

A: Note: 

Each component of the Mermaid condensing system is fitted with one male & one female 
Quick Connect fitting that connects with a corresponding fitting on other components of 
the system. The individual items (condenser and evaporator) are charged with the correct 
amount of refrigerant at the factory, & when the Quick Connect fittings are joined 

Содержание KOOL-TEMP

Страница 1: ...RATION FREEZER UNITS INSTALLATION INSTRUCTIONS AND OWNER S MANUAL PRODUCED BY MERMAID MANUFACTURING OF S W FL INC 2651 PARK WINDSOR DRIVE SUITE 203 FORT MYERS FL 33901 800 330 3553 239 418 0535 P 239 418 0538 F INFO MMAIR COM ...

Страница 2: ...er SECTION 4 SAFEGUARDS A Low Voltage B High Voltage C Compressor Non Start D Compressor Speed Too Low E Fan Protection F Module Overheat G Alarm Indicators SECTION 5 EVAPORATORS A Location B Installation C Thermostat Sensing Tube D Mounting SECTION 6 THERMOSTATS A Refrigerator Freezer Thermostats B Mounting C Operation SECTION 7 QUICK CONNECT REFRIGERANT CONNECTIONS A Note B Connection The Quick ...

Страница 3: ...ht brokers boat dealers and marinas around the world with their marine air conditioning refrigeration and dehumidification needs Mermaid refrigeration freezer systems are manufactured to the highest of quality standards using only top of the line components and materials assembled by long term technicians All of our refrigeration freezer units are modularized self contained pre wired pre charged a...

Страница 4: ...ely drawn back in The efficiency of the system depends mainly on the temperature of the air entering the condenser Re circulating the heated air back into the condenser in a sealed or poorly ventilated cabinet will result in poor system performance as will drawing in air from a heated space i e engine room B Installation These units are designed to be mounted on a surface where adequate ventilatio...

Страница 5: ... this be your model the unit will automatically detect either 110v or 12 24v The unit will run on the stronger of the two power sources Should 12 24v be available and 110v is introduced via shore power or generator the unit with automatically switch to this power source If 110v is lost the unit will wait 60 seconds before automatically switching back to 12 or 24 volts dc SECTION 4 SAFEGUARDS Prote...

Страница 6: ...erature the compressor will be stopped will be re started when normal operating temperatures are resumed G 4 Alarm Indicator A LED may be installed across the D terminals of the Module to indicate a failure condition as follows LCD will Blink up to 5 times every 5 seconds 1 Blink Supply voltage low below 10 4v 22 8 2 Blinks Excessive load on fan terminals above 1 0 amps 3 Blinks Compressor non sta...

Страница 7: ...f present Mounting the evaporator on the bottom of the compartment will result in damage and inadequate cooling of the compartment B Installation All evaporators have approx 6 of copper tubing attached with dust plugs in the end fittings that must remain installed until the connections are ready to be made A 1 1 2 hole needs be drilled in the wall of the ice box as high as possible through success...

Страница 8: ...frigerator freezer leaving the capillary tubing coiled up next to the body of the thermostat IS acceptable Simply ensure the capillary tubing body included or not is in an area where the inside temperature created by the white evaporator plate can be felt D Mounting The evaporator has numerous mounting holes along the top bottom edges Do not drill or attempt to drill holes in any evaporator for an...

Страница 9: ...T MIDDLE IN OUT COLD IN OUT FRIDGE ONLY 51 7 40 9 44 5 32 36 4 23 9 FREEZE ONLY 28 4 12 2 22 1 5 14 4 8 COMBO UNIT 38 2 26 6 32 19 4 23 9 10 4 Temperatures above are in Fahrenheit and are a range from warmest to coldest The in temperature is when the unit will turn on during that setting The out is the temperature when the unit will turn off during that setting The temperature is measured by the s...

Страница 10: ...e force as the seal that stops the refrigerant from escaping is made with an o ring does not depend on the fitting being wrenched down hard If there is a continuous hiss after the connection has been completed disconnect the fitting check that the o ring has not been damaged SECTION 8 ELECTRICAL A Power Supply The power supply to the Electronic Control Module must given particular attention to pre...

Страница 11: ...to Change Over units have clearly marked 110v and N DO NOT incorrectly put the 12 24VDC lines to here It will not cause permanent damage however the unit will not operate Follow the wiring schematic carefully SEE LAST PAGE OF MANUAL FOR WIRING SCHEMATIC E Connections Thermostat Connect the two slip on connectors from the thermostat to the corresponding terminals on the Electronic Module color pola...

Страница 12: ...tat wires jumper the terminals that they were on together temporarily If the system then runs make the connection permanent control the system manually from the breaker on your supply panel Replace thermostat as soon as possible 5 Thermostat wired incorrectly or faulty connections Refer to the installation instructions confirm that connections are as they should be Ensure that the thermostat conne...

Страница 13: ...e Module during start attempts to ensure that it does not fall below threshold levels If it does check power supply ground connections components for integrity Check for correct wire sizing Charge batteries if necessary 2 Faulty fan or pump relay or unauthorized component installed Remove connectors from F terminals on Module attempt re start Maximum current draw on these terminals is limited to 0...

Страница 14: ... at the breaker panel or by turning thermostat to the off position Restore power or reset thermostat when evaporator is free of frost Never use any implement in an attempt to loosen the frost on the aluminum evaporator A light frost is acceptable 6 Incorrect refrigerant charge If after the compressor has been running for an appreciable length of time the evaporator surface does not have an even co...

Страница 15: ...ing plate evaporator that is over sized for the application it will absorb more heat than that which enters the box through the insulation so lowers the temperature Experiment by covering some of the plate surface with insulating material until you achieve correct box temperatures This method will also increase hold over times 5 Poor spillover system construction If you are running the evaporator ...

Страница 16: ...l fan is used to circulate air in the box make sure that the cold air is not being blown towards out of a door lid seal This could force cold air out of the box set up a circulation pattern if the seals are leaking 2 Poor or damaged door lid seals Check seals replace if necessary A good seal will grip a 1 bill when inserted in the seal the door lid is then closed A front opening door top opening l...

Страница 17: ...DANFOSS COMPRESSORS 12 24V AND 12 24V W 110V ...

Страница 18: ... THIN RED WIRE FAN F NEGATIVE LEAD THIN BLACK WIRE FAN D FAULT LIGHT BROWN WIRE C THERMOSTAT GREEN WIRE P OPEN TERMINAL NO WIRE T THERMOSTAT PURPLE WIRE MM1 AND MM2 12 24V 110V WITH AUTO CHANGE OVER MODELS L 110V LIVE WIRE BLACK WIRE N 110V NEUTRAL WIRE WHITE WIRE NEGATIVE LEAD BLACK WIRE NEGATIVE 12 24V POSITIVE LEAD THIN RED 12V RED WIRE FAN INCOMING 12 24V POWER F NEGATIVE LEAD THIN BLACK WIRE ...

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