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Water and Refrigeration Schematics

MAR1400 & MAR2000

December 2000

Page 20

1. Water drawing area
2. Water sprayed onto freezing cooling area
3. Sub-cooling area
4. Float valve
5. Water line
6. Scraping blade
7. Water pump
8. Water basin
9. Revolving drum
10. Water distributing tube

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Содержание MAR1400

Страница 1: ...trol Devices 8 Location Consideration 9 Installation Diagrams 10 Water Circuit 11 Installation 12 Bin Thermostat 13 Component Assembly 14 Electrical Connection 15 Multiple Installations 16 Testing 17...

Страница 2: ...purchaser as per the instructions given in this service manual Take time now and read this manual which contains valuable information on the MAR Split System For any further questions regarding the ca...

Страница 3: ...ine sizes may need to be larger depending upon length of run MAR1400 MAR2000 December 2000 Page 3 A B C 1Water Inlet Fitting 2 Liquid Line 3 Suction Line 4 Drain MAR1400 OR MAR2000 876 mm 34 49 621 mm...

Страница 4: ...11 PSIG MAX WATER TEMPERATURE 35 C 95o F MIN WATER TEMPERATURE 5 C 41o F MIN WATER PRESSURE 1 atm 15 PSI MAX WATER PRESSURE 5 atm 75 PSI MIN AMBIENT TEMPERATURE 5 C 41o F MAX AMBIENT TEMPERATURE 40 C...

Страница 5: ...MAX WATER TEMPERATURE 35 C 95o F MIN WATER TEMPERATURE 5 C 41o F MIN WATER PRESSURE 1 atm 15 PSI MAX WATER PRESSURE 5 atm 75 PSI MIN AMBIENT TEMPERATURE 5 C 41o F MAX AMBIENT TEMPERATURE 40 C 104o F...

Страница 6: ...e ice Scale ice is a dryer and colder form of the familiar flake ice The MAR split unit is a remote low side system A remote low side allows more flexibility in placement of the ice machine section So...

Страница 7: ...ater cooled MAR2000 Use MAR2000 RHS A C air cooled or MAR2000 RHS W C water cooled Condensing Unit Component Guidelines The condenser is basically a heat exchanger where the heat absorbed by the refri...

Страница 8: ...rongly recommended for a condensing unit Set to values shown on tech spec Lo Pressure Control Recommended for a condensing unit Very important because in case of refrigerant leaks at the evaporator it...

Страница 9: ...able below show the recommended sizes of refrigerant lines Note The tubing connections at the MAR unit are 3 8 liquid and 5 8 suction Insulate any lines that will be exposed to temperatures that will...

Страница 10: ...Installation Diagrams MAR1400 MAR2000 December 2000 Page 10...

Страница 11: ...end use application this can be refrigerated or non refrigerated Also a weight volume ratio of 2 1 cubic meters per 1000 Kg of ice 30 lb per cubic foot must be taken into consideration for correct ic...

Страница 12: ...n top of ice storage bins on the side of cold storage room supported by special pre set stands or in case of fishing vessel installation inside or on top of the fish hold Note See sales information fo...

Страница 13: ...t is above the control box not in chute or machine compartment ICE CHUTE The ice chute is packed separately and must be connected to the ice machine after it has been positioned on the ice storage bin...

Страница 14: ...perfect radius as possible The liquid line is not critical regarding its slope and position but the suction line must be installed so the tubing will drain toward the compressor After all lines are c...

Страница 15: ...e the connected load individually fused see specifications and provided with ground line The maximum allowable voltage variation must not exceed ten percent of the nameplate rating even under starting...

Страница 16: ...n line of the coldest evaporator to prevent warmer higher pressure low side vapor from moving into the colder evaporator during the off periods The MAR liquid line connection must NOT be connected dow...

Страница 17: ...e system from the rack A high vacuum gauge capable of registering pressure in microns should be attached to the system Evacuate the system to 300 microns CHARGING DEDICATED SYSTEM When a dedicated con...

Страница 18: ...fore adding refrigerant 8 Observe oil level in compressor crankcase sight glass and add oil as necessary to bring level to center of the sight glass 9 Let the system operate for at least two hours the...

Страница 19: ...the cylinder drum is constantly submerged in water This allows the cylinder metal jacket to draw a film of water that as soon as it comes out of the water freezes almost instantly due to the heat abso...

Страница 20: ...MAR1400 MAR2000 December 2000 Page 20 1 Water drawing area 2 Water sprayed onto freezing cooling area 3 Sub cooling area 4 Float valve 5 Water line 6 Scraping blade 7 Water pump 8 Water basin 9 Revolv...

Страница 21: ...December 2000 Page 21 1 Liquid Line 2 Heat exchanger 3 Automatic expansion valve 4 Suction line 5 Water inlet 6 Float valve 7 Water basin 8 Evaporator drum 9 Scraping blade 10 Water pump 11 Spray bar...

Страница 22: ...em is running independently of the amount of refrigerant in the system This valve has a manual adjustment to give the evaporator coil the desired pressure of refrigerant Turning the adjustment to the...

Страница 23: ...Both the MAR1400 and the MAR2000 are equipped with a gear reducer having a ratio of 1 570 The gear reducers are greased for life therefore they do not require any maintenance O Water pump spay bar Us...

Страница 24: ...rate of refrigerant flow Turning the adjustment to the right clockwise the refrigerant flow to the evaporator is reduced Use the stem cap of the AXV for manual adjusting operations Set the EPR first...

Страница 25: ...ne valves Recover any refrigerant from the MAR unit After that the flare fitting at the inlet of refrigerant manifold can be disconnected as shown 2 Remove the 4 allen screws connecting the refrigeran...

Страница 26: ...ecessary to stroke on it a very fine sand paper stripe Check to see that washer be properly clean and positioned with keyway to match the key 10 If necessary replace the 0 rings of the S S ring that h...

Страница 27: ...l mechanism S S ring and spring then the seal mechanism ring 17 Fit the screw of 4 MA with its nut in one of the three threaded holes then screw down the nut in order to compress the spring 18 When th...

Страница 28: ...ch keeps in place the seal ring inside the refrigerant manifold and fit inside the manifold the gasket 22 Position the manifold on the six mounting studs fit the six mounting nuts and washers and tigh...

Страница 29: ...w securing pulley on gear box input shaft 3 Remove four nuts and washers which secure the gear box to the evaporator basin side frame 4 Gently tap on the gearbox with a mallet to loosen it from its mo...

Страница 30: ...ording to model technical specification 7 Check gauge for Suction Line Pressure which varies depending upon models inlet water temperature and ambient temperature 8 Check drive motor operation Normal...

Страница 31: ...12 Open a little bit the float valve holding arms and remove it from the holder 13 Remove screws and clip ring securing float valve bracket to the nozzle 14 Withdraw bracket from float valve nozzle 1...

Страница 32: ...arge of oil in system Check moisture indicator and remove charge and drier Replace recharge the system Not enough refrigerant Check for refrigerant leak Lo water level Intermittent water supply or too...

Страница 33: ...g against rotating drum Remove blade and melt up ice formation Lower water level to correct value Making wet ice Surrounding air temperature above 40EC 100EF Correct or move unit to cooled location Un...

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