background image

14

SYSTEM EVACUATION

Following the pressure testing for leaks, the system must be evacuated.

Use a vacuum pump (not a compressor) to draw a vacuum of 200 microns or less from 
both sides of the system. Do not attempt to draw a vacuum on the system with the pump 
connected only on the low side. The high side of the system should be interconnected with 
the  low  side  by  using  a  minimum  3/8”  OD  copper  tube.  Use  an  electronic  gauge  to 
measure the vacuum because a refrigeration gauge cannot provide an accurate reading 
at this resolution.

Break the vacuum with dry nitrogen. These procedures should be performed at ambient 
temperature above 18.33°C.

Note:

  Never  use  a  compressor  to  evacuate  a  system.  Instead,  use  a  high-pressure 

vacuum pump specifically designed for that purpose. Never start the compressor while it is 
under  a  deep  vacuum.  Always  break  the  vacuum  with  a  refrigerant  charge  before 
energizing the compressor. Failure to follow these instructions can damage the hermetic 
terminal. As always, to avoid serious injury or death from terminal venting with ignition, 
never energize the compressor unless the terminal cover is securely fastened.

WARRANTY

Warranty will be voided if compressor 

Follow the evacuation procedure very carefully. 

fails as a result of moisture related problems.

SYSTEM CHARGING

Failure  to  properly  charge  the  system  can  result  in  serious  injury  or  death  from 
explosion or fire. Follow these precautions when charging a system:

Do not operate the compressor without charge in the system.

Operating the compressor without a charge in the system can damage the hermetic 
terminal. To  avoid  serious  injury  or  death  from  terminal  venting  with  ignition,  never 
energize the compressor unless the protective terminal cover is securely fastened.

Use  only  the  serial  label  refrigerant  when  charging  the  system.  Using  a  different 
refrigerant can lead to excess system pressure and an explosion. Use of a refrigerant 
other than the serial label refrigerant will void the compressor warranty.

Do not overcharge a refrigeration or air conditioning system.

Overcharging a refrigeration or air conditioning system can result in explosion. To avoid
serious  injury  or  death,  never  overcharge  the  system. Always  use  proper  charging 
techniques.

Limit charge amounts to those specified on the system equipment serial label or in the
original equipment manufacturer’s service information.

Overcharging the system immerses the compressor motor, piston, connecting rods, 
and  cylinders  in  liquid  refrigerant.  This  creates  a  hydraulic  block  preventing  the 
compressor from starting. The hydraulic block is also known as locked rotor.

WARRANTY

Use of a refrigerant other than those listed on the serial label will void the compressor 
warranty.

Содержание CD454532EGH-S

Страница 1: ...Outdoor Condensing Units www Tecumseh com INSTALLATION INSTRUCTION MANUAL...

Страница 2: ...E TESTING FOR LEAKS 12 13 SYSTEM EVACUATION AND SYSTEM CHARGING 14 15 APPROVED HERMETIC COMPRESSOR OILS SYSTEM START UP PROCEDURE 15 16 OPERATIONAL CHECKOUT PROCEDURE MAINTENANCE ODCU AND TROUBLE SHOO...

Страница 3: ...H S XX XX E 38 5 4 3 ODCU NOMENCLATURE ODCU EXPLODED VIEW ODCU PARTS LIST CONDENSER COIL RIGHT PANEL ELECL COVER LIFT HANDLE FRONT PANEL FAN GRILL FAN MOTER WITH BLADER RECEIVER COMPRESSOR FILTER DRIE...

Страница 4: ...2 53 1 670 607 300 520 1 2 53 1 1 670 607 300 520 5 8 53 670 607 300 520 5 8 53 A B C D DIMENSIONS ARE IN MM DIMENSIONS MINIMUM WALL CLEARANCES SUGGESTED FOR INSTALLATION UNIT MODEL CDUS4524EGE S CDU4...

Страница 5: ...538EGF S CDU4542EXG FB CDU4542EXG S LIQUID LINE FLARE NUT TYPE UPTO VERTICAL MOUNTING PITCH E DIAGRAM 2 2 975 810 400 675 395 5 8 3 8 68 2 975 810 400 675 395 5 8 3 8 75 2 975 810 400 675 395 5 8 3 8...

Страница 6: ...the units in such a way that the airflow direction through the unit faces to prevailing wind direction for the area The units should be mounted securely on adequate rigid and leveled bases to avoid i...

Страница 7: ...MOUNTING Make a concrete platform to the mounting dimension of M8 anchor bolt 4 Nos with M8 Plain washers Base surface should be leveled properly for mounting pitch dimensions refer drawing No 1 2 on...

Страница 8: ...18 8 0 65 2 6 900x360x805 1059x500x875 68 CDU Model Compressor Model Power Supply Cooling Capacity btu hr Nominal Current a Power Input w Max Refrigerant Chargable HP Pr Switch Cut In cut Out Bar LP...

Страница 9: ...ontrol all these units as per the application requirement That is solenoid valve for the liquid line Applicable for fully built models only Room thermostat is the scope of customer and installed by th...

Страница 10: ...DCU STANDARD 1 PHASE MODEL Legend COMP Compressor RU Potential relay F MOT Fan Motor CCH Crankcase Heater HP SW High Pressure Switch LP SW Low Pressure Switch LLSV Liquid Line Solenoid Valve E L N 1 2...

Страница 11: ...nside the tubes it is recommended to flow dry nitrogen through the tubing during the brazing operations Alight flow of about CFM is sufficient Assurance of adequate velocity thus ensuring oil return c...

Страница 12: ...100 free of leaks Use of electronic leak detection equipment is highly recommended due to its potential accuracy when used correctly in accordance with the manufacturer s instructions If trace amount...

Страница 13: ...g the system always use a pressure regulating valve on the nitrogen cylinder discharge The pressure regulator must be able to reduce the pressure down to 1 to 2 psig and maintain this pressure The reg...

Страница 14: ...ure related problems SYSTEM CHARGING Failure to properly charge the system can result in serious injury or death from explosion or fire Follow these precautions when charging a system Do not operate t...

Страница 15: ...an motor mounting screws fan blade tightening screw shroud electrical boxes etc Check that the safety and pressure controls are connected and set correctly Check that the suction and liquid Service va...

Страница 16: ...ed refrigerant charge and correct any probable malfunction observed Always re assemble the enclosure panels when operational check out procedure is completed Never leave loose or not properly tightene...

Страница 17: ...r if shipping damage is discovered If damages to the packing are obvious but no visible damage on the unit or the parts are noted then a report should be compiled and a claim for probable hidden damag...

Страница 18: ...d or fuse open or removed Compressor motor winding open or short Wiring improper or loose Compressor motor has a ground fault also known as short circuit to ground B COMPRESSOR NOT STARTING HUMS BUT T...

Страница 19: ...ut out due to Liquid line solenoid leaking Undercharge of refrigerant Restriction in expansion device REFRIGERATION ACCESSORIES INSTRUCTIONS FOR THE FILTER DRIER SOLDER TYPE Low voltage to compressor...

Страница 20: ...20 IINSTRUCTIONS FOR THE SIGHT GLASS SOLDER TYPE...

Страница 21: ...21 INSTRUCTIONS FOR THE SOLENOID VALVE SOLDERING TYPE...

Страница 22: ...22...

Страница 23: ...hile transportation If require additional wooden board to be nailed CONTACT INFORMATION Please write us back with your valuable Feedback to our sales representative The information in this booklet are...

Страница 24: ...Mumbai 400705 Ph No 022 65176929 Old No 37 New No 6 Arcot Road VADAPALANI Chennai 600 026 Supra CFA 23652244 23652300 4 2 1A Rustomjee Street Kolkata 700019 Ph No 033 24606026 Fax No 033 24606027 Gala...

Отзывы: