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ADDITIONAL CHARGE

SPECIAL PRECAUTIONS WHEN CHARGING UNIT WITH SCROLL COMPRESSORS

The refrigerant is pre-charge in the outdoor unit. If the piping length is less than 7.5m, then additional charge after vacuuming 
is not necessary. When the piping length is more than 7.5m, use the table below.

Cooling only

Example:
FDM30JEV1K & RD30JEV1K with 13m piping length, additional piping length is 5.5m. Thus,
Additional charge  =  5.5[m] x 55[g/m]
 

=  302.5[g]

Model

Indoor

FDM50JEV1K

FDM60JEV1K

Outdoor

RD50JEY1K

RD60JEY1K

Additional charge [g/m]

54

102

Model

Indoor

FDM20JEV1K FDM25JEV1K FDM30JEV1K FDM40JEV1K FDM40JEV1K

Outdoor

RD20JEV1K

RD25JEV1K

RD30JEV1K

RD40JEV1K

RD40JEY1K

Additional charge [g/m]

19

38

55

65

65

These precautions are intended for use with Scroll compressors only with R22 and R410A refrigerants but are not applied to 
others competitive Scroll compressors.
Scroll compressors have a very high volumetric ef

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 ciency and quickly pump a deep vacuum if there is insuf

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 cient refrigerant 

in the system or if refrigerant is added too slowly. Operation with low suction pressure will quickly lead to very high discharge 
temperatures. While this process is happening, the scrolls are not being well lubricated – scrolls depend on the oil mist in the 
refrigerant for lubrication. A lack of lubrication leads to high friction between the scroll 

ß

 anks and tips and generates additional 

heat. The combination of heat of compression and heat from increased friction is concentrated in a small localized discharge 
area where temperatures can quickly rise to more than 300°C. These extreme temperatures damage the Scroll spirals and the 
orbiting Scroll bearing. This damage can occur in less than one minute especially on larger compressors. Failure may occur 
in the 

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 rst few hours or the damage done during 

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 eld charging may show up some time later. Other typical 

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 eld charging 

problems include undercharging, overcharging, moisture or air in the system etc. In time each one of these problems can 
cause compressor failure.
Minimal equipment is required for 

Þ

 eld charging. The minimum equipment required to do a satisfactory job is:-

 

1.  Set of service gauges 

4.  Vacuum gauge

 

2.  Hoses 

5.  Scales

 

3.  Vacuum pump 

6.  Thermometer

The proper refrigerant charge should follow the volume as recommended by manufacturer and recommendation should be 
followed by the installer.

1. Charging procedures – Single phase compressors

   Evacuate the system to -760mmHg. To reduce evacuation time, use short, large diameter hoses and connect to unrestricted 

service ports on the system. Quality of vacuum cannot be determined by time – a reliable vacuum gauge must be used. (etc. 
electronic vacuum gauge)

   Turn the refrigerant cylinder upside down, purge the charging hose and charge liquid through the liquid line charging port 

until refrigerant no longer 

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 ows or until the correct charge has been weighed in. If additional charge is required start the 

system and slowly bleed liquid into the suction side until the system is full.

   

It  recommends  charging  liquid  in  a  CONTROLLED  manner  into  the  suction  side  until  the  system  is  full

This recommendation does not hold true for reciprocating compressors where liquid charging into the suction side could 
cause severe damage.

   Carefully monitor the suction and discharge pressures – ensure that the suction pressure does not fall below 25 psig (1.7 

bar) at any time during the charging process.

Dip-pipe

Liquid withdrawal

Invert cylinder 
without dip-pipe

Summary of Contents for R22

Page 1: ...ALLATION MANUAL Installation Manual R22 Split Series MODELS FDM20JEV1K RD20JEV1K FDM25JEV1K RD25JEV1K FDM30JEV1K RD30JEV1K FDM40JEV1K RD40JEV1K RD40JEY1K FDM50JEV1K RD50JEY1K FDM60JEV1K RD60JEY1K R22...

Page 2: ......

Page 3: ...2 261 411 351 225 211 232 213 114 FDM25JEV1K 31 1176 1137 1097 10 1200 72 261 411 351 225 211 232 213 114 O OUTLINE AND DIMENSIONS Original Instruction Dimension Model A B C D E F G H I J K L M N O P...

Page 4: ...44 93 149 101 113 603 126 164 17 34 3 23 73 75 362 RD25 30JEV1K 855 730 328 520 182 44 93 149 101 113 603 126 164 17 34 3 23 73 75 362 Indoor Unit All dimensions are in mm Dimension Model A B C D E F...

Page 5: ...l dimensions are in mm A M N P D K L E F B R G U Q S J H C T Dimension Model A B C D E F G H J K L M N P Q R S T U RD40JEV1K RD40JEY1K RD50JEY1K RD60JEY1K 1030 852 428 410 412 827 72 196 91 488 448 14...

Page 6: ...eremineraloil oilvapour or oil steam exist this may cause plastic part to melt or deform as a result of excessive heat or chemical reaction When the unit is used in kitchen keep flour away from going...

Page 7: ...NSTALLATION DIAGRAM Supply Duct Air Intake Wrap the insulated pipe with the nishing tape from bottom to top Air Intake Outdoor unit Return Duct Hanger Air Discharge Drain Piping Thermal Insulation Ind...

Page 8: ...hstand the weight Field supply Washer for hanger bracket attached Tighten Detail A See Detail A Air inlet side Air outlet side Aluminium tape eld supply Insulation material eld supply Center distance...

Page 9: ...mpared to the outside atmospheric pressure when the unit is operating The drain trap is to avoid possibility of splashes or an odor Keep pipes as straight as possible for easy cleaning and to prevent...

Page 10: ...low suf cient space for maintenance around the unit Ensure that there is no obstruction of air ow into or out of the unit Remove obstacles which block air intake or discharge The location must be well...

Page 11: ...Y1K RD60JEY1K Max allowable length m 40 40 50 50 50 45 35 Max allowable elevation m 20 20 30 30 30 25 15 Liquid pipe size mm in 6 35 1 4 9 52 3 8 9 52 3 8 9 52 3 8 9 52 3 8 9 52 3 8 12 70 1 2 Gas pipe...

Page 12: ...sert the are nuts mounted on the connection parts of both indoor and outdoor unit into the copper pipes The exact length of pipe protruding from the face of the swaging block is determined by the arin...

Page 13: ...n cable size mm2 Number of conductors 1 0 4 1 0 4 Recommended time delay fuse A 20 25 COMP L1 N1 L Power Supply Cable Outdoor unit Terminal Block COMP Interconnection cable Indoor unit Terminal Block...

Page 14: ...nection in the supply mains with a contact separation of at least 3mm COMP L L N N COMP L N R S T N There must be an all pole disconnection in the supply mains with a contact separation of at least 3m...

Page 15: ...ction cable Outdoor unit Terminal Block Indoor unit Terminal Block Model Indoor FDM50JEV1K FDM60JEV1K Outdoor RD50JEY1K RD60JEY1K Voltage range Indoor 220 240V 1Ph 50Hz Outdoor 308 415V 3N 50Hz Power...

Page 16: ...are properly xed to avoid any gap Use round crimp style terminal for connecting wires to the power supply terminal block Connect the wires by matching to the indication on terminal block Refer to the...

Page 17: ...the suction valve 3 way and liquid valve 2 way in anti clockwise direction with 4mm key for hexagon sacked screw Charge Operation This operation must be done by using a gas cylinder and a precise wei...

Page 18: ...e orbiting Scroll bearing This damage can occur in less than one minute especially on larger compressors Failure may occur in the rst few hours or the damage done during eld charging may show up some...

Page 19: ...n preventing dangerously high discharge temperatures during charging The protection module will trip and lock the compressor out for 30 minutes It is not normally necessary to wait 30 minutes for the...

Page 20: ...inage are in right side of unit Test run 1 Conduct a test run after water drainage test and gas leakage test 2 Watch out for the following a Is the electric plug rmly inserted into the socket b Is the...

Page 21: ...tral detergent solution Do not use gasoline volatile substances or chemical to clean the indoor unit 1 2 At least once every 2 weeks More frequently when necessary Indoor Fan Check for any abnormal no...

Page 22: ...MEMO...

Page 23: ......

Page 24: ...vise any of the specification and design contain herein at any time without prior notification Lot 60334 Persiaran Bukit Rahman Putra 3 Taman Perindustrian Bukit Rahman Putra 47000 Sungai Buloh Selang...

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