R and V Works FF6 Informations techniques télécharger pdf (Page 9)

Compressor Application Manual

7

The compressor motors appropriate for

these two systems are called:

LST – Low Starting Torque

used in capillary systems.

HST – High Starting Torque, used in

expansion valve systems.

Classification

Control

System

Example of

Application

LST

Capillary

Refrigerators,

freezers and

drinking fountains

HST compressors may be used in

systems using LST (capillary tube)

compressors when the off cycles are shorter,

not permitting equal equalized pressures.

However, LST compressors cannot be used

in expansion valve systems.

1.2 - Evaporation temperature

Another factor influencing the choice of

the compressor is the evaporator

temperature range required by the

system. We now point out two extreme

situations:

• Freezers that work at low temperatures,

varying between -25

o

C (-13

o

F) and

-35

o

C (-31

o

F).

Compressors

Indicated

All Embraco

compressors

HST

Expansion valve

(or Capillary)

Only compressors

with the letter X in

the code of model

e.g.: FFI 12BX,

FFI 12HBX etc...

Commercial food

counters, soft

drink machines,

Refrigerated

food counters and

displays and

walk-in refrigerators

III

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 79 80

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