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Просмотр инструкции кондиционера Daikin JEHSCU-CM1, страница 4
O-CU06-DEC14-1
All specifications are subjected to change by the manufacturer without prior notice. The English text is the
original instruction. Other languages are the translations of the original instructions.
4
compressor to decide to add the oil after minimum 2
hours operation.
• It is recommended as well to install the MOP (Maximum
Operation Press ure), expansion valve for medi um
evaporating temperat ure units, if the working suction
pressure during start proc edure especiall y aft er defrost
cycle, is out of the limit, as refer to the table provided.
Recommend compressor working press ure range
3.5 Pressure testing
• Make sure that both service valves are closed when
running a pressure test on field piping, always use an
inert, dry gas such as Nitrogen
• The pressure differenti al between the high and low side
shall not higher than below.
Compressor
Pressure different i al
AE/AJ
19 barg
(275 psig)
MTZ/ZB*KQE
30 barg
(435 psig)
• Test pressures shall be as shown follows.
Test pressure
High side
Low side
28 barg
(405 psig)
19 barg
(275 psig)
• If there is pressure drop, check the leakage portion.
3.6 Leak detection
• Make sure that all manual valves are open
• Perform a leak test of the system using nitrogen mixed
with the refrigerant to be used
• Do not use CFC for leak testing the condensing unit
which will be used with HFC refrigerants
• The use of leak testing fluids is not recommended as
this may interact with the lubricants own additives
3.7 Vacuum - moisture removal
Air and moisture reduce service life and increase
condensing press ure causing abnormal l y high discharge
temperatures l ikel y t o destroy the oil’s l ubricating properties.
The risk of acid formation is also increased by air and
moisture and copper plati ng can be generated in this way.
All these phenomena can cause mechanical and electrical
failure.
3.8 Safety pressure switch settings
The pressure switch fitted t o condensing units with auto
reset for low pressure and manual reset for high pressure
are NOT
factory preset.
1. Low pressure (LP) setting
spindle
2. Differenti al sett i ng spindle, LP
3. Main arm
5. High pressure (HP) setting
spindle
7. Main spring
8. Differenti al spri ng
9. Bellows
10. LP connection
11. HP connection
12. Switch
13. Terminals
14. Earth terminal
15. Cable entry
16. Tumbler
18. Locking plate
19. Arm
20. Manual reset
button
High pressure safety (Manual reset)
The high pressure safety switch is required to protect the
compressor from working out of its envelope. The high
pressure switch shall set equal or lower than bel ow values
depending on the type of refrigerant, application and the
ambient condition.
Model
AE/CAJ/TAJ
MTZ/ZB
Refrigerant
R404A/
R407A/
R407F
R134a
R404A/
R407A/
R407F
R134a
Cut Out (barg)
27.7
18
27.7
18
Cut Out (psig)
402
261
402
261
Model
AE/CAJ/TAJ
MTZ
ZB*KQE
Refrigerant
R404A/
R407A/
R407F
R134a R404A R134a R407C
R404A/
R407A/
R407F
R134a
Application M* M* M* M* M* M* M*
Cut out (barg) 1.5 0.5 1 0.6 1.4 2 0.6
Cut out (psig)
21.8
7.3
14.5
8.7
20.3
29
8.7
Compressor Mode l
Refrigerant R404A R134a R404A R134a R407C R404A R134a
Wor king Pressure
Range High S ide ,
(barg)
13.2 - 27.7 6.7 - 15.8 13.2 - 27.7 7.9 - 22.6 12.5 - 29.4 7.14 - 27.6 6.6 - 22.6
Wor king Pressure
Range Low Side,
(barg)
1.5 - 8.3 0.1 - 3.9 1.0 -7.2 0.6 - 4.7 1.4 - 6.6 1.98 - 7.14 0.6 - 3.8
Med Temp
MTZ
Med Temp
ZB*KQE
Med Temp
AE/CAJ/TAJ
Important No te
Ensure that a good qualit y vacuum pump is used to pull
a minimum vacuum of -0.1 barg (250 microns) or less.
Ensure that no press ure increase during 1 hour or more
after stop vacuuming. If pressure increase, there is
moisture or leakage along the pipeline.
Important No te
Moisture prevents proper functioning of the compressor
and the refrigerat i on system
flare
Compressor
Model
Med Temp
AE/CAJ/TAJ
Med Temp
MTZ
Med Temp
ZB*KQE
Refrigerant
R404A/R407A/
R407F
R134a
R404A
R134a
R407C
R404A/R407A/
R407F
R134a
Working
Pressure
Range High
Side (barg)
13.2 – 27.7
6.7 –
15.8
13.2 –
27.7
7.9 –
22.6
12.5 –
29.4
7.14 – 27.6
6.6 –
22.6
Working
Pressure
Range Low
Side, (barg)
1.5 – 8.3
0.1 –
3.9
1.0 –
7.2
0.6 –
4.7
1.4 –
6.6
1.98 – 7.14
0.6 –
3.8
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