APC INROOM ACPSC3000 Instrucciones de operaciones Pagina 77
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InRoom CW/DX – Operating Instructions 77
10.3 Refrigerant circuit
Refrigerant charge - Quantity and Purity
Quantity - Check the sight glass and the LP switch.
An insuffi cient charge causes the formation of bubbles in the sight glass or, in extreme cases, triggers the
LP-switch. An operation with an insuffi cient refrigerant quantity over a longer period leads to a reduction
of cooling capacity and to high superheating temperatures, which have a disadvantageous effect on the
compressor lifetime.
If a leak is detected:
• Using a refrigerant recovery machine, recover the refrigerant
to approximately 0 psi (0 bar
ab so lut
).
• Dispose the refrigerant according to the EPA regulations.
• Fill the circuit with nitrogen to 14.5 psi (1 bar
ab so lut
).
• Repair the leak.
• The circuit has to be pressurized and purged by several (at least 3) fi llings and extractions of nitro-
gen.
• Change the fi lter drier.
• Fill with R407C according to weight (see technical data, beginning on page 24).
Caution:
R407C must be charged in a liquid state, in order that the composition of the refrigerant
does not change.
Quantity - Check the HP switch
An overfi l ling of the circuit makes the condensation pressure rise and by that increases the power consump-
tion of the compressor. If the circuit is overfi lled the HP-switch triggers.
Purity - Check the sight glass and the fi lter drier.
Bubbles in the sight glass indicate that the charge is insuffi cient or that the fi lter drier is clogged.
A clogged fi lter drier, whose task is to clear the refrigerant of impurities and humidity, can be detected by a
temperature difference upstream and downstream from the fi lter drier.
Compare the color indicator in the center of the sight glass with the outer
ring scale.
green ---> ok.
yellow ---> humidity critical.
With too much humidity in the circuit, the expansion valve can freeze. In
addition to this, the ester oil in the compressor, which comes in contact
with the refrigerant, takes up humidity and loses its ability to lubricate.
In this case the refrigerant must be completely evacuated and recharged
according to the above described evacuation instruction.
Sight glass
- Operating Instructions 1
- Contents 3
- 1. Safety 5
- 1.3 Safety instructions 6
- 1.4 Handling refrigerants 6
- First aid measures 7
- Repairs and modifi cations 7
- 2. Description 8
- K A X X X 9
- H X 3 X X 9
- Page code 9
- E / 1107 / 14 / 7 9
- Unit Variants 10
- Air fl ow (D) 11
- A-system 12
- G-system 12
- GE-system 12
- ACW-System 13
- GCW-System 13
- CW-System 13
- 2.2 Intended use 14
- Electronic expansion valve 15
- Dehumidifying circuit 15
- Safety features 15
- Component protection 16
- 3. Refrigerant circuit 17
- 3.1 Cooling system A 18
- 3.2 Cooling system G 19
- 3.3 Cooling system GE 20
- 3.4 Cooling system ACW 21
- 3.5 Cooling system GCW 22
- 3.6 Cooling system CW 23
- 4. Technical data 24
- Modell 211 311 25
- Modell 452 612 862 26
- Modell 452 612 28
- Modell 400 660 900 1100 1500 29
- 4.7 Dimensions 30
- 4.8 Weights 30
- 4.12 Dimensional drawings 33
- 5. Transport/Storage 34
- 6. Installation 35
- 6.3.2 Refrigerant Piping 37
- Overfi lling 42
- Underfi lling 42
- External water circuit 43
- PCW 1100 CW 46
- PCW 1500 CW 46
- PCW 900 D 46
- Bottom view 46
- Siphon installation 48
- 6.4 Electrical connection 49
- 7. Commissioning 51
- 8. Dismantling and disposal 53
- 9. Options 54
- 9.1.3 Supply connections 55
- 10.43 in 56
- 9.1.5 Operation 57
- 1 2 3 4 58
- 9.1.6 Maintenance 61
- Alarm list 63
- Table 2 - Alarms (continued) 64
- 9.2 Reheat 65
- 9.3 Raised fl oor stand 66
- For cabinet size 1 - 2 68
- For cabinet size 3 - 4 69
- For cabinet size 5 70
- 9.4 Air side connection 71
- 9.5 Waterside connection 72
- 9.6 Condensers 73
- SCS 120 SSA 74
- SCS 525 DSA - SCS 683 DSA 75
- SCS 192 SSA - SCS 312 SSA 75
- SCS 252 DSA - SCS 312 DSA 75
- 10. Maintenance 76
- 10.3 Refrigerant circuit 77
- 10.4 Air circuit 78
- 10.5 Water circuit 79
- 10.6 Unit in general 79
- 10.7 Competences 79
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