Carrier Aquazone 50WD handleiding
Handleiding
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To determine that a TXV has failed, verify the following:
• The suction pressure is low and the valve is non-
responsive.
• The TXV sensing bulb can be removed from the suction
line and warmed by holding the bulb in your hand. This ac-
tion should result in an increase in the suction pressure
while the compressor is operating. The sensing bulb can
also be chilled by immersion in ice water, which should re-
sult in a decrease in the suction pressure while the com-
pressor is operating. No change in the suction pressure
would indicate a nonresponsive valve.
• Simultaneous LOW suction pressure, HIGH refrigerant
subcooling and HIGH superheat.
• LOW suction pressure, LOW subcooling and HIGH super-
heat may indicate an undercharge of refrigerant. HIGH
subcooling and LOW superheat may indicate an over-
charge of refrigerant. The suction pressure will usually be
normal or high if there is an overcharge of refrigerant.
• LOW suction pressure and frosting of the valve and/or
equalizer line may indicate a failed valve. However, these
symptoms may also indicate an undercharge of refrigerant.
Calculate the subcooling and superheat to verify a failed
valve or refrigerant charge issue.
Repair
Figure 53 illustrates the typical refrigerant diagram for 50WD
units.
See Table 34 for compressor characteristics and Table 35 for addi-
tional troubleshooting information.
WARNING
Most TXVs are designed for a fixed superheat setting and are
therefore considered non-adjustable. Removal of the bottom
cap will not provide access for adjustment and can lead to
damage to the valve or equipment, unintended venting of re-
frigerant, personal injury, or possibly death.
CAUTION
Always recover the refrigerant from the system with suitable
approved tools, recovery equipment, and practices prior to at-
tempting to remove or repair any TXV.
IMPORTANT: Repair of any sealed refrigerant system requires
training in the use of refrigeration tools and procedures. Repair
should only be attempted by a qualified service technician. A
universal refrigerant handling certificate will be required. Local
and/or state license or certificate may also be required.
CAUTION
Disconnect power from unit before removing or replacing
connectors, or servicing motor. Wait 5 minutes after discon-
necting power before opening motor.
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Productinformatie
| Merk | Carrier |
| Model | Aquazone 50WD |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 15865 MB |
