Carrier Puron R-410A, Инструкции по обслуживанию и техническому обслуживанию

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PURON ® (R-410A) REFRIGERANT
This unit is designed for use with Puron (R-410A) refrigerant.
Do not use any other refrigerant in this system.
Puron (R-410A) refrigerant is provided in pink (rose) colored
cylinders. These cylinders are available with and without dip
tubes; cylinders with dip tubes will have a label indicating this
feature. For a cylinder with a dip tube, place the cylinder in the
upright position (access valve at the top) when removing liquid
refrigerant for charging. For a cylinder without a dip tube, in-
vert the cylinder (access valve on the bottom) when removing
liquid refrigerant.
Because Puron (R-410A) refrigerant is a blend, it is strongly
recommended that refrigerant always be removed from the cyl-
inder as a liquid. Admit liquid refrigerant into the system in the
discharge line. If adding refrigerant into the suction line, use a
commercial metering/expansion device at the gage manifold;
remove liquid from the cylinder, pass it through the metering
device at the gage set and then pass it into the suction line as a
vapor. Do not remove Puron (R-410A) refrigerant from the
cylinder as a vapor.
Refrigerant Charge
Amount of refrigerant charge is listed on the unit’s nameplate.
Refer to Carrier GTAC2-5 Charging, Recovery, Recycling and
Reclamation training manual and the following procedures.
Unit panels must be in place when unit is operating during the
charging procedure.
NO CHARGE
Use standard evacuating techniques. After evacuating system,
weigh in the specified amount of refrigerant.
LOW-CHARGE COOLING
Using Fig. 15-19, vary refrigerant until the conditions of the
appropriate chart are met. Note the charging charts are differ-
ent from type normally used. Charts are based on charging the
units to the correct superheat for the various operating condi-
tions. Accurate pressure gage and temperature sensing device
are required. Connect the pressure gage to the service port on
the suction line. Mount the temperature sensing device on the
suction line and insulate it so that outdoor ambient temperature
does not affect the reading. Indoor-air cfm must be within the
normal operating range of the unit.
TO USE COOLING CHARGING CHARTS
Take the outdoor ambient temperature and read the suction
pressure gage. Refer to chart to determine what suction tem-
perature should be. If suction temperature is high, add refriger-
ant. If suction temperature is low, carefully recover some of the
charge. Recheck the suction pressure as charge is adjusted.
EXAMPLE:
Model 50KC*A04
Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . 85°F (29°C)
Suction Pressure . . . . . . . . . . . . . . . . . . . . . 140 psig (965 kPa)
Suction Temperature should be . . . . . . . . . . . . . . . 60°F (16°C)
Compressor
LUBRICATION
The compressor is charged with the correct amount of oil at the
factory.
REPLACING COMPRESSOR
The compressor used with Puron refrigerant contains a POE
oil. This oil has a high affinity for moisture. Do not remove the
compressor’s tube plugs until ready to insert the unit suction
and discharge tube ends. Compressor mounting bolt torque is
65 to 75 ft-lb.
SIZE DESIGNATION NOMINAL TONS REFERENCE
A04 3
A05 4
A06 5
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage to
components.
The compressor is in a Puron
® refrigerant system and uses a
polyolester (POE) oil. This oil is extremely hygroscopic,
meaning it absorbs water readily. POE oils can absorb 15
times as much water as other oils designed for HCFC and
CFC refrigerants. Avoid exposure of the oil to the atmosphere.