Puronr (R- - 410A) Refrigerant - Carrier 48HC D17 Series Service And Maintenance Instructions

SEAT
.47
5/8" HEX
PURON (R- - 410A) REFRIGERANT
This unit is designed for use with Puron (R- - 410A)
refrigerant. Do not use any other refrigerant in this
system.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution can result in damage to
components.
The compressor is in a Puron (R- - 410A) 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 POE oil to the atmosphere. This
exposure to the atmosphere can cause contaminants
that are harmful to R- - 410A components to form.
Keep POE oil containers closed until ready for use.
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, with the
access valve at the top, when adding liquid refrigerant for
charging. For a cylinder without a dip tube, invert the
cylinder, with the access valve located on the bottom,
when adding liquid refrigerant.
Because Puron (R- - 410A) refrigerant is a blend, it is
strongly recommended that refrigerant always be removed
from the cylinder as a liquid. Admit liquid refrigerant into
the system in the discharge line when breaking refrigerant
system vacuum while the compressor is OFF. Only add
refrigerant (liquid) into the suction line while the
compressor is operating. If adding refrigerant into the
suction line, use a commercial metering/expansion device
at the gauge manifold; remove liquid from the cylinder,
pass it through the metering device at the gauge 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.
1/2-20
UNF RH
0.596
30 o
WASHER
O-RING
This surface provides a metal to metal seal when
torqued into the seat. Appropriate handing is
required to not scratch or dent the surface.
Fig. 24 - - CoreMax Access Port Assembly
Refrigerant Charge
Unit panels must be in place when unit is operating during
the charging procedure. To prepare the unit for charge
adjustment:
No Charge
Use standard evacuating techniques. Evacuate system
down to 500 microns and let set for 10 minutes to
determine if system has a refrigerant leak. If evacuation
level raises to 1100 microns and stabilizes, the system has
moisture in it and should be dehydrated per GTAC2- - 5
recommends.
If system continues to rise above 1100 microns, the
system has a leak and should be pressurized and leak
tested using appropriate techniques as explained in
GTAC2- - 5. After evacuating system, weigh in the
specified amount of refrigerant as listed on the unit rating
plate.
Low- - Charge Cooling
Using Cooling Charging Charts (Fig. 25, 26, 27, 28, 29
and 30 ), vary refrigerant until the conditions of the
appropriate chart are met. Note the charging charts are
different from the type normally used. Charts are based on
charging the units to the correct superheat for the various
operating conditions. Accurate pressure gauge and
temperature sensing devices are required. Connect the
pressure gauge 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.
20
CORE
(Part No. EC39EZ067)
1/2" HEX
7/16-20 UNF RH
o
45
DEPRESSOR PER ARI 720
+.01/-.035
FROM FACE OF BODY
C08453