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SEAT
.47
5/8" HEX
Refrigerant System Pressure Access Ports
There are two access ports in the system - - on the suction
tube near the compressor and on the discharge tube near
the compressor. These are brass fittings with black plastic
caps. The hose connection fittings are standard 1/4 SAE
male flare couplings.
The brass fittings are two- - piece High Flow valves, with a
receptacle base brazed to the tubing and an integral
spring- - closed check valve core screwed into the base. See
Fig. 21.
This check valve is permanently assembled into this core
body and cannot be serviced separately; replace the entire
core body if necessary. Service tools are available
allowing the replacement of the check valve core without
having to recover the entire system refrigerant charge.
Apply compressor refrigerant oil to the check valve core's
bottom o- - ring. Install the fitting body with 96 10 in- - lbs
of torque; do not overtighten.
PURONR (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, invert 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 cylinder 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 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
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. 21 - - CoreMax Access Port Assembly
remove Puron (R- - 410A) refrigerant from the cylinder as a
vapor.
Refrigerant Charge
Amount of refrigerant charge is listed on the unit's
nameplate.
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. 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.
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.
16
CORE
(Part No. EC39EZ067)
1/2" HEX
Refer
to
Carrier
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.
o
45
DEPRESSOR PER ARI 720
+.01/-.035
FROM FACE OF BODY
7/16-20 UNF RH
C08453
GTAC2- - 5 Charging,
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