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8
1/2-20 UNF RH
30
0.596
.47
5/8” HEX
SEAT
CORE
WASHER
DEPRESSOR PER ARI 720
+.01/-.035
FROM FACE OF BODY
7/16-20 UNF RH
O-RING
45
torqued into the seat. Appropriate handling is
required to not scratch or dent the surface.
1/2" HEX
This surface provides a metal to metal seal when
o
o
(Part No. EC39EZ067)
C08453
Fig. 11 -- CoreMax Access Port Assembly
PURONR (R410A) REFRIGERANT
This unit is designed for use with Puron (R410A)
refrigerant. Do not use any other refrigerant in this
system.
Puron (R410A) 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 cyl inder 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 (R410A) 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 l iquid from the cylinder,
pass it through the m etering device at the gauge set and
then pass it into the suction line as a vapor. Do not remove
Puron (R410A) from the cylinder as a vapor.
Refrigerant Charge
Amount of refrigerant charge is listed on the unit’s
name plate. Refer to 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 Cooling Charging Charts, Fig. 12, vary refrigerant
until the conditions of the appropriate chart are met. Note
the charging charts are different from 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 device 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.
To Use Cooling Charging
Charts
Take the outdoor ambient temperature and read the
suction pressure gauge. Refer to chart to determine what
suction temperature should be. If suction temperature is
high, add refrigerant. If suction temperature is low,
carefully recover some of the charge. Recheck the suction
pressure as charge is adjusted.
SIZE DESIGNATION
NOMINAL TONS
REFERENCE
04A,B,C 3
05A,B,C 4
06A,B,C 5
07A,C 6
08A,C 7.5
09A,C 8.5
12A,C 10
EXAMPLE:
Model 580J*04A (3 ton)
Outdoor Temperature 85_F(29_C)..................
Suction Pressure 140 psig (965 kPa).................
Suction Temperature should be 60_F(16_C)..........
580J