Refrigerant System Pressure Access Ports; Puron (R-410A) Refrigerant - Bryant 547K 04-07 Series Service And Maintenance Instructions

Clamp
TXV Sensing Bulb
NOTE: Sensing bulb insulation removed for clarity.
Fig. 20 — TXV Valve and Sensing Bulb Location
SEAT
5/8" HEX 0.47
1. Third-party trademarks and logos are the property of their respective owners.
Thermostatic
Expansion
Valve (TXV)
1/2-20 UNF RH
0.596
30°
This surface provides a metal to metal seal when
torqued into the seat. Appropriate handling is
required to not scratch or dent the surface.
Fig. 21 — CoreMax

Refrigerant System Pressure Access Ports

There are 2 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 con-
nection fittings are standard 1/4 in. SAE male flare couplings.
The brass fittings are 2-piece high flow valves, with a recepta-
cle 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 neces-
sary. Service tools are available from RCD that allow the re-
placement of the check valve core without having to recover
the entire system refrigerant charge. Apply compressor refrig-
erant oil to the check valve core's bottom o-ring. Install the
fitting body with 96 ± 10 in.-lb (10.85 ± 1.1 Nm) of torque; do
not over-tighten.

PURON (R-410A) REFRIGERANT

This unit is designed for use with Puron
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 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.
CORE
(Part No. EC39EZ067)
Washer
O-Ring
1/2" HEX
®1 Access Port Assembly
14
® (R-410A) refrigerant.
45°
Depressor per AHRI 720
+.01/–.035
From Face of Body
7/16-20 UNF RH