516 01 3604 04
Specifications subject to change without notice.
7
Fig. 4 — Typical Unit Piping Schematic
Fig. 5 — CoreMax
1
Access Port Assembly
Refrigerant System Pressure Access Ports
There are two access ports in each circuit - on the suction
tube and the discharge tube near the compressor. These
are brass fittings with black plastic caps. The hose connec
-
tion fittings are standard
1
/
4
-in. SAE male flare couplings.
The brass fittings are two-piece High Flow valves, with a re
-
ceptacle base brazed to the tubing and an integral spring-
closed check valve core screwed into the base. See Fig. 5.
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 from
RCD that allow 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 and torque to
96
10 in-lbs (10.9
1 Nm). Do not exceed 106 in-lbs
(11.9 Nm) when tightening.
INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical Code) ANSI/NFPA 70 for special installa
-
tion requirements.
2. Determine unit location (from project plans) or select
unit location.
3. Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
COMPRESSOR
ACCUMULATOR
HPS
COMPRESSOR
ACCUMULATOR
HPS
Filter
Drier
2B
1B
LPS/LOC
Acutrol
DFT 1
Cooling Liquid Lines
DFT 2
2A
1A
1D
2D
Outdoor Coil
Indoor Coil
Comp 2
Comp 1
2C
1C
Strainer
Heating Mode Liquid Lines
Acutrol
Reversing
Valve
Reversing
Valve
1. CoreMax is a registered trademark of Fastent, Inc.
5/8
” HEX
0.47
30°
0.596
1/2-20 UNF RH
1/2
” HEX
45°
WASHER
O-RING
7/16-20 UNF RH
DEPRESSOR PER AHRI 720
+.01/-.035
FROM FACE OF BODY
This surface provides a metal to metal seal when
torqued into the seat. Appropriate handling is
required to not scratch or dent the surface.
SEAT
CORE
(Part No. EC39EZ067)
