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5.
Thoroughly apply Totaline environmentally sound coil
cleaner solution to all coil surfaces, including finned area,
tube sheets and coil headers.
6.
Hold the garden sprayer nozzle close to finned areas and
apply cleaner with a vertical, up-and-down motion.
7.
Avoid spraying in a horizontal pattern to minimize poten-
tial for fin damage.
8.
Make sure the cleaner thoroughly penetrates deep into the
finned areas.
9.
Interior and exterior finned areas must be thoroughly
cleaned.
10. Finned surfaces should remain wet with cleaning solution
for 10 minutes.
11. Make sure surfaces are not allowed to dry before rinsing.
Reapply cleaner as needed to ensure 10 minute saturation
is achieved.
12. Thoroughly rinse all surfaces with low-velocity clean
water using a downward rinsing motion of the spray noz-
zle. Protect fins from damage from the spray nozzle.
Evaporator Coil Metering Devices
The metering devices are multiple fixed-bore devices (Acutrol™)
swedged into the horizontal outlet tubes from the liquid header, lo-
cated at the entrance to each evaporator coil circuit path. These are
non-adjustable. Service requires replacing the entire liquid header
assembly.
To check for possible blockage of one or more of these metering
devices, disconnect the supply fan contactor (IFC) coil, then start
SEAT
5/8" HEX
0.47
1. CoreMax is a registered trademark of Fastest, Inc.
1/2-20 UNF RH
0.596
30°
WASHER
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. 14 — CoreMax
the compressor and observe the frosting pattern on the face of the
evaporator coil. A frost pattern should develop uniformly across
the face of the coil starting at each horizontal header tube. Failure
to develop frost at an outlet tube can indicate a plugged or a miss-
ing orifice.
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 connec-
tion fittings are standard
The brass fittings are two-piece High Flow valves, with a recep-
tacle base brazed to the tubing and an integral spring-closed
check valve core screwed into the base (see Fig. 14). This
Schrader 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 (P/N: P920-
0010) that allow the replacement of the schrader valve core
without having to recover the entire system refrigerant charge.
Apply compressor refrigerant oil to the schrader valve core's
bottom o-ring. Install the fitting body with 96 ± 10 in.-lb (10.85
± 1.13 Nm) of torque; do not overtighten.
NOTE: The High-Flow valve has a black plastic cap with a rubber
o-ring located inside the cap. This rubber o-ring must be in place
in the cap to prevent refrigerant leaks.
CORE
(Part No. EC39EZ067)
1/2" HEX
O-RING
1
Access Port Assembly
10
/
-in. SAE male flare couplings.
1
4
45°
DEPRESSOR PER AHRI 720
+.01/-.035
FROM FACE OF BODY
7/16-20 UNF RH
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Table of Contents
Troubleshooting
