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Outdoor Fan 2
Outdoor Fan 1
Fig. 19 — 575J*07G/H Exterior
Outdoor Fan 2
Outdoor Fan 1
Fig. 20 — 575J*08M/N Exterior
Outdoor Fan 1
Service
Valves
OUTDOOR COIL METERING DEVICES
The metering devices are multiple fixed-bore devices
(Acutrol
liquid header, located at the entrance to each outdoor coil cir-
cuit path. These are non-adjustable. Service requires replacing
the entire liquid header assembly.
To check the outdoor coil, disconnect the outdoor fan motor.
Start the circuit in a Heating Mode (jumper R to W1) and ob-
serve the frost pattern on the face of the outdoor coil. A frost
pattern should develop uniformly across the face of the outdoor
coil starting at each tube at the Acutrol nipple locations.
Failure to develop frost at an outlet tube can indicate a plugged
or a missing orifice.
REFRIGERANT SYSTEM PRESSURE ACCESS PORTS
There are two access ports in each circuit — on the suction
tube near the compressor and on the discharge tube near the
compressor. (See Fig. 22-25.) These are brass fittings with
black plastic caps. The hose connection fittings are standard
1/4 in. SAE Male Flare couplings.
The brass fittings are two-piece High Flow valves, with a re-
Service
ceptacle base brazed to the tubing and an integral spring-closed
Valves
check valve core screwed into the base. (See Fig. 26.) 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 refrig-
erant oil to the check valve core's bottom o-ring. Install the
fitting body with 96 ±10 in.-lb of torque; do not overtighten.
1. Third-party trademarks and logos are the property of their respective
owners.
25
Outdoor Fan 2
Fig. 21 — 575J*12G/H Exterior
™1
) swaged into the horizontal outlet tubes from the
Service
Valves
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