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DRIP SHIELD REMOVAL
8 Refrigerant Lines
This product is factory-shipped with R410A and dry
nitrogen mixture gas under pressure. Use appropriate
service tools and follow these instructions to prevent
injury.
A quenching cloth is strongly recommended to prevent
scorching or marring of the equipment finish when
brazing close to the painted surfaces. Use brazing
alloy of 5% minimum silver content.
NOTE: Refrigerant tubing must be routed to allow adequate
access for servicing and maintenance of the unit.
Do not install the air handler in a location that violates the
instructions provided with the condenser. If the unit is located
in an unconditioned area with high ambient temperature and/
or high humidity, the air handler may be subject to nuisance
sweating of the casing. On these installations, a wrap of 2"
fiberglass insulation with a vapor barrier is recommended.
8.1 Tubing Size
For the correct tubing size, follow the specification for
the condenser/heat pump.
8.2 Tubing Preparation
All cut ends are to be round, burr free, and clean. Failure
to follow this practice increases the chances for refriger-
ant leaks. The suction line is spun closed and requires
tubing cutters to remove the closed end.
NOTE: To prevent possible damage to the tubing joints,
do not handle coil assembly with manifold or flowrator
tubes. Always use clean gloves when handling coil as-
semblies.
Figure 9
CAUTION
Applying too much heat to any tube can melt the tube. Torch
heat required to braze tubes of various sizes must be
proportional to the size of the tube. Service personnel must
use the appropriate heat level for the size of the tube being
brazed.
8.3 Special Instructions
Units without a factory installed TXV come equipped
with a flowrator piston for refrigerant expansion. For
most installations with matching applications, no
change to the flowrator piston is required. However, in
mix-matched applications, a flowrator piston change
may be required. See the Goodman
(provided in the literature packet) or consult your local
distributor for details regarding mix-matched flowrator
piston sizing. If the mix-match application requires a
different flowrator piston size, change the flowrator pis-
ton in the flowrator body on the indoor coil before in-
stalling the coil and use the procedure in section 8.4.
NOTE: The use of a heat shield is strongly recom-
mended when brazing to avoid burning the serial plate
or the finish of the unit. Heat trap or wet rags must be
used to protect heat sensitive components such as ser-
vice valves and TXV valves sensing bulb.
8.4 Tubing Connections for Flowrator Model
1. Loosen the 13/16 nut 1 TURN ONLY to allow high pres-
sure tracer gas to escape. No gas indicates a possible
leak.
2. After the gas has been expelled, remove the nut and
discard the black or brass cap plastic seal.
3. Remove the flowrator piston to verify it is the correct
size for the outdoor unit being installed and then replace
the piston (changing size, if needed). See piston kit chart
in the literature kit for appropriate piston size.
4. Remove the spin closure on the suction line using a
tube cutter and deburr the tube.
5. Insert the suction line into the connection, slide the in-
sulation and the rubber grommet at least 18" away from
the braze joint.
SUCTION LINE
WITH SPIN CLOSURE
SUCTION SPUN END AND GROMMET
7
®
piston kit chart
RUBBER
GROMMET
Figure 10
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