Refrigerant Lines - Goodman AVPTC42D14 series Installation & Operating Instructions Manual

5. Re-install the center support (if removed) using the two (2) screws removed in Step 4.
6. Re-install the access panels removed in Step 1 as shown in Figure 9.
7. The bottom left drain connection is the primary drain for this application and condensate drain line must be attached to
this drain connection. The top connection of the three drain connections on the drain pan must remain plugged for this
application. The bottom left drain connection is for the secondary drain line (if used).
7

Refrigerant Lines

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.
7.1 Tubing Size
For the correct tubing size, follow the specification for
the condenser/heat pump.
7.2 Tubing Preparation
All cut ends are to be round, burr free, and clean. Failure
to follow this practice increases the chances for refrigerant 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 assem-
blies.
NOTE: The use of a heat shield is strongly recommended
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 service valves and TXV valves sensing bulb.
7.3 Tubing Connections for TXV Models
TXV models come with factory installed TXV with the bulb pre-
installed on the vapor tube.
1. Remove refrigerant tubing panel or coil (lower) access panel.
2. Remove access valve fitting cap and depress the valve stem in
access fitting to release pressure. No pressure indicates pos-
sible leak.
3. Replace the refrigerant tubing panel.
4. Remove the spin closure on both the liquid and suction tubes using
a tubing cutter.
5. Insert liquid line set into liquid tube expansion and slide grommet
about 18" away from braze joint.
6. Insert suction line set into suction tube expansion and slide insula-
tion and grommet about 18" away from braze joint.
7. Braze joints. Quench all brazed joints with water or a wet rag upon
completion of brazing.
NOTE: The sensing bulb must be permanently located. A heat shield,
heat trap, or wet rag must be used during brazing to prevent damage to
the TXV valve.
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.
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.
REFRIGERANT BULB
MUST BE POSITIONED
BETWEEN 10 & 2 O'CLOCK
SUCTION LINE
WITH SPIN CLOSURE
7
REFRIGERANT BULB
MUST BE POSITIONED
BETWEEN 10 & 2 O'CLOCK
Figure 10
RUBBER
GROMMET
Suction Line Grommet
Figure 11