Refrigerant Lines; Tubing Size; Tubing Preparation; Tubing Connections - Amana AVPEC Series Installation & Operating Instructions Manual

6. Reconnect the sensor wires and replace the insulation
securing it with wire ties on both sides as shown in Fig-
ure 2-2. Then, secure the wire harness to the corner
post using the screw mount wire ties provided.
7. Re-install the access panels removed in Step 1 as
shown in Figure 10.
8. Two drain ports located at the bottom drain pan (horizon-
tally oriented) are to be used for upflow and downflow
applications and the two on the side drain pan (vertically
oriented) are to be used when the unit is in horizontal
right or left configuration. When the unit is in upflow or
downflow configuration, the drain ports located on bot-
tom drain pan must be plugged and vice versa. Drain
ports located at lower elevation (closer to the ground) in
either configuration must be connected to the main drain
line and the higher is for the secondary drain line.

7 Refrigerant Lines

NOTE: Care should be taken to route refrigerant tubing in a
way which allows adequate access for servicing and main-
tenance of the air handling unit.
This product is factory-shipped with R410A and dry nitrogen mix-
ture gas under pressure. Use appropriate service tools and follow
these instructions to prevent injury.
Do not install the air handler in a location that violates the in-
structions 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, refer to the outdoor AIR CON-
DITIONING OR HEAT PUMP INSTALLATION & SERVICE
REFERENCE.

7.2 Tubing Preparation

A quenching cloth is strongly recommended to prevent scorching
or marring of the equipment finish when brazing close to the paint-
ed surfaces. Use brazing alloy of 5% minimum silver content.
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.
WARNING
WARNING
WARNING
IMPORTANT NOTE:
Ensure coil slides on the rails along the groove provided
on the drain pan side walls. Failure to do so will resul�n
improper condensate drainage.
COIL INSTALLATION FOR DOWNFLOW
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 assemblies.
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, electronic ex-
pansion valve (EEV), thermistors and pressure sensors.

7.3 Tubing Connections

AVPEC models come with factory installed electronic
expansion valve (EEV) pre-installed on the vapor tube.
1. Remove refrigerant tubing panel or coil (lower) ac-
cess panel.
2. Remove access valve fitting cap and depress the
valve stem in access fitting to release pressure. No
pressure indicates possible leak.
3. Replace the refrigerant tubing panel.
4. Remove the spin closure on both the liquid and suc-
tion tubes using a tubing cutter.
7
Coil slides on
the down ow bracket
FIGURE 9