7
Refer to Figure 7 and 8 for the location of the components
referenced in the following steps.
1. Before flipping the air handler, remove blower access
panel and coil access panel. The coil access panel and
tubing panel may remain screwed together during this
procedure. Remove and retain the seven (7) screws
securing the coil access panel to the cabinet and the
six (6) screws securing the blower access panel to the
cabinet.
2. Before removing the coil remove the wire ties holding the
sensor wire harness to the center support. Remove the
insulation covering the wire connectors and disconnect
the wires. Do not cut or damage the insulation covering
the junction connectors since it will be required to secure
the wires once the change is complete. See Figures 2-1
and 2-2 for wire tie location.
NOTE: DO NOT USE MANIFOLDS OR FLOWRATOR
TO PULL THE COIL ASSEMBLY OUT. FAILURE TO
DO SO MAY RESULT IN BRAZE JOINT DAMAGE
AND LEAKS.
3. Slide the coil assembly out using the bottom drain pan
to pull the assembly from the cabinet.
4. For flipping the coil, drain pan extension must be re
-
moved for all models except DV61PECD14**. Center
support should not be removed while removing the drain
pan extension. Side drain pan and horizontal drip shield
can be removed for downflow application. The side drain
pan and horizontal drip shield cannot be removed for
horizontal right.
5. Using the bottom drain pan to hold the coil assembly,
slide the coil assembly back into the cabinet on the
downflow brackets as shown in Figure 9.
6. Reconnect the sensor wires and replace the insulation
securing it with wire ties on both sides as shown in Figure
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 mainte-
nance of the air handling unit.
Figure 9
COIL INSTALLATION FOR DOWNFLOW
IMPORTANT NOTE:
Ensure coil slides on the rails along the groove provided
on the drain pan side walls. Failure to do so will result in
improper condensate drainage.
Coil slides on
the downflow bracket
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 2% minimum
silver content.
7.1 Tubing Size
For the correct tubing size, refer to the outdoor AIR
CONDITIONING OR HEAT PUMP INSTALLATION &
SERVICE REFERENCE.
7.2 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.
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
.
CAUTION
