Dettson COND-09-01, Installation Instructions And Homeowner'S Manual

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6.6- INSTALLATION DRAWING
Figure 19: Installation schematic and clearances
6.7- INSTALLATION OF INDOOR COOLING COIL
Check coil for shipping damage and verify the contents of the box
containing the evaporator coil. If you should find damage, immediately
contact the last carrier. Coils are shipped with a 10 psi dry air holding
charge. Puncture rubber plug on suction line to release charge before
removing plugs. The absence of pressure does not verify a leak. Check
the coil for leaks before installing or returning it to your wholesaler.
Position the coil on the outlet of the furnace using sheet metal screws.
Drain pans are made of a polymer that can withstand temperatures up
to 232.22°C (450°F). Maintain a minimum of 3” clearance over the heat
exchanger. Coil should be level, or pitched slightly toward the drain
connection. Airflow face velocity above 350 ft/min is not recommended
for downflow or counterflow applications due to potential water blow-off.
6.7.1- Multiposition coil
Multi-Position A-Coils come factory installed with a vertical and
horizontal drain pans and can be configured for upflow, downflow,
horizontal blow-through or horizontal pull-through installations. In the
center opening of vertical drain pan, a metal Inlet Air Restrictor is factory
installed and is required for horizontal applications. It may be removed
for vertical applications. Airflow face velocity above 350 ft/min is not
recommended for downflow or counterflow applications due to potential
water blow-off.
For horizontal configurations, install splashguard (included) onto the coil
outlet, and extend suction line insulation into the coil cabinet by 2” to
prevent moisture from dripping onto the insulation (the rubber grommet
may need to be moved). Splashguard installation is not required for
vertical configurations. Bottom flange of guard should rest on pan and
sides screwed to the duct flanges. See Figure 21 and Figure 22 for
splashguard instructions.
In downflow and counter flow configurations, aluminum foil tape must be
applied to seal the top edge of the insulation to the cabinet. This tape
will prevent the possibility of the insulation delaminating and blocking
airflow. In horizontal pull-through and counter flow configurations, a
minimum 12” transition is required in front of the coil as shown in Figure
20. This is required to ensure proper airflow distribution and to reduce
pressure drop.
Top
20 in
50 cm
Air outlet side
24 in
61 cm
Air inlet side
12 in
30 cm
Side
20 in
50 cm
Side
12 in
30cm