A-Coil
12
If the air inlet of furnace (or blower) is different with the air outlet of coil in size, it
may be necessary to install a field-installed transition between the furnace (or blower)
and the coil to proper airflow distribution (as shown in figure (a).)
Coil should be pitched slightly toward the drain connection. It is recommended to
add silicone caulk between drain pans to prevent water seepage.
4.7 Sealing Ducts
There must be an airtight seal between the bottom of the furnace
and the return air plenum. Use fiberglass sealing strips, caulking, or equivalent sealing
method between the plenum and the air handler cabinet to ensure a tight seal. Return
air must not be drawn from a room where the air handler or any gas-fueled appliance
(i.e., water heater), or carbon monoxide-producing device (i.e., wood fireplace) is
installed.
Ensure that the duct is secured and all joints are properly sealed to the coil cabinet
flanges.
All indoor cabinets
MUST
be taped after installation to seal against any air leaks.
System performance and efficiency will be reduced if air leakage exists.
There must be sealed with sponge or other thermal insulation material where
around the cut-off valves to prevent air leakage or water seepage.
It is necessary to paste sponge seal around the air outlet to prevent leakage.
4.8 Leak Testing, Vacuuming and Charging
Refer to the outdoor unit instruction for leak testing, vacuuming and charging.
Always leak check entire system before charging.
When vacuuming, you need to vacuum the liquid and gas pipe at the same time,
and do not open the cut-off valve of coil until vacuum finished.
Summary of Contents for FLEXX Series
Page 15: ...A Coil 11 a b c d...
