113242-3 17
Compressed
Air Supply
Air Pressure
Normal 80 psi
5.51 bar
Minimum Supply 70 psi
4.82 bar
Maximum Supply 90 psi
6.21 bar
!
Flexible hoses or couplings must be used. The dryer vibrates
slightly when it runs and this will cause the steam coil
connections to crack if they are hard piped to the supply and
return mains.
Shutoff valves for each dryer should be installed in the supply
line, return line, and drip trap return line. This will allow the
dryer to be isolated from the supply main and the return main
if the dryer needs maintenance work.
Install an inverted bucket steam trap and check valve at least
12-inches (30.48 cm) below the steam coil as close to the
coil as possible.
A trap with a capacity of 350 lbs (160 kg) of condensate per
hour at 125 psi (8.61 bar) is needed for each unit.
The supply line and the return line should be insulated. This
will save energy and provide for the safety of the operator and
maintenance personnel.
Water pockets in the supply line, caused by low points, will
provide wet steam to the coil possibly causing steam coil
damage. All horizontal runs of steam supply piping should
be pitched 1/4-inch for every 1 foot (0.30 meters) back towards
the steam supply header causing the condensate in the line
to drain to the header. Install a bypass trap in any low point to
eliminate wet steam.
Important
Flexible hoses/couplings must be used. Coil
failure due to hard plumbing connections will void
the warranty.
Steam Damper Air System Connections
This dryer is manufactured with a pneumatic (piston) damper
system, which requires an external supply of compressed
air. The air connection is made to the steam damper solenoid
valve, which is located at the rear inner top area of the dryer
just in front of the electric service relay box.
Air Requirements
There is no air requirement for dryers with the
Electromechanical Steam Damper Option.
Shaded areas are stated in metric equivalents
Air Connection
Air connection to system – 1/8” N.P.T.
Air Regulation
No air regulator or filtration is provided with the dryer. External
regulation/filtration of 80 psi (5.51 bar) must be provided. It is
suggested that a regulator/filter gauge arrangement be
added to the compressed air line just before the dryer
connection. This is necessary to ensure that correct and
clean air pressure is achieved.
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