Dri-Air Industries HP4-X 400 - 750 Kullanım Kılavuzu - Sayfa 13
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Sayfayı YazdırDRI-AIR
ZONE VALVE
TROUBLESHOOTING
OPERATING MANUAL - HP4-X 400-750 FM DRYERS
Revision 10/8/02
DRI-AIR
INDUSTRIES, INC.
The Dri-Air Zone Valve assembly is designed to provide very
little flow restriction and no leakage. To direct the air flow for
the regeneration cycle and process air, the assembly
incorporates pneumatic Air-Flow Diversion Valves and
Regeneration Air Exhaust Valves controlled by a single
solenoid valve.
TROUBLESHOOTING is easy. The Air-Flow Diversion Valve
assembly located on the top of the dryer cabinet is equipped
with viewing ports to observe the assembly's operation. To
check the valve, note which zone is in regeneration by
observing the REGEN indicator LED on Microprocessor
Control Panel and then checking that the corresponding Air
Diversion Cylinder has actuated, closing the port to the
towers. The Regeneration Air Exhaust Valves located in the
dryer blower compartment, work in tandem with the Air-Flow
Diversion Valves, by opening when the Diversion Valve is
closed, to allow the wet regeneration air to exhaust. To check
these valves, simply check to see if air is exhausting out the
bottom of the dryer. If the valves are not working properly
check the following:
1. Check all air line connections to make sure they are
tight.
2. Check air lines to ensure they are not cracked or
broken.
3. Check incoming air pressure (70 psi min.).
4. Check operation of solenoid valve (See below).
To check operation of solenoid valve, remove front
panel to blower compartment. The valve is located
on the right-hand wall, directly connected to the air
pressure regulator. Located on the top of the valve
is a button, that when depressed will actuate the
valve. With air pressure supplied to the dryer, use
a small screw driver to depress the actuator
button. Observe the action of the Air Diversion
Valves on the top of the dryer. If the Diversion
Valves operate, the solenoid valve is operating
correctly.
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