RH SERIES—HIGH TEMPERATURE SECTION 2
34
Water in system Inlet and outlet connec-
tions are reversed
Check inlet and outlet
connections
This dryer is designed for air flow in
one direction only.
Inlet and outlet directions are identi-
fied on the dryer and cannot be inter-
changed.
Drain system is clogged
or inoperative
Restore free flow of water
condensate.
Check water evacuation
points and connections.
The attached drain may be timer and
solenoid valve type or pneumatically
assisted.
Timer has to be adjusted in accor-
dance with values listed in the manual
and depending on the amount of
moisture in the air stream.
Solenoid valves includes a strainer
that has to be periodically checked
and cleaned.
Membranes of pneumatically assisted
drains have to be checked or replaced
every 6 months
Bypass system is open Check the valves Important: Bypass piping should be
installed around the dryer so the dryer
can be isolated for service without
shutting down the air supply.
During dryer operation, valves must
be set so all air goes into the system.
Check tightness of the bypass system
Free moisture remains in
pipe lines
Blow out the system Before the dryer is placed inline, blow
out all the moisture from the system
and from the compressed air piping.
Excessive free moisture Check the separator and
drain system ahead of
the dryer
In some systems there may be an
accumulation of free moisture in the
line ahead of the dryer.
If this moisture is pumped into the
dryer intermittently, the water removal
capacity may not be sufficient.
A water separator has to be installed
into the line before the dryer
Excessive compressed
air inlet temperature
Be sure that the dryer is
working well within the
maximum operating con-
ditions
The dryer is designed for working into
calculated maximum conditions.
Should the conditions be exceeded,
the dryer will be overflowed, dew
point will go up and protecting devices
can switch off
PROBLEM POSSIBLE CAUSE REPAIR COMMENTS
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