5-4 l Mai nte na nc e
Checking the Dewpoint
It is a good idea to monitor the dewpoint performance of your dryer periodically
with a calibrated portable dewpoint monitor, to ensure it is performing at maxi-
mum capacity. Even if your dryer has a dewpoint readout, comparing it to a
portable instrument periodically will confirm that the dewpoint sensor and readout
is performing properly.
To check dewpoint on models MDCW 15-100:
1 Connect your portable dewpoint meter to the
dewpoint check port of the dryer.
2 Turn on the portable instrument, and ensure
there is positive airflow through the sensor.
3 Monitor the readout and allow ample time for it to stabilize before discon-
necting it. Some dewpoint monitors require a substantial amount of time for
residual moisture to be purged from the sensor.
4 In the event the dewpoint in not satisfactory, refer to the Troubleshooting
section of the manual under Process Dewpoint alarm for DC2.
Alternate Procedure: (for dryers with no dewpoint check port)
1 Stop dryer and allow it to cool.
2 Remove the rear cover of the dryer, and locate the hopper inlet.
3 At the hopper inlet remove the 1/8 inch
NPT pipe plug and connect your portable
dewpoint monitor at this location. A mini-
mum of 3 ft. {91.4 mm} of copper tubing
should be used to make this connection. If
there are existing connections for the dryer’s
dewpoint sensor, locate a 2nd 1/8 inch NPT
port, or connect your dewpoint sensor in series
with the dryer sensor. Do not install a tee to
split the air between the dryer’s sensor and
your portable instrument. This may cause one
of them to be starved for adequate sample air.
✐
NOTE: Portable dewpoint
monitors purchased from
Conair were provided with a
male connector that plugs into
the dewpoint check port. If
you purchased your portable
instrument elsewhere, the
male connector is available
through the Conair parts
department.
NOTE: The dewpoint check
port was not included on early
dryers. It can be added easily.
Contact the Conair parts
department or follow the
alternate procedure.
✐
NPT pipe plug
Replacement dewpoint moni-
tors, male connectors and
dewpoint check ports are
available from Conair.
Contact Conair Parts
(800) 458 1960
From outside of the
United States, call:
(814) 437 6861
✐
NOTE: A minimum of 3 ft.
{91.4 cm} of copper tubing
should be used to make this
connection.
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