Data subject to change without notice.
Dectron, Inc. March 2012
DECTRON
DSH/DSV/RSH/DBH/RBH Series Dehumidifier Owner’s Manual
250
The following steps are important to the proper function and long life of the unit.
Every Month
Check the Air Filters
• All units have return-air filters. The unit cannot work properly with dirty filters. Units with outdoor-air intakes
must have filters for the outdoor-air intake also. Units with the Economizer, Purge, or EconoPurge options may
have filters before the reheat coil also.
• All dirty filters should be replaced with identical new filters. Filters for outdoor air should be moisture resistant.
• Some units may have airflow options as described in Product Description at the front of this manual. For these
options, refer to filter requirements in the appropriate manual appendix.
• Units with boilers may have an intake-air filter. This filter should be checked and cleaned even in cooling season.
• Do not operate the unit for any amount of time without all filters in place.
Check the compressor(s) oil level, if compressor(s) is equipped with an oil-level sight glass.
Check the lubrication schedules for the blower(s) and motor(s). Lubricate as appropriate.
Check the belt(s) on all blower(s)
• Check for excessive wear. Be sure the belt(s) will operate another month.
•
Check the blower-belt tension and alignment. Belts should not be so loose as to cause increased slip, nor so tight
as to cause excessive shaft-bearing wear. CAUTION:
Never open a sheave to remove, install, or adjust a
belt - use the belt tensioning screw only. Only a qualified technician should change sheave settings.
Check that the temperature and humidity set points are near those specified on the unit nameplate.
Check that the condensate drain pan(s) is clean.
For units with air-cooled air conditioning or DryCooler air conditioning, check for free airflow in the
remote heat exchanger.
• Clean any trash or leaves that might interfere with proper airflow.
• Remove any vegetation or other material that might interfere with airflow at the bottom, sides, or top.
Eliminate chemical fumes
• For indoor units, remove all pool chemicals from the DRY-O-TRON® equipment room.
• For all units, remove all pool chemicals from any space that allows fumes to leak into the natatorium or other
space served by the DRY-O-TRON®.
• For all units, be sure the pool-chemistry agrees with accepted standards and recommendations of this manual.
Every Six Months
Check that there are no bubbles in the sight glass after 10 minutes of compressor operation.
See Startup - Adjustments.
Check the compressor discharge temperature.
For units with gas-fueled boilers, check the heat-transfer fluid properties.
• The color should be fluorescent pink. • The refractive index should be 1.38.
• The pH should be 8.0 to 10.0. • The specific gravity should be 1.08.
• The minimum reserve alkalinity should be 11.0ml.
• In the event of significant differences from the above values, contact Dectron for corrective actions.
Every Twelve Months
Check for blower bearing wear.
Grease the blower bearings.
• Use a high quality grease for HVAC applications.
• Do not over-grease. Add grease until just a little oozes out from the bearing shield.
Check the condensate drain pan for any accumulated residue. Clean as necessary.
Check the air heat transfer coils for dirt and/or trash.
• If the coils are dirty
Δ Clean the coils with a solution of mild soap in warm water. Do not use corrosive cleaning agents.
Δ Increase the frequency of filter replacement. Dirty filters leak dirt onto the coils.
In the event of an extended shutdown, contact Dectron for a copy of Appendix M4 - Storing Units.
Operation Maintenance
See subsequent task descriptions
for safety warnings, etc.
OPERATION
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