Remove all pipe plugs from the dryer. Take care to insure that pipe dope, pipe tape,
scale or metal chips are not trapped before the inlet port.
Note: Pre & After Filters Must Be Used On All Units
Install Pre-Filters to “Inlet Air” connection on side of cabinet.
• Wet air inlet should be connected to pre-filter connection on the side of
cabinet.
• In situations where air supply is required 24 hours a day (it is undesirable to
interrupt the airflow), a three valve bypass system is recommended to
bypass the dryer and filters. Use the fewest elbows and taper connections
necessary to keep pressure drop at a minimum.
• Compressed air entering the dryer must be cooled to at least 120ºF.
• Pre-filters, located before the dryer, protect desiccant beds from contamination by oil, entrained water,
pipe scale, etc., thereby extending dryer desiccant life. Locate pre-filters as close to the dryer as possible.
• It is recommended that a mechanical separator be installed immediately preceding the pre-filter to
remove the bulk liquid oil and entrained water.
Install After Filter to “Outlet Air” connection on side of cabinet.
• Dry air outlet should be connected to after-filter connection on the side of cabinet.
• After filters, located after the dryer, help eliminate the possibility of desiccant dusting and carry over
into the air system.
Install Purge Muffler (shipped separately inside of cabinet) to the connection marked “Purge Air” on the side of
the cabinet.
• If Purge Muffler is piped away from dryer - The exhaust muffler must be periodically
checked for any restrictive debris. At high pressure, a clogged muffler could result in high
back pressure and could result in increased dew point, mechanical failure or personal injury.
Installation
Generally, locate your dryer downstream from the air receiver. The only exception would be
on applications with a fluctuating demand. Then the dryer should be located upstream of the
receiver to avoid air surges through the dryer’s desiccant beds.
Provide adequate space around the dryer for servicing.
Four mounting holes are provided in the rear of the cabinet, use the provided bolt hole tem-
plate to secure dryer to the wall. Arrow recommends using (4) #14 round head wood screws,
#14 round of pan head machine screws, #14 pan head self tapping or sheet metal screws or
1/4” round or pan head machine screws for mounting. Mount dryer vertically in an upright
position at desired location.
MOUNTING SPECIFICATIONS AND DRYER LOCATION
PIPING ARRANGEMENT & FILTER INSTALLATION
