HANKISON HPR Series User Manual

6
FIELD SERVICE GUIDE
Problems most frequently encountered with refrigerated
dryers are water downstream of the dryer and excessive
pressure drop. Most causes can be identified and remedied
by following this guide
Closed refrigeration systems are potentially
dangerous. Work on the refrigeration system must be done
only by a competent refrigeration mechanic. Do not release
fluorocarbon
refrigerants to the atmosphere. All refrigerants must be
recovered per EPA requirements. Do not smoke when a
refrigeration leak is suspected. Burning materials may
decompose refrigerants, forming a toxic gas or acids that
may cause serious injury and property damage. Before
dismantling any part of the dryer or compressed air system,
completely vent the internal pressure to the atmosphere.
PROBLEM
WATER DOWNSTREAM OF DRYER
SYMPTOM:
No discharge from separator drain
trap
SYMPTOM:
Dryer inlet air temperature too
high
SYMPTOM:
Refrigerant compressor stopped
HIGH PRESSURE DROP
SYMPTOM:
Low outlet pressure
POSSIBLE CAUSE
Failure of drain trap
Aftercooler malfunction
Leak in refrigerant system
Compressor overheated
Compressor burned out
Inlet air temperature too high
Excessive airflow
Condenser fouled or clogged
High ambient temperature
Improper adjustment of
Expansion Valve
Dryer undersized (may cause water
downstream of dryer)
Blocked separator
Dryer icing up
REMEDY
Dismantle & clean strainer, repair or
replace solenoid valve or float
mechanism.
Check aftercooler discharge
temperature and reduce to dryer
design condition (122°F max)
Consult local distributor
Turn dryer off, wait 30 minutes;
turn dryer on. (Motor thermostat
self-starting)
Consult local distributor
Reduce aftercooler discharge
temperature to design conditions
Check airflow & system capacity.
Reduce airflow or resize and replace
system
Clean or replace condenser
Ventilate area
Consult Factory
Check airflow and dryer capacity.
Reduce airflow or resize and replace
dryer
Dismantle & clean or replace
separator (10 scfm model only)
Consult local distributor
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HANKISON HPR Series Specifications

General

Brand	HANKISON
Model	HPR Series
Category	Dehumidifier
Language	English