HANKISON HPET Series User Manual

5
Ifwaterispresentdownstreamofthedryer,
alwaysverifythatanycondensatedrainsinstalledupstreamof
thedryeraredrainingproperlybeforeattemptingtoreadjust
the LED setting.
1. Forminimuminletairpressuresthatfallbetweencolumn
values,thesettingforthelowerpressureisrecommended.
(i.e.selectthe300psicolumnvaluesfor324psiinletpres-
surelistedinTable1.)
2. Wherethedryerisconsistentlyoperatingatlessthanmax-
imum capacity, it may be possible to increase the LED set
pointtominimizeairloss.Discretionaryadjustmentstothe
dryer should only be made on a hot, humid day when the
maximumexpectedairloadisowingthroughthedryer.
Failuretodosomaypreventthecondensatefromdraining
completelywhenoperatingunderpeakloadconditions.
Table 1 Timed drain illuminated LED Settings
Inlet Pressure
300 400* 500 600 725
Dryer Model
4 1 1 2 2 2
6 1 1 1 1 2
7.5 1 1 1 1 2
10 1 1 1 1 1
* Recommended and pre-programmed factory settings for each model dryer.
Assumes inlet conditions with 120°F ambient and 10°F air-cooled aftercooler
approach temperature.
Table 2 Timed drain illuminated LED Settings
LED
Illuminated
Minutes
between
Drain Cycles
1
st
1
2
nd
3
3
rd
5
4
th
10
5
th
20
6
th
30
7
th
40
8
th
50
9
th
60
2.0 OPERATION
2.1 Minimum/Maximum Operating Conditions
A. Maximuminletairpressure:725psig(50barg)
B. Minimuminletairpressure:15psig(1.0barg)
C. Maximuminletairtemperature:120°F(49°C)
D. Maximumambienttemperature:
Air-cooledmodels:110°F(43°C)
Water-cooledmodels:130°F(54°C)
E. Minimumambienttemperature:40°F(4°C)
Condensate
Draining
Drain
Push-to-Test
On/Off
Switch
Switch Legend
Power On
Light
Compressor
On Light
Dew Point
Temperature
Indicator
2.2 Start-up
IMPORTANT:Energizedryerdisconnectswitch(providedby
others,seeNEC)24hoursbeforerefrigerationcompressor
is started! Never use the disconnect switch to shut-down the
dryerforaextendedperiodoftime(exceptforrepair).Failure
tofollowtheseinstructionsmayresultinanon-warrantable
compressorfailure.
NOTE: It is recommended that dryer be started 15 minutes
beforecompressedairowbegins.
NOTE:Ifthereisnopowertothecontrolboardforaperiod
oftwoweeksormore,itmayreturntothedefaultmode.
1. ConrmOn/OffSwitchisinthe“Off”position.
2. Checkforproperelectricalvoltage.
3. Energizedryerdisconnectswitch(seeIMPORTANTnote
above)
4. Forwater-cooledmodels:after24hours,begincooling
waterow.
5. ToggleON/OFFswitchtotheONpositiontoenergize
dryer. Green power-on light will illuminate.
6. Slowlypressurizeunitairsidebyopeninginletisolation
valve.Checkforleaks.
7. After15minutes,openoutletisolationvalveslowly.
8. Close air by-pass valve.
2.3 Timer Drain
NOTE: The Timer Drain LED level has been pre-programmed
atthefactoryforyourspecicdryermodel.Programmingis
baseduponaminimumof400psigsaturatedinletairpressure
andmaximumenergyefciency.Thedrainopentimeisxed
atonesecondandasmallamountofairwillbeexhaustedwith
eachcycle.Generally,noadjustmenttothetimerisrequired.

HANKISON HPET Series Specifications

General

Brand	HANKISON
Model	HPET Series
Category	Dehumidifier
Language	English