Quest Engineering DEH 3000R

1-800-533-7533
Quest DEH 3000R Installation, Operation and Maintenance Instructions
7
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Lock-out the A/C during dehumidier fan operation
ThiswillturnofftheA/Cwheneverthedehumidierfanruns.
1.WiretheYellowthermostatterminaltotheNCterminalontheQuestDEH3000R.Theinstaller
mustsupplythewiringbetweentheQuestdehumidierandthecontrolpanel.Besuretosafelyroutethe
controlwirestopreventdamageduringinstallation.Be
carefulnottocrossthewireswhenconnectingtheQuest
dehumidierandtheremotecontrolpanelordamageto
thetransformermayresult.
2.RuntheYellowwirefromtheA/CunittotheCOM
terminalontheQuestDEH3000R.
Energize the A/C central fan during dehumidier fan
operation
ToautomaticallyruntheA/CFANwhenthedehumidier
fanruns.
1.AttachasecondGreenwiretotheGreenfanwire
terminalonthethermostat.
2.ConnectthenewGreenwiretotheCOMterminalonthe
QuestDEH3000R.
3.RunawirefromtheRedterminalonthethermostatto
theNO(NormallyOpen)terminalontheQuestDEH
3000R.
2.7 Dehumidier lock-OFF or lock-ON:
A/C sensor feature
Toautomaticallyactivateordeactivatethedehumidierwhentheairconditionerruns.
Activate dehumidication when the air-conditioner is running.
A voltmeter is required for the next steps to ensure the correct wiring from
the A/C transformer is used to set up the Lock-in dehumidier function.
1.ThecommonwirefromtheexistingA/Ctransformer(usuallyBlack)
mustbeattachedtothe“COM”sensorterminalbetween“ON-D”
and“OFF-D”ontheDEH3000R.
TIP: The common wire can be identied as the wire from the A/C
transformer that reads 0 volts between it and the Yellow air conditioning call
for cooling wire.The incorrect wire will give a 20 to 28 volt reading.
2.AnotherYellowwiremustbeaddedtothe
thermostatYellowterminalandruntothe“ON-D”
sensorterminalontheQuestDEH3000R.
A/C
Unit
Red
Green
Yellow
A/C
Unit
Red
Green
Yellow
A/C
Unit
Red
Green
Yellow
A/C
Unit
Red
Green
Yellow
ON-D
COM
OFF-D
TO A/C
TO A/C