BAC 3358C User Manual

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33
Operation Considerations
for Accessories
Vibration Cutout Switch (VCOS)
Mechanical VCOS
Electronic VCOS
Stand Alone BAC Heater
Control Panel
Operation
Stand Alone BAC Heater Control Panel (Optional)
Theheatercontrolsystemconsistsofaheatercontrolpanelandacombination
temperature/waterlevelsensor.Thestainlesssteelsensorprobewith1/2”NPTmounting
ttinghasanon/offrelayoutputthatde-energizestheheaterswheneverthebasinwater
temperatureisabove45°F(7.2°C),orwheneverthesensorprobeisnotfullysubmersed.
Thecontrolpanelenclosureissuitableforoutdooruse.
Thecontrolsystemutilizesacombinationtemperature/lowwaterlevelcontrolsensor,
whichispoweredbyatransformerinthecontrolpanel.Whenthesensorprovidesasignal
tothecontrolpanel,thepanelsendsacontrolvoltagetothemagneticcontactors.When
energized,themagneticcontactorssupplylinevoltagetotheheaters.Annuallyinspectthe
heatercontrolsystempriortotheriskofreachingfreezingoperatingconditions.
Operation
Ensurethattheelementiscompletelysubmergedbeforeenergizingthemaindisconnect.
Thecombinationtemperature/lowlevelcontrolispresettoenergizetheheaterat40°F
(4.5°C),butwillnotenergizeifthewaterlevelistooloworifthewatertemperatureis
above45°F(7.2°C).
Testing the heater when water temperatures are above 45°F (7.2°C):
• Disconnecttheheatercontrolpanelandtagoutthecircuit.
• Removetheheatercontrolpanelcover.
• RemovethesensorwiresconnectedtoterminalsT1andT2onthecombination
temperature/lowlevelcontrolandisolatethem.
• Installthe1.5Kohmtestresistorsuppliedwiththeheatercontrolpanel(inbagon
outsideofcover)acrossterminalsT1andT2.
• Installtheheatercontrolpanelcover.
• Energizethesystemandlistenforthecontactorclosing.
• Afteroperation,de-energizethecircuit,disconnecttheheatercontrolpanel,andtag
outthecircuit.
• Removetheresistorandplaceitbackinthestoragebag.Checkallconnections,
reconnectsensorwiresperthewiringdiagramtoterminalsT1andT2,replacethe
cover,andplacethesystembackinservice.
Operation when the sensor probe is encased in ice:
• Disconnecttheheatercontrolpanelandtagoutthecircuit.
• Removetheheatercontrolpanelcover.
• InstallajumperwireacrossterminalsG1andG2onthecombinationtemperature/low
levelcontrolcircuitboard.
• Installtheheatercontrolpanelcover.
• Energizethesystemandlistenforthecontactorclosing.
• Operatethesystemuntiltheiceismeltedaroundtheprobe.
• Afteroperation,de-energizethecircuit,disconnecttheheatercontrolpanel,andtag
outthecircuit.
• Removethejumper,checkallconnections,replacethecover,andplacethesystem
backinservice.
WARNING: Dangerous voltages
are present in this equipment.
Disconnect the electrical service
of the source and tag the circuit
out before servicing or replacing
components.
ATTENTION: Do not operate the
system unattended or for extended
periods of time during test
mode (resistor across terminals
T1 and T2). Operation in water
temperatures above 45°F (7.2°C)
could damage the unit.
ATTENTION: Do not operate the
system unattended or for extended
periods of time with terminals
G1-G2 jumpered. A low liquid level
condition could occur, and the
system will not shut off which could
result in damage to the heater and
unit.

BAC 3358C Specifications

General

Brand	BAC
Model	3358C
Category	Air Conditioner
Language	English