Advantage Sentra SK Series, Instruction Manual

Page: 54 / 70

Temperature Control Units : Sentra with VE Series Instrument
Page: 54
Advantage Engineering, Inc.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
www.AdvantageEngineering.com
on command by the instrument. The electric motor is
protected from excessive amperage by a set of thermal
overload relays, which open when excessive amperage
“heats” the overloads and the relay opens.
D. HEATER CONTACTOR. The standard heater contactor
is a mechanical style contactor. On command from the
instrument, the contactor will close and voltage will be
supplied to the heater (figure 6.2B). The contactor use
should be monitored and the contactor should be replaced
as needed based on duty cycle. Some units are provided
with a solid state contactor rather than the standard
mechanical contactor.
E. PRESSURE SWITCH. The electric panel mounted
pressure switch will close when sufficient pressure is
supplied to the unit (20 psi). A closed pressure switch will
consent the control circuit to the instrument controller to
allow process operations.
F. SENSOR PROBES. The unit uses 1 sensor probe. The
sensor and the “high temperature limit” safety switch”
are housed in the same assembly and mounted in the
heater/pump discharge tank. The “from process” probe is
mounted in the suction tank.
G. POWER CORD. On standard models with 10kW and
16kW heaters and 1 - 3 HP pumps are supplied with a 3
conductor with 1 ground wire sized for the unit and 10’ in
length. Standard models with 24kW and 34kW heaters
are not supplied with a power cord and the customer must provide a 3 conductor with 1
ground wire sized for the unit.
Sensor probe and high temperature
limit
Pressure switch
Pump Motor Controller
Heater Contactor
Transformer