Advantage SENTRA SRT-1045-300, Инструкция по эксплуатации

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Temperature Control Units : Sentra with T300 Control Instrument
Page: 25
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
a.
Water flow rate through the process is determined by the pressure losses
in the process loop. Generally, higher flow rates result in turbulent flow
achieving maximum temperature control.
b.
If the flow rate exceeds the motor horsepower capacity, the electric motor
will draw excessive amps. This is a result of the process loop’s ability to
flow water at a greater rate than can be provided by the pump. This will
eventually result in tripping the thermal motor overload relay (overload
relays open) and the unit will shut down
c.
The yellow Alert : Motor Overloads icon will display on the instrument.
Press the Tools & Status icon to advance to the Tools & Status screen.
Press Motor Overloads to advance to the informational screen for
required action.
2.
If an excessive flow situation is encountered and the motor overload circuit has
tripped, the operator must manually reset the overload relay before operations
can continue. This is done by opening the electrical panel cover, identifying
the reset lever on the overload relay and pushing the reset lever “in” until the
overloads are reset (evidenced by a “clicking” sound as the overloads reset).
3.
If a motor overload situation persists, the operator must adjust the flow rate to
match the system pressure loss (reduce flow rate) to prevent continual tripping of
the overload relay. This procedure is outlined here:
a.
Open electrical cabinet panel door. The panel cover is hinged and held
open by a support cable. Note that the electrical power is engaged at
this point and caution must be observed while the cabinet panel is
open.
b.
Identify the motor starter block. This block consists of the motor starter
contactor and the overload relay.
c.
Place an amp meter on a single power lead coming from the overload
relay.
d.
Locate the motor name plate on the pump motor housing. The full load
amp rating for the motor is listed on the name plate.
WARNING: To correct phase ... switch power leads at the disconnect switch only.
Instrument showing the Alert Motor Overload Icon.
Alert
Motor Overload Setpoint
200
°F
Setup
Ready
Standby
<< Back Manual Vent
AC Phase
Supply Water Pressure
Pump Overlaod
High Temperature Limit
Cooling Valve
To Process Probe
From Process Probe
Tools and Status
Pump Overload
Pump Overload error indicates
the pump is drawing more
current than it is rated for.
Action : reset the pump
overload in the electrical panel
after following all safety
procedures. Reduce the fluid
flow rate.
<< Back
Motor Starter