Goulds Pumps 3296M - IOM - Manual (Page 86)

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3296 M Group 6/05
SET UP INSTRUCTIONS
The following are setup instructions which, along with the GTP System instruction manual, will guide you through
the proper setup and operation of the total protection package.
Mounting Location
The Goulds Total Protection System can be located most non-hazardous plant locations where a NEMA 4X
enclosure is appropriate. If a NEMA 7 enclosure is required, the GTP Controller should be mounted in a separate
NEMA 7 enclosure, such as a junction box, that is supplied by the customer. It should be in an area that is
convenient to view, monitor and make adjustments. It should also be mounted near the starter to simplify wiring to
the AC current sense transformer and to the motor starter control circuit. Note that if the starter control transformer
secondary voltage is 120 VAC ro 240 VAC, the GTP System can be wired to it because of its low power
requirement (6 VA).
The current transformer should be mounted in the starter on one of the legs of the power cable between the starter
contacts and the motor. The cable is passed through the current transformer once if AC current range switch is set at
200 or 300. Route the cable through the sense transformer 4 times if the range switch is set at 20 (Total of 5 lines
through transformer window) Refer to current settings for appropriate switch setting.
Wiring
To prevent personal injuries, follow the INSTALLATION WARNING instructions in the GTP system instruction
manual when wiring the GTP controller to the starter, current transformer, thermocouple and auxiliary sensor. Be
sure to route power and sensor wiring in different conduit runs and have each cable properly grounded.
Alarm Level Settings
Follow the ADJUSTMENT PROCEDURE section of the GTP system instruction manual when making adjustments
to the threshold levels for the temperature and current and the delay control adjustments. This instruction covers the
levels required to properly protect the 3296 pump and avoid nuisance trips and alarms as follows:
Current Settings
The GTP System protects the 3296 from dry running, low flow, magnet decoupling and AC motor overload by
monitoring both under current and over current.
Dry Running Protection
To protect against dry running the pump, the current level measurements of the motor uncoupled as well as with
the 3196 pump running at shutoff are needed. Although these values can be calculated from the motor
manufacturer's data for no load motor current and the horsepower from the pump performance curve, it is best
to obtain them during the initial installation and startup of the motor and pump using the GTP system. While
operating the motor uncoupled the current level is obtained directly from the GTP System panel meter, with the
selection switch set at "AC Level." With the pump coupled, started and stabilized, reduce pump flow to zero
and read the current level from the meter. (CAUTION: DO NOT OPERATE THE PUMP AT ZERO
FLOW FOR LONGER THAN 1 MINUTE). Set the under current threshold level to the average of these two
current values (REF GTP system manual) adjustment procedure, Step 2).
Low Flow Protection
To protect against low flow operation of the pump, set the pump to the minimum flow desired (refer to Goulds
Supplemental Engineering Data 725.9A108 for minimum flow for 3296 pumps), read the current level on the
meter and set this current level for the under current threshold (REF GTP system manual adjustment procedure,
Step 2).
Magnetic Decoupling and Motor Overload Protection
Set the over current threshold level to prevent magnetic decoupling of the 3296 pump or over current operation
of the motor, depending on which threshold is lower. Refer to the pump performance curve and note the
maximum drive power listed. Calculate the current draw for the HP on the motor selected to drive the pump.
This is the over current threshold level to set for preventing decoupling. If this level exceeds the full load
current of the motor, use the motor full load current value as the threshold level. This will protect the motor
from over current operation as well as magnetic decoupling of the pump (REF GTP system manual adjustment
procedure, Step 3).