Factory Installed Features; Smart Start Assist - Bryant Gt 024 Installation Instructions Manual

FACTORY INSTALLED FEATURES

A number of factory installed options are available on the GT
Series of Heat Pumps. The following details the purpose, function
and components of each option.

Smart Start Assist

The Smart Start Assist (SSA) is designed to reduce the in- -rush
draw during single- -phase scroll start- -up. The kit contains two
main parts (shown in Fig. 20), the mounting plate and the SSA
component. The kit is installed on top of the unit's electrical box.
The SSA reduces compressor starting currents, limiting the peak
energy demand. SSA has a dedicated algorithm and built- -in
current limit settings specifically for scroll compressor starting.
The designed soft start algorithm slowly ramps the in- -rush current
which results in the elimination of light flickering, reduction in
voltage disturbances and increased compressor lifetime. The SSA
can lock out the unit and incorporates its own 5 min. time delay,
Refer to Fig. 21, Mode of Operation. This 5 minute anti- -cycle
delay that could possibly hold unit off even if the UPM test switch
is activated in attempt to override the UPM 5 min delay.
De- -energizing the SSA is the only way to override its built in time
delay (refer to unit wiring diagram).
1. The Smart Start Assist has 2 indication LEDs on board. The green LED
indicates the status fo the on-board power supply while the red LED indi-
cates an alarm condition or the recovery time between starts
2. Once the mains voltage is present, the green LED will be fully ON. In case
the mains voltage is less than the stated pickup voltage alarm value, the
green LED will be flashing. In case the mains voltage is higher than the
stated pickup voltage and the green LED is flashing, this may indicate that
the on-board power supply is faulty. (Power Supply Alarm)
3. Upon closing K1, the Smart Start Assist will start ramping for duration of
<1 second provided that the minimum time from stop to start is respect-
ed. When opening the K1, the Smart Start Assist will stop without any
ramp down.
4. In case of an under-voltage, the Smart Start Assist will shut down and the
red LED will flash 2 times as long as the under-voltage is present. Once
the mains voltage is restored, the red LED will continue flashing for 5 min-
utes (6 minutes for HP versions). Following these 5 minutes, the Smart
Start Assist will start ramping function in the case k1 is closed. The device
can be reset at any time by removing power on L1-N connection. When
the power is reapplied, the soft starter will start ramping up as soon as K1
is closed provided that the minimum time between starts and the mini-
mum time from stop to start are respected.
5. If an over--- current (>80A for 1 second) is sensed, the Smart Start Assist
will shut down and the red LED will flash 3 times indicating an over--- cur-
rent situation. This continues for 5 minutes. In the case that the over--- cur-
rent is still present at the second attempt, user intervention is required to
meet the controller by cycling power for the device to operate again as
this implies that there are problems in the system.
Mounting Plate
1
1
- Applicable to HP versions only
Manual resets may be necessary if consecutive flash codes:
2 - - Over current
4 - - Relay Protection
5 - - Incomplete Ramp
Fig. 21 - - Mode of Operation
18
Fig. 20 - - Smart Start Assist
6. A detection circuitry provides protection in case of a faulty starting capaci-
tor EMR. In such a situation, the red LED will flash 4 times for 5 minutes.
Smart Start Assist will check the status of the starting capacitor EMR be-
fore attempting a ramping function (in the case K1 is closed). If, at the
second attempt, the starting capacitor EMR is found to be faulty, user in-
tervention is required to reset the controller by cycle power for the device.
7. In the case of incomplete ramping of the soft starter, the red LED will flash
5 times. The flashing will be indicated by the red LED for 5 minutes. If,
after the second attempt, there is another incomplete ramp alarm, user
intervention is required to reset the controller.
8. During recovery from under--- voltage, over--- current and incomplete ramp
alarms, the red LED will flash twice the normal flashing frequency using
the same number of flashes. The figure shows the flashing in case of a
recovery from an under--- voltage alarm.
9. During the recovery time between starts, the Smart Start Assist will be
continuously ON until the necessary recovery time elapses
10. If supply on Smart Start Assist is removed before the recovery period has
elapsed, when supply is restored, the delay will continue until the remain-
ing recovery time from the last start/stop (before supply removal) is over.
Following this, another start may be attempted. If supply is removed dur-
ing alarm recovery (red LED flashing), when supply is restored, the alarm
will be rest and the Smart Start Assist will only wait for the respective de-
lays between starts and/or stop to start to elapse before attempting an-
other start (assuming K1 is closed).
Optional for
remote alarm
Smart Start
Assist
A150464
A14196 / A14199
1