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START-UP
The compressor crankcase heater must be on for 24 hours be-
fore start-up. After the heater has been on for 24 hours, the unit
can be started. If no time elapsed since the preliminary charge
step was completed, it is unnecessary to wait the 24-hour peri-
od.
Preliminary Checks
1.
Check that electric power supply agrees with unit name-
plate data.
2.
Verify that the compressor crankcase heater is securely in
place.
3.
Check that the compressor crankcase heater has been on at
least 24 hours.
4.
Recheck for leaks using the procedure outlined in the
Pre-Start-Up section, Leak Test and Dehydration. If any
leaks are detected, repair as required. Evacuate and dehy-
drate as described in the Leak Test and Dehydration section.
5.
Ensure that the preliminary charge has been added as
described in the Pre-Start-Up section, Preliminary Charge.
6.
All internal wiring connections must be tight, and all barri-
ers and covers must be in place.
NOTE: The 569J units are factory charged with the required
amount of oil. If recharging is required, use Emkarate
RL 32-3MAF for the 569J units.
COMPRESSOR ROTATION
On 3-phase units with scroll compressors, it is important to be
certain that the compressor is rotating in the proper direction.
569J units are equipped with a Comfort Alert Diagnostic Mod-
ule (CADM). Alert Code 7 indicates reverse power phasing.
To correct phase order:
1.
Turn off power to the unit, tag disconnect.
2.
Reverse any two of the unit power leads.
3.
Reapply power to the compressor, verify correct pressures.
To verify the compressor is rotating in the proper direction:
1.
Connect service gauges to the suction and liquid pressure
fittings.
2.
Energize the compressor.
3.
The suction pressure should drop and the liquid pressure
should rise, as is normal on any start-up.
COMPRESSOR OVERLOAD
This overload interrupts power to the compressor when either
the current or internal motor winding temperature becomes
excessive, and automatically resets when the internal tempera-
ture drops to a safe level. This overload may require up to
60 minutes (or longer) to reset. If the internal overload is sus-
pected of being open, disconnect the electrical power to the unit
and check the circuit through the overload with an ohmmeter or
continuity tester.
ADVANCED SCROLL TEMPERATURE PROTECTION
(ASTP)
A label located above the terminal box identifies Copeland™
Scroll compressor models that contain this technology. See
Fig. 21. Advanced Scroll Temperature Protection (ASTP) is a
form of internal discharge temperature protection, that unloads
the scroll compressor when the internal temperature reaches
approximately 149°C (300°F). At this temperature, an internal
bi-metal disk valve opens and causes the scroll elements to
separate, which stops compression. Suction and discharge
pressures balance while the motor continues to run. The longer
the compressor runs unloaded, the longer it must cool before
the bi-metal disk resets. See Fig. 22.
1. Third-party trademarks and logos are the property of their respective
owners.
To manually reset ASTP, the compressor should be stopped
and allowed to cool. If the compressor is not stopped, the mo-
tor will run until the motor protector trips, which occurs up to
90 minutes later. Advanced Scroll Temperature Protection will
reset automatically before the motor protector resets, which
may take up to 2 hours.
Fig. 21 — Advanced Scroll Temperature Protection Label
120
®1
110
100
90
80
70
60
50
40
30
20
10
0
0
10
NOTES:
1 . Various factors, including high humidity, high ambient temperature,
and the presence of a sound blanket will increase cool-down times.
*Times are approximate.
Fig. 22 — Recommended Minimum Cool-Down Time After
Start Unit
Set the space thermostat to a set point above space temperature
so that there is no demand for cooling. Close the 569J discon-
nect switch. Only the crankcase heater will be energized.
Reset the space thermostat below ambient so that a call for
cooling is ensured.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Never charge liquid into the low-pressure side of system.
1
Do not overcharge. During charging or removal of refriger-
ant, be sure indoor-fan system is operating. Ensure both
outdoor fan motors are running; bypass any Motormaster
function.
ADJUST REFRIGERANT CHARGE
Refer to Cooling Charging Charts, Fig. 24-28. For applications
with line lengths greater than 125 ft (38 m), contact Bryant rep-
resentative. Make sure that all condenser fans are operating be-
fore adjusting charge to the charging charts. Vary refrigerant
until the conditions of the chart are met. Note that the charging
charts are different from the type normally used. The charts are
based on charging the units to the correct subcooling for the
various operating conditions. Accurate pressure gauge and
temperature sensing device are required. Connect the pressure
21
20
30
40
50
60
70
Compressor Unloaded Run Time (Minutes)*
Compressor is Stopped
CAUTION
80
90
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