Start Up Cooling Section And Make Adjustments - Bryant 582A Series Installation, Start-Up And Service Instructions Manual

F. Heating Sequence of Operation
See Fig. 15-17 and unit wiring label.
On a call for heating, terminal ''W'' of the thermostat is en-
ergized, starting the induced-draft motor. When the hall-
effect sensor on the induced-draft motor senses that it has
reached the required speed, the burner sequence begins. This
function is performed by the integrated gas control (IGC). The
evaporator-fan motor is energized 45 seconds after flame is
established. When the thermostat is satisfied and ''W'' is deen-
ergized, the burners stop firing and the evaporator-fan motor
shuts off after a 45-second time-off delay.
An LED (light-emitting diode) indicator is provided on the
control board to monitor operation. The control board is lo-
cated by removing the burner access panel. During normal
operation, the LED is continuously on. See Table 8 for error
codes.
Table 8 — LED Indications
ERROR CODE
Normal Operation
Hardware Failure
Fan On/Off Delay Modified
Limit Switch Fault
Flame Sense Fault
Four Consecutive Limit Switch Faults
Ignition Lockout Fault
Induced-Draft Motor Fault
Rollout Switch Fault
Internal Control Fault
NOTES:
1. There is a 3-second pause between error code displays.
2. If more than one error code exists, all applicable error codes will be
displayed in numerical sequence.
3. This chart is on the wiring diagram located inside the burner
access panel.
G. Limit Switches
Normally closed limit switch (LS) completes the control cir-
cuit through the thermostat R circuit. Should the leaving-air
temperature rise above the maximum allowable tempera-
ture, the limit switch opens and the R control circuit ''breaks.''
Any interruption in the R control circuit instantly closes the
gas valve and stops gas flow to the burners and pilot. The
blower motor continues to run until LS resets.
When the air temperature at the limit switch drops to the
low-temperature setting of the limit switch, the switch closes
and completes the R control circuit. The electric-spark igni-
tion system cycles and the unit returns to normal heating
operation.
H. Auxiliary Limit Switch — Rollout
The function of the switch is to close the main gas valve in
the event of flame rollout. The switch is located above the
main burners. When the temperature at the auxiliary switch
reaches the maximum allowable temperature, the R control
circuit trips, closing the gas valve and stopping gas flow to
the burners. The indoor (evaporator) fan motor (IFM) and in-
duced draft motor continue to run until switch is reset.
III. START UP COOLING SECTION AND MAKE
ADJUSTMENTS
A. Checking Cooling Control Operation
Start and check the unit for proper cooling control operation
LED INDICATION
as follows:
On
Off
1 Flash
2 Flashes
3 Flashes
4 Flashes
5 Flashes
6 Flashes
7 Flashes
8 Flashes
IMPORTANT: Three-phase, scroll compressor units (582A048
and 583A030-060) are direction-oriented. These units must
be checked to ensure proper compressor 3-phase power lead
orientation. If not corrected within 5 minutes, the internal
protector will shut off the compressor. The 3-phase power leads
to the unit must be reversed to correct rotation. When turn-
ing backwards, scroll compressors emit elevated noise levels,
and the difference between compressor suction and dis-
charge pressures may be dramatically lower than normal.
—18—
CAUTION: Complete the required procedures given
in the Pre-Start-Up section on page 14 before starting
the unit.
Do not jumper any safety devices when operating the
unit.
Do not operate the compressor when the outdoor tem-
perature is below 40 F (unless accessory low-ambient
kit is installed).
Do not rapid-cycle the compressor. Allow 5 minutes be-
tween ''on'' cycles to prevent compressor damage.
1. Place room thermostat SYSTEM switch in OFF posi-
tion. Observe that blower motor starts when FAN switch
is placed in ON position and shuts down when FAN switch
is placed in AUTO. position.
2. Place SYSTEM switch in COOL position and FAN switch
in AUTO. position. Set cooling control below room tem-
perature. Observe that compressor, condenser fan, and
evaporator blower motors start. Observe that cooling cycle
shuts down when control setting is satisfied. The evapo-
rator fan will continue to run for 30 seconds.
3. When using an auto.-changeover room thermostat, place
both SYSTEM and FAN switches in AUTO. positions.
Observe that unit operates in Heating mode when tem-
perature control is set to ''call for heating'' (above room
temperature) and operates in Cooling mode when tem-
perature control is set to ''call for cooling'' (below room
temperature).
(Text continued on page 22.)