Bryant PAYNE 619C - Manual (Page 11)

III. ADJUSTING AIRFLOW
A. Automatic Air Sweep
All units are equipped with an automatic air sweep feature
which automatically directs the airflow louvers up and down
to provide optimum room air circulation. If the auto sweep
feature is not desired, temporarily start the auto sweep us­
ing the remote controller. When the louvers are in the de­
sired position, turn the auto sweep off to hold them in that
position.
IV. OPERATING MODE MEMORY
After the system is turned off or after a power failure, the
system remains in the last operating mode selected. When
the system is turned back on, or when power is automati­
cally restored, operation continues in the same operating mode
as when it shut down.
V. AUTOMATIC OPERATION (AUTO.) MODE
If Auto, mode is selected, the system automatically switches
over the Operating mode from heating to cooling, or from cool­
ing to heating (heat pump system only) depending on the se­
lected temperature.
NOTE:
Betvieen the cooling cycle and the heating cycle there
is a neutral zone of approximately 2° F above and 2° F below
the selected temperature when only the fan is operating. This
neutral zone lasts for a minimum of 10 minutes.
VI. OPERATING FAULT DIAGNOSIS
The system includes an automatic diagnosis feature which is
activated under difficult or unacceptable operating condi­
tions. If such conditions occur, the system stops automati­
cally, the operating fault signal appears on the liquid crystal
display (LCD) of the remote controller, and an analysis of the
system operating conditions is initiated. The system will then
be restarted automatically, as soon as normal conditions have
been restored, or it will remain off. If the system does not
start again, the temperature indicator on the LCD display
alternates between the selected temperature value and an er­
ror code. See separate controls, service, and troubleshooting
guide to troubleshoot the problem.
VII. OPERATION OF MICROPROCESSOR CONTROL
This system is controlled by a microprocessor control de­
signed to give optimum levels of comfort and operating effi­
ciency. The control is located in the 619C unit. To operate
the unit, a remote controller is required. This control may be
wired directly to the unit and mounted on the wall up to
200 ft away from the unit.
See separate owner’s manual for remote controller operation
instructions. More detailed operating sequence and timing are
located in the controls, service, and troubleshooting guide. Both
manuals are available from your distributor.
There are 7 operating modes (including the OFF mode) for
cooling only systems and 11 operating modes (including the
OFF mode) for heat pump systems. The following operation
should be expected in each mode.
• OFF Mode — When the unit is in the OFF mode, all func­
tions (compressor, outdoor fan, indoor fan, electric heat, and
air sweep) are off, except the reversing valve, which will
stay energized if the unit was last operated in the COOL­
ING mode.
• AIR CIRCULATION Mode (Fan Operation Only) - When
AIR CIRCULATION mode is selected, the indoor fan will
operate continuously in the selected speed (high, medium,
low, or auto). If the AUTO, mode is selected, the indoor fan
will operate at high speed. The compressor, outdoor fan,
and electric heat are off The reversing valve will remain
in the last operating mode. The air sweep motor will oper­
ate if selected.
• COOLING Mode — When the COOLING mode is selected,
the indoor fan will operate continuously at the selected speed
if the speed is high, medium, or low. If the indoor fan is in
auto., the fan will change operating speeds depending on
the room temperature. The electric heat will be off and re­
versing valve will be on. The compressor cannot run for 3
minutes from the time the system starts up or for 3 min­
utes from the time it last operated. When the temperature
of the room is 2° F above the selected temperature, the com­
pressor and outdoor fan will operate until the room tem­
perature is equal to the selected temperature. If the room
temperature is 4° F or more above the selected tempera­
ture, the indoor fan will run at high speed. When the room
temperature is between 2° F and 4° F above the selected
temperature, the indoor fan will operate at medium speed.
When the room temperature is 2° F below the selected tem­
perature, the indoor fan will operate at low speed.
When the room temperature is equal to the selected tem­
perature, the compressor and outdoor fan shut off. The in­
door fan, if in auto, operation, operates for one minute af­
ter the compressor shuts off. The fan remains off for 3
minutes, then operates for one minute at low speed. The
indoor fan repeats this process until cooling is again
required.
• MAXIMUM DEHUMIDIFICATION Mode - When the DE­
HUMIDIFICATION mode is selected, the indoor fan will
operate continuously at the selected speed if the speed is
high, medium, or low. If the indoor fan is in auto, opera­
tion, the fan will change operating speeds depending on the
room temperature. The electric heat will be off and revers­
ing valve will be on. The compressor cannot run for 3 min­
utes from the time the system starts up or for 3 minutes
from the time it last operated.
Initial Operation — When the mode is first selected, or if
the indoor fan has been off for more than one minute, the
fan will operate at low speed for 30 seconds. Then, if the
room temperature is above the selected temperature, the
unit will operate for 16 minutes, and the compressor and
outdoor fan will operate. The indoor fan will operate as in
the cooling mode. After 16 minutes of operation, the unit
switches to normal operation.
If the room temperature is below the selected tempera­
ture, the unit will operate for 8 minutes, and the compres­
sor and outdoor fan will operate for 3 minutes. The indoor
fan will operate in low speed, and one minute after the com­
pressor stops the indoor fan stops. After remaining off for
3 minutes, the indoor fan starts in low speed for one minute,
then switches to normal operation.
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