Specifications

CONTROLS — SYSTEMS USING HIGH WALL FAN COILS
619E CONTROL SYSTEM — The 619E unit is equipped with a
microprocessor control which operates the system. This control
is located in the control box of the fan coil unit, with thermistors
located in the fan coil inlet and on the indoor coil. The 619E heat
pump fan coil units also have thermistors located on the outdoor
coil and in the outdoor air inlet. These thermistors monitor sys-
tem operation and control the operating mode. To change set-
tings or modes of operation, use the factory-supplied infrared
wireless remote controller (see above). This controller allows
the fan coil unit to be operated from within the same room with-
out any wire connections to the unit.
The remote controller includes a wall-mounted bracket. To in-
stall the bracket, attach bracket to the wall using factory-
supplied, double-sided tape. Install factory-supplied batteries
into the remote controller and place the controller into the
bracket so that it is ready for use.
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 automatically restored, operation continues in the
same operating mode as when power shut down.
AUTOMATIC OPERATION (AUTO) MODE — If auto mode is
selected, the system automatically switches the operating mode
from heating to cooling, or from cooling to heating depending on
the preset temperature (adjustable ± 35° F).
NOTE: Between the cooling cycle and the heating cycle there
is a neutral zone of approximately 2° F above and 2° F below
the preset temperature when only the fan is operating.
OPERATING FAULT DIAGNOSIS — The system includes an
automatic diagnosis feature which is activated under difficult or
unacceptable operating conditions. If such conditions occur, the
system stops automatically, the operating fault signal appears
(green ‘‘UNIT ON’’ light on the front of the fan coil unit flashes),
and an analysis of the system operating conditions is initiated.
The system is restarted automatically as soon as normal con-
ditions have been restored, or after 5 tries it will remain off. If the
system does not start again, the green ‘‘UNIT ON’’ light flashes
an error code.
CONTROL OPERATING MODES — There are 11 operating
modes (including the off mode) for the unit. Each mode oper-
ates as follows:
• Off Mode — When the unit is in the off mode, all functions
(compressor, outdoor fan, indoor fan, and air sweep) are off,
except the reversing valve, which will stay energized if the unit
was last operated in the cooling mode.
• Air Circulation Mode (Fan Operation Only) — When air circu-
lation mode is selected, the indoor fan operates continuously
at the selected speed (high, medium, low, or auto). If the auto
mode is selected, the indoor fan operates at low speed. The
compressor and outdoor fan are off. The reversing valve will
remain in the last operating mode.
• Cooling Mode — When the cooling mode is selected, the in-
door fan operates continuously at the selected speed if the
speed is high, medium, or low. If the indoor fan is in auto
mode, the fan changes operating speeds depending on the
difference between the room temperature and the set point.
The reversing valve will be on for 619E018,024 units or off for
619E009,012 units. The compressor cannot run for 3 minutes
from the time the system starts up or for 3 minutes from the
time the compressor last operated. When the temperature of
the room is equal to or greater than the selected temperature,
the compressor and outdoor fan will operate until the room
temperature is 2° F below the set point, and then shut off.
When the room temperature is less than the selected tem-
perature, the compressor and outdoor fan remain off.
• Maximum Dehumidification Mode — When the dehumidifica-
tion 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 mode, the fan changes operating
speeds depending on the room temperature. If the room tem-
perature is below the set point, the indoor fan runs at ultra-low
speed, and the compressor could run for up to 4 minutes.
(Ultra-low speed is a control-driven speed [not user config-
urable] used to sample the space when the fan would nor-
mally be off.) The reversing valve will be on for 619E018,024
units or off for 619E009,012 units. The compressor cannot run
for 3 minutes from the time the system starts up or for 3 min-
utes from the time the compressor last operated.
Initial Operation — When the mode is first selected, one of the
following occurs:
1. If the room temperature is above or equal to the selected
temperature, the unit operates for 16 minutes and the com-
pressor and outdoor fan operate. The indoor fan will operate
as in the cooling mode. After 16 minutes of operation (or
when the room reaches 2° F below set point), the unit
switches to normal dehumidification operation.
2. If the room temperature is below the selected temperature,
the unit operates for 8 minutes as follows: The compressor
and outdoor fan operate for 3 minutes. The indoor fan oper-
ates in low speed, and 30 seconds after the compressor
stops, the indoor fan stops. The unit remains off for 1 minute,
and then the indoor fan starts in ultra-low speed for 30 sec-
onds. The unit then switches to normal dehumidification
operation.
Wireless Controller
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