Product data

OPERATING SEQUENCE — HIGH WALL FAN COIL SYSTEMS
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. These ther-
mistors monitor system operation and control the operating
mode. To change settings 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 without any wire connections to the unit.
SYSTEM OPERATION — This system is controlled by a micro-
processor designed to give optimum levels of comfort and op-
erating efficiency. The control is located in the 619E unit. To
operate the unit, the factory-supplied remote controller is
required.
There are 9 operating modes (including the off mode) for the
unit. Each mode operates as follows:
Off Mode — When the unit is in the off mode, all functions (com-
pressor, outdoor fan, indoor fan, and air sweep) are off.
Air Circulation Mode (Fan Operation Only) — When air cir-
culation 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.
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 compres-
sor 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 temperature, the compressor and outdoor fan remain
off.
Maximum Dehumidification Mode — When the dehumidifica-
tion mode is selected, the indoor 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 room temperature. If the room temperature 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 configurable] used to sample
the space when the fan would normally be off.) 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.
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 will operate for 3 minutes. The indoor fan will
operate at 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 at ultra-low speed for 30 sec-
onds. The unit then switches to normal dehumidification
operation.
Normal Operation — One of the following will take place:
1. When the temperature of the room is equal to or greater than
the selected temperature (by not more than 3° F), the unit
will operate for 8 minutes as follows: the compressor and
outdoor fan will operate for 3 minutes. The indoor fan will op-
erate at 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 runs at ultra-low speed for 30 sec-
onds. The normal dehumidification operation is repeated for
the newly sensed room temperature.
2. If the room temperature is equal to or greater than the se-
lected temperature, but not by more than between 4° F and
6° F, the compressor and outdoor fan operate for 4 minutes.
The indoor fan runs at ultra-low speed and will stop 30 sec-
onds after the compressor stops. After 3 minutes, the indoor
fan runs at ultra-low speed for 30 seconds. The normal de-
humidification operation is repeated for the newly sensed
room temperature.
3. When the room temperature is equal to or more than 4° F be-
low the selected temperature, the system operates as
follows: The compressor and outdoor fan operate for 3 min-
utes. The indoor fan operates at ultra-low speed and will stop
30 seconds after the compressor stops. After 4 or 5 minutes,
the indoor fan starts at ultra-low speed for 30 seconds. The
normal dehumidification operation is repeated for the newly
sensed room temperature. If the room temperature is still
4° F below the selected temperature, the compressor, out-
door fan, and indoor fan remain off. After 7
1
⁄ 2 minutes, the in-
door fan operates at ultra-low speed for 30 seconds. The
normal dehumidification operation is repeated for the newly
sensed room temperature.
Wireless Controller
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