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PN 20009722 REV F, [08/01/2020]
CAW INFRARED CONTROL SYSTEM - OPERATION
Handheld Remote Operation
•
When power is first applied to control or after power
outage, there is three (3) minute delay before cooling or
heating begins. Protects unit from short cycling due to
loss of power.
•
Configure controller with remote DIP switch 4 to NO
to operate using IR hand held remote controller. DIP
switch YES to operate using wall mounted remote
thermostat. See Table 3, Page 24.
• Point IR hand held remote toward cassette’s infrared
receiver window when entering commands. Cassette
responds with beep indicating it has successfully received
transmitted information. See Figure 36, Page 24.
Synchronization
IR hand held remote and cassette’s main control board
mode synchronization are not in same mode may happen
if commands are entered into remote when not pointed at
cassette.
To re-synchronize:
• Enter any command into IR hand held remote while
pointing at cassette’s infrared receiver window.
• Alternatively, hold POWER/SEND button two seconds. All
optional IR hand held remote’s settings are transmitted
to cassette. Cassette responds with beep, indicating it
received transmitted information.
Temperature Indication
• Room temperature displayed on IR hand held remote is
temperature at IR hand held remote.
• Microprocessor control located in cassette does not read
IR hand held remote’s temperature — it uses sensor
located in return air of cassette.
• Warming or cooling of IR hand held remote alone does
not effect operation of cassette. Cassette reacts to its
local temperature sensing element and setpoint selected
and transmitted by IR hand held remote.
Transmission Limits
• Transmission distance of IR hand held remote is
approximately 25-30 feet when perpendicular to face of
cassette.
• Reception distance varies with angle of transmission if
not perpendicular.
• Reception distance may also vary depending on room
lighting.
Hibernate Mode
• When IR hand held remote enters hibernate mode,
display goes dark if no activity on IR hand held remote
for ten minutes.
• Pressing any button awakens IR hand held remote while
in hibernate mode. IR hand held remote returns to
mode it was in prior to entering hibernate mode.
Power
Pressing POWER button momentarily switches unit either
on or off.
1.
OFF mode, LCD displays time of day and day of week.
2.
ON mode, LCD displays room temperature, mode of
operation cooling, heating, auto (auto changeover), dry
or Fan mode.
3.
ON mode, setpoint temperature displays momentarily
with push of any button except POWER button.
4.
IR hand held remote transmits all infrared hand held
controller information to cassette when POWER is held
down for two (2) seconds.
Mode
• Heating, auto changeover (auto) or dry modes do not
display if heat source is set to OFF in configuration
mode.
• MODE button allows selection of mode of operation —
cooling, heating, auto changeover (ACO), dry or fan
mode.
• Fan mode either HIGH or LOW appears on LCD.
Fan Operation
Unit utilizes two-speed motor with three operational fan
modes — high, low, and auto. All modes are continuous fan
operation.
FAN button allows selection of desired fan speeds in all
modes except Dry mode.
Dry mode, fan operates constantly at low
speed. LCD indicates fan speed selection.
High and low are constant fan settings. Fan operates
continuously, regardless of setpoint or room temperatures.
Auto fan mode is for auto ramping of fan speeds.
1.
Auto fan mode can only be selected if unit is in heating,
cooling or auto changeover modes.
2.
Auto fan mode, speed is determined by microprocessor.
a.
Speed adjustment is made according to room and
setpoint temperatures.
B.
Fan switches to High speed when room temperature
deviates by more than two degrees from setpoint.
C.
Fan switches to Low speed if deviation is one degree
or less.
Louver Operation — CAW18-36
Louver can be set to oscillate during fan operation or open
to fixed setting.
“Lou” is displayed for two seconds along with “ON or “OFF”
to indicate louver setting has been changed when LOUVER
is pressed.
