IM 812 / Page 4 of 28
CAUTION
!
Control Features
Standard Control
Control Pad - Can be unit-mounted or can be remote wall
mounted. Remote mounting requires an accessory 35´ or 50´
low-voltage wire harness and snap-in decorative cover. The
mounting location must be away from cold drafts, discharge
air, outside walls, etc., because the room temperature sensor
is mounted in the control pad (if dip switch #2 of 4, behind the
access cover on front of the control box, is “ON”). A wireless
hand-held remote controller is also available as an accessory,
which allows control of the conditioner from anywhere in the
room.
Heat – Select by pressing the ON/OFF key to “ON” and the
MODE key to “HEAT.” Use the
왕
+
or
왓
-
key to set the desired
room temperature (60-85
O
F).
NOTE: Heat pumps will not operate in reverse cycle un-
less temperature setting is within 2
o
F of room tempera-
ture. Otherwise, unit will heat with electric heaters until
satisfied. The next call for heat will be reverse cycle, pro-
vided the outdoor temperature is above the 30-40
o
F range.
When the outdoor temperature is less than 25
o
F, most of
the heating will be with electric resistance. Between 25
o
F
and 40
o
F, the primary heat will be reverse cycle with occa-
sional resistance heat as required to maintain room tem-
perature. Above 40
o
F, all heating will be by reverse cycle.
Cool – Select by pressing the ON/OFF key to “ON” and the
MODE key to “COOL.” Use the
왕
+
or
왓
-
key to set the desired
room temperature (60-85
O
F).
Fan Only – Select by pressing the ON/OFF key to “ON” and
the MODE key to “FAN”. Press the FAN key to select high or
low speed. In this mode, only the indoor fan will operate and
there will be no heating or cooling.
Cool/Dry
–
Press the ON/OFF key to “ON” and the MODE key
to “COOL”. Press and hold the MODE key for 15 seconds to
activate “COOL/DRY”. Use the
왕
+
or
왓
-
key to set the desired
room temperature. Select this mode when the standard Cool
mode does not provide sufficient dehumidification. The com-
pressor and indoor low fan will cycle together and will operate
for longer periods of time to provide up to 70% more dehu-
midification. As a result, the room temperature differential may
increase slightly.
NOTE: COOL/DRY can not be used with SLEEP.
Fan Speed
–
Select fan speed by pressing the FAN key to
“AUTO”, “HIGH” or “LOW” while the unit is operating in
“HEAT”, or “COOL” mode. “AUTO” gives high fan if unit set-
ting is more than 2
o
F above or below room temperature and
low fan if less than 2
o
F above or below room temperature.
Continuous/Cycle Fan
–
When dip switch #8, located on front
of the control box, behind the access cover, is in the “OFF”
position, the indoor fan will operate continuously. When dip
switch #8 is in the “ON” position, the indoor fan will cycle on
and off with the compressor or heater. In cycle fan, (dip switch
#8 “ON”) the fan will start every 7 minutes to sample the room
temperature. Fan will turn off again after 2 minutes unless heat-
ing or cooling is required.
Room Freeze Protection
–
When dip switch #4 of 4 (located
behind the access cover on front of the control box) is "OFF",
a unit-mounted sensor will be activated to bring on the elec-
tric heater and indoor fan as required to maintain a 40
o
-50
o
F
minimum temperature. This will override “OFF”, remote “OFF”,
“COOL”, “COOL/DRY”, “FAN” and “UNOCCUPIED” modes.
When dip switch #4 of 4 is “ON”, there is no freeze protection.
Also, if using a 24V wall stat, there is no freeze protection (un-
less provided by the wall stat).
IMPORTANT NOTE: When dip switch #4 of 4 is "ON", there
is no freeze protection.
Absence of freeze protection can result in equipment and
property damage. Make certain dip switch #4 of 4 is “OFF”,
if freeze protection is required.
Wired Remote ON/OFF
–
The unit may be turned on by open-
ing, or off by closing, a set of dry contacts located up to 325´
from the unit using a pair of 22 ga. low voltage wires. The 22
ga. wires are connected to the unit using a plug and recep-
tacle connection under the small access cover on the front of
the control box. (A plug with 2 short wires is shipped with the
chassis and plugs into “F. DESK” receptacle) The dry con-
tacts can be a toggle switch at the front desk, a time clock,
etc. When the dry contact is closed, the unit control goes to
memory P1 which is set from the factory at 75
o
F in COOL
mode and high fan. If desired, P1 can be programmed for a
different setting. See instructions under “Motion Sensor & Door
Switch”, page 5. When the dry contact is opened and the unit
restarts, the control will automatically index to a Heat setting
of 68
o
F (if room temperature is below 68
o
F) or a Cool setting of
75
o
F (if the room temperature is above 68
o
F.)
NOTE: If the unit has been turned OFF by remote dry con-
tacts and the room occupant presses the ON/OFF key on
the control pad, the indicator lights will come on and the
control will start beeping but the unit will not heat or cool.
Temperature Limiting
–
The control temperature range as
shipped from the factory is from 60
o
-85
o
F. By using dip switches
#1-#4 of 8 (located behind the access cover on front of the
control box), the range can be changed per the following charts:
NOTE: After the limits have been set, the control display
will still show the full range of 60-85
o
F, however, the unit
will not heat or cool past the limits.
Min. Set Point
SW #1
SW #2
60
o
F
OFF
OFF
64
o
F
ON
OFF
68
o
F
OFF
ON
72
o
F
ON
ON
Max. Set Point
SW #3
SW #4
75
o
F
ON
ON
78
o
F
OFF
ON
82
o
F
ON
OFF
85
o
F
OFF
OFF
