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Room Freeze Protection Function (RFP)
Room Freeze Protection function (RFP) is used in spaces that are unoccupied during the
winter, for the purpose of protecting any equipment or appliances which may be destroyed as
a result of freezing temperature.
ROOM FREEZE PROTECTION FUNCTION (RFP) OPERATION
When the RFP is selected, the unit will operate the fan at high speed for proper room
temperature monitoring. When the sensor detects that the room temperature has
dropped below 46 °F / 8 °C, the compressor/heat pump operation begins. When the room
temperature reaches 50 °F / 10 °C, the unit shuts off, then will repeat continuously if the
temperature drops below 46 °F / 8 °C again.
<Disclaimer>
This function may not be performed if the unit is not energized, or under a certain condition
that unit is unable to operate such as in protection mode. Please consult with the HVAC
installers or professional for details.
The Room Freeze Protection function (RFP) cannot be used unless the unit is energized and
set into the RFP mode. In the advent of a power failure this mode will not function. During the
RFP mode, POWERFUL OPERATION, QUIET OPERATION and FAN SPEED selection are
all disabled. Please consult with you HVAC installer or professional for more details.
Operating conditions
Use this air conditioner in the temperature range indicated in the table.
Temperature (°F/°C)
Max.
COOL
Max.
HEAT
DBT: Dry bulb temperature, WBT: Wet bulb temperature
Power Supply
Models Number
CS-XE18WKUAW / CU-XE18WKUA
CS-XE24WKUAW / CU-XE24WKUA
ACXF55-27201_FC1219-1.indb 9
n I
DBT
89.6/32
Min.
60.8/16
86.0/30
Min.
60.8/16
Time Delay Circuit Breaker
d
o
r o
WBT
73.4/23
114.8/46
51.8/11
-/-
75.2/24
-/-
25 Amps
30 Amps
O
u
d t
o
r o
DBT
WBT
78.8/26
0/-17.8
-/-
64.4/18
-15/-26
-16/-26.7
Rated Volts
208/230V
11/21/2019 3:03:56 PM
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