20 General information
PTAC
6RWU0-06A
Outdoor Air Temperature Switchover
For Heat pump models during the heating mode, if outdoor temp below 33℉(0.6 ℃), the Comp. is OFF and Heating Mode
is operated by Heater. If outdoor temp reaches 38 ℉(3.3 ℃) Comp. and Heater on/off controlling based on the indoor temp.
However, during normal Heating mode restoration, if in the state of ON, the Heater will continue to operate until desired
temp + 0.5 ℉ and above is reached before being turned OFF. If the Heater is at off state, it remained OFF until Comp. on
condition (desired temp -1.5 ℉ and below) is reached.
Temperature Limits
The unit is programmed to provide both heating and cooling temperature limits by dip switches on the control panel. The
limits are from 54 °F ~ 86 °F (12.2 °C ~ 30 °C). These temperature limits help to prevent overheating and overcooling there-
by reducing the energy costs.
Condensate Drain Valve
The most widely used method of disposing of heat pump condensate is with a temperature-activated drain valve. This is a
device mounted in the base pan of a heat pump unit with a bellows that expands on temperature rise and contracts with
temperature drop. A shaft with a rubber plug on the end is connected to the bellows. When the outdoor temperature remains
above a certain temperature, the bellows is expanded and the plug fits tightly into a hole in the bottom, or base pan, of the
unit. When the plug is blocking the hole, as it should be during cooling operation, the condensate water is contained in the
base pan. At temperatures when heating is required, the bellows contracts, the rubber plug is retracted from the hole and
the heat pump condensate water is allowed to drain into the wall case. The valve is fully open at approximately 45 °F.
Quick Heater Recovery
The unit is designed to operate the electric heater so as to warm the room to the desired temperature set point as soon as the Heat
Pump cycle operates. This feature has an advantage of reducing the time to reach the desired temperature for better comfort.
Reverse Cycle Defrosting – PTHP Only
This feature enables the unit to activate the reverse cycle defrost so as to prevent the formation of ice on the outdoor unit,
which is exposed to cold environment. Formation of ice reduces the airflow through the coil and hence the efficiency of the
air conditioning unit. The LG PTHP employs an active reverse cycle defrost function to melt the ice off the outdoor coil for
ensuring room comfort conditions and savings from extended operation.
High Temperature Heat Pump Operation Protection
When the unit operates at high outdoor temperature conditions during the cooling cycle, this feature switches off the com-
pressor to prevent damage.
Remote Thermostat Control
The PTAC air conditioning unit is designed and built to be operated by a wired or wireless remote mounted thermostat if
desired. The unit has a built-in low voltage power source which can accommodate any of the thermostat choices – manual,
auto changeover or programmable. A remote thermostat can also be added to any unit.
Slinger Technology
The PTAC air conditioner is equipped with an outdoor fan includes outer ring that takes condensate water during cooling
operation from the base pan and dispense it through the condenser, increasing the unit’s efficiency.
Features
