OC193-4
(2) Group Control by a Single Remote Controller
In an application requiring a number of air conditioner units in a large area on a single floor, up to 50 units can be centrally
controlled using a single remote controller. The remote controller controls Power ON-OFF, set temperature, fan speed,
swing louver ON-OFF timer, and auto vane position of all units of the group. Obviously, if all the units started simultane-
ously, the surge current would be unacceptably high. Therefore the microprocessor board of each indoor unit has a 8-tog-
gle DIP switch that can be programmed to give sequential starting with up to 50 seconds delay. When the switch of the
remote controller is pressed, master unit comes on immediately, followed by the other units in the programmed order.
Thereafter the thermistor in each indoor unit controls compressor operation to keep the room at the set temperature.
The remote controller is connected to the indoor units by non-polar 2-wire cable. Total cable length can be as much as 550
yards. This system can be applied to the air conditioning of large offices or conference rooms, supermarkets, etc.
(3) Control Using Two Remote Controllers
Two remote controllers can be used to control either one unit or several units in group control. This makes it possible to
control units with ease either from a distance or at close range. Units operate according to the latest commands from either
remote controller.
(4) Both Remote ON/OFF Control and Individual Control
All units can be turned on and off simultaneously using the remote ON/OFF switch, and also individual units can be con-
trolled from the remote controllers.
This system is well suited to buildings having a large number of rooms. In offices, for example, all units can be started
together to cool or heat the premises before workers arrive, operated as necessary by individual remote controllers dur-
ing the day, and stopped together at the end of business.
3. REDI-CHARGED REFRIGERANT SYSTEM
When refrigerant tubing is 100ft or less, it is unnecessary to charge additional refrigerant. This can contribute to enhance
installation quality and reduce installation time.
4. MAXIMUM COMFORT AIR CONDITIONING
(1) Auto-Angle Airflow for Comfortable Air Conditioning
PCH units offer a choice of airflow outlets, a horizontal one and a downward-pointing one, and they incorporate auto-angle
vanes which can be used independently by means of microprocessor control. This has led to the development of a new
auto-angle airflow function and has made it possible to obtain the most comfortable forms of heating and cooling to suit
the requirements of all kinds of rooms.
When operating in the heating mode the vanes automatically set the downward direction of hot air at an angle of 70
-
.
When cooling, they are set at 0
-
so that 100% horizontal airflow is achieved. Altogether, four* directions of airflow can be
selected by remote control: 100% downward airflow, 80% downward airflow (plus 20% horizontal airflow), 60% downward
airflow (plus 40% horizontal airflow) and 100% horizontal airflow.
* When the fan speed is on low during cooling, only three types are available: 100% and 80% downward airflow and 100%
horizontal airflow.
(2) Swing Flow Louvers
The swing Flow Louvers automatically change the air flow direction for desir-
able air distribution.
(3) Fresh-Air Intake
The PCH-EK series also has fresh air intake, providing more comfortable,
healthful air conditioning through better ventilation. The rear panel has a knock-
out for the intake of fresh air.
5. STABLE COOLING EVEN AT OUTDOOR TEMPERATURES AS LOW AS 23
-
F MAKES
YEAR-ROUND AIR-CONDITIONING POSSIBLE
The microprocessor automatically adjusts fan speed in accordance with outdoor temperature to maintain the coolant at an
even condensing temperature. The result is smooth, efficient cooling even when temperatures outdoors drop as low as 23
-
F.
This makes the unit ideal for a wide range of specialized cooling needs, such as rooms with many office machines or com-
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