Precautions For Indoor Unit And Hbc Controller - Mitsubishi Electric HYBRID CITY MULTI PURY-M200-300YNW-A Data Book

1. Installation information

1-2. Precautions for Indoor unit and HBC controller

1-2-1. Operating environment
If the refrigerant leaks, the oxygen level may drop to harmful levels. If the air conditioner is installed in a small room,
measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant
should leak.
If the units operate in the cooling mode at the humidity above 80%, condensation may collect and drip from the indoor
units.
1-2-2. Unit characteristics
The return air temperature display on the remote controller may differ from the ones on the other thermometers.
The clock on the remote controller may be displayed with a time lag of approximately one minute every month.
The temperature using a built-in temperature sensor on the remote controller may differ from the actual room tempera-
ture due to the effect of the wall temperature.
Use a built-in thermostat on the remote controller or a separately-sold thermostat when indoor units installed on or in
the ceiling operate the automatic cooling/heating switchover.
The room temperature may rise drastically due to Thermo OFF in the places where the air conditioning load is large
such as computer rooms.
Be sure to use a regular filter. If an irregular filter is installed, the unit may not operate properly, and the operation noise
may increase.
The room temperature may rise over the preset temperature in the environment where the heating air conditioning load
is small.
1-2-3. Unit installation
The insulation for low pressure pipe between the HBC controller and outdoor unit shall be at least 20 mm thick. If the
unit is installed on the top floor or in a high-temperature, high-humidity environment, thicker insulation may be necessary.
Do not have any branching points on the downstream of the refrigerant pipe header.
When a field-supplied external thermistor is installed or when a device for the demand control is used, abnormal stop of
the unit or damage of the electromagnetic contactor may occur. Consult your local distributor for details.
MEES17K105
INSTALLATION INFORMATION
4