Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 531

14.1 GENERAL INFORMATION
14.1.1 Specific features
(1) Less refrigerant charge amount due to use of double phase refrigerant flow system. The total refrigerant charge amount has been
reduced by more than 50%.
(2) The indoor outdoor interconnection signal wiring has been done away with. The microcomputer chip is installed in the indoor unit.
There is no need for the unit to communicate between the outdoor and indoor units so the unit is more resistant to electromagnetic
noise thus the incidence of microcomputer malfunction has been reduced. The compressor in the outdoor unit has its own self
protection function, that reacts according to abnormal high pressure and excessive high temperature.
(3) There are only five power lines with earth line between the outdoor and indoor unit. As no signal wire is used there is no need to
separate the power line from the signal line. One cab tyre cable with 6 wires encased in one sheath is enough for conducting the
wiring work between the outdoor unit and the indoor unit. This contributes to simpler wiring work in the field.
(4) Quiet sound design
(a) Noise reducing effect has been improved significantly with the employment of large silent steam fans which are free from the
wind swishing sound, and the special designing of noise shielding and acoustic suction panel.
(b) Ideal adaptation to the need for quiet sound at conference rooms, offices, etc.
(5) 2 types of optional decorative panel
(a) Optional decorative panel consists of silent panel and a canvas duct panel. [has smaller sizes and is prepared with canvas duct
panel which provides higher drain head.]
(b) Flexibility of installation is increased with 2 type panels.
(6) External static pressure
(a) High external static pressure type (Refer to the specification in clause 2 for the external static pressure.)
(b) Maximum duct length is two times of conventional types. Adaptable to an extra long duct of one spot 20 meters extention.
14.1.2 How to read the model name
Example: FDR 30 8 H EN - SA
Applicable power source ... See the specifications
Heat pump type
Series No.
Nominal capacity
Model name FDR: Cassetteria type unit with
wired remote controller
FDC: Outdoor unit
FDR-H
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