Page 2 of 58
SK2019 FMCD-V-ECM-001
Table of Contents
A. Technical Data ................................................................................................................................................................... 5
A.1. General Description ............................................................................................................................................................ 5
A.2. General Specifications ........................................................................................................................................................ 6
A.2.1. 2-pipe Systems ........................................................................................................................................................... 6
A.3. Coil Data ............................................................................................................................................................................. 8
A.4. Dimensional Drawings ........................................................................................................................................................ 8
A.5. Sound power data ............................................................................................................................................................ 10
A.6. Valve Information (Optional)............................................................................................................................................ 14
A.7. Drain Pump and Installation Fixture (Optional) ............................................................................................................... 16
B. Installation ....................................................................................................................................................................... 17
B.1. Safety Precautions ............................................................................................................................................................ 17
B.2. Before Installation ............................................................................................................................................................ 18
B.3. Mounting Plate Dimensions ............................................................................................................................................. 19
B.4. Mounting Plate Installation .............................................................................................................................................. 20
B.5. Condensate Drainage Hole Drilling................................................................................................................................... 20
B.6. Hydronic Unit Installation ................................................................................................................................................. 21
B.7. Drainage Piping Works ..................................................................................................................................................... 21
B.8. Pipe Connections with Valve ............................................................................................................................................. 22
C. Maintenance .................................................................................................................................................................... 23
C.1. Opening and Closing of Lift-Up Grille Cover ..................................................................................................................... 23
C.2. Front Cover Assembly Removal ........................................................................................................................................ 23
C.3. Air Vent and Water Purge Valves ..................................................................................................................................... 23
C.4. Wiring Connections ........................................................................................................................................................... 23
D. Control Specifications: Complete Function PCB – TOTAL TYPE CONTROL ......................................................................... 24
D.1. I/O Port Definitions........................................................................................................................................................... 24
D.2. Wiring Diagrams .............................................................................................................................................................. 25
D.2.1. 2-pipe system ........................................................................................................................................................... 25
D.3. Configuration Settings ...................................................................................................................................................... 26
D.4. Control Logics For 2-Pipe System ..................................................................................................................................... 28
D.4.1. With Thermoelectric Valve Configuration ................................................................................................................ 28
D.4.2. Without Thermoelectric Valve Configuration .......................................................................................................... 31
D.5. Control Logics For 4-Pipe System ..................................................................................................................................... 33
D.6. Sleep Mode ....................................................................................................................................................................... 35
D.7. Auto Fan Speed ................................................................................................................................................................ 35
D.8. Louver ............................................................................................................................................................................... 35
D.9. Buzzer ............................................................................................................................................................................... 35
D.10. Auto Restart ................................................................................................................................................................... 36
D.11. On/Off Switch ................................................................................................................................................................. 36
D.12. Electric Heater Safety Switch .......................................................................................................................................... 36
D.13. Low Temperature Protection of Indoor Coil in Winter ................................................................................................... 36
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