88
CIRCUIT DESCRIPTION
12-7) DAMPER CIRCUIT
1) The temperature of R-room is controlled by opening and closing of damper with stepping motor, supplying &
blocking cold air.
2) TA7774P (IC07) operates the damper. TA7774P is the driver IC only for step motor. If the regular signal is
provided to TA7774P from Micom, send combined signal to Quad-Polar step motor to rotate on certain
direction. This makes clockwise or counter clockwise rotation to make the damper open or close.
3) Since the damper always touches the cold air, DC 12V/1W heater is installed, always on to prevent the
malfunction from moisture and is controlled on conditions. (Operation conditions can be changed). Micon #15
pin connected to IC4 controls the damper heater like category 3.
Summary of Contents for RS2530BSH
Page 10: ...10 2 3 Model Specification Comparison Chart PRODUCT SPECIFICATIONS ...
Page 76: ...8 BLOCK DIAGRAM 8 1 BLOCK DIAGRAM 76 ...
Page 77: ...BLOCK DIAGRAM 8 2 CONNECTOR ARRANGEMENT AND DETAIL EXPLANATION 77 ...
Page 79: ...PCB DIAGRAM 9 2 SUB PCB CONNECTOR CONFIGURATION 79 ...
Page 80: ...80 10 WIRING DIAGRAM ...
Page 81: ...11 CIRCUIT DIAGRAM 81 ...