Increasing Fan Speed - Samsung IDH1800E Service Manual

Installation

4-4-21. Increasing Fan Speed

If external static pressure is too great(due to long extension of ducts, for example), the air flow volume may drop too
low at each air outlet. This problem can be solved by increasing the fan speed using the following procedure.
1. Remove the screw on the electrical component box and
remove the cover plate.
2. Adjust the DIP switch(SW2) on the main PCB to the "OFF"
position.
Switch No. Switch Position
5
3. Re-install the cover plate and join the removed screw.
How to Read Diagram
1. The vertical axis is the external static pressure(mmAq) while the horizontal axis represents the AIR
FLOW(m /min).
3
2. The characteristic curves for 'HH', 'H', 'Med', and 'Low' fan speed controller are shown.
3. The nameplate values are shown based on the 'H' air flow.
4. In case of model ADH2400E/DH24ZA1(A2), the air flow is 17.4(m
pressure is 4mmAq at 'H' position.
5. If external static pressure is too great, the air flow volume may drop too low as explained above.
Note : HH : DIP Switch OFF position(High speed)
ADH1800E, DH18ZA1(A2)
Air Flow (m 3 /min)
4-36
Function
ON Normal speed
OFF High speed
H : At shipment(Normal speed)
ADH2400E, DH24ZA1(A2)
3 /min), while the external static
Air Flow (m 3 /min)
ADH3200E, DH32ZA1(A2)
Air Flow (m 3 /min)
Samsung Electronics