Humidity Controller; Dryer - Heat Controller BHD-301 Service Manual

1.5.5 HUMIDITY CONTROLLER

1.5.5.1 Mechanical Type
The humidity control can be set anywhere between Off and
Max for normal operation.
If you need more dehumidification, turn the Humidity Control
toward Max. If you need less dehumidification, turn the
Humidity Control toward Off.
The relative humidity range is from 20% to 80%. (See
Figure 6)
Turn the Humidity Control to Off to stop the unit manually.
1.5.5.2 Electronic Type
The humidity control can be set 'on' or 35%-70%
RH(Relative Humidity) for normal operation. (See Figure 7)
If you need drier air, press the
If you need moister air, press the
button.
Press the Power button to stop the unit manually.
1.5.6 DRYER (BHD-301)
Dryer is used to prevent capillary blockage from moisture in
the refrigerant system and H/E, condenser and evaporator.
Also, dryer is used to remove corrosion of the components.
NOTE: When dryer is replaced, proper injection to
capillary is needed. On opening the dryer, it
should be welded instantly. The oxidization of
dryer inside and all tubes inside after welding
can be prevented.
Humidity Control button.
Humidity Control
42% R.H
4(50%)
3(60%)
2(70%)
1(80%)
Off
—7—
5(42%)
40%
6(35%)
7(30%)
8(25%)
9(20%)
Max.
DEAD DIAL
Figure 6
Figure 7

Dryer

Figure 8