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Heat Controller
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BHD-301-D
User Manual
27 pgs5.57 Mb0

Heat Controller BHD-301-D, BHD-651-D, BHD-501-D User Manual

HEAT CONTROLLER, INC.
MODELS: BHD-301-D
BHD-501-D BHD-651-D
Dehumidifier
Service Manual
CAUTION
-Before servicing the unit, read the "safety precautions" in this manual.
-Only for authorized service personnel.
1. PREFACE
This Service Manual provides various service information, including the mechanical and electrical parts. This dehumidifier was manufactured and assembled under the strict quality control procedures.
The refrigerant is charged at the factory. Be sure to read the safety precaution prior to servicing the unit.
1.1 SAFETY PRECAUTIONS
• Disconnect the power supply before servicing or replacing any component.
• Do not cut off the grounding prong or alter the plug in any manner.
1.2 FEATURES AND DIMENSIONS
1.2.1 FEATURES
• Quiet operation
• High efficiency
• Adjustable humidistat
• Automatic defrost
• Automatic shut-off
• Bucket-full indicator light
• Easy roll casters
• Removable & large capacity bucket.
• Washable air filter
• Two-speed fan
• Drain hose connection.
• Low temperature operation (BHD-501-D/BHD-651-D)
1.2.2 DIMENSIONS (mm/in)
385 (15
5
/
32
)
340 (13
3
)
/
8
)
4
/
1
540 (21
Figure 1
—3—
—5—
Humidity Control
• When you first use the dehumidifier, turn the humidity control to 5 or 6. If you still have moisture, turn the humidity control to a higher setting. MAX is the highest setting.
• When excess moisture and dampness odors are gone, adjust the control to a lower setting. Use the dehumidifier as long as excess moisture is present.
Fan Speed
• The fan control adjusts the fan speed. Set the fan control to HIGH for maximum moisture removal. When the humidity has been reduced and quiet operation is preferred, set the fan control to
LOW.
Bucket Full Indicator
• This light glows when the water bucket is full and needs to be emptied.
Power
• Operation starts when this button is pressed and stops when the button is pressed again.
Auto Shut-Off
• This light glows when the bucket is full, or when the bucket is removed or not placed in the proper position. In these cases the Water Level Control Switch shuts off the dehumidifier.
• When the light glows, check the bucket condition.
Fan Speed
• This controls the speed of the airflow.
• High: Fan speed is set to high.
• Low: Fan speed is set to low.
• When Fan Speed button is pressed, the fan speed
mode is changed.
Timer
• Press this button to select type of operation.
• Select continuous On for uninterrupted operation.
• Select either 2 or 4 hr. On/Off for cycled operation:
The unit will operate for 2 or 4 hours, and then shut off completely for 2 or 4 hours. The cycle repeats until you change the setting.
• When Timer button is pressed, the Timer indicator lights shift as follow from 2hr.On/Off to 4hr.On/Off.
Auto Restart
•
Once power is restored after a power outage, the unit returns to its previous operation setting after a 2 minute delay. The fan runs immediately when the power is restored.
Humidity Control
• This button controls the humidity in the room.
• Press button to raise the humidity setting.
• Press button to lower the humidity setting.
• The humidity setting can be set to a permanent "On"
setting or to a specific humidity setting between 35% and 70% in 5% increments.
• "On" setting: Dehumidifier runs continuously regardless of humidity condition.
• 35% - 70% setting: Dehumidifier runs on and off according to surrounding humidity conditions.
Figure 2
Figure 3
1.4 CONTROL TYPE
1.4.1 Mechanical type
1.4.2 Electronic type
5
6
4
3
2
Auto
Shut-Off
1
Off
Humidity Control
Max
7
8
9
Fan Speed
High
Low
1.5 HOW TO OPERATE DEHUMIDIFIER
Fan
Side View
Condenser
Evaporator
Motor
Compressor
Rear Grille
Bucket
Dry
Air Out
Humid
Air In
12"
12"
Figure 4
Figure 5
1.5.1 HOW DOES THE DEHUMIDIFIER WORK?
Moist, humid air is drawn over a cold refrigerated dehumidifying coil. Moisture in the air condenses on this coil and drains into a bucket (or through the bucket into a hose and drain).
Dry, clean air is drawn over the condenser where it is actually heated several degrees and discharged out the rear grill into the room. (See Figure 4)
■It is normal for the surrounding air to become slightly warmer as the dehumidifier operates.
This warming effect further reduces the relative humidity of the surrounding air.
1.5.2 LOCATION FOR THE DEHUMIDIFIER
Allow at least 12 inches of space on all sides of the unit for good air circulation. (See Figure 5)
■The dehumidifier must be operated in an enclosed area to be most effective.
■Close all doors, windows and other outside openings to the room.
Place the dehumidifier in a location that does not restrict air flow into the front grille or out the rear grille.
The operation of dehumidifier in a basement will have little or no effect in drying an adjacent enclosed storage area, such as a closet, unless there is adequate circulation of air in and out of the area.
1.5.3 MICRO SWITCH
The micro switch assembly, which is located on the drain pan of inside unit, automatically shuts off the dehumidifier when the bucket is full (note, the Auto Shut Off lights, to indicate bucket must be emptied). The bucket replaces in its place, the unit again turns itself on.
1.5.4 AUTO DEFROST
When frost builds up on the cooling coils, the unit will automatically cycle off until the frost disappears. The fan continues to run.
NOTE: The unit will not operate satisfactorily if the room temperature is below 65˚F(18˚C). If the dehumidifier is
operated in low temperature conditions frost can form in the evaporator coil and the unit will cycle ON/OFF repeatedly. In this case, please check your room temperature conditions and stop the unit.
NOTE:
The low temperature operation feature in the BHD-501-D and BHD-651-D models will continuously cycle up to a
temperature of 42°F(6°C).
—6—
—7—
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 Humidity Control button. If you need moister air, press the Humidity Control
button. Press the Power button to stop the unit manually.
42% R.H
40%
7(30%)
6(35%)4(50%)
3(60%)
2(70%)
1(80%)
5(42%)
8(25%)
9(20%)
Max.Off
DEAD DIAL
Figure 6
Figure 7
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