Heat Controller BHD-301 User manual
Dehumidifier
Service Manual
CAUTION
-Before servicing the unit, read the "safety precautions" in this manual.
-Only for authorized service personnel.
HEAT CONTROLLER, INC.
MODELS: BHD-301
BHD-501
BHD-651
—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS...........................................................................................................................3
1.2 FEATURES AND DIMENSIONS ................................................................................................................3
1.2.1 FEATURES........................................................................................................................................3
1.2.2 DIMENSIONS ....................................................................................................................................3
1.3 SPECIFICATIONS......................................................................................................................................4
1.4 CONTROL TYPE........................................................................................................................................5
1.4.1 MECHANICAL TYPE.........................................................................................................................5
1.4.2 ELECTRONIC TYPE .........................................................................................................................5
1.5 HOW TO OPERATE DEHUMIDIFIER ........................................................................................................6
1.5.1 HOW DOES THE DEHUMIDIFIER WORK? .....................................................................................6
1.5.2 LOCATION FOR THE DEHUMIDIFIER.............................................................................................6
1.5.3 MICRO SWITCH................................................................................................................................6
1.5.4 AUTO DEFROST...............................................................................................................................6
1.5.5 HUMIDITY CONTROLLER................................................................................................................7
1.5.6 DRYER .............................................................................................................................................7
2. CIRCUIT DIAGRAM............................................................................................................................8
3.
DISASSEMBLY INSTRUCTIONS
3.1 MECHANICAL PARTS .............................................................................................................................10
3.1.1 BUCKET AND AIR FILTER .............................................................................................................10
3.1.2 FRONT CASE AND TOP COVER...................................................................................................10
3.1.3 CABINET AND CONTROL BOX .....................................................................................................10
3.2 CONTROL PARTS ..................................................................................................................................11
3.2.1 POWER CORD ASSEMBLY ...........................................................................................................11
3.2.2 SENSOR ASSEMBLY .....................................................................................................................11
3.2.3 PWB(PCB) ASSEMBLY, MAIN .......................................................................................................11
3.2.4 CAPACITOR....................................................................................................................................11
3.2.5 MICRO SWITCH ASSEMBLY .........................................................................................................11
3.2.6 COIL ASSEMBLY, SOLENOID .......................................................................................................12
3.2.7 CONTROL PANEL ..........................................................................................................................12
3.2.8 FAN AND MOTOR...........................................................................................................................13
3.2.9 DRAIN PAN .....................................................................................................................................13
3.3 REFRIGERATING CYCLE .......................................................................................................................14
3.3.1 CONDENSER, EVAPORATOR AND CAPILLARY TUBE...............................................................14
3.3.2 PTC OR OVERLOAD PROTECTOR (OLP) FOR RECIPROCATING COMPRESSOR .................14
3.3.3 ROTARY COMPRESSOR ..............................................................................................................14
3.4 HOW TO REPLACE REFRIGERATION SYSTEM ...................................................................................15
4. TROUBLESHOOTING GUIDE ...................................................................................................17
5. EXPLODED VIEWS..........................................................................................................................19
6. REPLACEMENT PARTS LIST...................................................................................................22
CONTENTS
—3—
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/BHD-651)
1.2.2 DIMENSIONS (mm/in)
Figure 1
385 (15 5/32) 340 (13 3/8)
540 (21 1/4)
—4—
1.3 SPECIFICATIONS
*NOTE: Specifications are subject to minor change without notice for further improvement.
CAPACITY(Pints/24hrs) 30 50 65
POWER SUPPLY(Phase,V,Hz) 1Ø, 115V,60Hz
INPUT(W) 480 630 830
RUNNING CURRENT(A) 5.9 5.7 8.4
ENERGY FACTOR(L/kw.h) 1.23 1.56 1.54
REFRIGERANT R134a R22
REFRIGERANT CHARGE, oz(g) 5.29(150) 7.23(205) 8.82(250)
THERMISTOR OPEN 33.8˚F(1±0.5°C)
CLOSE 50˚F(10±0.5°C)
SOLENOID VALVE
Using Temp/Humid.:-4~122˚F(-20~50°C)/95%RH
Rating:7W/90mA
COMPRESSOR MODEL No. LX86HAQG QA084CBC QA114CBD
TYPE P6R8MC
"WORKING
P.T.C ASSEMBLY TIME TIME:0.3~1.3sec -
RETURN TIME:65sec"
MAXIMUM AMPERE 10A
VOLTAGE 200V
PROTECTOR OVERLOAD PROTECTOR FOR COMPRESSOR
INTERNAL PROTECTOR(FUSE)FOR MOTOR
CAPACITOR - 35µF,270VAC 35µF,270VAC
MOTOR ASSEMBLY,SINGLE
Shaded pole motor,72W/1.4A,Thermal cutoff:266°FV/130°C
Shaded pole motor,91W/1.8A,Thermal cutoff:266°FV/130°C
SWITCH ASSEMBLY,MICRO 15A/250VAC
OUTSIDED MENSIONS WxHxD,mm(in) 385X540X340(15 5/32 x 21 1/4 x 13 3/8)
NET WEIGHT,kg(lbs) 23.1(51) 20.4(45) 22.2(49)
MODELS
ITEMS BHD-301 BHD-501 BHD-651
—5—
1
2
3
456
7
8
9
Off
Max
High
Low
Fan Speed
Humidity Control
Auto
Shut-Off
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
—6—
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 HOW TO OPERATE DEHUMIDIFIER
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 and BHD-651 models will continuously cycle up to a
temperature of 42°F(6°C).
Fan
Side View
Condenser
Evaporator
Motor
Compressor
Rear Grille
Bucket
Dry
Air Out
Humid
Air In
12"
12"
Figure 4
Figure 5
—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.
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.
Dryer
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
Figure 8
—8—
2. CIRCUIT DIAGRAM
•MODEL : BHD-301
Q'TY
PER SET
1
1
1
1
1
1
1
1
1
1
1
RE-
MARKS
S
S
S
S
S
S
S
S
S
S
S
1
2
3
4
5
6
7
8
9
10
11
DESCRIPTION
POWER CORD ASSEMBLY
SWITCH, ROCKER
MOTOR ASSEMBLY
PTC ASSEMBLY
RE-COMPRESSOR, SET
OLP
PWB(PCB) ASSEMBLY, DISPLAY
SENSOR ASSEMBLY
SWITCH ASSEMBLY, ROTARY
SWITCH ASSEMBLY, MICRO
PWB(PCB) ASSEMBLY, MAIN
BHD-301
6411A20001Z
6600FX5001G
4681A20040J
6748C-0003D
2521C-A8626
6750C-0009E
6871A20289B
6877A30013L
6601A30001B
6600A30003C
6871A10142A
PART NO.
NO.
S: SERVICE PARTS A: ALTERNATE PARTS N: NOT SERVICE PARTS
—9—
•MODEL : BHD-501/BHD-651
Q'TY
PER SET
1
1
1
1
1
1
1
1
1
1
RE-
MARKS
S
S
S
S
S
S
S
S
S
s
1
2
3
4
5
6
7
8
9
10
DESCRIPTION
POWER CORD ASSEMBLY
MOTOR ASSEMBLY
CAPACITOR
COMPRESSOR, SET
OLP.
PWB(PCB) ASSEMBLY, DISPLAY
SENSOR ASSEMBLY
SWITCH ASSEMBLY, MICRO
PWB(PCB) ASSEMBLY, MAIN
COIL ASSEMBLY, SOLENOID
BHD-501 BHD-651
6411A20001Z
4681A20040J 4681A20040K
0CZZA20001R 0CZZA20005J
2520UCAA014 2520UCBA007
6750U-L058A 6750U-L048A
6871A20460A
6877A30013L
6600A30003C
6871A10141C
6421A20003V
PART NO.
S: SERVICE PARTS A: ALTERNATE PARTS N: NOT SERVICE PARTS
NO.
3.1 MECHANICAL PARTS
3.1.1 BUCKET AND AIR FILTER
1. Turn the Humidity Control off(Mechanical type) or
press the power button off. (Electronic type)
2. Disconnect the power supply.
3. Remove the bucket. (See Figure 9)
4. Pull out the air filter.
(See Figure 10)
3.1.2 FRONT CASE AND REAR GRILLE
1. Remove 2 screws which fasten the front grille.
2. Pull the front grille forward and upward.
(See Figure 11)
3. Remove 6 screws that secure the rear grille.
4. Remove the rear grille. (See Figure 12)
3.1.3.
CABINET AND CONTROL BOX
1. Remove the Bucket, the Air filter and Front grille
according to the procedure above.
2. Remove 1 screws that fasten Control box.
(See Figure 13)
3. Remove 9 screws on all sides of the cabinet.
4. Lift the Cabinet from the base.(See Figure 13)
5. Remove a screw fasten the earth wire on the inside
of control box.
6. Remove 1 screw that fasten control box and
unhook control box from hook on the shroud.
(See Figure 14)
—10—
3. DISASSEMBLY INSTRUCTIONS
Figure 9 Figure 10
Figure 11 Figure 12
Figure 13 Figure 14
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