R efrigerant Chiller
PRODUCT USER MANUAL
For DC300, DC750, DC2200, DC4000
CONTENTS
PARTS LIST 2
INTRODUCTION 3
FEATURES 3
SUGGESTIONS FOR SAFE OPERATION 3
SPECIFICATIONS 4
EXAMPLE PERFORMANCE CURVES 4
INSTALLATION 5
OPERATION 7
CLEANING AND MAINTENANCE 9
STEPS FOR FILTER CLEANING 9
GUIDE TO SIMPLE PROBLEM SOLVING 10
WARRANTY 10
PARTS LIST
(1) Front filter cover (2) Filter (Front filter models only) (3) Control panel (4) Front cover (5) Circuit board
(6) Tank (with evaporator) (7) Seal sleeve (8) Filter (side filter models only) (9) Side filter cover (10) Middle cover
with power supply switch (DC300/DC750 only) (11) Water inlet and outlet adaptor (12) Nut (13) Handle where
applicable (14) Back cover (15) Condenser (16) Fan (17) Base (18) Compressor (19) Junction box (20) Back cover
of circuit board.
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INTRODUCTION
Thank you for purchasing a D-D DC series aquarium chiller, which oers an economical and technologically
advanced solution to the cooling of your aquarium.
Excessive temperatures in your aquarium can now be quickly and easily controlled by selecting the correct
model from the D-D DC chiller range, which use a heat exchanger that is manufactured from high-grade pure
titanium, making the chillers suitable for applications in fresh or salt water aquariums.
The system design and high eciency compressor reduce the forces on the rotor, which results in significantly
lower noise levels, whilst the digital temperature controller ensures that the selected temperature is maintained.
Our chillers use the environmentally friendly R134a refrigerant.
D-D DC series chillers are robust, with a strong chassis and aesthetic, non-corrosive, ABS plastic housing which
ensures that the chiller does not look out of place in any surroundings.
Please read this installation and maintenance manual carefully before operating the chiller to prevent errors or
improper use. Failure to do so may result in loss of fish or damage to this unit.
FEATURES
1. Micro-computer control system for accuracy and ease of operation.
2. Large refrigeration capacity, aquarium water can be refrigerated to any temperature above 4°C in a short
period of time.
3. Uses environmentally friendly R134a Freon-free refrigerant.
4. Anti-corrosive pure titanium evaporator for both fresh & salt water use.
5. Over-current protection device system.
6. Temperature memory system, automatically returning to the previously set temperature following a power
failure to protect the fish in the aquarium.
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ADDITIONAL FEATURES DC4000
1. Integrated heating and cooling system. Unit can be used for heating in the winter and cooling in the summer
but do not operate at the same time.
2. Super silent revolving compressor from Mitsubushi/Panasonic/Hitachi from Japan for extra eciency and
lower power consumption.
3. Cools down to 3°C
4. Built in auto-defrosting system and drain for heating cycle.
SUGGESTIONS FOR SAFE OPERATION
Several symbols are used in this manual and on the product itself to ensure safe and proper operation to
prevent injury to yourself or others or damage to the chiller. The meanings of these symbols are explained
below. Please be sure you understand their meanings before you read this manual.
EXPRESSIONS (TERMS AND SYMBOLS)
The degree of danger will be indicated by the terms or shown by pictures. The symbols on the left are a general
indication but specific details of the action which must be taken will be shown by a picture or explanatory text
beside the symbol.
This symbol advises you of an item which should be noted (including danger and warning).
This term indicates the possibility that ignoring this notification, or working incorrectly without full
understanding, may cause personal injury or physical damage.
This symbol advises you of an action which must be taken (is mandatory) in order to avoid danger.
This symbol advises you of an action which must not be taken (is prohibited) in order to avoid danger.
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SPECIFICATIONS
DC300 DC750 DC2200 DC4000
Voltage 220-240V 220-240V 220-240V 220-240V
Frequency 50Hz 50Hz 50Hz 50Hz
Working Current 0.8 A 1.8 A (3.0A) 3.2 A 7A
Power 1/15HP 1/4HP 1HP 2HP
Cooling Wattage 300W 750W 2200W 4000W
Water Flow Rate 200-1000L/h 1000-2500L/h 1000-2500L/h 3000-6000L/h
Refrigerant R134a R134a R134a R407C
Refrigerant Weight 120g 170g 600-650g 800-1000g
Weight 9.5Kg 18.6Kg 31.3Kg 47Kg
Dimensions (mm) 338x218x325 448x330x440 520x400x480 634x4680x590
Water Volume Cooling Examples
Ambient Room Temperature 30ºC 30ºC 30ºC 30ºC
Water Temperature Before Refrigeration 28°C 28°C 28°C 28°C
Refrigeration Time 20h 20h 20h 20h
Water Volume Refrigerated (Example A) 150L 300L 1000L 2000L
Water Temperature After Refrigeration 18°C 18°C 16°C 16ºC
Water Volume Refrigerated (Example B) 300L 600L 2000L 4000L
Water Temperature After Refrigeration 22°C 22°C 22°C 22°C
1. The rate of flow is dictated by the duty of the pump or water supply system which must be purchased in
addition to the chiller.
2. The refrigeration performance test is carried out at an ambient temperature of 30°C without any other
additional heat sources.
3. The cooling rate and eciency will be aected by the installation location and any heat sources, such as
heat from lighting or pumps.
4. Refrigeration eciency will decrease when there is insucient ventilation within the cabinet or room due
to heat from the unit.
EXAMPLE PERFORMANCE CURVES
AMBIENT TEMPERATURE: 30°C. INITIAL WATER TEMPERATURE 28ºC.
REFRIGERATED WATER VOLUME: DC300 - 150L, DC750 - 300L, DC2200 - 1000L, DC4000 - 2000L
The refrigeration performance test is carried out at an ambient temperature of 30°C without any other additional
heat sources.
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INSTALLATION
When the chiller carton is unpacked, check to see if the chiller is the right model and that no damage to the unit
has occurred during transportation. You should also check that all spare parts and accessories are included as
listed below.
1. PLEASE CHECK THE CONTENTS OF THE PACKAGE:
D-D DC Series Chiller - 1 set.
Instruction manual - 1 piece.
Water inlet & outlet connector - 2 pieces.
EU Plug and UK fused plug adaptor - 1 piece (not included on DC4000 model)
2. INSTALLATION POSITION:
(1) Do not install the chiller outdoors. (Fig.1)
(2) Select a position as cool as possible and keep the unit away from flammable sources, high temperature,
direct sunshine, moisture or dust. (Fig.2)
(3) Place the unit on a horizontal stable surface. (Fig.3)
EN
(4) Install at least 20-40cm away from any wall or structure for venting. (Fig.4)
(5) Do not cover the chiller whilst it is working, avoid shaking or colliding with other objects directly.
(6) This chiller does not have a built-in water pump and so a suitable pump to circulate water is required as
indicated in the specification table. The pump head pressure should be no more than 8m maximum and
should be fitted with a pre-filter. If other equipment out of specification is used, it may cause water leakage
or other damage. (Fig.6)
(7) Never store or stand the chiller upside down or on its side as this may damage the unit. If it has been stored
in this orientation, then stand the correct way up and wait for at least 20 minutes before starting. (Fig.7)
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3. SUGGESTIONS FOR INSTALLATION:
1. Electrical work must be done by a qualified electrician.
2. A dedicated power outlet should be used for the unit.
3. Ensure that the power source conforms to the power requirements specified on the product nameplate.
4. The power supply should be fitted with earth leakage breaker.
5. Disconnect the power during installation.
6. The DC4000 model is not fitted with a plug and should be professionally wired using a suitable contactor.
4. INSTALLATION METHODS
Note: The chiller must be operated with a recirculating and filtered water supply system.
The chiller also can be installed in a hidden position, such as inside a closed aquarium cabinet, however if your
cabinet has no ventilation or grilles then they must be created, allowing a minimum opening area of 450cm2
for the flow of air. When the grilles are being formed, make sure that the air intake openings are in alignment
with the grilles on the chiller and that the air outlet grille on the cabinet is made as high as possible to eciently
expel the hot air. The chiller should be installed with its back as near as possible to the grille of the cabinet
to allow fresh air circulation. For the best air circulation, it is suggested to install your chiller outside of the
aquarium cabinet.
If the chiller is placed under a water fish tank fitted with filter, the water feed can go directly to the inlet feed of
the chiller. For salt water, it is especially important that the water must be filtered before feeding the chiller, or
there is a possibility of blocking the coil and this will aect the cooling.
5. BEFORE STARTING THE OPERATION OF THE CHILLER, PLEASE CHECK THE FOLLOWING:
(1) Check if the water level inside the aquarium is suitable for the continuous supply of water.
(2) Make sure that there are no water leaks from the hose and pipe connections.
(3) Insert the power plug fully into the power outlet so that the plug itself does not wobble.
(4) Double check the circulating & filtration system, especially that the circulating tube is not clogged.
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OPERATION
Note: Before starting the chiller, you must run the pump to ensure the correct operation of the water circulating/
filtration system.
There are three buttons for changing or setting the temperature on the control panel. (4 buttons on the
DC4000 model)
AQUARIUM TEMPERATURE DISPLAY & SET TEMPERATURE DISPLAYS
When in operation, the display of the chiller will show the current water temperature. Press the (SET) button
once and the display will change to show the current set temperature for the unit, a dot (1) on the display
twinkles to indicate the setting temperature. Press the SET button once again or wait for 8 seconds and the
display will return to the aquarium temperature.
ADJUSTING THE SET TEMPERATURE
Press the (SET) button for more than three seconds to enter the programming mode, indicated by a beep
and the current set temperature value will flash on the display. Press the
or button for decreasing the temperature to set your new required parameters. You will hear a beep with
each press whilst in programming mode. Press the (SET) button again to save or just wait for eight seconds.
The display will revert to the temperature of the aquarium water whilst the chiller is working. The available
temperature set range is from 4ºC to 28ºC.
button for increasing temperature
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DC4000 ONLY - ADJUSTING THE SET TEMPERATURE
There are 4 keys on the control panel for this larger model to control the cooling and additional heating cycle.
To adjust the chiller temperature, press (COLD) for 3 seconds and then follow the standard set temperature
adjustment instructions above. Temperature adjustment is available between 3ºC to 46ºC
To adjust the heating temperature, press (HEAT) for 3 seconds and then follow the standard set temperature
adjustment instructions above. Scroll through the modes with the
“TPS” will be shown on the display to indicate the heating temperature is enabled. Temperature adjustment is
available between 3ºC to 46ºC.
“DST” will be shown on the display to indicate the temperature to start defrosting.
“DFT” will be shown on the display to indicate the temperature to stop defrosting.
Confirm the required mode by pressing (HEAT) again and the current set value will appear on the display, press
the
CHANGING DEFROST START AND STOP TEMPERATURES
The heating circuit of this chiller has a defrost function to maintain heating eciency. This is not used on the
cooling mode.
To change the START defrost temperature (default -3ºC), choose function DST from the above menu and press
(HEAT) again to enable the setting mode. Press the
-15ºC to +3ºC).
To change the STOP defrost temperature (default +5C), choose function DFT from the above menu and press
(HEAT) again to enable the setting mode. Press the
-12ºC to +15ºC).
arrows to choose the required value and then press (HEAT) again to set or wait 8 seconds.
arrows to choose the defrost start temperature (from
arrows to choose the defrost stop temperature (from
arrows.
ADJUST HYSTERESIS TEMPERATURE
With the DC4000 model it is possible to adjust the hysteresis value between the on temperature and the o
temperature between 1ºC and 3ºC. At 1ºC the chiller will switch o and o more often but maintain a tighter
temperature range.
Press the
key for 3 seconds until the digits twinkle and press the buttons to adjust the value.
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TEMPERATURE CALIBRATION
It is possible to calibrate the temperature of your chiller to match another piece of equipment, such as a high
precision thermometer/temperature controller/aquarium computer, or to create an oset to match the water
temperature in the aquarium if the chiller is remotely positioned.
Press the
and together and hold for 6 seconds. It is then possible to adjust the reading up or down
through 1.5 degrees in 0.1 degree steps.
If this function is not specifically required, then we suggest that you leave the reading at factory setting.
CHILLER PROTECTION SYSTEM
A protection system is built into the chiller which prevents the refrigeration compressor from starting for three
minutes between cooling cycles during normal operation or after a reset or when in use for the first time. If used
with a third-party external temperature controller then the chiller will see this as a reset and delay for 3 minutes
before starting the compressor.
AUTOMATIC ON & OFF SWITCHING OF THE REFRIGERATION COMPRESSOR
When the refrigeration compressor has not been running for over three minutes and the water temperature is
1 ºC above the set temperature, the compressor will start to work again automatically.
The compressor will continue to run and cool the water then stop working automatically when the aquarium
water temperature reaches or falls below the set temperature.
The indicator light (7) shows that the chiller is working. The light turns o when the aquarium water temperature
reaches the set temperature & the compressor stops running, the light twinkles to show that the protection
device is delaying the compressor from restarting for three minutes.
FAULT DISPLAY SYSTEM
Some breakdowns will automatically show on the display. When the water temperature sensor is broken the
letter. P1/(E1 – DC4000 model) will appear on the display and the protection device will respond to stop the
chiller. E2 – DC4000 MODEL will be shown if the defrost circuit is not working.
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CLEANING AND MAINTENANCE
1. Cleaning of the circulating system and the filtration system is recommended each month to maintain maximum
refrigeration operation and eciency. Always unplug the cord from the outlet before cleaning. Rinse collected
debris from the filter media, inlet & outlet pipe, flow diverter, impeller and chamber cover in clean lukewarm
tap water. Soap or detergents are not recommended for circulation filter maintenance because they can be
bad for the fish’s health. (Fig.1)
2. Remove the dust from the air inlet and outlet with a brush or vacuum cleaner. To avoid electric shock, during
operation do not insert wires or tools into the exhaust outlet or the air inlet. (Fig.2)
3. The plug, electric supply switch and temperature adjuster must be cleaned with dry soft cloth. (Fig.3)
4. NEVER immerse the unit into water or flush it directly with water to prevent damage to the electric insulation
of the chiller. (Fig.4)
5. Disconnect the power supply plug if the unit is not to be used for a long time. Remove the inlet & outlet pipes
and tilt the front of the chiller to remove water from the unit. Clean all of the parts with a soft cloth and cover it
with a plastic bag and store upright in a safe and dry place. (Fig.5)
6. If you still have any other questions, please contact your dealer. (Fig.6)
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STEPS FOR FILTER CLEANING (FRONT OR SIDE FILTERS)
1. Loosen the screw on the front of the inlet cover, turn counter clockwise (Fig.1).
2. Pull the inlet cover forward carefully by hand (Fig.2).
3. Loosen the screws of the filter and remove (Fig.3.4).
4. Lift and remove side filter covers (Fig.5).
5. Loosen the screws of the side draft hood & remove the filter (Fig.6.7).
6. Remove the dust with a brush or vacuum cleaner or rinse it well with water and dry completely before
reinstalling (Fig.8).
7. Reinstall in reverse.
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GUIDE TO SIMPLE PROBLEM SOLVING
Before calling customer service, please check the following chart for possible causes to the problems you are
experiencing.
SYMPTOM CAUSE SOLUTION
The chiller does not run and the display is
dead.
Power not turned on
Loose plug
Turn on the power
Be sure the power cord is fully plugged in
The fuse has blown
The chiller switches on and o Connected to wrong voltage
and/or frequency
Refrigeration capacity reduces or even no
refrigeration
Runs noisy or with vibration The base is not flat Mount on a level surface
The chiller protection device is
operating as normal
The setting temperature is
higher than the aquarium water
temperature
The air inlet and outlet are
clogged with dirt
Loss of refrigerant medium
Too much water flow
Change for a new fuse
Connect to correct power source,
according to the name plate
Wait for 3 minutes and the chiller will turn
on again automatically
Change the refrigeration temperature
Clean the dust from the air inlet and outlet
with a brush or a vacuum cleaner
Refill the chiller with the correct
refrigerant. Carried out by a qualified
engineer.
Reduce water circulation
WARRANTY
1. This product is warranted by us against defects due to faulty workmanship or materials.
2. If the product has been damaged under normal use it will be entitled to be repaired for free. Repairs under
warranty are provided only upon production of proof of purchase if the date of the claim is within the
guarantee period.
3. The warranty is not valid if the defect is due to accidental damage, misuse or neglect and in case of
alterations or repair carried out by unauthorized personnel.
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