372 ROUTE 4 BARRINGTON, NH 03825 USA
E-Mail:[email protected]
TEL (603) 868-5720
FAX (603) 868-1040
1-800-435-6708
SEA FROST BD 12 OR 24 VOLT D.C. SYSTEM
With Water Cooling Option
CONDENSING UNIT LOCATION AND MOUNTING
The water-cooling option should be considered supplemental cooling. Installation
should proceed with a proper air-cooled installation first. The water-cooling feature
should be used to enhance efficiency on occasions when cold-water temperatures are
encountered or interior cabin air temperatures are extreme.
The design of the Sea Frost BD allows placement in an enclosed space such as a cabin
locker or sail locker. Intake air should be drawn in from the cabin area to insure the
coolest, driest air supply. Standard 4" duct hose may be used. Discharge may need to
be vented to allow warm air to escape. Intake ducting from the exterior of the boat may
cause damp salt air to be drawn in which might reduce the life of your BD. This will also
increase below deck moisture. ALLOW 1.5" CLEARANCE BETWEEN THE
CONDENSER (BACK VENT AREA) AND ANY BULKHEAD TO INSURE PROPER
AIRFLOW THROUGH THE CONDENSER.
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PUMP WIRING
Connect the red pump wire to the terminal screw marked pump (+) and the black one to
(-) under the compressor housing cover. Be sure the toggle switch is off until the boat is
launched and the pump is wet.
MOUNTING THE EVAPORATOR PLATE
The plate should be mounted in the cabinet as high as possible to take advantage of
thermal convection. It may be used as a shelf, mounted on the ceiling or any wall.
There is no restriction as to position. Standard aluminum ice trays may be used for ice
making if the plate is used as a shelf. If the plate is wall mounted a vertical ice tray kit is
available. Before mounting the plate, consider access to the thermostat.
The Sea Frost BD plate mounts with a
Wellnut expandable neoprene blind hole
fastener. A template or the plate itself
should be used to locate the mounting
holes. Drill a 3/16" pilot hole. Increase
this hole to 3/8". Install the screw into the
plate through the spacer then tighten the
screw in the Wellnut. Install the plate
pushing the rubber mounts in to the pre-
drilled holes. Tighten the screws.
INSTALLING REFRIGERANT LINES
Two copper lines connect the stainless steel evaporator plate and the compressor. One
is 5/16" and the other is 1/8".
Run the lines behind any and all serviceable parts. Avoid heated engine spaces. Do
not coil excess tubing in an engine space. Protect the lines from being crushed,
snagged or stepped on.
The quick connect fittings require a 1 inch diameter clearance hole and are staggered to
allow passing through a bulkhead or insulated wall. Keep the plastic cap and shrink
wrap protective cover in place until the connections are made.
WORK CAREFULLY WITH THE COPPER TUBES TO AVOID PINCHING OR
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KINKING THE TUBES. ALL BENDS SHOULD BE SMOOTH WITH NO LESS THAN
A 2" RADIUS.
Support the tubing every 18 inches as necessary using tie wraps fastened with self-
tapping screws.
Insulate at least 3' of the line set as it exits the refrigerator box. Seal both sides of the
exit holes in the refrigerator box with permagum sealing compound.
WARNING:
The Sea Frost BD system is shipped pre-charged with refrigerant. This refrigerant
is under some pressure. Do not fiddle with the connectors or the service ports.
You might get hurt! Wear safety glasses when connecting the compressor
fittings.
COMPRESSOR CONNECTIONS
The connections in the BD system are self-sealing when connecting and disconnecting.
It is very important to inspect (and clean if necessary) the surfaces and "o" ring seals
before assembly. If dirt, moisture, or grit, is on these connectors the system may be
contaminated or the seal may be ruined.
Working with one line at a time, remove the heat shrink material and the plastic caps.
Connect the larger copper line to the compressor fitting. Connect the small copper line
to the remaining fitting.
Use two wrenches to tighten the fittings wrench snug. DO NOT OVER TIGHTEN!
ELECTRICAL CONNECTION
Follow ABYC wiring guidelines for proper, safe wiring.
VOLTAGE
12 D.C. or 24 D.C.
AMP/HR DRAW
PEAK AMP/HR START (12 volt)
LOW VOLTAGE CUT OFF
4.5 TO 6 @ 12 VOLTS PUMP ADDS 1 AMP/HR
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10.4 VOLTS @ 12 VOLTS
22.8 VOLTS @ 24 VOLTS
WIRE SIZE TO BATTERY SUPPLY AWG # 10 TO 10 FEET
AWG # 8 MAXIMUM 25 FEET
FUSE:
15 AMP MAX MUST BE INSTALLED AT BATTERY
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WIRE SIZE
12-volt installations use AWG #10 wire for distances up to 10 feet for the wire pair, and
#8 AWG wire for distances up to 25 feet for the wire pair. Fuse 15 Amps.
24 Volts: The module will self calibrate to the applied voltage and provide proper fan
voltage. The remote water pump must be a 24volt pump. Fuse 7.5 Amps.
If the polarity is reversed, the electronic module will not work.
In any application, use the next largest wire if in doubt to prevent a voltage drop. A fuse
is preferred over a breaker as it has less potential voltage drop.
CONNECTIONS
For best performance, the electronic module must always be connected directly to the
battery or battery selector switch. Connecting the module through the boat's breaker
panel may cause a voltage drop; small wires and multiple connectors create resistance.
FOR PROTECTION OF THE INSTALLATION, AN EXTERNAL FUSE MUST BE
INSTALLED CLOSE TO THE BATTERY IN THE POWER SUPPLY (+) CABLE.
The fuse is not provided. Connect a red wire from 12 or 24 volts positive to the (+)
terminal of the line in terminal strip. Connect a black wire from 12 or 24 volts negative
to the (-) terminal of the line in terminal strip.
Do not operate the BD directly from a DC charger without a battery.
REFRIGERANT CHARGE
This system operates with refrigerant R-134a and is pre charged.
The proper charge amount is 5-6 oz.
An automatic expansion valve regulates the evaporator pressure. This valve is factory
adjusted to maintain a constant evaporator pressure of 0 to 2 psi. Do not remove the
heat shrink tubing and plastic cap or turn the knob beneath it.
Technicians note: Charge amount will not affect the evaporator pressure.
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STANDARD THERMOSTAT WIRING CONNECTIONS
Connect the thermostat wires to the yellow wire harness, which is connected to
terminals C and T on the module. The yellow wire harness contains a 1500-ohm
resistor, which programs the module to operate the compressor at maximum RPM.
There is no polarity requirement.
STANDARD THERMOSTAT OPERATION
The thermostat is attached to the plate. The wires follow the refrigerant lines to the
compressor section. Protect these wires from cuts and chafe.
The BD thermostat is variable. Turning the knob fully counterclockwise turns the unit
"OFF". The fully clockwise setting is the coldest. The thermostat may be adjusted to
obtain any temperature desired in the cabinet and the thermostat may be calibrated
should the warmest setting be too cold.
To calibrate the thermostat remove the upper and lower screws on the stainless steel
cover. Carefully move the stainless steel thermostat cover to reveal the white plastic
cover, which is on the thermostat. Underneath the white plastic cover, locate the
calibration screw.
To lower box temperature, rotate this screw counter clockwise. One full revolution will
change the box temperature approximately 6 degrees F.
To raise the temperature in the box rotate the screw clockwise.
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OPTIONAL REMOTE THERMOSTAT OPERATION
Attach the sensing bulb with the bulb clip to one
of the lower mounting screws on the plate. The
sensing bulb must be in excellent thermal contact
with the plate. We recommend that the probe be
mounted on the plate in one of the lower mounting
positions as shown in the drawing below. This is
best because these positions remain colder.
The SEA FROST BD thermostat is variable. Turning the knob fully counterclockwise
turns the unit "OFF". The fully clockwise setting is the coldest (three snowflakes). The
thermostat may be adjusted to obtain any temperature desired in the cabinet. The
thermostat may be calibrated should the warmest setting be too cold. To calibrate the
thermostat remove the mounting screws and tip the panel forward. Remove the
electrical tape to expose a black #7 torx adjustment screw about an inch into the case.
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To lower box temperature, rotate this screw counter clockwise. One full revolution will
change the box temperature approximately 6 degrees F. To raise the temperature in the
box rotate the screw clockwise.
Make small adjustments. Record all adjustments.
OPERATION DESCRIPTION
Once installed the BD is started by turning the thermostat clockwise from the off
position. The BD will run until the plate reaches the set temperature of the thermostat.
Turning the thermostat clockwise lowers the temperature at which the BD will switch off.
The BD will remain off until the plate temperature rises about 6 degrees. (The BD is
either on or off. It will not cool faster with a colder setting.)
The SEA FROST BD is a small system. It is efficient in its electrical conversion of
energy to heat movement. By being small it is quiet, compact, has low electrical starting
requirements and running power draw, and is able to be air-cooled. It will take some
time to cool a warm cabinet.
Pump Operation: The water pump has a switch on the left end of the compressor
cabinet. The on switch position for the pump is up. With the pump switch on the pump
will operated automatically when the compressor starts.
Switch off the pump when the refrigeration demand is low. This will extend the life of
the pump. Be sure the pump is switched off when dockside, when motoring and when
hauled.
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DEFROSTING
Excessive frost/ice build up on the plate will reduce the cooling effect by insulating the
evaporator plate. Allowing the evaporator plate to warm above freezing is one method
of defrosting. Boiling water or a scraper will also work.
OPERATION INSPECTION
Within a few minutes of starting the Sea Frost BD, the tubing in close proximity to the
valve mounted on the plate and the valve itself will be noticeably cold. IF AFTER 20
MINUTES OF OPERATION, COOLING IN THIS AREA IS NOT OBSERVED DO NOT
CONTINUE TO OPERATE THE SYSTEM.
IMPORTANT: When using the water pump, check water flow and periodically inspect
and clean the seawater strainer.
OPERATIONAL INFORMATION
VOLTAGE
12 D.C. or 24 D.C.
AMP/HR DRAW
PEAK AMP/HR START (12 volt)
LOW VOLTAGE CUT OFF
4.5 TO 6 @ 12 VOLTS PUMP ADDS 1 AMP/HR
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10.4 VOLTS @ 12 VOLTS
22.8 VOLTS @ 24 VOLTS
WIRE SIZE TO BATTERY SUPPLY AWG # 10 TO 10 FEET
AWG # 8 MAXIMUM 25 FEET
FUSE:
15 AMP MAX MUST BE INSTALLED AT BATTERY
SERVICE NOTE: The BD is intended to operate with the cover in place. When
monitoring operating with gauges, be sure to block off the top and front with cardboard
and tape to maintain proper airflow to the condenser.
WATER COOLED MAINTENANCE
Drain all water from the pump, sea strainer, hoses and water coil in the BD housing
when entering a freezing climate. Switch off the pump to avoid dry pump operation.
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TROUBLESHOOTING
A light emitting diode (LED) is connected between terminals + and D. In case the
electronic unit records an operational error, the diode will flash a number of times. The
number of flashes depends on what kind of operational error was recorded. Each flash
lasts 1/4 second. After the actual number of flashes there will be a delay with no
flashes, the sequence for each error recording is repeated every 4 seconds. Flashes
will only occur in the fault mode with the system on.
OPERATIONAL ERRORS SHOWN BY LED
Number of
flashes
5
Error type
Thermal cut-out of electronic unit (If the refrigeration system
has been too heavily loaded, or if the ambient temperature is high,
the electronic unit will run too hot).
4
Minimum motor speed error (If the refrigeration system is too
heavily loaded, the motor cannot maintain minimum speed 1,850
rpm).
3
2
1
Motor start error (The system is overcharged).
Fan over-current cut-out (The fan is defective).
Battery protection cut-out (The voltage is outside the cut-out
setting. Low voltage.)
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AVAILABLE OPTIONS
Remote Thermostat Panel Kit
Speed Control Panel Kit
Speed Control with Remote Thermostat Combination Panel Kit
Electronic Thermostat Thermometer Panel Kit
Remote Dial Thermometer
4" Vent Hose
4" Vent Grill
Ice Tray Kit
Bulkhead Mounting Brackets
Bin Lid for Freezer Bin
Water Cooling Option
Water Pump
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Our Repair Policy
Your Sea Frost BD system is manufactured to the highest standards and thoroughly
tested. If you experience problems with your system requiring technical service, return
it to us freight prepaid.
When a system is returned to us we will fix manufacturing defects and failures occurring
in normal operation for one year from the date of purchase at no charge, and return it to
you freight prepaid (surface freight) anywhere in the continental United States.
Installation damage and damage to the electrical parts will be favorably considered
however this damage is not our responsibility.
Improper wiring, improper voltage, corrosion, and water damage are not considered
manufacturing defects. It is your job to install and maintain your system in a reasonable
manner to prevent possible problems.
Proper installation and reasonable care will give you many years of excellent operation.
Please notify us before returning your system for repair.
SEA FROST
372 ROUTE 4
373 BARRINGTON, NH 03825
(800) 435-6708 (603) 868-5720
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