Seafrost Model BD Refrigerator AIR 1/1/2010

Seafrost Model BD Refrigerator AIR 1/1/2010
148 OLD CONCORD TURNPIKE BARRINGTON, NH 03825 USA TEL (603) 868-5720
FAX (603) 868-1040
E-Mail:[email protected]
1-800-435-6708
www.seafrost.com
SEA FROST BD 12 OR 24-VOLT D.C.
AIR-COOLED SYSTEM
CONDENSING UNIT LOCATION AND MOUNTING
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.
1
An un-ducted unit in a poorly ventilated small space will heat the air, lowering the
cooling capacity and possibly causing damage by overheating the compressor.
Service access and installation requires that the front, left end (inlet) and back
(condenser) air outlet be exposed. A duct hose will require 4 inches of clearance past
the end of the cabinet.
Mount the Sea Frost BD level with the compressor at the bottom. The BD may be
platform mounted. Two holes have been drilled through the bottom for screw mounting
to a shelf or bulkhead. If using the bulkhead mount bracket kit, follow directions
supplied with the kit.
INSTALLATION REQUIREMENTS FOR CONDENSING UNIT
* Never block the air inlet or the outlet.
* Provide for driest, coolest air for intake.
* Total air duct length for intake should not exceed six feet.
* Make sure the installation location is vented to allow warm discharge to escape.
* For intake through a finished panel, order black flange grill.
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 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.
2
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 parts, which may require service. 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
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 selftapping 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.
3
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!
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. 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 module. Connect a black wire from 12 or 24 volts negative to the (-)
terminal of the module.
Do not operate the BD directly from a DC charger without a battery.
4
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.
Warning! Do not use refrigerant with any additives, including but not limited to: oil,
dye, and leak stop.
STANDARD THERMOSTAT WIRING CONNECTIONS
Connect the thermostat wires to the yellow wire harness, which is connected to terminal
T & C 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 BD thermostat wires ~ copper and silver.
Remote (snowflake panel) thermostat wires ~ red.
Electronic thermostat thermometer (version 1) wires ~ green and white
Electronic thermostat thermometer (version 2 & 3) cat 5 data cable with RJ 45
connector. Install a 3-amp ATC fuse in the fuse holder on the Module PCB board. The
PBC board fuse is required only if using Electronic Thermostat with the RJ-45
jack.
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 thermostat 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.
5
OPTIONAL REMOTE THERMOSTAT OPERATION
Slide the bulb clip onto the edge of the plate and over the
sensing bulb. The sensing bulb must be in excellent
thermal contact with the plate. We recommend that the
probe be mounted on the plate in the 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. 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 (if necessary) to expose a black adjustment
screw about an inch into the case.
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.
6
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.
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.
OPERATIONAL INFORMATION
VOLTAGE
AMP/HR DRAW
12 D.C. or 24 D.C.
4.5 TO 6 @ 12 VOLTS
LOW VOLTAGE CUT OFF
10.4 VOLTS @ 12 VOLTS
22.8 VOLTS @ 24 VOLTS
AWG # 10 TO 10 FEET
AWG # 8 MAXIMUM 25 FEET
12-VOLT - 15 AMP STANDARD AUTOMOTIVE
24-VOLT – 7.5 AMP STANDARD AUTOMOTIVE
WIRE SIZE TO BATTERY SUPPLY
FUSE:
SERVICE NOTE: The BD is intended to operate with the cover in place. When
operating with a manifold gauge set, be sure to block off the top and front with
cardboard and tape to maintain proper airflow to the condenser.
7
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.
See additional trouble shooting information available at www.seafrost.com
OPERATIONAL ERRORS SHOWN BY LED
Number of
flashes
5
4
3
2
1
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.)
Minimum motor speed error (If the refrigeration system is too
heavily loaded, the motor cannot maintain minimum speed 1,850
rpm.)
Motor start error
A. (The system might be overcharged.) Has charge been added?
B. Faulty module.
C. This fault may also occur when the compressor is trying to start
a warm system or on initial start up on a new system. Several
attempts and then start up can be normal.
Do not let out refrigerant until first contacting Seafrost!
Fan over-current cut-out (The fan is defective.)
Battery protection cut-out (The voltage is outside the cut-out
setting. Low voltage.)
8
WIRING DIAGRAM
1. Electronic unit
2. Battery
3. Main switch (optional)
4. LED for operational errors
5. Fan
6. Thermostat
7. Resister for pre-setting
speed
8. Resister for pre-setting
Battery protection voltage
(optional)
9. Fuse (see electrical
connections
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 or from the date of first
usage/commissioning 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.
9
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement