Specifications

WPOperatingManual Page - 19 - Revised: August 12, 2009
pushed in. The oven door should remain open at all times when the broiler is being used. If the oven
door is closed when the broiler is on a severe fire hazard is created.
3. Refrigerator
(a) General
There are two independent refrigeration systems on the boat. The original system is a Sea Frost Freezer
Plate system with the system compressor operating off the auxiliary engine. A second system, the
Evaporator System, has a compressor that operates off of the ship’s batteries. When the engine is
running it may be wise to run the Freezer Plate System since it uses very little engine power and will
reduce the amount of battery power used by the Evaporator System.
(b) Sea Frost Freezer Plate System
The refrigerator compressor runs off the engine much like the compressor for the air conditioner in
your car. However, for the refrigerator to be cooled, in addition to having the engine running at a speed
of at least 1200 rpm and not more than 2100 rpm, the timer located on the front of the refrigerator must
be activated. A red light will indicate that the compressor is cooling the refrigerator. As the compressor
runs it cools a liquid salt in the cooling plate until it is frozen at about 10º F. This frozen salt has the
same effect as a block of ice. As it absorbs heat from the refrigerator compartment the salt melts until it
has turned back into a liquid again. Then the engine must be run and the compressor activated to freeze
the salt again.
(c) Evaporator System
The evaporator system compressor is run off of the 12 volt electrical system. The compressor is
located under the galley behind the trash container. There is a circuit breaker that turns the compressor
on. The Freon exiting the compressor flows to a cooler that is attached to the external hull via a thru
hull fitting located in the bilge just aft of the bulkhead leading to the forward cabin. This system
operates similar to a standard household refrigerator. An evaporator plate is in the freezer
compartment. The operation of the compressor is controlled by a thermostat that senses the
temperature in the compartment and turns the compressor on when the temperature rises above a set
point. The set point is established on the controller located just in front of the galley sink. The set point
should be maintained at 15ºF. A digital readout shows the actual measured temperature in this
compartment.
This system uses about 4 amps of electricity. This presents a substantial drain on the house battery
system. If the system is operating it is imperative that a source of electricity be provided to the
batteries either through the wind generator, the tow behind generator, the engine alternator or the
battery charger plugged into a 120 volt AC source. If a source of electricity is not provided, the house
batteries will be completely drained in less than 48 hours.
(d) Refrigerator Compartment
A fan in the barrier wall between the freezer compartment and the refrigerator compartment pulls cold
air from the freezer compartment into the refrigerator compartment. This fan is controlled by a
thermostat that should be set to maintain the temperature in the refrigerator between 35º and 45ºF. This