Oasis Montana Inc.
Alternative Energy Supply and Design
406-777-4309 local line
Toll Free Order Line 1-877-OASISMT (877-627-4768)
e-mail: info@oasismontana.com
Home Page: www.oasismontana.com

Servel, Danby, Crystal Cold, Dometic, Peerless gas stoves, LP refrigerators, propane refrigerators, efficient refrigeration, lp refrigeration, propane refrigeration, gas refrigerators, Americana 400,  refrigerators, freezers, refrigerator/freezer, SERVEL, servel, backup, Montana

Importance of leveling a refrigerator

In an absorption refrigerator system, ammonia is liquefied in the finned condenser coil at the top of the rear of the refrigerator. The liquid ammonia then flows into the evaporator (inside the freezer section) and is exposed to a circulating flow of hydrogen gas, which causes the ammonia to evaporate, creating a cold condition in the freezer.

When starting this refrigerator for the very first time, the cooling cycle my require up to four hours of running time before the cooling unit is fully operational.

The tubing on the evaporator section is specifically sloped to provide a continuous movement of liquid ammonia, flowing downward by gravity through this section. If the refrigerator is operated when it is not level, liquid ammonia will accumulate in the sections of the evaporator tubing. This will slow the circulation of hydrogen and ammonia gas, or in severe cases, completely block it, resulting in a lose of cooling.

The refrigerator must be adjusted to a vertical position in both directions. Use the feet on the refrigerator to adjust its positions.

Gas operation

  1. To start the refrigerator, turn the knob (A) to the "GAS" position.
  2. Turn the thermostat knob (B) to the setting 4.
  3. Push button (C) in until it bottoms out - and hold. While holding button (C), push button (D) for the piezo ignition  several times to light the burner. This can be observed through the flame view port (E).
  4. After the flame lights, continue to hold the button (C) for an additional  ten (10) seconds. Release button (C) and check flame view port (E) to make sure the burner does not go out. If the burner goes out, repeat the lighting procedure steps 1 through 4.
  5. To shut off the refrigerator, turn the knob (A) to the "OFF" position.

NOTE: After changing an LP tank, or after a long shut off period, the gas line is likely to be filled with air. You may have to repeat the lighting procedure several times to purge the air out of the gas line.

Electric operation

  1. Check to be sure that the power cord is properly connected to the power supply.
  2. Turn knob (A) to the position marked "ELEC" for 120 volt AC operation.
  3. Turn the thermostat knob (B) to setting 4.
  4. To shut off the refrigerator, turn the knob (A) to the "OFF" position.


The refrigerator is equipped with a thermostat that can be adjusted to turn the knob (B) to a different setting to maintain the desired cabinet temperature.

  • "OFF" Setting of the Thermostat: In gas operation, the thermostat closes its main valve and the burner runs continuously at the bybass rate or pilot. In the electric operation, the contacts in the thermostat are open and the heating element is off.
  • "MAX" Setting of the Thermostat: In gas operation, the thermostat allows the burner to remain in the high flame continuously . In the electric operation, the heating element is "ON" continuously.
  • The Thermostat can be adjusted between "MAX" and "OFF" to obtain the desired cabinet temperature. The closer the knob is to "MAX" the colder the cabinet temperature. The closer the knob is to "OFF" the warmer the cabinet temperature.

When the thermostat reaches the set temperature, it will cut the burner back to bypass or, in the electric operation, shut off the heating element. The setting of the thermostat is not critical, but we recommend it be adjusted to maintain a dry frost on the cooling fins. Adjust the thermostat knob closer to "MAX" when the outside temperature becomes warm.