Unique UGP 13 - Operating the Refrigerator; General Operation and Start-Up

UNIQUE UGP 13
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General Operating Instructions
Importance of Leveling a Refrigerator
The refrigerator must be adjusted to a vertical position in both directions. In an
absorption refrigeration system, ammonia is liquefied in the finned condenser coil at the
top rear of the refrigerator. The liquid ammonia then flows into the evaporator (inside the
freezer section) and is exposed to circulating flow of hydrogen gas, which causes the
ammonia to evaporate, creating a cold condition in the freezer.
When starting this refrigerator, the cooling cycle may require up to eight hours of running
time to begin cooling before the cooling unit is fully operational, you can then begin
slowly loading the compartment.
The tubing in 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 not level, liquid ammonia will accumulate in 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 loss of cooling. Warranty will not cover
recharge/rebuild if caused by not running the fridge level.
This refrigerator operates only on LP Gas (Propane)
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 lines. We suggest
first turning off gas at the control panel, then the tank. This will reduce an air trap in the gas line.
Gas Operation
“Start Up” Procedure – see Figure #5 on next page for control panel.
1. Locate the control panel below at the bottom front of fridge.
2. Turn the gas shut off valve C to the ON position.
3. Turn thermostat button B fully clockwise (max), start to spark ignitor button A
before depressing the gas control button E, there may be a period of time required
for air to escape from the gas line and flow up to burner. Length of time will vary
Chapter
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