Insulating the Flexible Exhaust Piping
The flexible exhaust pipe must be insulated prior to installation into the vent terminal housing. The flexible exhaust pipe connects to the flue tube of the refrigera- tor’s cooling unit and routes to the bottom opening of the vent terminal housing. Use the
Installing Refrigerator into the Enclosure
Set the refrigerator into the enclosure and slide it back enough to connect the gas supply piping to the manual
power cord to the receptacle. Place the "O" rings onto the ends of both flexible pipes. Bend the flexible pipes so they clear the top of the enclosure. Connect the piping as follows:
Exhaust Pipe - This pipe is insulated and connects to the flue tube of the cooling unit. Route and connect to the bottom opening of the vent terminal housing.
Intake Pipe - This pipe is not insulated and connects to the burner cover. Route and connect to the top opening of the vent terminal housing.
Secure both flexible pipes to vent terminal housing with locking washer and screw. Slide refrigerator com- pletely into enclosure.
Propane System
Testing of the Vehicle’s Gas Supply Piping
When installation is complete, the propane gas supply piping must be inspected and tested for leaks from the refrigerator to the main gas supply tank. Use a leak detection solution. Do not test for leaks with an open flame.
If compressed air is used for leak testing, the pressure must not exceed 1/2 psig (14 inches water column).
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressure in excess of 1/2 psig (14 inches water column).
The appliance must be isolated from the gas supply piping system by closing its manual shutoff valve during any pressure testing of the gas supply piping system at test pressure less than or equal to 1/2 psig (14 inches water column).
Check the gas pressure to the refrigerator without other gas appliances operating. The pressure should not exceed 11 inches water column. With other appli- ances operating the pressure should not be less than 10.5 inches water column.
Gas Burner Flame
The gas operation of the refrigerator is controlled by the correct burner flame which supplies the heat input to the refrigerator’s cooling system. The correct burner flame is dependent upon correct input gas pressure and the burner and burner orifice being clean. The propane gas piping and the supply pressure must be inspected and tested at least twice a year. All inspec- tions and tests must be performed by the propane gas supplier or a qualified service agency.
A visual check of the burner flame should be made regularly. The burner flame can be observed through the air inlet grille as shown in Figure 5.
Burner Flame |
Air Inlet Grille |
Figure 5
As illustrated in Figure 6, the flame should be sharp blue with a stable burning appearance. If there is a constant yellow component observed or if the flame appears erratic and unstable, perform the following inspection. Check the gas supply pressure to insure the pressure is between 10.5" W.C. min. - 11" W.C. max.. Inspect the Air Intake pipe between the burner and the vent terminal housing for obstructions. If the gas supply pressure is within specifications, and the Air Intake pipe is clear of obstructions, clean the burner, orifice, and cooling unit’s flue tube. Also observe the position of the flame; it must be centered under the flue tube without touching the inner wall of the tube.
Figure 6
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