Thetford N300 - Manuel (Page 4)

Installation and Owner’s Manual 4
The thermostat [96] (See Art00976) changes the amount
of propane gas that goes to the burner. This acts as the
temperature control of the refrigerator. Number 5 is the coldest
temperature setting.
When the outside air temperature is below 50° F, the refrigerator
may have a tendency to freeze food at the colder temperature
settings. To reduce the tendency to freeze food:
- Turn the thermostat to a warmer temperature setting.
- Keep the refrigerator full.
- Put foods that are more likely to freeze on the lower shelf.
The selector switch [207] changes the energy source of the
refrigerator between propane gas ( ), AC electric ( ), DC
electric ( ), and OFF ( ).
The gas safety valve [91] is built into the control panel. As long
as a flame is present, the valve is open and allows propane gas
to flow into the burner. Any loss of flame (empty gas tank, blow
out, etc.) closes the safety valve and stops the flow of gas.
The piezo igniter [216] makes a spark which ignites the flame in
the burner.
The flame meter [217] shows if a flame is present in the burner.
Ignition - propane gas operation:
1. Open the valve at the gas storage tank.
2. Turn the thermostat to the 5 position.
3. Turn the selector switch to the propane gas position ( ).
4. Push and hold in the safety valve and push in the igniter
several times in rapid succession, for about five seconds:
WARNING: Do not hold in the safety valve for more than
30 seconds. If there is no flame in this time, wait at least
five minutes before you try ignition again. If you continue
to hold in the safety valve, gas will collect in the burner
area. This could cause a fire or explosion and result in
dangerous personal injury or death.
- When a flame is present and the flame meter moves into the
green area, release the safety valve.
- If the flame meter does not move into the green area, do this
step again.
5. Turn the thermostat to the temperature setting that you wish.
!
Do a test of the gas safety valve:
With an established flame in GAS mode:
1. Close the manual gas shutoff valve [218] of the refrigerator
(See Art01254].
2. After the flame is extinguished, you should hear a sharp “click”
sound within three minutes.
NOTE: The gas safety valve should close with a sharp “click“
sound.
3. Open the manual gas shutoff valve of the refrigerator.
4. Without pushing in the gas control, push the igniter several
times rapidly in succession. The burner flame should not
ignite. This means that the gas safety valve is working
correctly.
Start up - AC operation:
- Make sure that 120 volts AC is available.
- Turn the selector switch to the AC position ( ).
- Turn the thermostat to the temperature setting that you wish.
Start up - DC operation (3-way models only):
- Make sure that 12 volts DC is available.
- Turn the selector switch to the DC position ( ).
DC operation precautions:
This refrigerator is made to operate on DC power while your
vehicle is “in transit” and AC power or propane gas sources are
not available. Operate the refrigerator on DC power only when
the vehicle engine is running.
For the refrigerator to operate correctly on DC power, the battery
must be maintained in a fully charged condition.
For the battery to be fully charged at all times during refrigerator
operation on DC, the vehicle engine must be running and the
battery charging system must be in good operating condition.
Keep in mind the following electrical precautions for DC operation
of the refrigerator:
- Good battery condition is necessary for correct DC operation.
- The capacity of the battery charging system must be more
than what is necessary for the refrigerator and other DC
appliances.
- While the vehicle engine is running, have a qualified service
technician make sure the voltage of the DC power supply
leads at the refrigerator is more than 11.5 VDC.