6 Pellet Feed Tube Thermostat
This is a built-in safety device, mounted on the pellet feed tube (on the top of the
burner) to automatically shut down the burner if the temperature on the pellet feed tube
(between the pellet auger and the burner) exceeds a safe level.
If this device should operate, it can be manually reset once the boiler and pellet feed
tube has cooled down.
To reset:
• Isolate the electrical supply to the boiler (set the switch on the fused spur to off).
• Remove the red burner cover by loosening the four M5 screws (two on each side
of the cover) and lifting it off the burner. The thermostat is located on the pellet
feed tube. Refer to Figure 6-1.
• Disconnect the lead from the thermostat terminals. Refer to Figure 6-2.
• Press the reset button located between the two terminals.
• Reconnect the lead. Ensure it is fully pushed on to thermostat terminals.
• Finally, refit the burner cover and tighten the four screws.
• Reconnect the electrical supply to the boiler and check operation.
NOTE
There is no power present on the two thermostat terminals when the lead has
been disconnected, so there is no risk of electrocution when resetting the
thermostat.
7 Priming the Auger
The pellet feed auger on the pellet hopper MUST be fully primed BEFORE attempting
to start the boiler. The auger should be initially primed by the Installer as part of the
commissioning process.
If for any reason the auger needs to be re-primed, this is a simple process using the
following procedure:
Step 1
First set the burner ON/STANDBY switch to the STANDBY position.
Step 2
Disconnect the pellet feed auger 6-way plug (3) from the upper socket on the left side
of the burner. Refer to Figure 7-1.
Step 3
Disconnect the 7-way plug (1) from the socket on the left side of the burner. Refer to
Figure 7-2.
Step 4
Disconnect the pellet delivery hose from the pellet feed tube (on the burner) and place
the open end into a DRY container of at least 1 litre capacity. Refer to Figure 7-3.
Step 5
Insert the 6-way plug (3) into the 7-way plug (1). Refer to Figure 7-4. It is not possible
to connect these two plugs incorrectly as they will only fit together one way. When
these plugs are connected the pellet feed auger will run continuously.
Step 6
Leave the auger running until there is a continuous flow of pellets from the pellet
delivery hose. This may take 15 to 20 minutes. The pellet feed auger is now fully
primed.
Figure 6-1: Location of pellet feed tube
thermostat
Figure 6-2: Disconnect lead from pellet tube
thermostat
Figure 7-1: Remove plug 3 from burner
Figure 7-2: Remove plug 1 from burner
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