HS Tarm 2000, Installation And Operation Manual

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O
PERATING
Y
OUR
B
OILER (continued)
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REGULAR STOKING OF THE BOILER
HINT: It is advantageous to have the wood that you are going to load ready and next to the
boiler before opening the by-pass damper. This will mean less smoke spillage into
the boiler room and less smoke up the chimney.
When re-stoking the boiler proceed as follows:
If The Draft Fan is
OFF
: (BOILER AT OPERATING TEMPERATURE)
CAUTION
: RISK OF WOOD GAS EXPLOSION as explosive gases may be present.
1. OPEN THE BY-PASS DAMPER.
2. NEXT, TURN THE TIMER on the control panel fully clockwise. This will activate the draft
fan, overriding the operation control to help prevent the risk of a gas explosion when the
door is opened. Let the fan run for 2-3 minutes to vent the hot gases.
NOTE: WHEN YOU ARE BURNING WOOD IN A TARM EXCEL, the operating aquastat
turns off the draft fan when the boiler gets up to temperature. This cuts the supply
of oxygen to the fire and the flame goes out. There remains, however, lots of hot
coals and a red hot refractory which will continue to bake the wood creating a build
up of hot gas in the firebox. Any person dealing with a Tarm EXCEL needs to keep
in mind that hot explosive gases may always be present. These gases are hot
enough to burn but without oxygen they can’t. If the draft fan is off for 15-20
minutes these gases will start to condense as creosote on the inner surfaces of the
firebox. However, if you open the load door when the gases are hot and explosive,
you may provide enough oxygen for a sudden back flash or puff (WOOD-GAS
EXPLOSION) to occur. This explains why you should
never open the load door
unless the fan has been running in the last few minutes to vent hot explosive
gases from the firebox first.
3. Turn the draft fan off by switching the power switch to “OFF/RESET” on the control
panel.
4. Without delay, open the loading door 3/4” with your left hand.
5. Wait approximately 20 seconds.
6. Open the loading door slowly, fully, and cautiously!
7. Load the firebox if the previous load of wood has burned down to low coals, placing the
wood uniformly front to back and tight together, not crosswise. If the wood has not
burned down to low coals, do not load more wood.
8. Close the loading door.
9. Turn the draft fan back on by switching the power switch to “ON” on the control panel.
10. Close the by-pass damper.
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