3
3
3
-
-
0
0
F
F
U
U
E
E
L
L
S
S
U
U
P
P
P
P
L
L
Y
Y
P
P
R
R
O
O
B
B
L
L
E
E
M
M
S
S
There are several problems relating to fuel supply of which you
need be informed.
WAXING - TRIM - ROLL
3-0-1. WAXING
1 Diesel has a nasty habit of waxing up when the temperature
gets down to or lower than freezing,
This waxing or thickening alters its flow characteristics and
consequently what was an adequate fuel feed supply can rapidly
turn into an inadequate one when the temperature starts to fall.
2 The worst scenario is fuel feed pipe 50-60 feet long in 8mm
dia pipe.
3 The best-case scenario is a fuel pipe 4 feet long in 15mm dia
with good insulated lagging.
3-0-2. (TRIM)
CHANGING OIL PRESSURE AVAILABLE AT THE
STOVE.
1. Because of the layout of a boat it is not possible to provide a
high pressure oil supply, in most cases a pressure head of out
18" is all that is available and as the tank empties this head of
pressure will reduce, and may alter the flow characteristics of
the fuel.
2. In some cases this head can also be affected by the ballast or
trim of the boat, the changing level of the boat due to addition
removal of ballast, fuel or water can have an effect on the
position of the oil tank in relation to the stove and the angle at
which the oil line is established.
3. Take great care to monitor all the effects of the different
ballast and trim possibilities.
4.Make sure that adequate oil feed is always available at the
outlet end of the fuel pipe before it enters the oil control valve
at the stove.
5. THE BOAT MUST NOT BE EXPOSED TO TRIM
ANGLES IN EXCESS OF 0.75 DEGREE’S.
3-0-3 POOR OIL FLOW PROBLEMS.
1. Bubble stoves have a very accurate oil flow control valve,
which is set up to give a precise oil flow at high and low fire.
3. For example the stove is flow rated at 3cc per minute on low
fire and 6cc per minute on high fire.
a. The test flow through the supply pipe should be well in
excess of the maximum flow rate of 6cc’s even when the
temperature is below freezing and the boat is adversely
trimmed.
3-0-4. OIL FEED SET UP
1. If the stove is fitted forward at the bow end of the boat, to
keep the oil feed supply as short as possible, a forward mounted
oil tank is recommended.
3. The tank should have insulating material around it for
protection from the effects of cold weather.
4. Always add a suitable proprietary antifreeze additive to the
stove fuel for wintertime running.
5. The tank should have conveniently sized filler and it must be
vented.
6. The tank should have-:
6-2. An isolation valve before an easily replaceable cartridge
filter and another isolation device close to the appliance to
allow for easy servicing.
3-0-5 OIL LINE
1. The oil feed line starts after the fuel filter and proceeds
to the point of entry, where the oil line goes into the
cab of the boat, at this point there will be a remote
sensing fire valve which is designed to shut off the oil
supply should a fire occur near to the stove.
2. The sensor for this valve should be fitted at roof level
in the space where the appliance is fitted.
There is a second valve provided with the stove, which is, pre
fitted at the oil entry to the oil control valve.
This one is designed to shut the oil supply off should the flame
be blown out and is known as a (Flame failure device) ffd.
Both valves have reset reset buttons, which allow you to re-
cock them should they trip off.
If the stove is fitted with a Teddington KBB valve, press the
little black button to re cock the valve.
ISOLATION VALVE
5. If the bubble stove is fitted up to the first bulkhead the
isolation valve may well be fitted outside the cabin or saloon of
the boat and you should make sure that you know where it is
and how to operate it.
6. Because of the high risk of fuel contamination with water, we
strongly recommend the fitting of a high volume water trap in
the oil supply line. We have had to attend breakdowns on
several occasions where the diesel tank has had 50% water
contamination.
7. If there is a water trap fitted, make sure that you are fully
familiar with its operation and service requirements.
8. In case of emergencies, a suitable and serviceable fire
extinguisher should always be readily accessible near to the
appliance.
4
4
-
-
0
0
H
H
O
O
W
W
I
I
T
T
W
W
O
O
R
R
K
K
S
S
1. The stove generates heat from burning oil mixed with air in a
vaporizing pot located in the bottom of the stove.
3. Once the stove is ignited, oil goes into the pot at a steady and
controlled rate via gravity flow, metered by the OIL
CONTROL VALVE the oil flow can be controlled from
minimum to maximum or any setting in between determined by
where you set the oil flow control knob.
Note. Stoves with boilers fitted will have an extra automatic
control for the water temperature. See the booklet provided
with the stove for more info on how this operates.
4. Air is sucked into the pot by the natural action of the
negative pressure in the chimney and to allow the chimney to