Airxcel AHE-125-DN1, Руководство по установке, Страница: 23 / 35

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©Aqua-Hot®
125DN Installation Manual REV 220419
©Aqua-Hot®
125DN Installation Manual REV 220419
p. 43 p. 42
Fuel Supply
Fuel System Requirements
• The diesel fuel supply should be drawn directly from the
vehicle’s main fuel tank if applicable. A separate fuel tank
may be installed if necessary.
• The fuel tank should be equipped with a dedicated fuel
pick-up pipe.
• Use the provided 5mm x 1mm fuel line with the included
couplers and clamps.
• The fuel line must be kept as short as possible. The total
length of the fuel line should not exceed 39 feet.
• The fuel line should be laid out as flatly as possible, avoiding
extreme rises in height to eliminate any air traps.
• Make sure the fuel standpipe does not impair the operation
of the vehicle’s fuel delivery or fuel gauge in any operating
mode.
• The fuel standpipe must be positioned vertically and the
end should sit at least 1 in above the tank bottom.
• The high altitude bypass is installed to regulate the fuel
pressure when the RV is at altitudes above 5,000 ft. This
allows for proper burner operation, less carbon build-up,
and less emissions.
Fuel Standpipe Installation
1. Drill a 1 in hole through the top of the fuel tank.
2. Remove sharp pieces and smooth edges with sandpaper
or an emery cloth.
3. Determine the length of the standpipe so the end is at least
1 in above the bottom of the fuel tank.
4. Cut off excess standpipe at a 45° angle, remove any sharp
edges.
5. Loosely assemble parts.
6. Place sealing compound on the threads of the compression
fittings and thread onto the tank boss. Tighten the
compression fitting completely.
7. Place the standpipe into the tank hole at an angle. Slip one
side of the tank boss inside the hole.
8. Bring the standpipe up vertically and insert the other side
of the tank boss through the tank hole.
9. Center the standpipe in the fuel tank hole.
10. Pull up on the standpipe and tighten in place with the
clamping nut. Do NOT over-tighten the nut to prevent the
rubber washing becoming distorted.
Fuel Standpipe
Fuel Supply
NOTE:
The end of the fuel standpipe
must be a minimum distance of 1 in from
the bottom of the fuel tank.
Vehicle Fuel Tank
Figure 90
Fuel Supply
Failure to follow instructions on the fuel delivery system can
cause damage to the Aqua-Hot 125DN, the diesel burner, or
the RV. It may cause serious personal injury. Please follow
instructions carefully.
Fuel System
Fuel Lines Requirements
• Please refer to the example diagram shown above.
• Use the provided 5mm x 1mm fuel line with the included
couplers and clamps. Reference Figure 92.
• The fuel line should not be descending from the fuel pump
to the burner - see Figure 91.
• The fuel line should be properly secured to avoid sagging.
• The fuel line must be installed in a manner that won’t cause
damage to the fuel line (i.e. close to exhaust).
• The fuel line must be secured to the connections by hose
clamps.
• The fuel line should be mounted and secured with hose
clamps. The hose clamp must be tightened so that the two
tabs on the clamp touch each other.
• The fuel line must be only steel, copper, rubber, or plastic
lines made of plasticized, light, and temperature-stabilized
PA 11 or PA 12.
• If more fuel line is needed, an Aqua-Hot Fuel Line Kit is
available for purchase (PLE-125-FL1).
Do NOT use bio-diesel with the copper fuel lines. Doing so will
result in damage to the burner and fuel system. Please follow
instructions to ensure safe operation. Always check for any
fuel leaks before operating the burner.
Fuel Filter
• A fuel filter should be installed to ensure that clean fuel
is delivered to the burner at all times. The fuel filter type
should be 25-30 microns.
• Make sure the fuel filter is installed in an accessible area,
so it can be replaced during service.
• The filter can be mounted vertically or horizontally; note the
installation position and direction of flow (see Figure 96).
Fuel Pump
• The fuel pump is a combined pumping, metering, and shut-
off system. It pumps fuel from the vehicle supply to the fuel
connection piece to the burner via the fuel lines.
• The High Altitude Bypass is installed with the fuel pump for
use in altitudes over 5,000 ft.
• Fuel Pump is required to be installed horizontally. It is not
recommended to mount the assembly rotated 180° (see
Figure 93).
Figure 91
2
1 4
3
5 6
8
9
7
5
1. Fuel Line Coupler
2. High Altitude Bypass
3. Fuel Pump
4. Fuel Filter
5. Fuel Line
6. Max Delivery Height (6) = 9’9”
7. Max Delivery Length (6 + 7) = 28’ 3”
8. Max Suction Length (8 + 9) = 9’9”
9. Max Suction Height (9) = 3’ 3”