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S
7: F
ECTION
UEL
CAUTION
A kinked fuel line (return side) will increase the fuel pressure to
hazardous levels and may cause a fuel line to rupture. A kinked
fuel line could also severely damage the diesel-burner's internal
fuel system.
Fuel Filter Location:
Mount the fuel filter assembly in a location that pro-
vides easy access for replacing the filter element and for
catching any potential fuel spillage when servicing.
Fuel System Requirements:
•
The diesel fuel supply should be drawn directly from the
vehicle's main fuel tank or from a separate auxiliary fuel
tank, if applicable.
•
The fuel tank should be equipped with a dedicated fuel
pick-up pipe (outlet port and inlet port). Reference
Figure 38.
NOTE: If an auxiliary fuel tank is required, be sure to consult
the ANSI/NFPA 1192 handbook concerning heating
systems' diesel fuel system specifications.
Also, be sure to reference the ANSI/NFPA 1192 hand-
book for information regarding fuel distribution system
specifications.
•
Use 3/8 inch I.D. (Internal Diameter) fuel lines.
•
The combined length of the supply and return fuel lines
should not exceed 100 feet in total length. Reference
Figures 39.
All fuel-fitting hardware (i.e., at the vehicle's fuel tank, fuel filter,
and Aqua-Hot fuel parts) must be 1/4 inch NPT or greater with a
3/8 inch barbed fitting. Fuel fittings less than 1/4 inch NPT may
restrict fuel flow, thereby compromising the diesel-burner's per-
formance
S
YSTEM
© 2011 Aqua-Hot
Fuel System Installation:
1.
Run two 3/8 inch fuel lines from the fuel tank inlet and
outlet ports to the Aqua-Hot.
Both fuel lines should be laid as flat as possible and any
extreme rises in height should be avoided in order to
eliminate any potential air-traps.
Run both fuel lines in areas where they cannot be
pinched, kinked, or damaged during normal operating
conditions.
Run the fuel tank outlet fuel line past the fuel filter loca-
tion in preparation for step 7.
2.
Be sure to secure all fuel lines where necessary and ap-
ply protective shielding in areas where chafing may oc-
cur.
3.
Label both fuel lines indicating whether they are an out-
going line or an incoming line.
4.
Connect the Aqua-Hot's fuel lines to the vehicle's fuel
tank. Reference Figure 38.
5.
Install and tighten the appropriate fuel fittings onto the
Aqua-Hot's fuel ports, as well as the two ports of the
fuel filter. Reference Figures 39.
6.
Connect the inlet and outlet fuel lines to the Aqua-Hot's
fuel port connections. Reference Figure 41.
7.
Cut the fuel line at the fuel filter mounting location and
connect the fuel lines as illustrated in Figures 40.
NOTE: Be sure that the flow of fuel through the filter is in the
correction direction as illustrated in Figure 40.
Figure 38
®
375-D Installation Manual
— Page 32 —
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