Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
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Section 7.3,
continue
d
Section 7: Troubleshooting
Continue Troubleshooting.
Q5:
Is the Diesel-Burner's Fuel Supply System
functioning properly?
Quick Check - With the Diesel-Burner ignited,
listen
for constant sputtering from the Hydro-
Hot's exhaust system.
A: If constant sputtering exists:
Continue Troubleshooting.
If constant sputtering does not exist:
Proceed
to Q6.
NOTE: Inspect the clear bowl of the Fuel Filter
for water. If water exists, be sure to purge the
Hydro-Hot's entire fuel system prior to replacing
the Fuel Filter. Attempt heater restart.
a. Clamp off and remove the Hydro-Hot's Fuel
Return
Line, reference Figure 1. Now attach
a short piece of fuel line to the Hydro-Hot's
Fuel Return Port and place the other end in a
con
tainer of diesel fuel. Remove the clamp
and ensure that the fuel line is completely
submersed in the fuel and then turn the Diesel
switch
ON. Are air bubbles visible in the
container of fuel when the Diesel-Burner is
operating?
A: If air bubbles are not visible:
Proceed
to Q6.
If
air bubbles are visible:
You will need to inspect the fuel
system
(supply side) for air leaks.
Therefore, be sure to perform the
inspections listed below until the air
leak
has been detected:
1. Inspect the fuel system (supply
side)
from the vehicle's fuel tank
to
the Diesel-Burner. Inspect the
fuel connections at the Hydro-Hot,
Diesel-Burner
, and at the vehicle's
fuel tank for looseness. Tighten if
necessary. Also, check that all
Fuel
Filter Head fittings are se-
curely tightened; see the "NOTE"
at the top left-hand side of the
following page.
2
1
4
3
output to
Hydro-Hot’s Fuel
"Supply" Port
input
from Fuel
Tank /
fuel pick-up
Fuel Filter
TOP VIEW:
of Fuel Filter Head
Plug
Plug
RETURN PORT:
from Hydro-Hot’
s
"Return" Port
SUPP
LY PORT:
to Hydro-Hot’s
Fuel Filter
dedicated
fuel pick-up
Fuel Pick-up Pipe Illustration
Section 7.3,
continue
d
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