Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
R
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
After turning the Diesel switch ON:
TS4
: The Hydro-Hot's exhaust system sputters.
NOTE: Before proceeding to the following
procedures, be sure to check that the vehicle's
fuel tank has a sufficient level of fuel.
Q1: Is the Diesel-Burner's Fuel Nozzle func-
tioning properly?
In order to determine if the Fuel Nozzle is
functioning properly, reference Section 8.6
and
perform the Fuel Nozzle's "Component
Test".
A: If the Fuel Nozzle is not functioning
properly:
Th
e Fuel Nozzle must be replaced,
reference Section 8.6 for replace-
ment
instructions.
If the Fuel Nozzle is functioning properly:
Continue Troubleshooting.
Q2:
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.
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:
See the last "NOTE" in this section
(Section 7.4).
Section 7.4,
continue
d
Section 7.4
Section 7: Troubleshooting
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