Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
R
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
vehi
cle's fuel tank for looseness.
Tighten if necessary. Also, check
that
all Fuel Filter Head fittings
are
securely tightened, see the
"NOTE" below.
NOTE: Be sure to check that each fitting at the
Fuel Filter Head contains thread sealant. A
fitting without thread sealant could result in an
air leak. Be sure to clamp off both fuel lines at
the filter head prior to any fitting removal. If
fittings are removed and reinstalled, be sure to
remove both clamps prior to attempting a
heater restart. Failure to do so could result in
serious damage to the Diesel-Burner's Fuel
Pump.
2. Once the potential air leak has
been
discovered and corrected,
reattach the Hydro-Hot's Fuel
Retu
rn Line and attempt heater
restart. Does the Hydro-Hot's ex-
haust system still sputter?
If
the exhaust system is still sputtering:
Perform
the air leak inspections
again,
until all air leaks have been
discovered
and corrected.
NOTE: If the Hydro-Hot's exhaust system still
sputters after performing all of the listed checks,
contact our Technical Department at 1-800-685-
4298 for additional assistance.
Section 7.4,
continue
d
Section 7: Troubleshooting
Section 7.4,
continue
d
Page 26
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