Eberspächer Hydronic D4 Installation Manual - page 15
Exhaust and Combustion air system
14
1
Fuel system
15
1
The fuel system supplied comprises of a fuel standpipe,
shut off valve, a quantity of fuel line, connectors and a
fuel-metering pump (integral on the Hydronic D4 / D5 SC
heater models).
Figure 11 illustrates a typical installation using a fuel
standpipe, which is the preferred method for the fuel
take off. This minimises any problems caused by over
pressuring, fuel starvation and air leaks that can occur if
connected to an engine fuel line.
Installing the standpipe
The fuel standpipe supplied must only be fitted to the top
of the fuel tank and on an even surface.
It must not be
fitted to the side or bottom of the tank.
Install the standpipe as shown in Figure 11.
Positioning the fuel-metering pump (if applicable)
24 volt Hydronic D4 / D5 only
When installing the fuel-metering pump, take into
consideration that it may be audible when in operation,
so it should be installed into an area or onto surfaces
that will not transmit the sound into the accommodation.
The chosen area should also be free from excessive
moisture and the fuel-metering pump must be mounted
with the electrical connections/pressure side uppermost
within the permissible angles shown.
5
Ø 25mm
25mm minimum from bottom of tank
15º
35º
Tighten to compress rubber washer,
but do not overtighten
When connecting fuel pipes with a fuel hose (ISO 7840)
always mount the fuel pipes in a butt joint to prevent any
bubbles from forming.
1 Correct connection.
2 Incorrect connection - bubble formation.
Figure 12
Figure 11
Figure 13
Cut and debur to 45°