Installation Notes

PARKING AIR HEATER
21
Connection to heater
Fuel Supply System
Pressure Height of Fuel Pump
1.Fuel Tank 2.Fuel Filter 3.Fuel Hose 4.Fuel Pump
1.Fuel Pump
2.Max. Fuel Level
3.Min. Fuel Level
4.Connection to Heater
-Preferred installation position in range 30° to 45°
Fig.16
Fig.17
5.3 Installation of Fuel Supply System
5.3.1 Fuel pump
The fuel pump shall be mounted in a protective rubber
clamp to reduce vibration, with its outlet tilting upwards.
For the preferred installation position see Fig. 17, above.
When conditions permit, the fuel pipe between the fuel
pump and the heater should run at a gradual upward
slope.
5.3.2 Pressure height of fuel pump
The difference in elevation between the level of the fuel
itself and the fuel pump, as well as that between the fuel
pump and the fuel inlet, can create pressure (or suction) in
the fuel pipeline (See Fig. 16). Therefore, these dimensions
shall conform to the following requirements : a <= 3m; b <=
0.5m; c <= 2m. Note: this is ONLY applicable for the split
heater model (MXR-1F).
During installation, please check the vent hole on the fuel tank cap.
Please install in accordance with the arrow on the fuel pump. Do
NOT install upside down.
4
1
3
2
≤6000mm
≤2000mm
max45°
min30°
2
4
1
3
0°
a
c
b
PARKING AIR HEATER
22
Fig.18
5.3.3 Fuel line
5.3.4 Installation of fuel filter
A fuel filter should be installed in front of the fuel pump’s
fuel inlet. Ensure that this correctly follows the fuel flow,
positioned at an angle of exactly 90°, in conformity with
Fig.18, The fuel filter should be replaced every 6 months,
as should be the fuel pipe fittings and clamps.
90°
A sharp knife must be used to cut fuel hoses and pipes
to length. Their Interfaces must not be crushed and
must be free of burrs.
The fuel pipe from the fuel pump to the heater should
be routed to rise continuously.
Fuel pipes must be fastened safely to avoid damage
and/or noise production due to vibrations (with a
recommended clearance of approx. 50 cm).
Never route or fasten the fuel pipes to the heater or
vehicle exhaust system. At crossings, always ensure
adequate heat clearance.
Dripping or evaporating fuel must not collect on hot
components or be liable to ignition by electrical
systems.
When connecting fuel pipes with a fuel hose, always
mount the fuel pipes in a butt joint to prevent the
formation of any bubbles.
Hose clips must be used to secure all fuel supply hose
connections.
Components carrying fuel must be protected from heat.
Fuel pipes must be protected from mechanical damage.