Proheat A4 - Manual (Page 24)

PROHEAT AIR A2/A4 INSTALLATION MANUAL 2-14
Fuel Line Installation
• The hose must be cut even, without burrs or deformation. The ends must be
pushed close to each other inside the connection hose to prevent air bubbles.
• The fuel line from the pump to the heater must incline directly to heater
(refer to figure 22).
2.9.2
Fuel Pick-Up Tube Installation
• Identify a location for the hole in the tank where the fuel pick-up is
protected (center of tank is recommended).
• Fuel pick-up to be installed in a hole drilled into the fuel tank with a step
drill (refer to figure 19).
• Determine the depth of the fuel tank at the desired fuel pickup location.
• Cut pick-up tube 3" (76 mm) to 4" (101 mm) from bottom of tank
• Bottom of pick-up must be cut at a 45° angle.
• Tighten stand pipe until secure
2.9.3
Figure 18. Hose Connections.
CAUTION
DO NOT connect to the vehicle
return line.
Figure 19. Fuel Pick-Up
DRILL 5/8" (16 mm) HOLE
NUT WASHER
PICK-UP
GASKET
CAUTION
To prevent fuel system contamination
DO NOT allow drill chips to fall into
the fuel tank when drilling the hole.
WARNING
Drilling the fuel tank may not be
acceptable in some jurisdictions.
DO NOT drill the fuel tank on
passenger carrying vehicles such
as school buses.