Proheat A4 - Manual (Page 16)

PROHEAT AIR A2/A4 INSTALLATION MANUAL 2-6
2.6.1
2.6.2
EXHAUST PIPE INSTALLATION
The exhaust pipe directs combustion exhaust gas away from the heater.
The exhaust pipe tip must be clear of the underside of the vehicle to prevent
combustion gas from re-entering the cab.
General Considerations
Point exhaust toward rear of vehicle and angle tip down slightly to prevent
build up of snow or mud (refer to figure 10).
Maintain a slight downward angle away from heater, if this is not possible,
drill 1/8” holes at the lowest points to allow moisture from combustion to
drain out (refer to figure 11).
Ensure exhaust pipe tip is clear of rear or side of cab to prevent buildup of
gases beneath vehicle.
DO NOT allow exhaust pipe to touch painted or other heat sensitive material
such as hoses or wiring.
Secure exhaust pipe with P clamps to prevent vibration and rattles.
Installation
Test fit the exhaust pipe and select the shortest route to clear the rear of
the vehicle.
If necessary, shorten exhaust pipe at the heater end by cutting with a hack
saw, do not use shears or snips as they will distort the exhaust pipe and may
cause leaks.
Locate position of P clamps and mark for drilling if required.
Secure the exhaust pipe to the heater using the supplied clamp and tighten
the P clamp(s).
2.6
Figure 10. Exhaust Pipe Direction.
WARNING
Exhaust gases must not enter the
vehicle interior. Direct exhaust
pipe away from vehicle.