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Combustion Air System
Fluid Expansion Bottle
Combustion Air System
The combustion air should not be supplied from living areas.
The air intake opening must not point in the direction of travel.
It also should be free from potential clogs from snow, debris, or
water.
NOTE: The air intake tube cannot be installed downward. A
water drain hole (Ø 2-5) is to be made at the lowest point.
The tube should be installed in a position that stays as cool
as possible and protected from splashing water.
•
Installation of air intake and exhaust system is shown in
Figure 24.
•
There is no air pressure difference between the exhaust
outlet or combustion air inlet.
•
The combustion air intake must be positioned in a way that
the intake will not terminate within the vehicle interior or
near the burner's exhaust pipe.
•
The air intake tube must be located in a cool place.
•
The combustion air intake must be positioned high enough
so splashing water cannot come into contact.
•
It must be positioned as to not become clogged with dirt
or debris.
•
It should not be able to draw in exhaust fumes.
•
It must be positioned away from the face of travel.
1
8
6
2
NOTE:
Should
this
particular
application
modification, please contact Aqua-Hot Heating Systems at
574-AIR-XCEL (574-274-9235) for further assistance.
p. 14
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
The combustion air intake may be installed in the same
compartment as the vehicle's fuel tank, but the air intake must
come from the exterior. The exhaust must be routed to the
exterior and any holes must be splash-proof.
Refer to the "Internal Combustion Engine Exhaust and Vehicle
Wall Openings" in RVIA's ANSI/NFPA 1192 Handbook for
Recreational Vehicle Standards, as well as the National Fire
Protection Association's (NFPA) 1192 Standard on Recreational
Vehicles for relevant information.
BURNER AIR CONNECTION
Combustion Air Connection
Figure 23
1 Burner
2 Air Inlet Pipe
3 Exhaust Pipe
4 Muffler
5 Exhaust Tail Pipe
6 7 Protective Hoods
8 Air Filter
3
4
5
require
The direction of the exhaust outlet must directed away from
any heat sensitive or highly flammable parts. Failure to do
so will result in a fire. Exhaust cannot be routed through the
interior of the vehicle, only the exterior. Failure to do so can
cause exhaust gas to leak inside the vehicle causing illness
and/or death.
The specifications and requirements must be followed carefully.
Failure to follow instructions may result in improper and unsafe
operation of the 125-GN1 and burner. Please comply with all
applicable legal requirements.
•
Do not direct exhaust downward, as fire may result when
the vehicle is near dry, grassy areas.
•
Exhaust must not terminate beneath the vehicle or beneath
a window or vent.
•
Ensure that the exhaust pipe is routed away from any
awnings or slide-out areas.
•
Position the exhaust pipe away and towards the rear of the
vehicle so the fumes naturally move away while the vehicle
is in motion and cannot permeate the interior of the RV.
Instructions
The exhaust pipe, with an inside diameter of 0.94in (24mm),
can be routed with several bends, total not to exceed 270°,
and a minimum bending radius of 2in (50mm). The total length
must not exceed 2.3' (700mm).
Exhaust Pipe - Stainless Steel
7
NOTE: Exhaust parts are at high temperatures when the
heater is operating. They shall be installed far away from
plastic parts and wires of the vehicle to avoid damage. The
Figure 24
air inlet pipe and exhaust pipe can freeze easily in working
conditions and should be checked regularly for obstructions.
Exhaust System
The exhaust pipe should be cut to form two sections: the
exhaust pipe and exhaust tail-pipe. The muffler will be installed
in the middle and fixed with the muffler holder. It may not be
fastened to temperature-sensitive vehicle parts. There should
be at least 0.8in (20mm) between the muffler, or exhaust, and
temperature-sensitive parts. Thermal insulation may be used
on the exhaust pipe.
It is recommended to route the exhaust pipe in a downhill slope.
If it is not possible, drill drain holes (Ø2-5mm) at the lowest
points.
The exhaust pipe opening should not extrude out past the
vehicle. The opening should prevent intake from the air inlet
pipe. The opening should be away from the direction of travel.
Rigid, stainless steel with a minimum wall thickness of 0.04in
(1mm) or flexible piping of the same material may only be used
as the exhaust pipe. The exhaust pipe is secured to the muffler
using supplied exhaust clamps.
Exhaust Outlet Requirements
•
The exhaust gas must be able to flow freely.
•
The exhaust outlet must not be clogged with snow or debris.
•
Exhaust outlet must not face in the direction of travel.
•
Exhaust fumes may not enter the interior of the vehicle via
windows, doors, or other openings.
•
The exhaust gas cannot be drawn in for the combustion air.
•
The exhaust opening may not be close to the ground.
•
If the vehicle has an under-body, the exhaust opening must
extend at least ⅜ in (10mm) past the vehicle.
•
The exhaust line must be secured with clamps (2 each) in
the proper locations.
BURNER EXHAUST CONNECTION
Figure 25
Exhaust Connection
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
Fluid Expansion Bottle
Exhaust System
Figure 26
p. 15
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