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105843
PORTABLE FORCED AIR HEATERS
D20N, D30N AND D44N MODELS
ASSEMBLY
These models are furnished with wheels and
handles. Wheels, handles, and the mounting
hardware are found in the shipping carton.
TOOLS NEEDED
• Medium Phillips Screwdriver
• 3/8" Open or Adjustable Wrench
• Hammer
1. Slide axle through wheel support
frame. Install wheels on axle.
IMPORTANT:
When installing wheels,
point extended hub of wheels toward
wheel support frame (see Figure 3).
2. Place cap nuts on axle ends. Gently tap
with hammer to secure.
3. Place heater on wheel support frame.
For D20N model, make sure outlet end
(front) of heater is over wheels. For
D30N and D44N models, make sure air
inlet end (rear) of heater is over wheels.
Line up holes on fuel tank flange with
holes on wheel support frame.
4. For D20N model, place rear handle on
top of fuel tank flange. For D30N and
D44N models, place front handle and
rear handle on top of fuel tank flange.
Insert screws through handle(s), fuel
tank flange, and wheel support frame.
Attach nut finger tight after each screw
is inserted.
5. After all screws are inserted, tighten
nuts firmly.
Figure 3 - Wheel and Handle Assembly
Handle
Sleeve Cap Screw
Hot Air
Outlet
Air
Inlet
Wheel Support
Frame
Wheel
Fuel
Tank
Flange
Cap Nut
Nut
Extended
Hub
Axle
Screw
Wheel
Support
Frame
Wheel
Cap Nut
Nut
Extended
Hub
Front
Handle
Axle
Rear
Handle
Air
Inlet
Fuel
Tank
Flange
Hot Air
Outlet
D20N Model
VENTILATION
WARNING: Follow the mini-
mum fresh, outside air ventilation
requirements. If proper fresh, out-
side air ventilation is not provided,
carbon monoxide poisoning can
occur. Provide proper fresh, out-
side air ventilation before running
heater.
D30N and D44N Models
Provide a fresh air opening of at least 2800
square cm (three square feet) for each
100,000 Btu/Hr rating. Provide extra fresh
air if more heaters are being used.
Example:
A 150,000 Btu/Hr heater requires
one of the following:
• a two-car garage door [4.9 m (16 ft.) open-
ing] raised 9 cm (3.5 inches)
• a single-car garage door [2.75 m (9 ft.)
opening] raised 15.25 cm (6 inches)
• two, 76 cm (30 inch) windows raised 28
cm (11 inches)