SPACE HEATER SMALL (SHS)
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
Rain cap assembly (1). The rain cap assembly (1) is installed on the top of the nested stack assembly
(2) to prevent down-drafts from entering the heater during operation. It also prevents rain, leaves, and
other debris from entering the stack. Guy lines (3), secured to three wire ropes (4), are secured to loops at
the corner of the tent and act to stabilize the entire stack assembly (2) in an upright (vertical) position
during heater operation.
Stack assembly (2). Consists of six pipe sections (middle sections not shown) of decreasing diameter.
When assembled, the sections form a slightly cone-shaped stack with the largest diameter section at the
base and the smallest diameter at the top. Each section is flanged on its smaller end in order to fit into the
next higher section and stamped with a number for easy identification. The stack assembly (2) seats in
the stack adapter (5), allowing combustion gases to discharge outside the tent during operation. When
disassembled, the sections fit inside each other and on either side of the burner for storage.
Fuel Tank (6). The fuel tank (6) stores enough fuel for up to six hours of operation. The fuel cap (7) is
removed to allow refueling.
Primer Bulb (8). The primer bulb (8) consists of a long slender tube with a rubber squeeze bulb. The
primer bulb is used to extract a small amount of fuel that is injected into the burner and used to prime the
heater at start-up.
Air Vent/Primer Port (9). The air vent/primer port (9), located on the top of the fuel tank (6), is opened
during operation to allow air into the fuel tank (6). The air vent/primer port (9) can also be removed to
allow the primer bulb (8) to extend down into the fuel tank (6) to acquire a small of amount of fuel for
Lid Assembly (10). The lid assembly (10) fits onto a circular opening on the top of the heater body. The
built-in sight glass (11) allows the user to monitor the burner flame and permits access to the burner down
tube assembly (12) when igniting liquid fuel. Two pot supports (13) rotate outward to allow a cooking pot
to be placed on top of the lid assembly (10) for warming food. The lid assembly is secured to the top of
the heater body by two latches (14) located on either side of the heater body.
Burner Shell Assembly (15). The burner shell is the area of the heater where combustion occurs. The
burner shell consists of a perforated burner shell (16) and up-tube (17) which is welded into the base of
the burner shell (16). It permits fuel vapors to flow into the down-tube assembly (18) during operation.
Down-tube Assembly (18). The capped down tube (18) is positioned over the up-tube (17) and is
removable through the lid assembly (10). During operation, fuel flows into the up-tube (17) where its level
is gravity-maintained with the regulating float valve (19).
Regulating Float Valve (19). Controls the amount of fuel being delivered to the burner by utilizing gravity
feed. As the height of the float regulating valve is changed via the burner rate control (20), the amount of
fuel being delivered to the burner will increase or decrease accordingly.
Burner Rate Control (20). The Burner Rate Control (20) regulates the amount of fuel flowing to the
burner by moving the regulating float valve (19) up and down.
Fuel Shut-off Valve (21). The fuel shut-off valve (21) controls the flow of fuel from the fuel tank (6) to the
regulating float valve (19).