Fuel Tanks; Air/Exhaust System; Ambient Conditions; Ventilation - Clarke C18H Instruction Manual

Electronic variable speed engines for fire pump applications
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Figure #13 – Primary Filter Assembly

3.1.4 Fuel Tanks

Keep the fuel tank filled to reduce condensation to a
minimum. Open drain at the bottom of the fuel tank
once a week to drain off any possible water and/or
sediment. Fill tank after each test run.
Note: Per NFPA 25 standards, the fuel tank level must
never be less than 67% of its capacity.
Maximum Allowable Fuel Head above Fuel lift pump,
Supply or Return.
Engine model
feet
C18H
15.0

3.2 AIR/EXHAUST SYSTEM

3.2.1 Ambient Conditions

Clarke engines are tested in accordance with SAE
J1349 (Clarke USA) or ISO 3046 (Clarke UK). In this
capacity, they may be de-rated to meet certain site
conditions, failure to do so can seriously impede the
performance of the engine and could lead to premature
failure.
meters
4.57

3.2.2 Ventilation

The engine must be provided with adequate ventilation
to satisfy the requirements of the combustion system,
radiator cooling systems where fitted, and allow
adequate dissipation of radiated heat and crankcase
emissions. For all this data refer to Installation &
Operation Data (see Page 5). This data can be used for
proper sizing of inlet and outlet louvers.

3.2.3 Standard Air Filter

The standard air filter is a reusable type. Should a
situation occur where the air filter becomes plugged
with dirt (starving the engine of air), loss of power and
heavy black smoke will result; the air filter should be
serviced immediately. See Appendix A for air filter part
numbers by Clarke Engine Model.
intake air restriction allowed, per engine model, can be
seen in the following table.
CAUTION: Do not attempt to remove the air filter
while an engine is running nor run the engine while the
air filter is off.
severe injury to personnel and major internal engine
damage could occur should any foreign matter be
drawn into the engine.
The air filter manufacturer recommends the following:
1) The pre-oiled reusable elements are serviced
with a special oil.
serviced or replaced.
2) Figure #14 shows the air filter service
instructions.
3) When servicing the element is not practical,
you can improve filter efficiency by re-
spraying with oil.
32
The maximum
Exposed components could cause
The elements can be

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