DARLEY ZSP, Инструкции по установке, эксплуатации, техническому обслуживанию, ремонту и устранению неисправностей

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Prepared by: EAP Rev. #3
Approved by: MCR
1
Date: 1/29/07
Revised by: JAF Revised Date: 5/1/13
1200509
WARNING: DO NOT USE THIS PUMP FOR HOSE TESTING
OPERATING THE ENGINE
After the pump has been primed, the engine speed should be increased gradually -- never jerk
throttle wide open. Likewise, the engine speed should be decreased gradually when shutting
down.
Watch the pump pressure gage and open throttle only enough to give the desired pressure. The
pressure may rise high enough to burst the discharge hose, when using small nozzles, if the engine
is given full throttle (except pumps equipped with pressure regulators set for desired pressure).
Never run engine at high speeds except when pump is primed and ready to discharge water.
COOLING THE ENGINE
NFPA 1901 requires that a supplementary heat exchanger cooling system be provided. On most
models, this heat exchanger is an integral part of the pump, and the installation of two hoses from
the engine cooling system to the pump is all that is required.
On some models an external heat exchanger must be used. In that case two hoses from the
engine cooling system and two lines from the pump will run to the heat exchanger.
The cooling line should not be opened until pressure develops in the pump, and pump should never
be operated under heavy loads prolonged without an adequate supply of cooling water flowing.
Coolant temperatures should never be allowed to exceed 200
o
F while pumping and 180
o
F is
usually taken as a safe operating temperature.
Always shut off cooling line when through pumping.
SUCTION STRAINERS
A large suction strainer, which will prevent the passage of a body larger than the pump impeller
ports, must always be used on the free end of the suction line when pumping from draft.
The small hydrant strainer must always be inserted in the suction manifold of pump, when pumping
from hydrants and at all other times except when maximum capacity is required from draft.
Failure to use a strainer at all times when pumping will cause serious trouble by clogging the pump
because, even in water mains, foreign matter is invariably present, and will be drawn into pump by
the high velocity of the water entering.
SUCTION LINE
The suction line of a fire pump can be the source of more operating difficulties than all the rest of
the pump when working with a suction lift. Faults in the suction line which cause trouble in
operation are as follows:
AIR LEAKS:
A small amount of air, expanding in the vacuum of the suction line, displaces a considerable
volume of water which subtracts from the capacity that the pump is able to deliver, making the
priming difficult or causing the pump to lose its prime. Therefore, it is absolutely essential to keep
the suction line and the suction side of pump casing air tight at all time when drafting water.