Specifications

25FP-250-00
2
07/2012
Specifications Information and Repair Parts Manual 25FP Series
x
25FP Fire Pump Series
INSTALLATION
Review all safety information located in pump safety manual.
Follow the instructions on all tags, labels and decals attached to
the pump.
Since pump installations are seldom identical, this section offers only
general recommendations and practices required to inspect, position,
and arrange the pump and piping.
Most of the information pertains to a standard static lift application
where the pump is positioned above the free level of liquid to be
pumped.
If installing in a flooded suction application where the liquid is supplied
to the pump by gravity or under pressure, some of the information such
as mounting, line configuration, and priming must be tailored to the
specific application. Be sure to limit the incoming pressure if required so
the maximum casing pressure does not exceed 180 psi (1240 kPa).
Pre-installation Inspection
The pump assembly was inspected before shipment from the factory.
Before installation, inspect the pump for damage which may have
occurred during shipment or in storage. Check as follows:
 Inspect pump casing for cracks, dents, damaged threads, and
other obvious damage.
 Check for and tighten any loose fasteners.
 Carefully read all hang tags, labels, and markings on the unit,
and follow the instructions indicated.
 Check oil level in engine, follow manufacturer’s
recommendations listed in engine manual.
 If unit has been stored for more than 12 months, replace
engine oil, drain any fuel and replace with fresh fuel.
 Check condition of suction strainer, clean if clogged with
debris.
Positioning Pump
This pump is light weight. Pump/engine is mounted in a roll frame that
has (4) four lifting handles built in. Handle has (2) two pins installed.
The pivot pin goes through handle end plates and directly through frame
tube. Second is the lock pin, it goes through handle end plates only.
To raise and lower handles:
 Remove cotter from lock pin end.
 Remove lock pin.
 Swing handle tube up perpendicular to frame tube.
 Install lock pin, fix with cotter.
 To lower handle remove lock pin, swing handle down,
reinstall lock pin.
Lift and carry pump/engine/battery only with handles. Remove suction
and discharge lines and all accessories from pump before lifting.
Mounting
Locate the pump in an accessible area as close as practical to the liquid
being pumped.
Pump should be leveled if possible by shimming under rubber feet. For
proper pump/engine operation unit should be within 15° of level.
Continuous operation outside this limit may cause engine/pump
damage.
System piping/hose
Flow through the system is reduced by increased suction lift, increased
discharge elevation or discharge nozzle pressure, and increased friction
losses.
 Keep suction and discharge lines as short and direct as
possible to reduce friction losses. If elbows are necessary in
discharge line use long-radius type when possible.
 Do not operate with coiled-up suction or discharge hose.
 Do not use valves in the suction line unless absolutely
necessary.
Suction Lines
The suction line must be as short and direct as possible. When
operating pump under a suction lift condition:
 To avoid air pockets which could affect pump priming, the
line must always slope upward to the pump from the liquid
source. If the line slopes down at any point along the
suction run air pockets will be created.
 Hose or pipe size must match pump suction size.
 The maximum vertical lift cannot exceed 20 feet (6.1
meters).
 If hose is used for the suction line it must be the rigid wall
reinforced type to prevent collapse under suction.
 Fittings are not recommended in the suction line.
Strainers
Use a suction strainer with ¼” maximum diameter holes on end of
suction line. A suction strainer will help remove large solids that could
clog the pump impeller and casing.
Discharge Lines
Use hose or piping that is rated above the maximum system line
pressure.
To reduce friction head keep line as short and direct as possible.
Make minimum use of elbows and fittings, they substantially increase
friction loss in the discharge line.
Do not terminate the discharge line at a level lower than that of the
liquid being pumped unless a siphon breaker is used in the line.
Otherwise, a siphoning action causing damage to the pump could
result.
Valves
A check valve in the discharge is normally recommended but it is not
necessary in low discharge head applications.
If a throttling valve is desired in the discharge line, use a valve as
large as the largest pipe to minimize friction losses. Never install a
throttling valve in the suction.
With high discharge heads it is recommended that a throttling valve
and a system check valve be installed in the discharge line to protect
the pump from excessive shock pressure and reverse rotation when it
is stopped.
Connections to Pump
Since even a slight leak will affect priming, head, and capacity,
especially when operating with a high suction lift, all threaded
connections in the suction line must be sealed with pipe sealant to
ensure an air tight seal. Check all hose connection gaskets; replace
any that are cracked, worn, or no longer elastic.
Suction Lines in Sumps/Pits
If a single suction line is installed in a sump, it should be positioned
away from the wall of the sump at a distance equal to 1-1/2 times the
diameter of the suction line.
If there is a liquid flow from an open pipe into the sump, the flow
should be kept away from the suction inlet because the inflow will
carry air down into the sump, and air entering the suction line will
reduce pump efficiency.
If it is necessary to position the inflow close to the suction inlet, install
a baffle between the inflow and the suction inlet at a distance 1-1/2
times the diameter of the suction line.
Suction Line Positioning
The depth of the suction line is critical to efficient pump operation.
Make certain end of suction line is far enough under the liquid surface.