Shurflo 2901-6203 Installation Manual

INSTALLATION AND OPERATION MANUAL

The Blaster Pump delivers water on demand. With the spray nozzle off (output side closed) the
pump will turn off. As the nozzle is opened, the pressure within the hose (output side) drops.
Once the pressure drops below a predetermined point, the pumps pressure switch closes and
the pump operates. With the nozzle set at a fine mist the pump will cycle, as it is able to
pressurize the hose faster than water being released. If the spray nozzle is held wide open the
pump may operate continually. The pump may momentarily operate even after the nozzle is
closed, as it pressurizes the hose. Once the pressure setting is reached the switch opens and
the pump stops.

DUTY CYCLE

Wash-down pumps are rated for intermittent duty, as they operate at higher than average
pressures. Operating a pump continuously for more than twenty (20) minutes, within an hour
period, is not recommended. Actual duty cycle is determined by amp draw, temperature, and
rate of cycling.

NOTE: Rapid cycling should be minimized to ensure long life. Rapid cycling is defined as

ON/OFF within two seconds. For best results, use the 8 oz SHURflo accumulator tank

model # 182 series.

TYPICAL INSTALLATION

+

CAUTION:

Use of "open" type switches
(not ignition protected) may cause
an explosion of fuel vapors.

ELECTRICAL

• The pump should be on a
dedicated (individual) circuit
protected by the specified
fuse indicated on the motor
label.

• A U/L approved marine duty

(ignition protected) switch rated
at or above 15 amps is recom­mended, and must interrupt
current flow on the positive (+
red) lead.

• Wire size (gauge/Mm2) is based
on the distance from the power
source to the pump. The
minimum recommended wire
size is #14 gauge [2.5Mm2]. For
lengths of 20-50 ft. [6-15M] use
#12 gauge [4Mm2]. The pump
must be grounded to a "known
ground" (battery). The ground
wire must be the same size as
the positive wire.

911-732 Rev D 12/08 ECO #: 16135 Page 1 of 4

MOUNTING

• Consider a dry location that allows easy access if maintenance is required. The pump should not
be located in an area of less than one cubic foot unless adequate ventilation is provided.
Excessive heat may trigger the integral thermal breaker and interrupt operation. When the
temperature drops the breaker will automatically reset and start operation.

• Mount higher than the outside water (sea) level. The pump is capable of a 6 ft. [2M] vertical
prime above the outside water level. The pump can be mounted in any position. If mounting
the pump vertically, the pump head should be in the down position.

CAUTION: Do not drive screws through the vessel's hull. Use #8 stainless steel hardware to

fasten the pump. Choose a solid surface (bulkhead or stringer) that will not amplify pump sound.
The mounting feet are intended to isolate the pump from the mounting surface; over-tightening,
flattening, or oversized screws will reduce the mounting pads ability to isolate vibration and noise.

PLUMBING

• SHURflo swivel/hex barb fittings provide easy removal if maintenance or access required. The
fittings are designed with a “taper-seal”, creating a water tight connection when hand-tightened.
Always secure barb tubing connections with properly sized stainless steel clamps to prevent leaks.

• Avoid any sharp radius in tubing that may kink over time. Route tubing away from any heat
(exhaust manifolds etc.) and fasten securely.

• Inlet tubing (½"I.D. min.) from the seacock valve to the pump should be rated for vacuum. If
rigid pipe is utilized, SHURflo recommends that the pump inlet port be plumbed with 1 ft.
[.3M] of flexible tubing. Standard garden hose is not suitable as inlet tubing as it may collapse
under vacuum, reducing water flow.

• The pump outlet port should not be connected to rigid (plastic) pipe. Normal oscillation of the
pump may transmit through rigid plumbing causing noise and possibly loosen or crack
components. A 1ft. [.3M] length of flexible high-pressure tubing is suggested. Optional SHURflo
silencing kits are available for connecting to rigid tubing.

NOTES:

• To prevent cavitation, through hull fittings should be located at least 12 in. off the centerline

of the water pick-up for the motor.

• The through hull fitting must have a seacock valve to shut-off in case of an emergency.

• Always use high quality non-corrosive fittings, valves and hardware to assure long-term reliability.

• Properly seal all pipe threads before the strainer to prevent unforeseen leaks. Never use

Teflon tape or sealing compounds on SHURflo pump threads or fittings. Sealer may enter
the pump causing a failure not covered under warranty.

STRAINER / FILTRATION

Installation of a 50-mesh minimum strainer, such as SHURflo 253 series, is recommended to
prevent debris from entering the pump. SHURflo recommends at least 1ft. (.3 M) of 1/2” or
3/4” (13mm) I.D. flexible high-pressure tubing on both ports. Ideally, the pump ports and
strainers should not be connected to plastic or rigid pipe. The pump’s normal oscillation may
transmit through rigid plumbing causing noise, and possible loosen or cracking components.

CAUTION:

The strainer must be mounted above the outside water line to prevent water from siphoning during
cleaning. Mount the strainer where it can be inspected an cleaned easily without closing the
seacock valve.

911-732 Rev D Page 2 of 4