Pentair MYERS MBSP Manual

NOTE! To the installer: Please make sure you provide this manual to the owner of the equipment or to the responsible
party who maintains the system.
MODEL MBSP
12 VOLT BATTERY BACK-UP
SUMP PUMP SYSTEM
INSTALLATION AND SERVICE MANUAL
Part # 23833A200 | © 2012 Pentair Pump Group, Inc. | 11/08/12

23833A200 11/08/12 2
CAUTIONS/WARNINGS
Failure to follow instructions could cause serious
bodily injury and/or property damage. Use only as
a back-up sump pump in residential wastewater
applications. DO NOT run the pump dry.
1. Check local plumbing and electrical codes before
installing to ensure compliance.
2. Battery box must be kept in a cool, dry, well
ventilated area, and battery must not be exposed
to any sparks or flames. An explosion or fire could
result. Battery acid is very corrosive; avoid spilling
on skin or clothing. Eye protection must be worn
when handling the battery.
3. Battery Selection and Maintenance
• Use a new 12 volt, fully charged battery with
top terminals. For maximum performance and
battery life, a deep cycle (marine, group 24, min.
90 to 100 AH) battery should be used. A Group
27 battery may be used if it will fit in the battery
box. The electrolyte level should be checked
monthly and filled as required. Automotive
batteries may be used, but a decrease in
performance and battery life will result.
• Group 24 batteries will fit into the battery box
with maximum battery dimensions of 12" long x
6-1/2" wide x 9" high to the top of the terminals.
• Every three months battery maintenance should
be done as follows:
Unplug the battery charger. On batteries with
removable top caps, measure the specific gravity
of the electrolyte with a hydrometer. If any cell
is less than 1.225 specific gravity or if the cells
vary more than .050 specific gravity, the battery
should be replaced. Check the electrolyte level
and fill as required. Check battery terminals and
clamps for tightness and corrosion and service
as required. Plug battery charger back in.
• Replace the battery if the backup pump operated
for an extended period of time and the battery is
severely discharged. It is also recommended that
the battery be replaced every three years even if
the system is not used.
4. When service is required, proceed carefully:
• Disconnect the power at the main electrical
service box by turning the circuit breaker off or
by removing the fuse.
• Disconnect the battery charger from the wall
after the power is disconnected.
• DO NOT lift the pump by the cord.
CALIFORNIA PROPOSITION 65 WARNING:
This product and related
accessories contain chemicals known to the
State of California to cause cancer, birth
defects or other reproductive harm.
INSTALLATION INSTRUCTIONS
1. Disconnect power to the primary sump pump.
2. Assemble control panel to battery box with four
screws included.
3. Position 12 volt battery (not provided) into battery
box.
4. Assemble the two lead wires from control panel to
the battery with the two battery clamps.
Note: Assemble RED wire to POSITIVE (+) battery
terminal and BLACK wire to NEGATIVE (–) battery
terminal. The RED wire is supplied with an in-line
fuse to protect the battery, pump and wiring should
a short, overcurrent or ground fault occur. If this
fuse must be replaced for any reason, it must be
replaced with one of the exact same rating. Failure
to do so may result in a fire hazard. If the polarities
are connected wrong, the REVERSE battery
indicator light on the control panel will come on.
Correct the battery wire connections. There is an
automatic reset in the panel. A short time will be
required for it to reset. The connections must be
clean and tight.
If voltage of the battery is lower than DC 11 volts,
the LOW battery indicator light will come on and
the buzzer will sound for the ALARM function.
Battery should be checked by a battery shop.
5. Assemble backup pump a minimum of 1" above
the primary pump and rotate 30°.
The enclosed pump includes a built-in check
valve and screws directly into the side of the tee
included.
The other two ends of the tee will accept 1-1/4" or
1-1/2" PVC and ABS pipe. An additional check
valve must be installed between the primary
pump and this pump.
6. Attach the float switch to the discharge pipe with a
wire tie. Be sure that the turn off or down position
of the float is above the suction inlet of this pump.
Tether at 1-1/4". Insert the plug of the float switch
into the SENSOR socket of the control panel.
7. Insert the plug of the battery charger into the
CHARGER socket of the control panel and plug
the charger into an AC-115 volt power outlet.
8. Insert the plug of the pump into the PUMP socket
of the control panel.
9. Push the manual RESET button and the unit is
ready for operation.
10.The back-up sump pump should be checked by
unplugging the primary sump pump and filling the
sump basin with water. When the water level is
slightly above the backup sump pump, it should
turn on. As the water level drops, the backup
sump pump should turn off before the water level
reaches the bottom of the backup pump. If not,
raise the float switch slightly. Press the RESET and
plug the primary sump pump back in.
Note: Be sure that there is a 4" minimum from the
top of the backup pump to the top of the sump.

23833A200 11/08/12
3
The float switch should turn this pump ON near the
top of the pump and at least 2" down from the top
of the sump.
OPERATION AND TESTING
Testing: After installation, unplug the primary sump
pump and fill the sump with water. This is actually
imitating the condition that would happen if the power
went off or the primary pump failed for whatever
reason. The backup sump pump should begin
operation as the water level rises just above its top.
If not, the float sensor may need to be repositioned;
review float installation instructions. Even after the
backup has pumped the excess water out and shut
off, the alarm should continue sounding until the
ALARM switch is set to the OFF position. The alarm
continues to sound until the ALARM switch is set to
OFF to alert you that something is wrong with the
primary sump pump.
When testing unit by either pressing reset button or
lifting the float, there is an approximate 10 second
delay before the pump starts and a 40 second delay
before pump stops.
If the backup pump operates properly, plug in the
primary sump pump and set the ALARM switch ON
and press the RESET button. The backup system is
now in full readiness.
Operation: When the FLOAT SWITCH turns the
backup pump ON, the alarm buzzer will sound. When
the FLOAT switch turns the back-up OFF, the buzzer
will continue to sound until the ALARM switch is
pushed to the OFF position. Push the ALARM switch
to the ON position. Press the RESET button for
normal operation.
If the voltage of the battery drops lower than 11 volts
DC, the LOW battery indicator will come on and the
buzzer will sound if the ALARM switch is in the ON
position. At this time, the battery should be checked
and serviced or replaced. The only real test for a
battery is when it is tested with a load meter. Take the
battery back where it was purchased for the test.
The CHARGING indicator will come ON when the
battery is UNDERCHARGED. The CHARGING
indicator will turn OFF when the DC voltage is over 13
volts, then the CHARGED indicator will come ON. At
this time the battery is at FULL-CHARGED condition
and will stop charging. The CHARGED indicator will
be ON until the DC voltage drops. The battery will
start charging again and the CHARGING indicator
will come ON. If either CHARGING indicator and
CHARGED indicator are not ON, check the charger
adapter for proper connection.
Near the end of the CHARGING cycle, the CHARGING
and CHARGED indicators may alternately blink. If the
lights blink continuously, check the battery leads for
proper polarity and replace the fuse.
Press PUMP TEST switch for pump function test:
the pump comes ON and ALARM indicator comes
ON and BUZZER sounds. Release the PUMP
TEST switch; the pump turns OFF but the BUZZER
continues to sound and ALARM indicator continues
to be ON. Press the RESET switch; the BUZZER and
ALARM indicator light will turn OFF.
Reference Part Number Description Qty.
1 24963B505C SUMP PUMP 1
2 24963B504A BATTERY BOX 1
3 24963B507B PANEL CONTROL 1
4 24963B503B TEE ADAPTER 1
5 24963B508B BATTERY CHARGER 1
6 24963B506B LEVEL CONTROL 1
7 08978A008 TAPPING SCREW (NOT SHOWN) 4
8 17190A012 CABLE NYLON TIE (NOT SHOWN) 4
9 24963B509A BATTERY CLAMP (NOT SHOWN) 2
12-VOLT SYSTEM MODEL MBSP PARTS LIST –
Battery not included
Fig. 1 – Rotating Pump
Fig. 2 – Attaching Ring Terminals
and Battery Clamps
Backup Sump Pump

Warranty Rev. 12/13
STANDARD LIMITED WARRANTY
Pentair Myers® warrants its products against defects in material and workmanship for a period of 12 months from the
date of shipment from Pentair Myers or 18 months from the manufacturing date, whichever occurs first – provided
that such products are used in compliance with the requirements of the Pentair Myers catalog and technical manuals
for use in pumping raw sewage, municipal wastewater or similar, abrasive-free, noncorrosive liquids.
During the warranty period and subject to the conditions set forth, Pentair Myers, at its discretion, will repair or
replace to the original user, the parts that prove defective in materials and workmanship. Pentair Myers reserves the
right to change or improve its products or any portions thereof without being obligated to provide such a change or
improvement for prior sold and/or shipped units.
Start-up reports and electrical schematics may be required to support warranty claims. Submit at the time of start-
up through the Pentair Myers website: http://forms.pentairliterature.com/startupform/startupform.asp?type=m.
Warranty is effective only if Pentair Myers authorized control panels are used. All seal fail and heat sensing devices
must be hooked up, functional and monitored or this warranty will be void. Pentair Myers will cover only the lower
seal and labor thereof for all dual seal pumps. Under no circumstance will Pentair Myers be responsible for the cost
of field labor, travel expenses, rented equipment, removal/reinstallation costs or freight expenses to and from the
factory or an authorized Pentair Myers service facility.
This limited warranty will not apply: (a) to defects or malfunctions resulting from failure to properly install, operate or
maintain the unit in accordance with the printed instructions provided; (b) to failures resulting from abuse, accident
or negligence; (c) to normal maintenance services and parts used in connection with such service; (d) to units that
are not installed in accordance with applicable local codes, ordinances and good trade practices; (e) if the unit is
moved from its original installation location; (f) if unit is used for purposes other than for what it is designed and
manufactured; (g) to any unit that has been repaired or altered by anyone other than Pentair Myers or an authorized
Pentair Myers service provider; (h) to any unit that has been repaired using non factory specified/OEM parts.
Warranty Exclusions: PENTAIR MYERS MAKES NO EXPRESS OR IMPLIED WARRANTIES THAT EXTEND BEYOND
THE DESCRIPTION ON THE FACE HEREOF. PENTAIR MYERS SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE.
Liability Limitation: IN NO EVENT SHALL PENTAIR MYERS BE LIABLE OR RESPONSIBLE FOR CONSEQUENTIAL,
INCIDENTAL OR SPECIAL DAMAGES RESULTING FROM OR RELATED IN ANY MANNER TO ANY PENTAIR MYERS
PRODUCT OR PARTS THEREOF. PERSONAL INJURY AND/OR PROPERTY DAMAGE MAY RESULT FROM IMPROPER
INSTALLATION. PENTAIR MYERS DISCLAIMS ALL LIABILITY, INCLUDING LIABILITY UNDER THIS WARRANTY, FOR
IMPROPER INSTALLATION. PENTAIR MYERS RECOMMENDS INSTALLATION BY PROFESSIONALS.
Some states do not permit some or all of the above warranty limitations or the exclusion or limitation of incidental or
consequential damages and therefore such limitations may not apply to you. No warranties or representations at any
time made by any representatives of Pentair Myers shall vary or expand the provision hereof.
1101 MYERS PARKWAY 490 PINEBUSH ROAD, UNIT 4
ASHLAND, OHIO 44805 CAMBRIDGE, ONTARIO, CANADA N1T 0A5
PH: 855-274-8947 PH: 800-363-7867
WWW.FEMYERS.COM WWW.FEMYERS.COM