Pentair MYERS PUMP VAULT 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.
PUMP VAULT
SEPTIC TANK PUMP VAULT
FILTER SYSTEM
INSTALLATION AND SERVICE MANUAL
Part # 23833A631 | © 2012 Pentair Pump Group, Inc. | 11/08/12

23833A631 11/08/12 2
Thank you for purchasing your Myers pump vault
system.
DO NOT THROW AWAY THIS MANUAL. Keep it in
a safe place so that you may refer to it often for the
continued safe operation of the product.
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.
BEFORE INSTALLATION:
This manual contains important information for the safe
use of this product. Read this manual completely and
follow the instructions carefully. Reasonable care and
safe methods relating to the installation and operation of
this product should be practiced. Check local codes and
requirements before installation.
Biohazard Risk. Once the wastewater source has been
connected to system, biohazard risk exists. Installer(s)
and/or service personnel must use proper Personal
Protective Equipment and follow handling procedures
per OSHA 29 CFR 1910.1030 when handling equipment
after wastewater source has been connected to system.
Failure to heed warnings and caution counld result in
injury or death.
WARNING: Before installing or servicing your pump, BE
CERTAIN THE PUMP POWER SOURCE IS TURNED OFF
AND DISCONNECTED. Only qualified personnel may install
this system. NFPA 70/National Electric Code (NEC) or local
codes must be followed. The system must be properly
grounded according to NEC.
WARNING: Risk of Electrical Shock – To reduce risk of
electrical shock:
• Connect only to a properly grounded control panel.
• Do not smoke or use sparkable electrical devices or
flame in a septic (gaseous) or possible septic sump.
• Do not install pump in locations classified as
hazardous per N.E.C., ANSI/NFPA 70 - 1999.
Additional Warnings:
• Tank should be vented in accordance with local
plumbing codes
• A septic sump condition may exist and if entry into
sump is necessary, then (1) provide proper safety
precautions per OSHA requirements and (2) do
not enter sump until these precautions are strictly
followed.
• For use with maximum 120°F water.
This manual covers pump vault units of both 49" and
57" heights. Please make sure which system you are
installing. The applicable size is determined by the
depth of your septic tank.
INSTALLATION INSTRUCTIONS
Application: The pump vault is designed for
installation into either a one- or two-chamber septic or
pump tank to assist in the removal of filtered effluent.
Effluent is screened to filter out all solids greater than
1/8". This screened effluent is then pumped by a
high-head effluent STEP pump to the next stage of
processing.
Receiving the System: Remove pump vault, STEP
pump, and components to be sure all items are
included and inspect for possible concealed damage.
Any damage should be reported immediately to the
delivering carrier. Claims for damage must originate
with the receiver. Claims for shipping damage cannot
be processed at the factory.
Vault System Handling: Factory built filter systems
must not be dropped, dragged, rolled, or handled with
sharp objects. Improper handling of filter systems
may result in damage to the basin, damage to basin
components, or leaks in the piping assemblies.
Step 1: Determine the type of septic or pump tank
you have.
Concrete Tank: A 19" access hole is required in
a concrete tank. A 24" or 30" diameter riser with a
minimum height of 18" is required for use of the pump
vault. Manufacturer’s instructions must be followed
for riser installation to ensure a watertight seal.
Fiberglass / Polyethylene Tank: These tanks
typically have 24" diameter riser integral to the
tank design. Refer to and follow manufacturer’s
instructions if a riser of different diameter is needed
(24" minimum diameter riser is required for use of the
pump vault).
Step 2 (Existing Tank use only): Empty and clean
out the tank.

23833A631 11/08/12
3
Step 3: Lower the housing into the tank, resting the
support pipes on the top of the tank.
Step 4: Insert the preassembled 40" PVC pipe with
pipe adapter (Figure 1, part A), pipe adapter end
first, into the pump. Lower the pump into the pump
chamber of the housing. Note: The chamber is
designed to handle either one or two STEP pumps.
A single pump can be located in either side of the
chamber. Place a mark on PVC pipe “A” at the height
necessary to be below frost line, per local code.
Step 5: Position the rest of the discharge kit (Figure 1,
part B) with the open end of the elbow beside the pipe
marking. This determines the discharge exit location
on the riser. Mark the location where the discharge
pipe will exit on the riser.
Remove the pump and discharge assembly. Using
a properly maintained, 2-1/2" piloted hole saw, cut
a hole in the riser at the marked location. Insert the
flexible grommet (provided with the discharge kit) into
the drilled hole.
Step 6: Cut the PVC pipe (part A) at the marked
location. Remove any shavings from the cut PVC
pipe. Disassemble the union from part B. Use pipe
cleaner to clean off the pipe and inside of the elbow
from part B. Using PVC cement, attach the pipe and
elbow.
Step 7: Cement the remaining loose joints in the
discharge kit (figure 1, part B). Several joints in the
discharge kit are left un-cemented at the factory to
allow adjustments during instillation. Verify that all
joints are properly cemented and leak free before
puting the filter into service.
Step 8: If you removed the discharge pipe from the
pump to cut and assemble the kit, reattach it to
the pump. Lubricate the inside lip of the discharge
grommet with pipe soap. Slide the discharge pipe
through the grommet. Reinstall the pump and
discharge piping into the pump chamber. Align
the assembly as shown in Figure 2 and assemble
the union. Close the shut-off valve and attach the
discharge pipe to the lateral field pipe with PVC
solvent/cement. It is strongly recommended that
an additional shut-off valve and redundant check
valve be located outside the basin at any force
main entrances - check local codes for specific
requirements.

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SHORT HOUSING
(2) CONFIGURATIONS
AVAILABLE
[1447.8]
57.00
TALL HOUSING
[1244.6]
49.00
MIN
[44.45]
1.75
(PER LOCAL CODE)
55 3/8"
1405.3
11
PER LOCAL CODE
DISCHARGE MUST FALL BELO
W
FROST LINE FROM GRADE
CONTROL PANEL
J - BOX LID
FILTERED EFFLUENT
PIPE SEAL
FILTER
ADJUSTABLE FLOAT
COLLAR
SEPTIC TANK
ALARM CONTROL
PUMP ON
PUMP OFF
SUPPORT PIPES
17" IN LENGTH
BALL CHECK
SECURE EXCESS CORDAGE
ACCESS RISER
VAULT HOUSING
PREWIRED
CONDUIT
SHUT-OFF VALVE
19" ACCESS OPENING
Figure 3
2.50
63.5
20°
Figure 2
TYPICAL INSTALLATION

23833A631 11/08/12
5
WARNING: Risk of electrical shock or electrocution.
Failure to heed the warnings may result in serious
injury, death, or fire hazard. The installer must
disconnect all electrical sources prior to installation.
Only qualified personnel may install this system.
NFPA 70/National Electric Code (NEC) or local codes
must be followed. System must be properly grounded
according to NEC or local codes.
CAUTION: All local wiring codes must be observed.
Consult the local inspector before installation to avoid
costly delays that can occur due to rejection after
the job is finished. Only qualified electricians should
make the installation. Complete wiring diagrams are
included for use in making the installation. All wires
should be checked for shorts to ground with an
ohmmeter or Megger after the connections are made.
This is important, as one grounded wire can cause
considerable trouble.
Pump Installation
Follow STEP pump installation instructions for safe
and correct pump operation.
Float Tree Assembly
The float tree assembly is shipped disassembled
from the factory. The floats will be assembled to the
float clips and pre-set to the 2.5" float tether length
as required for proper operation. The float clips must
be attached to the float tree in the proper positions in
order to meet necessary reserve capacity, pump on
level, pump off level, alarm level, and to meet local
codes.
The floats must be staggered 20 degrees as shown in
figure 3 to ensure proper operation.
The float tether length must be 2.5" as shown in figure
3 to avoid float failure.
Filter Installation
Lower the filter assembly into the housing until it
bottoms out. Turn the PVC latch to lock the filter
in place (The filter must be installed in the housing
before the pump vault assembly is installed).
Junction Box Connections (when used)
Step 1: Ensure power source is off or disconnected.
Step 2: Install the junction box in the riser in a location
which will not interfere with the removal of the filter.
Step 3: Install a conduit seal outside the basin to
prevent surface water from entering the junction box.
Step 4: Push pump power and float cords through
cord grips in the junction box and tighten the cord
grips. To prevent corrosion or electrical short, plug
any unused holes.
Step 5: Remove junction box cover and make all
connections inside junction box to all incoming alarm/
control panel wires.
Electrical Connections
Note: Failure to use a manufacturer approved
alarm or control panel voids the pump warranty and
guarantee.
IMPORTANT: Properly connect the panel ground
wire to a grounding rod. Improper grounding voids
warranty.
Panel Wiring
Ensure power source is off or disconnected.
Follow the alarm/control panel installation instructions
as provided by the manufacturer.
Start-up Checks
Before placing the pump into operation, verify the
following:
• Septic tank or pump chamber installed according to
local regulations
• Septic tank or pump chamber is watertight
• Access riser and cover are installed according to
manufacturer’s instructions and local regulations
• Pump vault is installed according to instructions
• Float tree is installed and wired into control panel
• Float switches are free to move within vault housing
• All electrical connections are watertight and
conform to the National Electric Code (NEC) and
state and local regulations
Step 1: Run clean water into the septic tank or pump
chamber.
Step 2: Open the shut-off valve.
Step 3: Turn the H-O-A switch to the Off position and
turn on the main breaker.
Step 4: Start the pump by turning the H-O-A switch to
the Hand or Manual position.

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Step 5: Check the pump amperage with a clamp-
on amp meter on the black pump lead. Readings
higher than the nameplate indicate a clogged pump,
miswiring, or improper voltage.
Step 6: Ensure H-O-A switch is set to Auto before
placing system into service.
Below is a list of common problems and possible
solutions. Refer to the pump and panel installation
service manuals for details regarding any necessary
adjusting, dismantling, or repair work.
WARNING: Risk of electrical shock or electrocution.
Failure to heed these warnings may result in serious
injury or death or fire hazard. Installer must disconnect
all electrical sources prior to installation. Only qualified
personnel may install or service this system. NFPA
70/National Electric Code (NEC) or local codes must
be followed. System must be properly grounded
according to NEC or local codes.
WARNING: Before installing or servicing your pump,
BE CERTAIN THAT THE PUMP POWER SOURCE IS
TURNED OFF AND DISCONNECTED.
Pump won’t run
1. Blown fuse, circuit breaker is in Off position,
broken (or loose) electrical connections. Check
fuses, breakers, and all electrical connections.
2. Motor overload protection contacts open.
Contacts will close automatically within short
time.
3. Low voltage. Check voltage at control panel.
Pump runs, but no water pumped
1. Check valve installed backward. Reverse and
reinstall.
2. The intake strainer is clogged. Remove the pump
and clean the strainer.
Reduced capacity
1. The strainer or impellers partially clogged or
plugged. Remove the pump and clean the
strainer.
Basin level is pumped down with H-O-A in Hand
or Manual position, but will not pump down in
Automatic.
1. Floats are not hanging free in the basin or are
covered with grease. Pump the level down with
the H-O-A switch in Hand or Manual, so that
the floats can be observed. Relocate and clean
float(s) as necessary.
2. If this is a new installation and original start-up,
the floats may be miswired in the control/alarm
panel. If the On and Off floats are reversed, the
pump will short-cycle On and Off and will not
pump the level down.
3. Floats are malfunctioning. Pull the floats out of the
basin and hang the Off and On floats from your
hand. Turn the H-O-A switch to Auto. Tilt the Off
float so that the large end is above the cord end
(nothing should happen). While keeping the Off
float tilted, tilt the On float in the same manner
(the pump should come on). Suspend the On float
again from your hand (the pump should continue
to run). Finally, suspend the Off float from your
hand (the pump should stop running). If this
procedure does not cause the pump to operate as
described, replace the float(s).
Biohazard Risk. Once the wastewater source has
been connected to system, biohazard risk exists.
Installer(s) and/or service personnel must use proper
Personal Protective Equipment and follow handling
procedures per OSHA 29 CFR 1910.1030 when
handling equipment after wastewater source has been
connected to system.
Risk of fire or explosion. Do not smoke or use open
flames in or around this system. This system is not
intended for use in hazardous locations per NFPA 70
National Electric Code. Consult factory for optional
equipment rated for this use.
WARNING: Before installing or servicing your
pump, BE CERTAIN THAT THE PUMP POWER
SOURCE IS TURNED OFF AND DISCONNECTED.
The pump vault system requires periodic maintenance
to ensure proper operation.
Service Frequency
The pump vault system prevents solids larger than
1/8" from entering drain lines. As a result, solids will
periodically build up between the housing and filter.
This requires the filter to be cleaned off. The service
interval will depend upon usage patterns.
At a minimum, the pump vault housing and filter
should be cleaned each time the septic or pump tank
is pumped out. Annual inspections by certified service
personnel are recommended.
Any high water alarm is an indication that attention
to the system is required. Frequent high water alarm
activation is an indication that system service is
required.

23833A631 11/08/12
7
Servicing the System
The following tasks should be performed each time
the pump vault system is serviced:
Step 1: Turn off power to the system.
Step 2: Check the sludge level of the septic tank. If
the sludge level reaches the bottom of the pump vault
housing inlet, the septic tank must be pumped out.
Step 3: Remove the pump, clean off the pump
screen, and inspect the pump for any damaged
or malfunctioning components. Repair or replace
components as necessary.
Step 4: Remove the filter and remove any debris.
Inspect the filter for damage. Replace the filter if there
are any tears or breaks.
Step 5: Remove any debris from the vault housing
and inspect the housing for damage.
Step 6: Reassemble the housing, filter and pump and
reinstall in the tank.
Step 7: Turn system power back on.
Step 8: Test float and alarm/control panel operation
and repair/replace any malfunctioning components.
No. Description 49" 57"
1 Housing 27623D003 27623D004
2 Filter Assembly 27628D001 27624D002
3 Float Tree w/ Floats 27628D001 27628D002***
4 Discharge Kit* 27418A805 27418A805***
5 Effluent Pump** 27356D306 27356D306***
*Discharge kit includes union, ball valve, pipe, and pump/pipe adapter.
**Consult factory for available pump sizes
*** Available in Duplex configuration. Consult factory for details.
No. 3 – Other float tree configurations are available, consult factory for details
1
2
3
4
5

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