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© Copyright 2018 Zoeller
®
Co. All rights reserved.
Duplex Prepackaged System Installation Instructions
1. Review the drawing in Fig. 5 on page 6 and the actual system to
become familiar with the components in the packaged grinder pump
system. Review where the unit will be installed. Determine where
the power feed, inlet pipe, and discharge pipe will be located.
2. Remove the unit from packing. Prepackaged outdoor systems are
preassembled at the Zoeller Company and require a minimum of
eld assembly work. Float switches are set and tethered for proper
operation from the Factory. The alarm switch should be located
3” above the pump “on” level. Three oat systems used with a
control panel are placed at 27”, 24”, and 15” from the bottom of
the basin. Four oat systems used with a control panel are placed
at 30”, 27”, 24”, and 15” from the bottom of the basin. If the invert
location is at or below the level of the oat switches, contact the
factory.
3. Float switches are tied in place for shipping purposes on all model
prepackaged systems. Cut the cable tie around each oat switch
bulb or the unit will not operate properly. Verify that where the oat
switches are set will work for your application. Verifying that the
oat switches are set properly and will not hang up inside the
basin is the responsibility of the installing contractor.
4. Dig a hole for the basin. The hole should be at least 24” larger in
diameter than the basin diameter to provide 12” of backll all around
and deep enough to provide either 12” of compacted backll or
6” when a concrete pad is required. Note: Care must be taken
when excavating in order to avoid underground utilities and
disturbance of existing structure foundations. The hole
should be located at least ten feet from adjacent structures.
Additional distance may be required to sufciently locate the
basin outside of the loading area of the adjacent structures.
5. The location of the inlet hub is determined by the depth of the inlet
pipe. The inlet hub must be used with 4” pipe. It is best to install
the inlet on the side of the basin opposite the oat switches. To
install, use a 4” hole saw to drill into the side of the basin at the
correct elevation. Center the hub inner diameter with the hole in
the basin. Attach the hub to the side of the basin using the sealant
and hardware provided.
6. The bottom of the excavation can now be properly backlled,
compacted and leveled. Set basin in hole. Ensure the removable
cover extends above the nished grade line and the grade slopes
away from the unit. Backll and subbase should be 1/8” –3/4” pea
gravel or 1/8” –1/2” crushed stone. (Reference basin installation
instructions included with unit.) Most systems are supplied with a
eld installed 4” pipe seal inlet tting. This inlet tting is installed
in the basin's side-wall in a 5” hole drilled with a hole saw at a
location lining up with the inlet pipe. Other type ttings and sizes
are occasionally provided.
7. Pouring a concrete anchor around system can now be completed.
Basin should be lled with water when pouring concrete to minimize
movement of the system. Backll around basin with specied media.
Care should be used to avoid damaging components or leaving
voids when back lling. Refer to Basin installation reference guide
on more specic requirements.
8. PVC or HDPE discharge piping is connected to the 2” threaded
tting located in the basin sidewall. Support discharge piping with
sufcient backll.
9. Connect lift cable to top of pump. Lower the pump into basin
ensuring the discharge pipe bracket slides into the disconnect
tting.
10. Note: The grinder basin is a sewage holding tank. Vent
connection should be installed in accordance with all national,
state and local plumbing codes.
11. Dig a trench for the electrical conduit. The conduit should be
located below the frost line. Follow all applicable electrical codes.
12. Connect electrical conduit and wiring according to wiring instructions
included in this manual.
13. Mount the control panel within sight of the system. Connect
oat switches and pump cords according to the “Pump Wiring
Instructions” found later in this manual and located inside the panel
enclosure.
14. Remove any debris from the basin. Using clean water, check the
system for proper operation.
15. Seal and secure the lid using the proper bolts and sealant when
using a lid without a formed gasket.
16. Test system for leaks and proper pump operation.
17. Record system start up data for future reference.
This set of instructions is for factory prepackaged outdoor grinder systems only. If this is a eld assembled outdoor system
you can use these instructions as a guideline. The pump should not be installed in the basin until permanent electrical power is available.
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