PEP Filters BMF - Manual (Page 4)

BMF Series Media Filter
Operating & Maintenance Manual
PEP Filters • 322 Rolling Hill Road • Mooresville, NC 28117 • 800-243-4583 • www.pepfilters.com
704-662-3133 (Outside USA) Page 4 of 14 Fax 704-662-3155
rev. 01/02
Connect a backwash waste line to the connection labeled "Waste". This line carries the backwash wastewater to drain. Do not
install a valve in the waste line. Refer to Table 3 for the minimum and maximum backwash flow rates. Note: If the drain is not
large enough to handle the volume of water during backwash, it may be necessary to use a backwash water holding tank to buffer
the backwash flow rate from the filter to the waste drain. A valve can be used to regulate the flow from the holding tank at a
reduced flow rate that is suitable for the drain. Do not reduce the waste line pipe to regulate backwash flow rate as this will
adversely affect the backwash cycle and cause accumulated waste in the filter vessel.
All inter-connecting piping, fittings, valves, or other accessories connected to the filter system (whether supplied by PEP or
others) must be independently supported to eliminate stress on piping. Check with local or other governmental authority to
ensure compliance with applicable codes.
All BMF filter vessels have a drain plug located on the bottom.
Loading the Filter Media
The special sand media used in BMF industrial water filters is shipped in one cubic foot bags and each bag weighs 100 lbs.
Media quantity may vary with vessel pressure ratings. Correct quantities will be noted on the shipping and inspection
records for each filter system.
! Important ! To avoid damage to the filter under-drain, the filter vessel must be filled with water (1/3 ~ 1/2 full) before loading
media into the vessel. The under-drain support gravel (Unigran 475) is loaded first. For single media applications, the silica sand
is loaded next. Check filter internals for damage before loading the media.
Operation and Maintenance
Initial and Seasonal Start-up
Before initial start-up or after a down period, the filter should be thoroughly inspected and cleaned.
! Caution, safety first ! The first five steps in the following procedure must be performed with the electric power off, locked and
tagged at the main panel. Maintenance personnel should follow the recommended safety precautions found in the Safety
Precautions section in this manual prior to initial and seasonal start-up.
1. On BMF filters with pumps and pre-strainers, loosen the bolts around the pump pre-strainer tank lid. Remove the lid,
inspect the O-ring seal and lubricate. Remove debris from the pump pre-strainer basket. Replace the basket, lid and
bolts. Now is a good time to prime the pump suction line.
2. Turn the pump and motor shaft by hand to ensure free rotation.
3. On BMF filters with manual backwash only, rotate the valves manually by moving the valve linkage up and
down to ensure free operation. Make sure the valves and linkage are in the backwash position before start-up.
This initial backwash will help to remove any dust particulate in the media before the filtration cycle begins.
4. Loosen the access port and hand hole covers and lubricate the bolts if necessary.
5. Inspect the over-drain assembly and media. If the media is contaminated, remove the foreign material or replace
the media. Replace the access port and hand hole covers.
6. Open the air relief valve on top of the filter tank. Start the pump motor briefly and check the arrow on the pump
volute for proper rotation. Turn the pump motor off. Do not operate the pump for an extended period of time with
the pump rotating backwards. If rotation is backward, have a qualified electrician change pump motor leads to
correct rotation.
7. With the air relief valve open, check the shut-off valves in the filter inlet and outlet water lines to verify they are
open. Make sure the pump is primed. Start the pump and allow the filter vessel to fill. Close the manual air relief
valve on top of the vessel after all air has been vented from the vessel.
8. Check the voltage and current of all leads on the pump motor. The current draw should not exceed the pump