7
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax 800-500-3115 • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form TFW-PSP-2/2:2/17
Project Specifications
Series
TFW
COMPONENT SPECIFICATION
CONTROLS
___
Standard Three phase or single phase, Automatic backwash control panel
, UL
®
and cUL
®
Labeled, in
a NEMA 4X fiberglass enclosure including: motor starter with thermal overload and short circuit
protection; fuseless branch and control circuit protection; transformer to convert primary supply to
24 and 120 VAC control power; through-the-door disconnect; programmable relay with program of
operation, 7-year battery backup and external memory card backup; HOA switch for pump motor;
differential pressure switch (external to the enclosure) for primary backwash initiation; manual
backwash initiation pushbutton; backwash counter; and contacts for ∆P repeat closure shut-off and
alarm, common alarm (motor trip indication), remote indication of backwash operation, remote
backwash initiation, and conductivity interface. Program features 30-second time delay in ∆P
switch circuit and 100 hour “re-setting” timer (∆P switch closure or manual initiation resets timer)
for backup backwash initiation.
___
Option:
Backwash lockout between/among ____ units; to prevent simultaneous backwash of multiple
filter units; 0-60 minute adjustable lockout time delay program; field connection between/
among control panels by others.
___
Option:
Contacts for connection to BMS, additional specifications required from owner.
___ local (lights) and remote (contacts) indication of filter or backwash operating mode.
___ other (be specific) _____________________________________________________.
___
Option:
Manual backwash; ___ single-phase; ___ three-phase.
MEDIA
___
Standard:
Quartzite or silica in nature, hard, not smooth, uniformity coefficient of 1.7, relative size of .45
to .55 mm, containing no more than 5% flat particles or more than 1% clay, loam dust, or other
foreign material. Media weighs 100 lbs per cubic foot.
COMMON ADDITIONAL EQUIPMENT:
NOZZLES
___
Sweeper-Eductor Nozzle
, 1/4" MPT, ABS plastic, quantity of _____.
HOLDERS
___
Clip-On Nozzle Holder
, quantity of _____; for ___ 1-1/4"; ___ 1-1/2"; or ___ 2" PVC pipe.
SURGE TANK
___
Polyethylene tank
for backwash surge capture and gravity release to closest drain:______ gallon capacity,
____" diameter x ____" high, with a ___" diameter lid in top head and a 2" FPT drain bulkhead fitting.
___
Bulkhead fitting, additional,
for inlet from filter ___ 2", ___3", or ___ 4", for field installed by others;
___
Manual ball valve
, 2", 2-way, ___ Sch 40 PVC, ___ Sch 80 PVC, ___ brass, for field installation by others
on drain piping from tank for isolation and/or throttling.
LIQUID LEVEL
___
Liquid level control assembly
for backwash surge tank to interrupt filter pump if/when surge tank nears
capacity. Includes: Gems Series 16M liquid level controller mounted in separate NEMA 3R enclosure requir
-
ing separate 120 V power supply factory mounted on filter’s control panel bracket (unless otherwise speci
-
ficed); sensor; 3 trimmable probes (L, H, and Ground); field wiring from sensor to LLC enclosure by others.
Also includes additional contacts for remote pump on/off in filter control panel.
___
Liquid level control column assembly
; 2” Sch 80 piping assembly mounted on side of poly tank to
isolate liquid level probes from turbulance in poly tank.
SOLENOID VALVE
___
Solenoid valve
for backwash siphon break, _____", bronze, with 24 VAC solenoid.
NOTE:
Backwash flow rate, irrespective of water source, must be no less than 75% and no greater than 100% of the vessel's
designed maximum gpm. Backwash duration is factory preset at 3 minutes and is field adjustable.
✔
✔