Hydro Action AP-500 Manual

Operation & Maintenance Manual
Table of Contents
Introduction
Section 1.0 Plant Routine Inspection and Service Instructions
Section 2.0 Operating Instructions
Section 3.0 Teflon Diffuser Inspection
Section 4.0 Plant Troubleshooting Guide
Section 5.0 Hydro-Action®AP-Series Plant Specifications
Section 6.0 Process Description
Section 7.0 Safety
Appendix 1: OPS Explanation Guide
Appendix 2: Hydro-Action®AP Series Pump Selection
Appendix 3: Technical Manual for Timers
Appendix 4: Electrical Controls Schematics
Appendix 5: Drawings
Appendix 6: Misc. Forms & Documents

Introduction
The AP Series Aerobic Treatment Units (ATUs)
are now available through Hydro-Action®.
Please read this introduction before reviewing
this manual.
Earth’s environment has purified water through
natural processes since the beginning of time.
Only recently, beginning in the Twentieth
Century, has man developed a system to
accelerate the processes that Mother Nature
uses. Hydro-Action®AP Series ATUs are just
such systems.
In 1916, the City of Houston, Texas, was the
first to use the activated sludge wastewater
treatment process as an accepted, full-scale
system process to purify domestic wastewater.
Since that time, the United States and many
other nations have utilized this process and
variations to properly treat sewage. Federal
Law 92-500 supports our nation’s commitment
to provide secondary treatment for all domestic
wastewater.
This commitment is presently being extended to
on-site sewage treatment facilities. Hydro-
Action® has been a visible part of this effort
since 1989. We have manufactured numerous
products to provide individuals with a means of
proper, effective, efficient, and affordable on-
site wastewater treatment. Our professional
commitment to market needs and customer
service have enabled us to reach our goal of
providing effective products that assure a safe,
reusable effluent. We are helping Mother
Nature protect our environment and our most
valuable natural resource: water.
Hydro-Action® AP Series Aerobic Treatment
Units are among the most advanced on-site
products available today. They are state-of-the-
art extended aeration, activated sludge
wastewater treatment facilities. The
improvements in these units make them not
only extremely efficient operational units but
also the most easily maintainable system in the
industry.
By following the instructions in this manual, you
will be providing yourself with the best on-site
wastewater treatment and service. We invite
you to share in our pride of the AP Series
Treatment Units.
This manual includes information on the AP-
500, LPA 500, AP-600, AP-750, AP-1000G &
AP-1500G wastewater treatment plants. These
units may be installed with either a platform
mounted OPS®(operations/control center) or a
Remotely Located OPS®.
Installation needs vary, so your on-site
wastewater system may contain some of the
following auxiliary components along with the
treatment plant:
• Pretreatment tank
• Pump/holding tank
• Alarm systems
• Equipment for chosen effluent disposal
method (drip irrigation, spray irrigation, gravel-
filled drain field, pressure dosing, etc.)
• Chlorinator / UV Disinfection Unit
The certified Hydro-Action® dealer or installer
of your Hydro-Action®AP Series wastewater
treatment plant is responsible for completing
and submitting to us the Installation Warranty
Information to properly activate your Hydro-
Action®Product Warranty.
We are eager to assist you with any questions
or problems. Please contact Hydro-Action® at
800.370.3749 to request assistance from our
Customer Service or Engineering Departments.

SECTION 1.0: Plant Routine Inspection
and Service Instructions
1.1: Each site should be inspected and serviced
by following these simple instructions. As each
site may have differences due to selected
disposal options, inspect each site facility to
determine which options are present then
proceed with the following instructions.
1.1.1: Upon arrival at the site, remove the
tamper-resistant screws from the Hydro-
Action®plant access cover and the
Platform Mounted OPS® or Remotely Located
OPS® enclosure. Then remove the access cover
and enclosure. Set the security screws and
covers in a protected place for later
reassembly.
1.1.2: Collect an activated sludge sample from
the aeration compartment. The sample size
should be approximately one quart. Collect the
sample as soon as possible; you can perform
other work while the solids are settling and
thereby reduce your inspection time at the site.
Use this sample to run the sludge volume test
(15 minutes settable solids ml/L test). To
perform this test a one-liter graduated cylinder
or any tall, straight-sided, clear glass container,
about one-quart in capacity, will be needed.
Divide the container into 10 equal parts using a
waterproof marker, thus signifying 0 to 100%.
a. Immediately after sample is collected, fill
graduated container to 100% mark.
b. Allow sample to stand for 15 minutes.
c. Measure sludge volume by locating interface
between clarified effluent and settled sludge on
graduations. Interface should be between the
20% and 60% marks, indicating a well-
functioning plant. Values less than 20% or
greater than 60% indicate there is a problem.
Sludge layer should be chocolate in color and
full of very small particles resembling small
pieces of sponge. Refer to the Hydro-Action®
Plant Condition Chart, section 4.12.
1.1.3: As turbulence in the aeration
compartment caused by the rising fine air
bubbles can be seen, observe any significant
changes in mixing and aeration characteristics.
If insufficient mixing or poor aeration is
observed, refer to Section 1.1.4a. All Diffuser
assemblies should appear to have equal
turbulence. This is an indication of proper
diffuser assembly and diffuser operation.
1.1.4: Proper aeration in the Hydro-Action®
AP-Series is maintained by performing the
following maintenance operations:
a. Clean or replace the air pump inlet filter
during routine inspections; inspect the aeration
compartment surface through the access port to
determine the amount of turbulence caused by
air coming from each diffuser assembly. All
Diffuser assemblies should appear to have
equal turbulence. This is an indication of proper
diffuser assembly and diffuser operation.
b. Locate the Schrader air pressure valve on
the PVC air pump discharge line. Unscrew the
protective cap and connect the quick chuck
pressure gauge. Read and record the pressure.
If the pressure equals or exceeds 3.5 psig, a
high pressure condition exists. After pressure
reading is complete, remove the quick-chuck
pressure gauge and replace the protective cap
on the Schrader air pressure valve.
1.1.5: To inspect, clean, or replace air diffuser
assemblies, refer to Section 3.0.
1.1.6: Using a clean, clear sample bottle catch
an effluent sample from the pump tank or other
discharge point. Effluent should have a non-
offensive odor and be clear in color. If results
differ from these refer to section 4.0, Plant
Troubleshooting Guide.
1.1.7: Check the surface of the clarification
compartment for floating solid or scum buildup.
If build-up is found, remove it using a small net
with very fine mesh and dispose of off-site
according to all federal, state, and local
regulations. (Material may be returned to
system upstream of plant through cleanout.)
Using a garden hose, spray a high-pressure
stream of water into clarifier, breaking up any
remaining floating solids. Clean any over spray
from the general area.

1.1.8: Activate liquid level alarm by raising and
lowering float in clarifier to test both audible and
visible alarms. Disrupt the air pressure by
disconnecting the air pressure tubing from the
electrical enclosure inside OPS® to test air
pressure alarms. If any problem is experienced
with alarm functions, make necessary
adjustments, corrections, and/or repairs. If
optional remote alarm has been installed, be
sure that its audible and visual alarms are also
working correctly.
1.1.9: The switch indicated “normal/silence” on
OPS® models 50-11, 20, -30 & -32 is used to
test the alarms, silence an alarm condition, or is
left in the normal on position. The normal
position of the mode is for normal operation of
the plant and silence is a mode that will disrupt
both the audible and visual alarm. Move the
switch to the left and hold to test the alarms.
The test switch will reset itself automatically.
These alarms should always be tested before
leaving the site to assure they are operational.
1.1.10: If optional effluent pump is included on
system, activate pump float switch to assure
effluent pump is operational; set and adjust
timers as required (if installed).
1.1.11: Reinstall Hydro-Action® access covers
being sure to install and tighten tamper-
resistant screws to prevent unauthorized plant
entry.
1.2: Each site visit requires an investigation of
the solids inventory within the wastewater
treatment plant and a determination of when
excess solids need to be removed from the
system. Follow these procedures in evaluating
solids inventory:
a. Hydro-Action® plant inspection and
service should be performed a minimum
of every six (6) months. This inspection
and service includes performing a
sludge volume test, which is an indicator
of plant performance. (Refer to section
4.0, Plant Troubleshooting Guide.)
b. When sludge volume in plant aeration
compartment reaches 60% to 80% it is
time to pump the plant and pretreatment
tank (if included). This is usually
necessary every two (2) to six (6) years.
1.3: Follow these procedures to pump the
sludge solids from the treatment tanks. A
qualified service technician should oversee the
work performed.
1.3.1: Remove the plant access cover.
1.3.2: Refer to installation worksheet to
determine which tanks and auxiliary equipment
are included on this particular installation (i.e.,
pretreatment tank, surge tank, pump tank,
access covers of different units). Remove pump
tank access cover (if included). If necessary,
use a shovel to dig down and expose the
pretreatment tank access covers and remove
them. Remove the clean-out adapter plug from
the outlet tee fitting. The tanks are now ready to
be pumped.
1.3.3: The suction hose should be positioned to
be very near the bottom of the tanks. Care
should be taken not to damage internal
components. The plant and other tanks should
be washed and cleaned while they are being
pumped. The waste from the tanks should be
disposed of in compliance with local, state, and
federal laws.
1.3.4: It is important that care is taken when
pumping plant and any other tank to assure that
hydraulic displacement of tanks (floating of
tanks) does not occur. Tank flotation may occur
whenever water and solids are removed from
the tank when high groundwater conditions
exist. Any source of water in the soil around the
plant installation could cause the tank to float.
Water sources may include rainfall, springs,
creeks, bayous, rivers, lakes, and coastal
areas.
Proper precautions are therefore required to
prevent tank flotation due to hydraulic
displacement. These precautions include, but
are not limited to, the following:
• Plant location —choose a site that will
minimize possible groundwater saturation.
Consider seasonal water table and soil
conditions in the area of installation. Do not
locate the plant in a low spot in the ground
where water tends to pool or at the edge of any
natural body of water. If such a location cannot
be avoided, call Hydro-Action® for technical
advice.

• Whenever a tank is pumped, do not remove
more than one-half of the capacity of the tank. It
is recommended that you pump the tank during
dry seasons only. However, if tank must be
pumped during the wet season, watch for
upward movement of the tank while pumping is
being done. If upward movement is detected
during pump, immediately stop pumping
water out of the tank and refill the tank to
stop flotation. Each site must be evaluated on
a case-by-case basis to determine the best time
to remove water from the tank and prevent
flotation.
1.3.5: Replace the pre-treat, plant access, and
pump tank access cover (if included), being
sure to reinstall and tighten the Hydro-Action®
tamper-resistant screws to prevent plant entry
of unauthorized personnel. Note: Plant and
other tanks should be filled with water before
leaving site.
1.4: Normal maintenance on the Hydro-
Action® AP Series plant will include:
Every Six (6) Months:
a. Maintaining aeration system and air diffusers.
b. Maintaining air pump.
c. Removing scum from clarifier.
d. Inspecting and testing plant alarms.
Every Two (2) to Six (6) Years:
e. Pumping excess sludge from plant.
Note 1: The owner has been informed that
replacement parts can be obtained from a
Hydro-Action®Certified Dealer.
Note 2: Pumping the plant is usually necessary
every two (2) to six (6) years; however, there is
no set time because loadings vary from
household to household. Access to the plant is
accomplished through the access opening,
which is at surface grade. When a Hydro-
Action® plant is being pumped, a qualified
service technician should oversee the job. The
waste from the plant must be disposed of in
compliance with all federal, state, and local
laws.
SECTION 2.0: Operating Instructions
2.1: The Hydro-Action® AP Series Plant has
been designed and built to provide efficient, and
reliable service. However, as with any individual
wastewater treatment plant, routine periodic
service is required. When proper preventive
maintenance is performed, the Hydro-Action®
plant will operate at designed performance
levels to give years of satisfactory treatment of
domestic wastewater.
2.2: Local Hydro-Action® Dealers are required
to perform all routine inspections for the first
two (2) years from the original date of
installation. At the time of inspection the plant
will be checked for proper operation. If a
problem exists, service will be performed at no
charge to the owner, unless the required
maintenance is not warranty related. At the end
of the two (2) year initial service period, the
local dealer will make available a continuing
service policy. This extended service is
available for a nominal fee.
2.3: The Hydro-Action® OPS®is equipped with
an alarm beacon and an audible horn alarm.
Also on the OPS® should be the name, address,
and telephone number of the local servicing
dealer. An optional remote alarm with audible
and visual alarms may also be present. Should
either alarm come on, the owner is instructed to
call the local dealer. After a power failure, if an
alarm remains on for more than 30 minutes the
owner is instructed to call the local dealer
immediately. To silence audible alarm while
waiting for service technician to arrive, owner
should locate the switch on outside face of the
OPS® enclosure labeled “normal/silence” and
push it to the “silence” (right) position. Visual
alarm beacon will remain illuminated.
2.4: The Hydro-Action® AP-Series Plant will
handle all domestic wastewater. The term
domestic wastewater refers to rapidly
biodegradable material. To keep maintenance
at a minimum and to prevent the plant from
malfunctioning, the following guidelines need to
be followed:

• Since aerobic bacteria are responsible for
treating the wastewater, inorganic or non-
rapidly biodegradable materials should not be
put into the plant. Examples of improper items
are: plastic products, rubber products, sanitary
napkins or tampons, washcloths, cigarette
butts, melon seeds, coffee grounds, egg shells,
matches, some food items such as corn husks,
grape vines, etc.
• Do not introduce cooking grease or large
amounts of oil into plant; instead pour it into a
container and dispose of it properly.
• To minimize pump-out frequency, limit use of
garbage disposals.
• Lint from lint catchers, hair, etc., should be
disposed of in the trash and not washed down
the drain.
• Water softener backwash should not be
routed through the system. Another source of
disposal should be used.
• Diapers can be rinsed out in the toilet;
however, do not flush cloth or disposable
diapers down the toilet.
• Large amounts of harsh chemicals, high
foaming detergents, disinfectants or any
substance that kills bacteria must not be
discharged into the plant.
• The plant will not perform to its fullest
capabilities if volumetric overload is allowed to
occur. This occurs whenever excessive water,
above the designed flow rate, is allowed into
the plant. Excessive water use or leaking
plumbing fixtures may cause this condition.
Hydro-Action® Dealers & Certified Technicians
are asked to inform homeowner of these
guidelines. Too often a malfunctioning
treatment unit is due to abuse that can be
avoided with simple education.
2.5: Other than for the mechanical and
structural working of the plant itself, Hydro-
Action® is not responsible for the in-field
operation of a plant. The proper operation of
this or any other individual wastewater plant
depends upon proper organic and hydraulic
loading of the plant. We cannot control the
loading and thereby control the amount of
harmful substances that may be discharged into
the plant. Only the users of a plant can control
what enters the unit. Therefore, we provide a
comprehensive owner’s manual that outlines
substances that should be kept out of the plant.
2.6: The Hydro-Action® AP-Series must be
installed and maintained according to factory
specifications. No modifications of equipment or
design are allowed. Modification of the plant will
void warranty and invalidate NSF certification of
plant.
2.7: OPS® models 50-30 or 50-32 include a
timer, which may need to be reset. The 50-30 is
a 24-hour, and the 50-32 is a micro-dose timer.
See the Technical Manual section of timers in
Appendix 3.
SECTION 3.0: Teflon Diffuser Inspection
3.1: With plant access cover removed, look
through the plant access opening. Inspect
system to insure even flow of diffused bubbles
are coming from each diffuser.
3.2: Locate the Schrader air pressure valve on
the PVC air pump discharge line. Unscrew the
protective cap and connect the quick chuck
pressure gauge. Read and record the pressure.
If the pressure equals or exceeds 3.5 psig, a
high pressure condition exists.
Note: Whenever a high pressure condition
exists in the Hydro-Action®diffuser airline
assembly it is usually due to a blockage. This
could be either inside the lines or bacterial
growth on the diffusers themselves.
3.3: To remedy a high pressure condition first
try to pressurize the airline with a high pressure
air compressor. This will displace any bacterial
growth on the diffusers themselves.
3.4: If the pressurizing of the lines does not
improve the pressure condition then the
diffusers may need to be replaced.
Note 2: Diffuser assemblies are normally not
replaced on the newer AP Series with the
Teflon diffusers. Older models will need retro-fit.

SECTION 4.0: Plant Troubleshooting
Guide
4.1: The Hydro-Action® AP Series plant has
proven to be very effective and reliable in the
treatment of domestic wastewater. The
problems outlined here occur only in a very
small percent of total installations. They can all
be corrected and most can be prevented.
4.2: When the owner/user calls, ask him or her
to describe the problem in detail and determine
the plant age and service history from your
records. This information is then used in
preparation for the service call.
4.3: First perform a routine service call as
described in section 1.0, Plant Routine
Inspection and Service Instructions.
4.4: If routine servicing does not solve the
problem, go through the steps listed below.
4.5: Verify model number of plant and OPS®
with those in records. If this is a new
installation, you should verify that the plant and
all its components were installed correctly and
in accordance with manufacturers and
regulatory agency requirements. See Hydro-
Action® AP Series Installation Manual,
available from Hydro-Action®.
4.5.1: Inspect plant to verify that the Hydro-
Action® plant is installed properly and is not
damaged. Plant should be level and internal
components should be in proper place and
correct working order.
4.5.2: Check to see that effluent disposal
method is allowing for proper level to be
maintained in plant. High level in plant can
adversely affect performance.
4.6: After confirming that Hydro-Action® plant
is installed properly and is not damaged, check
the operational and maintenance conditions of
the plant to determine if it is performing
correctly. To do this run a sludge volume test as
described in section 1.0. Compare your findings
with the conditions given in the Hydro-Action®
Plant Condition Chart, section 4.12. Follow the
recommended actions required to return the
plant to its proper operating conditions.
4.7: The alarms supplied with this wastewater
treatment plant provide the owner with a
secure, reliable and economical means of
notification for most malfunctions of the plant
that would lead to producing an unsatisfactory
effluent. These alarms include notification for
problems of air pump failure, aeration piping
malfunctions, and high water level. These
alarms need to be inspected and tested during
each plant operation and maintenance site visit.
If an optional remote alarm has been installed,
it should also be inspected and tested during
each site visit.
4.8: To gain access to the electrical controls
and air pump, remove the security screws
holding the OPS® enclosure to the base.
4.9: The switch indicated “normal/silence” on all
OPS® models is used to test the alarms, silence
an alarm condition, or is left in the normal on
position. The normal position of the mode is for
normal operation of the plant and silence is a
mode that will disrupt the audible alarm. Move
the switch to the left and hold to test the alarm.
You should see and hear the visible and
audible alarms when this mode is selected. The
OPS® switch will reset itself automatically.
4.10: If the audible and visual alarms on the
outside face of the Hydro-Action® OPS®
enclosure are indicated the problem might be
failure in power supply or air pump, or an
electrical short in the line between electrical
controls and air pump. See Appendix 2 & 5 for
electrical schematics and pump manuals.
4.11: The AP-Series plant is equipped with a
high-level float switch and alarm. If the system
also includes a pump/holding tank to remove
effluent, the Hydro-Action® electrical controls
may include a second high-level alarm. If the
owner reports high-level alarm light on, service
technician should be sent to correct the
problem. A malfunctioning water pump or level
float or a plugged discharge could cause the
high level conditions. A malfunctioning high-
level sensor float could give a false high-level
alarm. This problem left uncorrected will lead to
system failure and improper wastewater
treatment and therefore requires immediate
attention.

4.12: Hydro-Action® Plant Condition Chart
Hydro-Action®Condition
Organic
Over loading
Organic
Under loading
Toxic
Influent
Volumetric
Overloading
Well Functioning
Sludge Volume Test
Characteristics
Black particles
In sludge.
Sludge does not
settle well.
Chunks of
floating material
above main
sludge layer.
Solids do not
separate
from liquids well.
Very little
settling usually
5-10 %.
Septic odor.
Very little
settling.
Sludge
particles
are
very small.
Same
as
organic
under
loading.
20-60%
particles.
Particles
resemble
small
pieces
of sponge.
Color
Gray Black
Light Muddy
Gray
Grayish
Black
Light Muddy
Gray
Chocolate
Action needed
Diffuser stones
may need to
be changed
to increase
dissolved O2
level and
maintain
chocolate color.
If chocolate
color cannot
be maintained,
then the plant
will have to
be pumped.
(*3)
Look for
ways
to increase
organic
load.
Refrain
from
or reduce
the use of
toxic
substances.
(*2)
Reduce flow
of liquid to
designed GPD.
(*1)
None
*(1). Volumetric overloading (flow rate exceeds designed flow rate) could be caused by a
number of things. The most common are leaky toilets or faucets. Only sanitary waste (sinks,
tubs, washing machines, toilets, etc.) should be allowed in the Hydro-Action® plant. To check if
excess water is entering the plant, observe plant discharge point when house facilities are not in
use.
*(2). Find out if owner is using large amounts of chemicals such as unusual amounts of bleach,
disinfectants, photographic wastes, etc. Also check to see that water softener backwash is not
allowed in plant. This can cause a chemical imbalance and destroy needed bacteria. Backwash
should be routed to a separate disposal area. Any unusual types of waste not normally
associated with a household should be kept out.
*(3). When Hydro-Action® plant and pretreatment tank are being pumped, a qualified service
technician should oversee the job. Care should be taken not to damage internal components.
Plant and pretreatment tank should be washed and cleaned as they are being pumped. The
waste from the tanks should be disposed of in compliance with state and federal law. Hydro-
Action® recommends pumping the plant every 2 to 6 years; however, there is not a set time
because loading varies from household to household. Care should be taken when pumping
plant and pretreatment tank. Empty tanks can be hydraulically displaced (float tank) by ground
water. If soil is water-saturated tanks should not be completely emptied. Wasting sludge (solids)
can be accomplished without completely empty tanks.

SECTION 5.0 Hydro-Action®AP Series Plant Specifications.
Plant Capacities
Model
AP-500
LPA-
500
AP-600
AP-750
AP-
1000
AP-
1500
Design Flow (Gallons/Day)
500
500
600
750
1000
1500
CBOD5(Pounds/Day)
1.25
1.25
1.50
1.88
2.50
3.75
CBOD5(mg/l)
290
290
290
290
290
290
TSS (mg/l)
360
360
360
360
360
360
Hydraulic Capacity (Gallons)
Aeration Compartment
663
663
800
1002
1280
1895
Clarifier Compartment
173
173
219
273
352
518
Total Hydraulic Capacity
836
836
1019
1275
1632
2413
Hydraulic Retention Time
(Hours)
Aeration Compartment
32
32
31
29
29
25
Clarifier Compartment
8
8
9
9
8
8
Total Retention Time
40
40
40
38
37
33
Tank Dimensions
Diameter (in)
66
72
66
72
66
88
Height to Water Line (in)
64
46
64
64
70
82
Height with OPS Installed (in)
103.5
88
103.5
103.5
109
118
Compressor Usage
Rotary Compressor
1/4 HP
1/4 HP
1/4 HP
1/4 HP
3/4 HP
3/4 HP
Voltage (VAC)
115
115
115
115
115/120
115/120
Current (Amps)
3.9
3.9
3.9
3.9
7.8/3.9
7.8/3.9
Power (Watts)
120
120
120
120
120/560
120/560
Frequency (Hertz)
60
60
60
60
50
50
Flow (CFM)
4.3
4.3
4.3
4.3
8.2
8.2
Max Pressure (Psi)
5.0
5.0
5.0
5.0
7.0
7.0
Linear Compressor
HP80
HP80
HP100
HP120
HP150
HP200
Voltage (VAC)
120
120
120
120
120
120
Current (Amps)
0.059
0.59
1.55
2.1
2.1
1.75
Power (Watts)
71
71
186
252
252
210
Frequency (Hertz)
50
50
60
60
60
50
Flow (CFM)
2.9
2.9
4.5
4.5
4.5
8.2
Max Pressure (Psi)
5.0
5.0
5.0
5.0
7.0
7.0

SECTION 6.0: Process Description
6.1: The Hydro-Action® AP Series
individual wastewater treatment plant is a
self-contained, extended aeration, aerobic
treatment facility utilizing the activated
sludge process. The plant consists of a
cylindrically shaped aeration tank with an
offset service access, a unique cone
shaped clarification compartment and an
outlet tee-assembly. Three fine-bubble
Teflon diffuser assemblies and the Hydro-
Action® air pump are combined to provide
effective, efficient, and economical aeration.
6.2: Domestic wastewater enters the
aeration compartment and is mixed
thoroughly with the already present mixed
liquor suspended solids (MLSS) activated
sludge. The injection of air through the
porous Teflon air diffusers placed near the
bottom of the aeration chamber is
responsible for this complete mixing. The
fine-bubble diffusers and the vortex area
between diffuser assemblies produce a high
magnitude of air diffusion and therein
provide ample mixing and a more than
generous quantity of dissolved oxygen to
maintain the aerobic environment even
under extreme conditions.
6.3: Hydraulic displacement causes the
mixed liquor to enter the clarification
compartment and move upward toward the
outlet tee-assembly. Due to the calm
conditions in the clarifier, suspended solids
settle to the bottom where they are remixed
with the Mixed Liquor Suspended Solids
(MLSS) for additional biological treatment.
The remaining clarified effluent leaves the
plant via the outlet tee assembly and
discharge line.
6.4: The AP Series ATUs are operated by
the OPS®. The OPS®integrates the
electrical controls, visible and audible
alarms and air pump in a protective
polyethylene enclosure. The OPS®can be
either platform mounted on the plant or
remotely located. These features plus; the
offset access, flexible air hose, and Teflon
diffuser assemblies make the plant
extremely reliable and easy to service. An
optional visible and audible alarm may be
added to remotely locate to an area of your
choice.
6.5: The technology used in the Hydro-
Action® plant allows it to produce excellent
effluent quality, which thereby meets all
ANSI\NSF International Standard 40 class I
and the Environmental Protection Agency’s
requirements of a secondary treatment
process. NSF requires that a Class I plant
shall be shown to meet EPA secondary
treatment guidelines for CBOD5, TSS, and
pH. The Hydro-Action®AP Series ATUs
satisfy all these requirements.
SECTION 7.0: Safety
7.1: Safety is an important issue in our
business since we deal with one of the more
potentially health hazardous materials
known: raw sewage. Domestic wastewater
carries in it members of a specialized group
of life known as microorganisms. Such
microorganisms are bacteria, viruses, algae,
actinomycetes, protozoa, fungi, rotifers,
crustaceans, and other members of both the
plant and animal worlds. The function of a
wastewater treatment plant is to treat the
water to a degree that the effluent is
relatively free of pathogenic bacteria and
nuisance microorganisms. Until the
wastewater entering the plant has had
sufficient time for treatment and disinfection,
it may contain any number of the harmful
organisms that cause disease.
7.2: As raw wastewater may and usually
does contain some level of unsafe
microorganisms, proper respect and care
must be given to safety. When coming into
contact with raw sewage, do not fear the
contact, but do take proper precautions to
avoid potential danger.
7.3: Follow these simple safety precautions
whenever exposed to wastewater:
• Wear disposable rubber gloves when
handling wastewater contaminated items
or chlorine tablets.
• Always wash with soap and water after
handling any contaminated item. The use
of good bactericide soap is strongly
recommended.
• Always dispose of scum, rags, trash,
debris, or soiled material in a proper waste
container.

• If a wastewater spill or leak occurs in a
yard, flush area with plenty of clean water
and disinfect. If a spill or leak occurs in the
house, clean with a dilute solution of bleach.
• Treated effluent from a Hydro- Action®or
other treatment unit may still contain
harmful microorganisms. Careful attention
must be used when dealing with any form of
wastewater or effluent.
• If an illness or disease is suspected to
have come from exposure to sewage, get
proper medical attention immediately.
When proper treatment is given the remedy
and cure will be rapid and less of a problem.
There are some serious diseases that could
be transmitted by contact with raw sewage,
take the proper precautions and be safe!
• Report all accidents relating to sewage
exposure to the proper supervisory
personnel.

Appendix 1: OPS®Explanation Guide
50-11 Series OPS®Gravity
This OPS®provides total control of the aerobic unit
including air pump and alarms. Other features include
separate disconnect switch (which cuts off power to
all electrical components) with an optional lockout
feature. It requires a single circuit 120 volt / 20 amp
feed.
Typical Applications Include:
• Direct Discharge
• Gravity Flow to Gravel Drain Fields
• Gravity Flow to Leaching Chambers or any disposal
method where a pump is not required.
Equipment Included:
1 –Air Pump
1 –Polyethylene OPS®Base & Enclosure
1 –Electrical Control Panel
Small Components Include:
Wiring harnesses, electrical connectors, liquid tight
compression fittings, air tubing, shraeder valve,
audible alarm, visual alarm, and various other
components which provide for integration of the
OPS®.
50-20 Series OPS®On Demand
This OPS®provides total control of the aerobic unit
and pump tank including air pump, water pump and
alarms. Other features include two-branch circuit
breakers, separate disconnect switch (which cuts off
power to all electrical components) with an optional
lockout feature. It requires a single circuit 120 volt /
30 amp feed.
Typical Applications Include:
• Spray Irrigation
• Pumping to Gravel Drain Fields
• Pumping to Low Pressure Dosing Systems
• Pumping to Leaching Chambers or any disposal
method requiring a pump where timed dosing is not
required.
Equipment Included:
1 –Air Pump
1 –Polyethylene OPS®Base & Enclosure
1 –Electrical Control
Floats Switches Required:
1 –Water Pump On/Off Float
1 –Pump Tank High Level Alarm Float
Small Components Include:
Wiring harnesses, electrical connectors, liquid tight
compression fittings, air tubing, shraeder valve,
audible alarm, visual alarm, and various other
components which provide for integration of the
OPS®.
50-30 Series OPS®24 Hr. Time
This OPS®provides total control of the aerobic unit
and pump tank including air pump, water pump and
alarms. Other features include two-branch circuit
breakers, separate disconnect switch (which cuts off
power to all electrical components) with an optional
lockout feature and a 24 hr. timer. It requires a single
circuit 120 volt / 30 amp feed.
Typical Applications Include:
• Spray Irrigation
• Pumping to Gravel Drain Fields
• Pumping to Low Pressure Dosing Systems
• Pumping to Leaching Chambers or any disposal
method requiring a pump where 24 hr. –15 minute
increment timed dosing is required.
Equipment Included:
1 –Air Pump
1 –Polyethylene OPS®Base & Enclosure
1 –Electrical Control w/ 24 hr. –15 min. Timer
Floats Switches Required:
1 –Water Pump On/Off Float
1 –Pump Tank High Level Alarm Float
Optional Float Switch:
1 –Pump Tank Timer Override Float
Small Components Include:
Wiring harnesses, electrical connectors, liquid tight
compression fittings, air tubing, shraeder valve,
audible alarm, visual alarm, and various other
components which provide for integration of the
OPS®.
50-32 Series OPS®Micro-Dose
This OPS®provides total control of the aerobic unit
and pump tank including air pump, water pump and
alarms. Other features include high-level override,
two-branch circuit breakers, separate disconnect
switch (which cuts off power to all electrical
components) with an optional lockout feature with a
fully adjustable repeat cycle (micro-dosing) timer. It
requires a single circuit 120 volt / 30 amp feed.
Typical Applications Include:
• Drip Irrigation
• Pumping to Gravel Drain Fields
• Pumping to Low Pressure Dosing Systems
• Pumping to Leaching Chambers or any disposal
method requiring a pump where micro-dosing is
desired with single float high level override / high level
alarm.
Equipment Included:
1 –Air Pump
1 –Polyethylene OPS®Base & Enclosure
1 –Electrical Control w/ Micro-dosing Timer
Floats Switches Required:
1 –Water Pump On/Off Float
1 –Pump Tank High Level Alarm Float/Timer
Override Float
Small Components Include:
Wiring harnesses, electrical connectors, liquid tight
compression fittings, air tubing, shraeder valve,
audible alarm, visual alarm, and various other
components which provide for integration of the
OPS®.

Appendix 2: Hydro-Action®AP Series Pump Selection
Note: Please see Hydro-Action®Pump Manual for each manufacturer OEM Manual
Description of AP Series Compressor Pumps
The Hydro-Action®AP Series ATU’s have several approved types of compressor pumps
available. NSF has approved these models and by no means does Hydro-Action®condone the
use of any other replacement pump not included on this list. Hydro-Action® uses three which
are; Hi-blow Linear, Gast Linear, and Gast Rotary Vane…
AP Series
Hi-Blow
Gast
Gast
Model
Linear
Linear
Rotary
AP500
HP-80
DBMS80
AT05-101
LPA500
HP-80
DBMS80
AT05-101
AP600
HP-100 LL
DBMS100
AT05-101
AP750
HP-120LL
DBMS120
AT05-101
AP1000
HP-150
DBMX150
1023-101
AP1500
HP-200
DBMX200
1023-101
Description of AP Series Effluent Pumps
The Hydro-Action®AP Series utilize many effluent pumps. NSF does not regulate the pump
tank component of NSF std. 40 systems unless it is a component of treatment. Therefore, any
comparable pump may be used. Hydro-Action®currently uses Barnes for its standard pump
and the mid-suction Hydromatic for all drip irrigation applications. See manuals below for
information.
AP Series
Barnes
Hydromatic
Model
Standard
SP-33
HE 20-51
Drip Application
High Head 1/2 HP
HE 12-51
High Flow 1/2 HP
HE 30-51
High Head 1 HP
HE 25-10
High Flow 1 HP
HE 35-10

Appendix 3: Technical Manual for Timers
Grasslin 24 Hr. Timer
Omeron Micro-Dose Timer

FM/1 Series
Time Switches
TECHNICAL DATA
Supply Voltage: 24, 120 and 240VAC, 60Hz models
Quartz: 24V AC/DC, 120 and
240VAC 50/60 Hz
Switch Type: SPDT
Switch Rating: 21A/250VAC resistive
1350 watt tungsten
1HP @ 125VAC
2HP @ 240VAC
Power
Consumption:
24V: 0.1VA; 120V: 0.5VA; 240V: 1.0VA
Ambient
Temp. Range: –40°F to 180°F, synchronous units
–20°F to 140°F, quartz units
Terminals: 1/4” spade terminals
Reserve Carryover: 7 days for quartz units
Weight: Approximately 3 oz.
NOTE: 24V quartz unit will operate on 6VDC, 12VDC,
or 24VDC
APPLICATIONS
The FM/1 series of time switches are designed for control of
heating, ventilating, air conditioning, refrigeration, lighting,
security, circulating pumps, spas or any electrical load requir-
ing 24-hour or 7-day scheduling.
WIRING
Verify input voltage stated on back of unit. Use 1/4” quick con-
nects and make connections in accordance with the wiring
diagram shown and applicable code requirements. When
using 24V units, it is important to use transformers that will
supply the required 24 volts AC to terminals 1 & 2.
MOUNTING
The standard FM/1 units can be flush mounted (mounting kit
with screws available) or surface mounted inside a panel. A
printed circuit board mounting base is also available. An
indoor or outdoor enclosure is available for stand-alone
mounting. In addition, unit is also available in DIN housing for
flush or surface mounting (see MIL72, Digi 20 or Digi 42 data
sheets). Optional clear plastic dust cover is available.
Terminal Connections
Contacts shown in “Off” position (trippers pushed inward)
“On” position (trippers pushed outward) will close contacts 3 & 4
45 3 1
M
INPUT
COM
NO
NC
2

TIME SETTING
TO SET THE CURRENT TIME (AND DAY OF WEEK
ON 7 DAY UNITS), TURN THE MINUTE HAND
CLOCKWISE. DO NOT SET THE TIME BY ROTAT-
ING “OUTER” DIAL.
Turn the minute hand clockwise until the day of the week
(7-day timer) and the time of day on the outer dial is
aligned with the triangle marker on the inner dial (two
o'clock position).
Example for 7-day program dial Monday 10:30 AM. Turn the
minute hand clockwise until Monday 10:30 AM is aligned
with the triangle on the inner dial. The hour and minute hand
will show exactly 10:30.
Example for 24-hour program dial 10:30 AM. Turn the minute
hand clockwise until 10:30 AM is aligned with the triangle on
the inner dial. The hour and the minute dial will show exact-
ly 10:30.
PROGRAMMING
7-Day (SW, QRW Models)
The weekly program dial reflects the seven days of the week
and AM/PM imprints for each day.
The time switch is programmed by pushing the captive trip-
pers to the outer ring position for the entire period that the
load is to be turned “ON”, i.e., two hours for each tripper on
the 7-Day dial. When the tripper is pushed to the inside, the
switch is in the “OFF” position.
24-Hour (ST, QRT Models)
The 24-Hour dial has quarter-hour divisions and AM/PM indi-
cations.
The time switch is programmed by pushing the captive trip-
pers to the outer ring position for the entire period that the
load is to be turned “ON”, i.e., fifteen minutes for each trip-
per on the 24-Hour dial. When the tripper is pushed to the
inside, the switch is in the “OFF” position.
PROGRAMMING WITH MANUAL
OVERRIDE SWITCH
AUTOMATIC MODE
In order to operate the time switch module in the automatic
mode, the manual switch must be in the center position (auto-
matic) - see diagram.
MANUAL MODE
With the manual switch selector lever the selected programs
can be overridden. In the lower position, marked “O”, termi-
nals 3 and 5 are permanently closed. In the upper position,
marked “I”, terminals 3 and 4 are permanently closed (see
diagram).
300GR10020
Override Mode
3-way manual
override switch
I = permanent ON
= automatic
0 = permanent OFF
Dimensions
FM/1 synchronous/quartz
Intermatic Incorporated • Spring Grove, IL 60081 • www.intermatic.com

Electromechanical Timer Modules
93
FM/1 Series Ordering Data†
Grasslin
Model
Intermatic
Model Override Switch Program Carryover Program On/Off Every
Minimum
On/Off Time
Switch Output
Type
Switch Output
Rating
FM/1 STuZ-120 FM1STUZ-120U No 24 Hr. No 15 Minutes 15 Minutes SPDT 21A. Res.
FM/1 STuZ-24 FM1STUZ-24U No 24 Hr. No 15 Minutes 15 Minutes SPDT 21A. Res.
FM/1 STuZ-240 FM1STUZ-240U No 24 Hr. No 15 Minutes 15 Minutes SPDT 21A. Res.
FM/1 SWuZ-120 FM1SWUZ-120U No 7 day No 2 Hours 2 Hours SPDT 21A. Res.
FM/1 SWuZ-24 FM1SWUZ-24U No 7 day No 2 Hours 2 Hours SPDT 21A. Res.
FM/1 SWuZ-240 FM1SWUZ-240U No 7 day No 2 Hours 2 Hours SPDT 21A. Res.
FM/1 STuZH-120 FM1STUZH-120U Yes 24 Hr. No 15 Minutes 15 Minutes SPDT 21A. Res.
FM/1 STuZH-24 FM1STUZH-24U Yes 24 Hr. No 15 Minutes 15 Minutes SPDT 21A. Res.
FM/1 STuZH-240 FM1STUZH-240U Yes 24 Hr. No 15 Minutes 15 Minutes SPDT 21A. Res.
FM/1 SWuZH-120 FM1SWUZH-120U Yes 7 day No 2 Hours 2 Hours SPDT 21A. Res.
FM/1 SWuZH-24 FM1SWUZH-24U Yes 7 day No 2 Hours 2 Hours SPDT 21A. Res.
FM/1 SWuZH-240 FM1SWUZH-240U Yes 7 day No 2 Hours 2 Hours SPDT 21A. Res.
FM/1 SWuZH-277 FM1SWUZH-277U Yes 7 day No 2 Hours 2 Hours SPDT 21A. Res.
FM/1 QTuZH-120 FM1QTUZH-120U Yes 24 Hr. 7 day 15 Minutes 15 Minutes SPDT 21A. Res.
FM/1 QTuZH-24 FM1QTUZH-24U Yes 24 Hr. 7 day 15 Minutes 15 Minutes SPDT 21A. Res.
FM/1 QWuZH-120 FM1QWUZH-120U Yes 7 day 2 Hr. 2 Hours 2 Hours SPDT 21A. Res.
FM/1 QWuZH-240 FM1QWUZH-240U Yes 7 day 2 Hr. 2 Hours 2 Hours SPDT 21A. Res.
Available with 24V, 120V, 240V, 277VAC input
Features:
• 21A SPDT switch
• Captive Trippers
• 1/4” quick terminals
• Noise Immune—Ideal for
robust applications
FM/1 Series
24 Hour, 7 Day
APPLICATION: The FM/1 series electromechanical timer modules are designed to be placed inside a
machine control panel, circuit board, or other equipment. It offers up to 21A switching designed for control
of heating, ventilating, air conditioning, refrigeration, lighting, security, circulating pumps, spas or any
electrical load requiring 24-hour or 7-day scheduling.
Specifications:
Size: 2.36” x 2.36” x 1.25”
Supply Voltage: 24, 120, 240VAC
Power Consumption: 1 VA
Switch Rating: SPDT
Resistive: 21A
Tungsten: 1350W
Inductive: 1HP @ 120VAC
2HP @ 240VAC
Wiring Connections: 1/4” quick-connects
Installation: Stand Alone: With indoor or outdoor
enclosure
Panel: Surface mounting
WEATHERPROOF • ENERGYCONTROLS • PROFESSIONALLIGHTING • POOL&SPA • SURGEPROTECTION • CONSUMER

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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
Solid-state Twin Timers
H3CR-F
DIN 48 ×48-mm Twin Timers
• Wide power supply ranges of 100 to 240 VAC and 48 to
125 VDC respectively.
• ON- and OFF-times can be set independently and so
combinations of long ON- or OFF-time and short OFF- or ON-
time settings are possible.
• Fourteen time ranges from 0.05 s to 30 h or from 1.2 s to 300 h
depending on the model to be used.
• Models with a flicker ON start or flicker OFF start are available.
• Easy sequence checks through instantaneous outputs for a
zero set value at any time range.
• Length, when panel-mounted with a Socket, of 80 mm or less.
• 11-pin and 8-pin models are available.
Model Number Structure
■Model Number Legend
Ordering Information
■List of Models
H3CR - F @@- @@
123 54
1. Classification
F: Twin timers
2. Configuration
3. Twin Timer Mode
4. Time Range
None: 11-pin socket
8: 8-pin socket
None: Flicker OFF start
N: Flicker ON start
5. Supply Voltage
None: 0.05 s to 30 h models
300: 1.2 s to 300 h models
100-240AC: 100 to 240 VAC
24AC/DC: 24 VAC/VDC
12DC: 12 VDC
48-125DC: 48 to 125 VDC
Operating
modes
Supply
voltage
0.05 s to 30 h models 1.2 s to 300 h models
11-pin models 8-pin models 11-pin models 8-pin models
Flicker OFF
start
100 to 240 VAC H3CR-F 100-240AC H3CR-F8 100-240AC H3CR-F-300 100-240AC H3CR-F8-300 100-240AC
24 VAC/DC H3CR-F 24AC/DC H3CR-F8 24AC/DC H3CR-F-300 24AC/DC H3CR-F8-300 24AC/DC
12 VDC H3CR-F 12DC H3CR-F8 12DC H3CR-F-300 12DC H3CR-F8-300 12DC
48 to 125 VDC H3CR-F 48-125DC H3CR-F8 48-125DC H3CR-F-300 48-125DC H3CR-F8-300 48-125DC
Flicker ON start 100 to 240 VAC H3CR-FN 100-240AC H3CR-F8N 100-240AC H3CR-FN-300 100-240AC H3CR-F8N-300 100-240AC
24 VAC/DC H3CR-FN 24AC/DC H3CR-F8N 24AC/DC H3CR-FN-300 24AC/DC H3CR-F8N-300 24AC/DC
12 VDC H3CR-FN 12DC H3CR-F8N 12DC H3CR-FN-300 12DC H3CR-F8N-300 12DC
48 to 125 VDC H3CR-FN 48-125DC H3CR-F8N 48-125DC H3CR-FN-300 48-125DC H3CR-F8N-300 48-125DC
Note: Specify both the model number and supply voltage when ordering.
Example: H3CR-F 100-240AC
Supply voltage

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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
H3CR-F
■Accessories (Order Separately)
Note: 1. Y92A-48G is a finger safe terminal cover which is attached to the P3G-08 or P3GA-11 Socket.
2. Hold-down Clips are sold in sets of two.
Specifications
■General
■Time Ranges
0.05 s to 30 h Models
Note: Instantaneous output is available at any time range. To obtain instantaneous output, set to below 0.
1.2 s to 300 h Models
Note: Instantaneous output is available at any time range. To obtain instantaneous output, set to below 0.
Name/specifications Models
Flush Mounting Adapter Y92F-30
Y92F-73
Y92F-74
Mounting Track 50 cm (l)×7.3 mm (t) PFP-50N
1 m (l)×7.3 mm (t) PFP-100N
1 m (l)×16 mm (t) PFP-100N2
End Plate PFP-M
Spacer PFP-S
Protective Cover Y92A-48B
Track Mounting/
Front Connecting Socket
8-pin P2CF-08
8-pin, finger safe type P2CF-08-E
11-pin P2CF-11
11-pin, finger safe type P2CF-11-E
Back Connecting Socket 8-pin P3G-08
8-pin, finger safe type P3G-08 with Y92A-48G (See note 1)
11-pin P3GA-11
11-pin, finger safe type P3GA-11 with Y92A-48G (See note 1)
Hold-down Clip (See note 2) For PL08 and PL11 Sockets Y92H-7
For PF085A Socket Y92H-8
Item H3CR-F H3CR-F8 H3CR-FN H3CR-F8N
Operating mode Flicker OFF start Flicker ON start
Pin type 11-pin 8-pin 11-pin 8-pin
Operating/Reset method Time-limit operation/Time-limit reset or self-reset
Output type Relay output (DPDT)
Mounting method DIN track mounting, surface mounting, and flush mounting
Approved standards UL508, CSA C22.2 No.14, NK, Lloyds
Conforms to EN61812-1 and IEC60664-1 (VDE0110) 4kV/2.
Output category according to EN60947-5-1.
Time unit s (sec) ×10 s (10 sec) min (min) h (hrs)
Setting 1.2 0.05 to 1.2 1.2 to 12 0.12 to 1.2
3 0.3 to 3 3 to 30 0.3 to 3
12 1.2 to 12 12 to 120 1.2 to 12
30 3 to 30 30 to 300 3 to 30
Time unit ×10 s (10 sec) ×10 min (10 min) h (hrs) ×10 h (10 hrs)
Setting 1.2 1.2 to 12 1.2 to 12 0.12 to 1.2 1.2 to 12
3 3 to 30 3 to 30 0.3 to 3 3 to 30
12 12 to 120 12 to 120 1.2 to 12 12 to 120
30 30 to 300 30 to 300 3 to 30 30 to 300