SEC AMERICA 933 Sentry Battery Backup System for Sump Pumps Owner’s Manual
- September 18, 2024
- SEC AMERICA
Table of Contents
933 Sentry Battery Backup System for Sump Pumps
Specifications:
-
Model: 933 Sentry / Model 1733 Sentry
-
Output: Sine wave output
-
External Battery: 12V nominal terminal voltage, up to 250 A-hr
rating -
Max Load:
- Model 933 Sentry: 10 Amps running, 25 Amps startup surge
- Model 1733 Sentry: 15 Amps running, 45 Amps startup surge
-
Recharge Time: 26-60 hours for batteries of 100 A-hr to 250
A-hr -
Battery Type: Deep cycle batteries (BCI group size 27 or
larger)
Product Usage Instructions:
Installation:
The Sentry is a high-quality power station designed to handle
various loads within its specifications. Follow these steps for
installation:
-
Ensure the external battery or battery bank meets the specified
requirements. -
Install deep cycle batteries conforming to BCI group size 27 or
larger in a suitable battery box. -
Use only the supplied cables for connection, ensuring proper
terminations.
Quick Functional Test:
To verify proper installation:
- Plug in a load and turn on the Sentry.
- Disconnect the plug from the wall outlet; the Sentry should
continue to operate.
Usage:
The Sentry provides electricity during power outages. Follow
these guidelines for optimal use:
-
Ensure installation is done by knowledgeable individuals or
licensed electricians. -
Read and follow the user manual instructions carefully.
FAQ:
Q: What type of batteries should be used with the Sentry?
A: Deep cycle batteries conforming to BCI group size 27 or
larger are recommended. Do not use car batteries or lithium.
Q: How long does it take to recharge the batteries?
A: Recharge time varies from 26 to 60 hours depending on the
battery capacity.
SEC
SEC America Corp.
Model 933 Sentry / Model 1733 Sentry Owner’s Manual
July 20, 2023
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Index
Quick Installation & Battery Essentials………………….. Precautions and Sequencing
During Initial Hookup…. Quick Functional Test……………………………………… How the Sentry
Works……………………………………. Important Safety Instructions………………………………. Safety
Warnings……………………………………………… Battery Precautions………………………………………….. Battery
Box……………………………………………………. Installation Location…………………………………………. Making
Connections…………………………………………. Installation Test………………………………………………. Changing the
Battery………………………………………… Charger Functions……………………………………………. Uninterruptible
Power Indicator …………………………… Fan Operation ………………………………………………… How to Discern
when Sentry is Operational in Back Up Mode …………………………… How to Discern when
Sentry is Operational in Standby Mode …………………………… Fuses
…………………………………………………………… Audible Alarm ………………………………………………….
Warranty………………………………………………………..
Page 3 4 5 6 6 7 8 9 9 10 11 12 13 14 14
16
16 16 16 17
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Models 933 / Model 1733 SENTRY INSTALLATION INSTRUCTIONS
QUICK INSTALLATION & BATTERY ESSENTIALS The Sentry is a high quality power
station that generates a sine wave output that will handle any type of load
within its rating specifications.
The Sentry is designed to operate with an external battery or battery bank
whose nominal terminal voltage is 12V, and whose single or combined A-Hr.
rating does not exceed 250 A-hr. The load on the 933 sentry should not exceed
10 amps running and a 25 amps startup surge rating. The load on the 1733
sentry should not exceed 15 Amps running with a 45 amps startup surge.
A full recharge will take 26 hours to 60 hours for batteries of 100 A-hr. and
250 A-hr. respectively. The sentry will maintain batteries at full charge
while electricity is available. See page 11 of this manual to learn more about
the charger function indicators.
BATTERY TYPE Only batteries conforming to Battery Council International (BCI)
group size 27 or larger are recommended (up to size 31). INSTALL ONLY deep
cycle batteries. (wet cell or AGM type) The marine-variety is acceptable. DO
NOT use car batteries or lithium.
BATTERY BOX Your selected battery(ies) should be installed in a high quality
plastic or metal battery box that comes with a lid that is designed for said
box. It is available at the point of battery purchase.
BATTERY CABLES Use only the cables furnished with the Sentry that are packaged
in its carton. They are equipped with the terminations necessary for reliable
and solid connection. The ends with the blade terminals mate with the RED and
BLACK battery cable connectors on the Sentry, while the other ends are
furnished with ring terminals designed to fit over the wing nut posts of most
batteries.
3
PRECAUTIONS & SEQUENCING DURING INITIAL HOOKUP a) Secure the Sentry in its
designated spot. It is recommended that the unit be placed on a shelf or
mounted to a wall. b) Make sure the ON/OFF switch is in the OFF position and
that the Sentry power cord is not plugged into an AC outlet. c) Connect the
blade end of the red battery cable supplied with the unit into the red
terminal block located adjacent to the fan air intake port. Tighten the set
screw of the block till the cable is well secured. d) Perform the sequence in
(c) with the black cable into the black terminal block located adjacent to the
red one. e) Slide the battery into its protective box and place into its
designated spot sufficiently close to the Sentry to allow the battery cables
to reach. DO NOT USE LONGER CABLES THAN THOSE SUPPLIED WITH THE SENTRY as this
may adversely affect the time available for backup operation. f) Connect the
ring terminal end of the BLACK battery cable to the battery NEGATIVE terminal.
g) Connect the ring terminal end of the RED battery cable to the battery
POSITIVE terminal. WARNING: WHEN DOING THIS STEP THERE WILL BE A PERCEPTIVE
SPARK AT THE TERMINAL AS SOME COMPONENTS IN THE SENTRY CHARGE UP. THIS IS
NORMAL. h) Once (g) is completed cover your battery box and secure the lid. i)
Plug the appliance into the Sentry. j) Plug the Sentry into a wall outlet
which has a minimum capacity of 15A. k) Turn ON the ON/OFF switch located to
the left of the fan air intake port. This has been achieved when the bottom of
the rocker has been depressed and the top of the rocker reveals a red surface.
The ON/OFF switch only disables the battery backup function. The Sentry always
allows power from your power outlet to your appliance regardless of the switch
position. Therefor upon installation completion, ensure the switch is ON or
else there will be no backup function. The switch is ON when the red portion
of its rocker is visible. l) Installation is complete.
4
QUICK FUNCTIONAL TEST To make sure the installation is good; it should be
tested per the following:
a) Plug a load such as a lamp into the sentry with its switch in the ON
position. Also turn ON the switch on the sentry with the top of the rocker
showing red. See Figure A.
b) Disconnect the Sentry’s plug, mentioned in (j), from the wall outlet. After
a slight pause, your Sentry should continue to operate. If it does not, review
steps (a) though (l) on page 4.
Fig. A
The Sentry is an innovative power station designed to provide electricity to
an appliance during a power outage. When properly installed, it will provide
many years of reliable service.
To ensure that the Sentry is optimally used and properly connected, we
recommend that its installation be made by individuals familiar with this user
manual or a licensed electrician. Read these instructions completely and
follow directions carefully.
Pump
Models 933/1733
+ 12 Volt –
Battery
AC Utility Power
Figure 1
5
How the Sentry Works
When electricity is present, the Sentry charges a 12-volt battery (bank) and
surveys the power line. At the instant that a power failure occurs, the Sentry
converts the energy stored in the battery to AC power to operate your
appliance. When AC utility power is restored, the Sentry automatically
switches your appliance back to AC utility power, recharges the battery, and
monitors the power line. While the Sentry is a sophisticated electronic
device, it should not be expected to perform beyond its limitations, and
extreme care should be taken to insure safe operation within specifications.
IMPORTANT SAFETY INSTRUCTIONS
READ AND SAVE THESE INSTRUCTIONS THIS MANUAL CONTAINS IMPORTANT INSTRUCTIONS
FAILURE TO FOLLOW SAFETY INSTRUCTIONS AND WARNINGS COULD RESULT IN INJURY OR
DEATH
Read all the instructions before installing or operating the Sentry. ALWAYS
disconnect batteries and AC power source from the Sentry before storing,
handling, or making any adjustments to the unit. Use Sentry only as described
in this manual. Any other use not recommended by the manufacturer may cause
fire, electric shock, or injury. Do Not sit or stand on the Sentry unit. Keep
children away! Do Not place objects on the Sentry unit or allow vents to
become blocked. Do Not smoke, use sparking electrical devices, or allow open
flame near the unit while working with it. Do Not install the Sentry in
locations classified as hazardous per N.E.C. ANSI/NFPA 70 1984.
WARNING: ELECTRICAL SHOCK HAZARD
This unit has not been evaluated for use outdoors. Never operate the Sentry
outdoors. Never operate the Sentry with battery enclosure open. Never operate
the Sentry in a wet location.
6
Never operate the Sentry in a location where liquid or moisture will come in
contact with, splash, or drip into unit. Do Not insert or allow foreign
objects to enter any ventilation or exhaust opening as this may cause
electrical shock and/or fire hazard.
WARNING: RISK OF ELECTRICAL SHOCK
In the event of a short circuit, grounding reduces the risk of electrical
shock by providing a safe path to ground. The Sentry must be properly
grounded.
The Sentry is equipped with a cord having a ground wire with an appropriate
three pronged plug. The plug must be used with an outlet that has been
installed and grounded in accordance with all local electrical codes and
ordinances. Where a two pronged wall outlet is encountered, it must be
replaced with a three pronged outlet by a qualified Electrician to reduce the
risk of shock, the third prong must NOT be cut off the plug. DO NOT attempt to
defeat this safety feature. Use Sentry only with adequate wiring that is up to
electrical code specifications. Connect to properly grounded outlets only.
WARNING: RISK OF ELECTRICAL SHOCK
The Sentry is capable of, and intended to generate electrical voltage when
unplugged from a wall outlet or when AC power is shut off.
Because Sentry uses batteries to generate 120 volts of AC power, both the
batteries and the power cord must be disconnected to neutralize the Sentry.
Failure to disconnect both the batteries and the power cord could result in
electrical shock sufficient to cause injury or death
FAILURE TO COMPLY WITH THE ABOVE WARNINGS COULD RESULT IN INJURY OR DEATH
7
BATTERY PRECAUTIONS:
WARNING: IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS.
1. Servicing of batteries should be performed or supervised by a person
knowledgeable about batteries and the required precautions. Keep unauthorized
personnel away from batteries.
2. When replacing batteries, use only models conforming to Battery Council
International (BCI) specifications for Group size 27 or larger Deep Cycle
Marine batteries.
Larger BCI group sizes and multiple-battery arrays may also be used to
increase backup longevity.
3. CAUTION Do Not dispose of batteries in a fire. The batteries might
explode.
4. CAUTION Do Not open or mutilate the batteries. Released electrolyte is
harmful to skin and eyes CAUTION A battery can present a risk of electrical
shock and high short circuit current. The following precautions should be
observed when working on batteries.
A. Remove Watches, Rings, and other Jewelry and metal objects. B. Use tools
with insulated handles. C. Do Not lay tools or metal objects on top of
batteries. D. Wear safety goggles and a face shield.
5. CAUTION The electrolyte is a diluted sulfuric acid mixture that is
Corrosive and harmful to the skin and eyes. It is also electrically
conductive. Observe the following rules when working with the electrolyte
solution. A. Wear full eye protection and clothing. B. If electrolyte comes in
contact with the skin, wash if off immediately. C. If electrolyte comes in
contact with the eyes, flush thoroughly with water and seek medical attention
immediately.
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6. CAUTION Lead acid batteries can present a risk of fire and explosion
because they generate hydrogen gases. The following precautions must be
followed. A. Do Not smoke when near batteries. B. Do Not cause sparks or allow
open flame in the battery area. C. Discharge static electricity from your body
and clothing before touching batteries by first touching a grounded surface.
7. See Battery Manufacturers’ installation manual for additional safety and
maintenance instructions.
BATTERY BOX Your selected battery should be stored in a high quality plastic
or nylon battery box with a lid that is designed for this purpose. LOCATION
In a typical installation, the Sentry should be mounted on the wall, above the
sump pit or crock, and in accordance with all applicable local electrical
codes.
It should be in close proximity to a grounded AC outlet and the battery box
(not closer than 2 feet).
9
VENTILATION
Do Not block either the fan or the exit air ports of the Sentry. Allow at
least 2 inches of air clearance on all sides. Any room in which the Sentry is
mounted should have adequate ventilation.
WARNING! The Sentry has several components with electrical contacts that
switch electrical currents. Opening or closing any of these electrical
contacts can produce a spark that could ignite an explosive air mixture. To
prevent fire or explosion, do not install the Sentry in any area which might
contain flammable liquids or gases. Do not install Sentry in the same confined
area as the battery box.
UNDER NO CIRCUMSTANCES Should the Sentry be mounted in a confined space.
Sentry is not only an electrical appliance, but also produces a potentially
dangerous and hazardous electrical current even during a power outage. It is
safe when installed and used properly.
Keep children away.
MAKING CONNECTIONS
After mounting Sentry to the wall, follow these steps. Make sure the ON/OFF
switch is in the OFF position. Connect the red battery cable to the Red
(Positive) + terminal of the Sentry. Connect the black battery cable to the
Black (Negative) terminal of the Sentry.
WARNING! DO NOT REVERSE THESE CONNECTIONS. DAMAGE TO THE APPLIANCE SENTRY WILL
OCCUR AND YOU WILL VOID THE WARRANTEE.
10
WARNING! A spark may occur when connecting the second cable. This is normal.
An explosion hazard may exist if flammable liquid or gas is present. INSTALL
AND OPERATE SENTRY IN A WELL VENTILATED AREA ONLY.
Plug your appliance into the Sentry’s AC outlet. Plug the Sentry into a 120
volt AC outlet. Turn ON/OFF switch to the ON position. INSTALLATION TEST After
making the connections as instructed above, cycle the appliance to ensure its
operation under normal conditions. Remove power cord from the AC wall outlet
to simulate a power failure. The fan will not necessarily be activated. It is
thermostat controlled and will turn only when the temperature of the wall of
the sentry exceeds 45C (113F). Cycle the appliance to ensure operation in
“battery backup” mode. Plug the Sentry AC power cord back into the wall
outlet. Cycle the appliance. Note that after 2 seconds at least one of the
Battery Monitor LEDs has lit. This is normal and is an indication that the
Sentry has recognized the return of normal AC power. The Sentry is no longer
in “battery backup” mode and has returned to its normal state of charging the
battery and providing line power.
11
CHANGING THE BATTERY If for any reason the battery needs changing, it is
important to follow the steps below, in the order shown to avoid damage to the
Sentry unit.
1. Turn the ON/OFF switch on the Sentry to the OFF position. 2. Unplug the
input power cord of the Sentry from the AC outlet. 3. Unplug the input power
cord of the appliance from the AC outlet on
the Sentry. 4. Disconnect the battery cables from the battery. CAUTION: MAKE
SURE THAT THE SENTRY IS DISCONNECTED FROM AC POWER BEFORE DISCONNECTING
BATTERY CABLES. 5. Replace the battery. 6. Reconnect the Sentry following the
steps under the heading MAKING CONNECTIONS. MAINTENANCE Once properly
connected, the Sentry requires no maintenance. When AC power fails, it will
automatically convert battery power to AC power for operation of the
appliance. It will automatically recharge the battery when AC power returns.
During all of these times and power transitions, the Sentry requires no manual
adjustments.
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
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Charger Functions
The smart charging system in Sentry is microprocessor controlled to yield optimum charging rates and long battery life.
When the electrical source is restored allowing the resumption of the charging process, there is a 2 second delay during which the charge state of the battery is assessed. After this delay, the bottom most of the LED indicators comprising the battery monitor will illuminate. These LEDs inform the user regarding the state of the battery:
LED Bottom LED “Flashing” –
State of Battery The battery is in the process of recharging.
Bottom LED “On” –
The battery is fully charged.
Replace Battery LED –
When batteries age to the point where they can maintain their fully charged state only for short periods of time, it is an indication that their capacity has decreased. They no longer have the ability to sustain their loads as they did when they were new. The Sentry detects this degradation causing the Replace Battery LED to illuminate. When the battery reaches below 50% of its new battery state, this condition is detected by the monitor. Other LED’s may be lit at the same time.
Figure #1 on page 15 shows the Battery Monitor LED array.
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Uninterruptible Power Indicator The “Power Output” indicator shown in Figure
1, when lit, informs the user that AC power is present at the output
receptacle providing power to the load. This LED function is applicable to
both the standby (AC line power present) and Back Up (Battery Power) states to
inform the user that the Sentry is outputting power. This LED will be
extinguished in the following situations: The main fuse is blown (in the
Standby or Back Up states).
See Section on Fuses (Page 16) The battery is exhausted (in the Standby state)
Figure #1 on page 14 shows the location of this Uninterruptible Power
Indicator.
Fan Operation The air-intake fan, located adjacent to the red DC cable
terminal, is thermostat or load controlled. It operates only when the internal
surface of the Sentry exceeds 140F or when load is being drawn. This
eliminates unnecessary fan operation thereby minimizing battery loading.
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Figure #1
POWER OUTPUT Active When Lit
Replace Battery Charged = ON Charging = Flashing
BATTERY MONITOR
When Utility AC is Down ALL Battery Indicators Are OFF
Figure #2
Charger Fuse F1 F2
Main Fuse
TOP VIEW
Inverter ON/OFF
SIDE VIEW
In the 1733 sentry F2 can be found on the rear perforated plate below the
“overload” LED.
15
How to Discern When Sentry is Operational in the Backup Mode
When all LED’s of the battery monitor are OFF, and the Sentry is plugged into
an AC outlet, the unit is in the back up mode. In this mode when there is
sufficient energy in the battery to operate the system, the uninterruptible
power LED is illuminated. Once the battery is depleted the uninterruptible
power light will extinguish, indicating an absence of AC power at the Sentry’s
output.
How to Discern When Sentry is Operational in the Standby (Line Power) Mode
When at least one of the Battery Monitor LED’s in ON and the Sentry is plugged
into an AC outlet, the unit is in standby mode. In this mode, the
uninterruptible power LED remains illuminated.
Fuses
Figure #2 on page 15 shows the location of two protective fuses F1 and F2 in
the 933 sentry. In the 1733 sentry F2 is found on the rear perforated plate
below the “overload” LED. F1, the charger fuse, provides protection against
charger or battery catastrophic failure. When this fuse is blown the Sentry
will operate on standby power only until the battery is depleted. F2, the main
fuse, provides secondary protection against severe overload. When this fuse is
blown, 120 VAC to the output receptacle of the Sentry is cut off. In this
state, the Uninterruptible Power LED will be OFF. Replace fuses only with the
types indicated on the fuse rating label of your unit which can be found next
to the fuse holders on the flat side of the unit to the left of the line cord.
Audible Alarm
While operating on Battery Backup Power, when the battery is depleted to the
point where it dips below 10.8V, a high pitched audible alarm is emanated from
the Sentry. This is a sign, to the user, that he will imminently loose battery
power. If the maintenance of battery power is crucial, the user may substitute
the spent battery for a fully charged one, by carefully following the
directions in the section “Changing the Battery” on page 11.
16
If the audible alarm is found to be irritable, it may be turned off by simply
turning off the ON/OFF switch of the Sentry. IT IS IMPORTANT TO TURN THIS
SWITCH BACK “ON” WHEN THE UNIT’S OPERATION IS REINSTATED. This should take
place when utility power comes back on or after the battery has been replaced.
FAILURE TO DO THIS WILL LEAVE THE USER WITHOUT BACK UP PROTECTION.
Se nt ry Model 933, Model 1733
Manufactured by SEC America Corp. S. Burlington, VT, 05403
Manufacturer’s Limited Warranty
Sentry is warranted to be free from defects in material and workmanship and to
perform within applicable specifications for a period of two years after
original shipment. Obligation under this guarantee is limited to repairing or
replacing any part thereof, except fuses and pilot lights, which shall within
one year returned to us with transportation charges prepaid, and prove after
our examination to be thus defective.
The above limited warranties take the place of all other warranties, expressed
of implied and correction of such defects by replacement or repair shall
constitute a fulfillment of all obligations under the terms of the warranties.
The warranties do not cover any unit, which has been damaged either in transit
or by misuse, accident or negligence. No warranty or representation by anyone
other than this Company shall be binding on us.
SEC America Corp.
78 Ethan Allen Drive, S. Burlington, VT 05403
17