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Here's How Pump Sentry Works
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Pump
Sentry
interfaces
between
a pump
and the
AC
electrical
supply.
When
electricity
is
available,
Pump
Sentry
charges
a
battery
and
monitors
the
power
line to
detect a
power
outage.
At the
instant
that
power
failure
occurs,
Pump
Sentry
draws
the
energy
stored
in the
battery
and
converts
it to AC
power.
This AC
power is
automatically
channeled
to the
pump to
maintain
its
operation
in the
absence
of
electricity.
When AC
utility
power is
restored,
the Pump
Sentry
reinstates
AC
utility
power as
the
prime
energy
source
to
operate
the
pump.
Simultaneously
and
automatically
Pump
Sentry
commences
the
recharging
of the
battery,
to
return
it to
full
capacity
in
preparation
for the
next
power
failure.
Figure 1
shows
how
easily
Pump
Sentry
can be
installed.
In the
absence
of
electricity,
Pump
Sentry
will
convert
power
from a
deep
cycle
marine
battery
of 180
minutes
reserve
capacity,
to
operate
a 1/3
horsepower
sump
pump.
Under
typical
duty
cycle
conditions
such
operation
can be
maintained
for
approximately
two
days. If
more
time is
desired,
a larger
battery
or
multiple
batteries
can be
used
(see
Figure
2). The
operating
time is
directly
proportional
to the
battery
capacity.
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Two Pump Sentry Models from which to Choose
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Electrical Specifications
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Model 812 PS
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Model 1612 PS
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Normal Mode Operation:
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Input Voltage:
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100-128 VAC
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100-128 VAC
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Input/Output Current (max.)
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11 A Continuous
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16 A Continuous
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On Motor Start Up
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15 A Peak
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22 A Peak
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Max. Battery Charging Current
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12 A
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12 A
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Max. Recharge Time
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13 Hrs.
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13 Hrs.
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(For recharging a 180 minute reserve battery that has been depleted to 10.5 Vdc)
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Maximum Back Up Power
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1200 Watts Cont.
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1600 Watts Cont.
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Maximum Input Current
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120 A Cont.
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180 A Cont.
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Size: (inches)
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3H x 8W x 17L
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3H x 8W x 21L
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Model 812 PS will operate most pumps whose continuous current draw does not exceed 11 A.
Model 1612 PS will operate most pump combinations whose continuous current draw does not exceed 16 A. |
Pump Sentry Selector Guide**
| Manufacturer |
Pump Model
|
812 PS
|
1612 PS
|
| Submersible Types |
|
|
|
| Hydromatic |
SD 25A
|
X
|
X
|
| Jacuzzi |
3SPP
|
X
|
X
|
| Stevens |
SS45F
|
X
|
X
|
| Zoeller |
M 53
|
X
|
X
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| Tecumseh |
T157
|
X
|
X
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| Column Types |
| Any Brand |
|
X
|
X
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**Models other than those listed above may operate properly with Pump Sentry
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How to Calculate Operating Time During Power Outage
Operating time will depend on the following:
a) The size of the battery bank i.e. its total Ampere-Hour (A-hr) capacity.
Ampere-Hour capacity is calculated by adding the A-hr ratings of all the batteries in the battery bank where the batteries are connected in parallel.
(For Parallel Connection See Fig. #2)
b) The current draw for the pump in Amps (C).
This can be read off the nameplate on the sump pump
c) The average operating duty cycle of the system
The duty cycle of a system is the ratio of its "on" time to its "on" time plus "off" time e.g. if a pump will work for 10 seconds and is then off for two minutes (120 seconds) its duty cycle is calculated as follows:
Duty cycle = 10/(10+120) = 0.077
Once (a) (b) and (c) are known the operating time of a pump sentry in hours can be calculated by the formula:
T= A - hr/(C x 10 x D)
e.g. for a system with 1 battery rated 90 A-hr.
1) 1 battery rated 90 A-hr., A-hr = 1 x 90
2) A sump pump that draws 9 Amps, C=9
3) Duty cycle which operates 10 seconds "on" followed by 3 minutes (180 seconds) "off", D = 10/(10 +180) = 0.053
T (Hours) = (1 x 90)/(9 x 10 x 0.053) = 19
In 10 seconds the average 1/3 hp. sump pump will evacuate approximately 10 gallons of water.
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Features and Benefits of Pump Sentry
• Operates with existing equipment translates into;
- optimum performance
- does not impose the introduction of an additional pump
• Not restrictive to a single brand or pump style
• Easy Hook Up
(No special tools or wiring necessary, plugs into standard wall outlet)
• Automatic Power Transfer
(You do not have to be present to make it work)
• Automatic Recharge
(You do not need to remember to recharge the battery)
(You do not need an additional battery charger)
• Silent and Clean Operation
(Can be kept in home basement or utility room)
• Enables the combination of column and submersible pumps without special additions
(No check valves or switches)
• Maintenance Free Operation
(Needs no fuel, has no moving parts)
• Comprehensive Instruction Manual and Factory Support
(Unconditional 1 Year Warranty on Pump Sentry only)
(No warranty is implied for misapplication - see instruction manual for correct usage) |
A Comparison with Competitor's Specifications
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812 PS Pump Sentry in System
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12 VDC Auxiliary Systems
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Pumping Capacity
(gal/hr. @ 10 ft.)
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Up to 3000 gal./hr. with 1/3 HP AC Pump
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768 - 1600 gal./hr.
(varies with brand)
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Pumping time Flexibility
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Multiple batteries may be connected in parallel to increase pumping time capacity
(see Figure 2 above)
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Unspecified
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Charger Capacity
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13A
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0.4A to 10 A
(varies with brand)
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Recharge Time
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10 Hours when using a single 90 A-hr Battery
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10 Hours to 170 Hours with recommended battery
(varies with brand)
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