Here's How Pump Sentry Works |
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.
Two Pump Sentry Models from which to Choose |
Electrical Specifications |
Model 812 PS |
Model 1612 PS |
Normal Mode Operation: |
|
|
Input Voltage: |
100-128 VAC |
100-128 VAC |
Input/Output Current (max.) |
11 A Continuous |
16 A Continuous |
On Motor Start Up |
15 A Peak |
22 A Peak |
Max. Battery Charging Current |
12 A
|
12 A |
Max. Recharge Time |
13 Hrs. |
13 Hrs. |
(For
recharging a 180 minute reserve battery that has been depleted to 10.5 Vdc)
Maximum Back Up Power |
1200 Watts Cont. |
1600 Watts Cont. |
Maximum Input Current |
120 A Cont. |
180 A Cont. |
Size: (inches) |
3H x 8W x 17L |
3H x 8W x 21L |
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 |
| Tecumseh |
T157 |
X |
X |
| Column Types |
| Any Brand |
|
X |
X |
**Models other than those listed above may operate properly with Pump Sentry |
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
|
812 PS Pump Sentry in System |
12 VDC Auxiliary Systems |
Pumping Capacity
(gal/hr. @ 10 ft.) |
Up to 3000 gal./hr. with 1/3 HP AC Pump |
768 - 1600 gal./hr.
(varies with brand)
|
Pumping time Flexibility |
Multiple batteries may be connected in parallel to increase pumping time capacity
(see Figure 2 above)
|
Unspecified |
Charger Capacity |
13A |
0.4A to 10 A
(varies with brand) |
Recharge Time |
10 Hours when using a single 90 A-hr Battery |
10 Hours to 170 Hours with recommended battery
(varies with brand) |
|
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