Operation
10
CHARGER OPERATION
The backup pump will activate automatically when the
backup sump water level rises far enough to trip the float
switch.
If the power to the charger circuit is interrupted, the
length of time that the backup pump will run depends on
the Ampere-hour capacity of the battery used, the battery
charge level, and the required vertical pumping distance.
Extended periods of operation (for example, during an
extended power outage) may exhaust the battery. The
battery charger will begin charging the battery as long as
the battery has a voltage differential of 3Volts or more.
Recharge Time:
DB10018T: Approximately 100+ hours to fully recharge
a battery in a “dead battery condition”.
DB20018T: Approximately 15 hours to fully recharge a
battery in a “dead battery condition”.
Industrial standards define a “dead battery condition” as
9 Volts or less.
The 4 Stages of the Charging Process for
Model Number DB10018T:
NOTICE:
The LED’s will only illuminate once the AC
power has been applied. They will not light up if the
charger is not plugged in.
1. Yellow LED light flashing on and off indicates:
Prequalification test stage is in progress. Normal dura-
tion of this stage ranges from 18 minutes to 27 hours.
If a battery has been left in a state of discharge for
long periods this stage may require 27 hours to deter-
mine if the battery will even accept a charge.
2. Yellow LED light continuously on indicates:
Constant current charge stage. Charger is charging
battery at the full rated output. This stage ends when
the battery terminal voltage reaches the factory preset
voltage level. It takes a minimum of 2 to 150 hours to
complete this stage.
3. Yellow LED light continuously on also indicates:
Constant voltage charge stage. Battery cells are being
equalized. This stage requires two hours to
complete.
4. Green LED light on indicates:
Float charge stage. Battery is charged and ready for
use. Charging has stopped. To maintain a full charge
on the battery, the yellow and green LED may alter-
nately turn back on. This means the charger is briefly
turning back on to keep the battery voltage from
falling below a preset voltage level.
The 5 Stages of the Charging Process for
Model Number DB20018T:
NOTICE:
The LED’s will only illuminate once the AC
power has been applied. They will not light up if the
charger is not plugged in.
1. Yellow “charging”(bicolor) LED flashing slowly
indicates:
A. Prequalification test stage is in progress. The nor-
mal duration of this stage is 20 seconds to 3 min-
utes. However, if a battery has been left in a state
of discharge for long periods this stage may require
2 hours to determine if the battery will even accept
a charge.
Yellow “charging” (bicolor) LED flashing slowly
and the “low battery alarm” Red LED also flashing
at the same rate as the yellow LED indicates:
B. A third prequalification test will be applied to the
battery if:
• it is a 6 Volt battery
• the battery has two or more bad cells
• the battery is in a heavily discharged state.
2. Yellow (bicolor)“charging” LED continuously on
indicates:
Constant current charge stage. Charger is charging
battery at full rated output.
3. Yellow (bicolor)“charging” LED flashing quickly
indicates:
Constant voltage charge stage. Battery cells are being
equalized.
VERTICAL PUMPING DISTANCE
8 FEET
10 FEET
12 FEET
Model Numbers
DB10018T
DB20018T
DB10018T
DB20018T
DB10018T
DB20018T
Gallons Per Hour
1,440
2,088
1,200
1,770
840
1,380
Hours Available
10
6.8
11
6.0
13
6.0
Total Gallons Pumped
8,500
8,500
7,000
7,000
5,000
5,000
TABLE V – Capacity Ratings with a 27M Marine Battery
* These flow rates were obtained with a constant 12.7 VDC battery source. The average GPH will vary due to a reduction in
output voltage from battery.
