Securitron AQU244 User Manual
Page 4
AQU244 & AQU128 Series Installation Instructions
AQU244 & AQU128 Series Instructions Doc.#500-33020 Rev. A
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Battery Selection
The table below shows typical standby time in hours for various loads and batteries. The table works for either
AQU244 24v, or AQU128 12v.
Approximate Battery Standby Time Table with a reserve of 3 Amps for 5 minutes for Alarm
Total Output
Amps
4Ah Battery
Standby
7Ah Battery
Standby
12Ah Battery
Standby
24Ah
Standby
40Ah
Standby
.5A
6.5 Hrs
13.2 Hrs
23.5 Hrs
47.5 Hrs
79.5 Hrs
1A
3 Hrs
6.3 Hrs
11.7 Hrs
23.7 Hrs
39.7 Hrs
2A
1.3 Hrs
2.5 Hrs
5.5 Hrs
11.2 Hrs
19.7 Hrs
3A
.7 Hrs
1.5 Hrs
3.6 Hrs
7.2 Hrs
13 Hrs
4A
.5 Hrs
1 Hrs
2.3 Hrs
5 Hrs
9.6 Hrs
5A
NA
.8 Hrs
1.7 Hrs
3.7 Hrs
7.4 Hrs
6A
NA
.6 Hrs
1.3 Hrs
3. Hrs
5.5 Hrs
7A NA NA
1.1
Hrs 2.2
Hrs 4.4
Hrs
8A
NA
NA
.8 Hrs
1.8 Hrs
3.4 Hrs
The recharge table below gives approximate recharge times for different loads and battery sizes. The table is
based on batteries depleted to battery cut-off and recharged back to approximately 90% capacity.
Approximate Battery Recharge Times in Hours
Total Output
Amps
4Ah Battery
12/24
7Ah Battery
12/24
12Ah Bat
12/24
24Ah Bat
12/24
40Ah Bat
12/24
.5A
8/8 10/10 11/11 12/12 14/14
1A
8/8 10/10 11/11 12/12 14/14
2A
8/8 10/10 11/11 12/12 14/14
3A
8/8 10/10 11/12 12/14 14/16
4A 8/10 10/12 11/14 12/16 14/20
5A 8/NA
10/NA
11/NA 12/NA 14/NA
6A 8/NA
11/NA
12/NA 14/NA 15/NA
7A 8/NA
12/NA
13/NA 15/NA 17/NA
8A 12/NA 14/NA 16/NA 18/NA 20/NA
Maintenance
The power supply and stand by battery(s) should be tested at least once a year as follows:
1. Check LED’s for normal state. AC ON Green, Trouble ON Green, DC ON Red.
2. Check output voltage with normal load. The AQU128 should read between 13.60 and 13.85vdc. The
AQU244 should read between 27.00 and 27.8vdc. This assures proper voltage to float charge batteries.
3. Disconnect AC input. AC LED should be off, all other LED’s should remain normal.
4. Check DC Output to be above 12.1vdc for AQU128 and 24.2vdc for AQU244. This checks standby
batteries to be operational. Sealed lead acid batteries have a typical life of 3 to 5 years.
5. Re Apply AC and verify AC LED ON.
Lead acid batteries have a typical life of 3 to 5 years.