Use and Care Manual

LEOCH Battery Corporation
5.3 Pre Installation Rack/Enclosure Location Check
Floor bearing: Since batteries are heavy, check the floor loading is not exceeded. Check
rack/enclosure complies with any load spread requirement, and seismic zone
requirements of the installation area.
To assemble a Leoch battery rack/enclosure, see rack installation instructions.
5.4 Battery Installation and connection
 Use insulated tools only;
 Connect battery modules together to the required system voltage, then connect battery string with
charger or load;
 When multi-strings of batteries are to be parallel connected, connect batteries in series first & then
complete the parallel connection. Parallel cables to the charge/load should be as close in size and
length from each of the parallel strings to prevent uneven voltage drops that can imbalance the
parallel battery strings.
 To ensure good ventilation, the batteries per row should keep around 0.4” to .79” (10 - 20mm) inter-
bloc spacing;
 A good rule of thumb on the proper cable sizing between batteries:
a) AWG# 6 for loads up to 90 Amps.
b) AWG# 2 for loads up to 150 Amps.
c)
AWG# 1/0 for loads up to 250 Amps.
d)
AWG# 4/0 for loads up to 400 Amps.
e)
Refer to NEC for voltage drops for long cables.
 Before connection, lightly clean the battery terminals to remove sulfate and dirt.
 Before connecting inter-cell connectors apply a light coating of No-Ox grease to the surface of the
terminal and inter-cell connectors or cable lugs;
 After batteries are installed, test the voltage of the battery string. Make sure there are no battery
modules that have been incorrectly installed in reverse polarity. If all modules installed correctly,
link battery to load.
 Use correct torque on all terminals, ensuring every connecting nut and screw is secure; see torque
settings as table 1 below.
Table 1: Posts & Suggested Torque Table
Terminal Type
TAB
0.187"
(4.75 mm)
TAB
0.250"
(6.35 mm)
M5 Bolt M6 Bolt M8 Bolt
FASTON TAB Terminal Models
T1
T2
Inserted Post Models
T12
T6, T7, T8, T13
T11
Flag Bolt-on Post Models
T3, T5, T10
T9, T14
Torque (Newton Meters) Push On Push On 2.5 Nm (+5%) 5.14 Nm (+5%) 13 Nm (+5%)
Torque (Inch Pounds) Push On Push On 22 in. lbs. (+5%) 45.5 in. lbs. (+5%) 115 in. lbs. (+5%)
Torque (Foot Pounds) Push On Push On 1.8 ft. lbs. (+5%) 3.79 ft. lbs. (+5%) 9.58 ft. lbs. (+5%)