V. Optional Gas Collection System Installation
(tubing kit PN 15028596)
TEL Series Models with ‘G’ in the product suffix (i.e. TEL12-105FNSG) include a gas collection system
feature which allows the hydrogen and oxygen gases that may vent from the battery to be directed to a
specific cabinet exit location by the installation of 6mm or ¼” ID PVC tubing. This tubing daisy chains
from one battery to the next in the string with the first battery in the string requiring a ‘plug’ in the hose
barb port above the positive terminal
of the battery (shown in Figure 6).
(Note that each battery ships with a
plug in this right side port. Installer
should remove any remaining plugs
to allow for tubing connection)
Individual tubes are cut by the
installer (each short tubing piece is
approx 6” in length) and are routed
from battery to battery as shown in
Figure 6 (please make sure that the
tubing is not kinked so gases can flow
freely in the tubing). A final system
collection tube, which varies in
length, is connected to the hose barb
port above the negative terminal on
the left most battery unit. This tube should be routed per the cabinet manufacturer’s instructions.
Special Note: if the gas collection system is not required and/or utilized, the factory installed
plug in the right port of each 12 volt battery can be removed or can remain in place. NEVER
install a plug in both battery ports or the left side port since this will not allow the battery to vent
any excess pressure and could cause an unsafe condition.
VI. Freshening Charge
When the batteries have been in storage or transit for an extended period, over 6 months or if OCV’s are
below 12.48 volts or when the number of cells in series is greater than 24, it is recommended the battery
system be given a freshening charge at 2.4 volts average per cell for 24 hours prior to final installation.
This will ensure higher initial performance and will reduce the time period required for the cells to achieve
proper voltage balance between the individual units. Normally freshening charges are only necessary if batteries
were in a warehouse at 77°F in excess of 6 months or the open circuit voltage of the unit has declined to less than
12.48 VDC.
Additionally, if the batteries are being deployed into a system having a string voltage greater than 48Vdc,
C&D strongly recommends the entire string be given a 2.4 volts average per cell charge prior to
installation. This will ensure the closest possible voltage balance between the individual units in the
string.
VII. Float Charging
Following the freshening charge (if necessary) the battery system should be placed on “float“ charge at
between 2.25 volts per cell and 2.30 volts per cell average (approximately 13.5 to 13.8 volts/unit average
for 12 volt units at 77°F). When temperatures other than 77°F (25°C) temperature compensated charging
may be needed.
Refer to technical bulletin 41-2128 “Charging Valve Regulated Lead Acid Batteries” for additional
information www/cdtechno.com/resource/support_doc.html
Plug
Short tubes
Tube to
cabinet
exit port
Figure 6 – Optional Gas Collection
System Installation (if required by
cabinet manufacturer)
RS02046/0514/CD
7
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