C&D Technologies RS-2044 msEndurII Series - Manual (Page 19)

RS02044/1114/CD 19 www.cdtechno.com
Prior to installation, lightly brush with a brass brush or Scotch Brite ™ type pad the battery terminals and
any contact surfaces of the inter-unit connections. Then apply a thin coating of NO-OX-ID type grease to
both the battery terminals and contact surfaces of the inter-unit connectors prior to installation. The ATP
and ATLP msEndur II series of battery terminals are made of a copper alloy with a thin lead coating. The
inter unit connectors (cables and bus bars) are made of copper and have a thin lead or tin coating. Once
coated with protective NO-OX-ID type grease, any “exposed”, “un-tinned” or “un-leaded” coated areas,
no matter if from the factory or due to over brushing, will be protected from oxidation by the grease thus
not require reworking. Optional: preheat the NO-OX-ID type grease and apply warm.
After working with any lead component, wash your hands.
The top row of connectors is to be installed first, then the second down and so on, working from the top
down. When installing connectors, install the top (upper most) bolt first. Complete connector installation
by torqueing all connections to 160 in-lb. [18 N-m], using an insulated torque-wrench.
After torqueing all connections and with the battery still on open circuit (not connected to the charging
source), take post-to-post resistance measurements. Start at one end of the string and work to the
other end, recording micro-ohm resistance of each inter-cell connection between cells. Clean and re-
torque connections (see Appendix B) of similar size connectors which exceed ±10% percent of the average
resistance of battery connections or five micro-ohms, whichever is greater.
When checking connections, disconnect the battery from the load and the charging equipment
and follow all the precautionary measures outlined above and in the general safety references.
Some resistance measurement equipment may cause a spark when the probes are applied to the
cell posts. Use appropriate safety precautions when conducting this measurement.
After connecting all cells of the battery, check the battery voltage using a calibrated digital DC voltmeter
with at least three digits and 0.25% accuracy minimum. Battery voltage should equal
the open circuit voltage of an individual cell multiplied by the number of cells in the battery. Example: (24
cells) x (2.16 VPC) = 51.84 OCV. If the OCV does not equal the expected value, inspect the sequence of
positive (+) to negative (-) connections. Further investigation may require re-inspecting each cell voltage
to confirm an acceptable value.
6.10 Tap Connections
Tap connections may electrically unbalance the battery system and may void the warranty. If a center
tap is used, each side must have its own charging unit.
NOTE:
Over-torqueing can damage the post seal and degrade connection integrity.
IMPORTANT:
Record and retain the resistance readings with the
initial charge information for future reference. See Appendix E.
CAUTION:
It is the sole responsibility of the user to check connections.
Never operate a battery with loose or corroded connections.