Exide PAR20 manual Protective Module Covers, Initial Charge, Step, Table C, Equalize Charge 77F

10.2 System Polarity Labels

The system polarity labels should be applied next to the positive and negative system terminals.

10.3 Warning Label

Apply pressure sensitive warning label provided on a prominently visible module side or end.

10.4 Battery Nameplate

For future reference and warranty protection, apply pressure sensitive nameplate on a prominently visible module. Fill in date of installation and the specified capac- ity and rate.

SECTION 11: PROTECTIVE MODULE COVERS

11.0 General

Each module is provided with a transparent protective cover to help prevent accidental contact with live electrical con- nections, and to provide easy visual access to the system. When all system assembly has been completed, as well as initial testing, including initial charge and cell float volt- age readings, all covers should be installed. Covers should remain in place at all times during normal opera- tion of the battery system.

11.1 Module Clear Cover Installation

Refer to Figure 21 for Module Clear Cover installation. Install standoff legs and standoff keys first, as shown. The cover is then installed by grasping it so that the GNB logo is upright. Locate slots at bottom of cover to the bot- tom standoff legs and slide in place. Locate holes at top of cover and install to top standoff legs. Refer to Figure 21.

SECTION 12: INITIAL CHARGE

12.0 General

Batteries lose some charge during shipment as well as during the period prior to installation. A battery should be installed and given its initial charge as soon after receipt as possible. Battery positive (+) terminal should be connected to charger positive (+) terminal and battery negative (-) terminal to charger negative (-) terminal.

Failure to perform the initial charge within the time limits stated in section 4.2 will affect the performance and life of the battery and may void the warranty.

12.1 Constant Voltage Method Constant voltage is the only charging method allowed. Most modern chargers are of the constant voltage type.

17

Determine the maximum voltage that may be applied to the system equipment. This voltage, divided by the num- ber of cells connected in series, will establish the maxi- mum volts per cell (VPC) that is available. Table C lists recommended voltages and charge times for the initial charge. Select the highest voltage the system allows to perform the initial charge in the shortest time period.

Temperature Correction of Charger Voltage

V corrected = V25°C - ((T actual -25°C) x (.0055 V/°C))

or

V corrected = V77°F - ((T actual - 77°F) x .003V/°F)) Please refer to Appendix A for standard values.

STEP 1

1. Set constant voltage charger to maximum setting with- out exceeding 2.35 VPC.

Example: For a target charge of 2.35 VPC on a 24-cell system, you would set the charger voltage to 56.4 volts. Depending on the batteryʼs state of charge, the charger may go into current limit at the beginning and decline slowly once the target charge voltage is reached.

2. Record time and current at regular intervals – every hour as a minimum.

3. Continue charging the battery until there is no further drop in charge current over 3 consecutive hours. This could take days if the battery has been in storage for a long time. 4. When the current has stabilized, proceed to step 2.

		STEP 2
	1. Continue the charge for the time listed in Table C
depending on the charger voltage setting. The time is IN
ADDITION to the time spent charging in Step 1.
Example: charge for 12 hours if the charger voltage is set
to 2.35 VPC.		TABLE C
	EQUALIZE CHARGE (77°F)
	CELL VOLTS	TIME (HOURS)
2.30		24
2.33		18
2.35		12

2. Record cell voltages hourly during the last 3 hours of the charge time. If, after the charge time has completed, but the lowest cell voltage has continued to rise, you may extend the charge, monitoring cell voltages hourly, until the lowest cell voltage ceases to rise.

3. Proceed to Step 3.