fast charge circuit.
The K2A contacts (1 & 5) restore the normal
current flow path through relay Kl .
Any milliameter reading must be added to the
charge rate as required for the particular battery.
Check the Trickle Charge Rate Table for the prop-
er setting.
Manual Operation
Replace the fuse and adjust resistor R2 for the
proper charge rate.
When the AUTO/MANUAL switch is placed in
the MANUAL position, the trickle charge circuit is
bypassed and a steady 2 amp, unmonitored, charge
is applied to the battery. Current flows from the
rectifier, through resister Rl, TRICKLE RATE
ADJ. switch (OFF position), AUTO/MANUAL
switch (MANUAL position) to terminal OV (-BAT.)
CHARGE RATE ADJUSTMENT
NOTE: If the system includes battery supervi-
sion (“Q” panel), a “trouble” condition will oc-
cur when the fuse is removed. If the “trouble”
signal is silenced, make sure that it cpperates pro-
perly when the rate adjustment is completed. In
most cases the “trouble” signal will operate
when the fuse is replaced if the switch is in the
SILENCE position .
In some systems it may be
necessary to operate the RESET switch.
NOTE: Resistors Rl, R4 and R5 are adjusted at
the factory for proper operation and their set-
tings should not be changed.
To Adjust The Trickle Charge Rate
When the trickle charge rate is too high (exces-
sive water evaporation) or when the charge rate is
too low (low specific gravity) the rate of charge
should be adjusted so that the system operates
properly.
The AUTO/MANUAL switch must be in the
AUTO. position and the TRICKLE RATE ADJ.
switch must be in the ON position.
The specific gravity of the cells should be check-
ed and recorded monthly or biweekly.
To determine the added load, if any, remove the
Individual cell voltage should be checked and re-
fuse from the negative load of the battery circuit.
corded at least quarterly.
BATTERY
TYPE
TRICKLE CHARGE RATE TABLE
TRICKLE CHARGE
CAPACITY BATTERY TRICKLE CHARGE CAPACITY
RATE
A. H.
TYPE
RATE
A. H.
AMPS 6’ 77’ F
AMPS 6’ 77’ F
* 4294.1 .005 8 A. H. 4294.22 .013 13A. H.
* 4294.2 .010 16A.H. 4294-23 .018 18 A.H.
* 4294.3 .Ol5 24A.H. 4294.24 .030 30 A. H.
* 4294.4 .018 30 A. I-l.
l
4294.25 .OlO 16A.H.
’ 4294-21 .005 8A.H. * 4294.26 .Ol5 24A.H.
* Lead Acid Batteries
Lead acid batteries are at full charge when voltage per cell is 2.15 volts and specific gravity is approximately 1.215.
Nickel Cadmium voltage is 1.4 per cell.
Both lead acid and nickel cadmium batteries should be checked periodically. Adjust trickle
rate accordingly. A lS” temperature rise doubles the charge rate.
50
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