3-3
3-8. CONTINUOUS OUTPUT RATE, 28.5 VDC CONSTANT OUTPUT
20 amp hours (with AC power connected)
NOTE
If current demand exceeds 20 amps, converter output voltage will drop
below 28.5 VDC and two or more LED status indicator bars will illumi-
nate. If all LED status indicator bars illuminate, both the con-
verter and power cells are supplying 24 VDC power output (see para-
graph 3-4 and 4-7.4.).
3-9. ENGINE STARTING POWER
Operators should always ensure the unit is charged above 80% prior to
ground support engine starting. However, circumstances may exist
during use where unit recharge is not readily available and immediate
external engine starting power is required. The following provides
minimum states of charge necessary to provide ample power for an ef-
ficient engine start under specific current load demands.
ENGINE START CURRENT LOAD DEMAND
MINIMUM CHARGE
650-850 peak starting amps
40% charged
850-1000 peak starting amps
50% charged
1000-1500 peak starting amps
60% charged
1500-1800 peak starting amps
70% charged
1800-2500 peak starting amps
80% charged
2500-3000 peak starting amps
90% charged
3-10. TEMPERATURE
Temperatures refer to the unit’s cold/heat soaked temperature. A
unit’s cold/heat soaked temperature shall be established by the ambi-
ent temperature that a unit is exposed to for one (1) hour or more.
If unit’s cold/heat soaked temperature exceeds operating temperature
range, unit shall be stabilized prior to operation as follows: COLD
SOAKED, warmed for a minimum of 3 hours above +10C
o
(+41
o
F) or 2
hours above +20C
o
(+68
o
F); WARMED SOAKED, cooled for 1 hour below
+38C
o
(+100
o
F).
Operating range:
without AC power -40C
o
(-40
o
F) TO +60C
o
(+140
o
F)
with AC Power -30C
o
(-22
o
F) TO +50C
o
(+124
o
F)
