TM 55-4920-404-30&P
OPERATOR INSTRUCTIONS
INITIAL SET UP
Section I.
g. Since S-280 type shelters have no means for
2-1. SET UP UPON INITIAL RECEIPT. Refer
leveling the shelter, adjust turnbuckles on the ECU
to TM 10-5410-224-14 for specific set up procedures
shelf assembly to provide a slight backward tilt al-
for SPAM shelters.
lowing condensation to run out rear drain (es-
a. Shelters should be positioned with power cable
pecially during air conditioning mode).
length, tactical deployment, and interaction be-
h. Drive ground stakes and attach grounding ca-
tween related shops in mind. Position SPAM shelter
bles to shelter and generator ground posts.
with power connector (personnel door end) toward
the generator.
CAUTION
Serious shock hazard exists in any un-
Do not drag SPAM shelters into posi-
grounded shelter or generator and
tion. Skids may separate from rubber
may result in severe personal injury
shock mounts.
or death.
b. Position S-280 shelters in the most level area
i. Connect pigtail leads marked L0, L1, L2, L3 to
available, since these shelters do not have integral
respective generator terminals. Be sure generator is
leveling jacks.
set for 208V/60HZ 3 phase operation. Refer to draw-
ing 4920-EG-077, figure D-19.
c. Position generators and power panels with
power cable length, tactical deployment, and noise
factors in mind.
Operation of the shelters on voltages
NOTE
other than 208V/60HZ 3 phase will re-
Each shelter is supplied with a 100 ft
sult in damage to electrical equip-
power cable. The tool crib contains
ment.
three spare power cables and three
j . Connect power cables to each shelter and to
cable connector assemblies, which al-
the power distribution panel. Route power cables so
lows cables to be connected in series.
they are not driven over by vehicles. Then plug the
Power cables to any one shelter should
power distribution panel cable into the generator
not exceed 300 feet.
pigtail.
d. Using the masons level stowed inside each
CAUTION
SPAM shelter, level the shelter, utilizing leveling
jacks, in all directions before opening the fold-out
Do not allow cable connectors to lie in
panels.
low spots or puddles.
NOTE
k. Start generator in accordance with applicable
procedures/and TM 5-6115-569-15 and adjust for
If shelter center section is not leveled
proper voltage and frequency.
properly, rubber panel seals will be
scuffed off resulting in rainwater
l. Close (turn on) generator main circuit break-
leakage.
er, power distribution panel circuit breakers, and all
shelter circuit breakers.
e. Fold out and set up SPAM shelters in accord-
ance with TM 10-5410-224-14, which is supplied
m. With suitable voltmeter, check all electrical
with each shelter.
outlets for 110 VAC and check all lights for proper
operation.
f. Install ECUs on fold down shelf assemblies
and remove hex head drain plug on left rear lower
n. Place ECU evaporator fan switch in the high
edge of the unit. Plug in ECU power cable con-
nector.
