3-5 Turn-On of External Power
fluorescent lamps will be attained
Ensure that all power circuit breakers
after the TM11-5895-846-14 shelter
in the shelter (all unit drawers and the
power distribution panel) and on the
pallet power unit are in their off or
incandescent lamp will not be lighted.
down position except main pwr 1 and
2 and blackout inhibit circuit
3-7. Checking Blackout Switch Operation
Check the operation of the door and blackout switches
a. On the power unit, assure that the output of
a. Close the shelter doors and place the
both generators is set for 120 volts.
BLACKOUT switch to the ON position; that is, the door
b. On the distribution box check that the
switches are operational, lights are on.
generator output selector switch is in the OFF position.
b. Open and close the shelter door; the lights
c. Start the engine-generators and allow a
should turn off and on, respectively.
minimum of 15 minutes for warm-up.
c. Open and close the small door (within the
shelter door); the lights turn "off" and on, respectively.
d. Place the BLACKOUT switch to the OFF
position, that is, door switches are bypassed and
3-6. Lighting the Shelter
inoperative; lights remain on.
a. Refer to the procedures described in
e. Open, then close, each door in turn; lights
b. On the power distribution panel check for or
Position the BLACKOUT switch for the desired
perform the following:
mode of operation.
(1) Check that both POWER IN indicators are
3-8. Adjusting the Environmental Control System
(2) The MAIN POWER 1 GO/NO GO PHASE
SEQUENCE light is on in the GO position when the
Adjust the environmental control system as described
MAIN POWER 1 circuit is on.
below. Consider this as a two-part procedure being
performed, in part, before and after turn-on (para 3-9
Applying power to the terminal with
below). Some of the initial adjustments may have to be
the PHASE SEQUENCE lights on in
changed after the warm-up period.
the NO GO position will cause
Proceed as follows:
damage to the terminal equipment,
the generator, or both.
a. Adjust the shelter vents as described in
(3) If the NO GO lights appear, place the
applicable generator POWER circuit breaker to the OFF
b. On the power distribution panel, place the
position and check the terminal power cables for the
UTILITY circuit breaker to the ON .position, unless
proper connection to the power selector box on the
already placed to ON.
c. Refer to TM 5-4120-239-14 for operating
(4) In order, place the MAIN-2 and MAIN-1
instructions on the air conditioner.
Place the air
circuit breakers to the ON position, unless already placed
conditioner in the desired mode of operation; cooling,
(5) Place the UTILITY and LIGHTS circuit
d. Perform the appropriate step below depending on the
breakers to the ON position.
c. Place the BLACKOUT INHIBIT switch to the
(1) Temperature above 32F (0C). Open all
ON position, unless already placed on ON. Close the
external intake and exhaust vents (four roadside).
Close all internal recirculating vents.
d. The shelter should now be illuminated and ac
(2) Temperature below 32F (0*C). Close all
external vents and open all internal vents...
e. Depending on the temperature, place the air
As a minimum, the incandescent
conditioner in the cooling or heating mode (or venting, if
lamp should be lighted if the
desired). Adjust the thermostat to turn off the unit at the
temperature is below approximately
freezing (32F, 0C); the fluorescent
3-9. Applying Power and Tuning the Equipment
lamps will be lighted but at a reduced
output. Full light output from the