On rear control panel (1, figure 2-26), verify that POWER MODE switch (2) is set to EXT.
Ensure the following circuit breaker is set to ON:
HYDRAULIC PUMP/MOTOR (3)
Verify that EXTERNAL HYDRAULIC PUMP switch (4) is set to ON. HYD PUMP ON indicator
will light (blue).
Set ESS MODE selector switch (5) to VENT only.
Cooling system, heating system and recirculation fan are disabled in external NBC mode.
Press NBC FAN switch (6) on rear control panel (1) to turn on NBC fan (NBC FAN ON indicator
lights green). NBC alarm buzzer (7) will sound and PRES LOW indicator on NBC FAN switch
(6) will light (red). Pressing NBC ALARM (press to mute) switch (8) will silence NBC alarm
buzzer (7) and ALARM MUTE indicator on NBC ALARM (press to mute) switch (8) will light
Verify converter AC INPUT circuit breaker (9) is set to ON.
Verify converter power switch (10) is set to ON.
Verify RIB FAN switch (11) is set to ON (indicator will light white). RIB INFLATION
PRESSURE indicator (12) should show NORMAL (white).
During external power mode of operation, 10 kW TQG will only support heat stage 1.
Turning heaters 2 through 4 ON will shut down 10 kW TQG.
(10) When ABS has reached over pressure of 0.5 iwg on NBC SHELTER PRESSURE gage (13), press
NBC ALARM (press to mute) switch (8) to turn off alarm mute. ALARM MUTE indicator (blue
light) on NBC ALARM (press to mute) switch (8) will go off.
(11) Ensure that fastener hook and fastener loop are engaged properly on inner ambulatory airlock
door and zipper is closed on inner TALP airlock tunnel.
To prevent death or injury to personnel from contamination, ensure NBC SHELTER
PRESSURE gage reads at least 0.5 iwg.
Under NBC conditions, inflated ABS should always be pressurized to at least 0.5 iwg.
Adjustment of over pressure inside ABS, TALP airlock and ambulatory airlock is
accomplished by opening flaps on inner and outer TALP and ambulatory airlock door vents.
TALP and ambulatory airlocks should be pressurized to 0.3 iwg.
(12) Open vent holes on inner TALP and ambulatory airlock doors by adjusting or pulling back
fastener hook and fastener loop covers. Inner ambulatory airlock door and TALP airlock door
vents should be opened or closed to achieve a CBPS over pressure of 0.5 iwg on NBC SHELTER
(13) Outer TALP and ambulatory airlock door vents should be adjusted to achieve a pressure of 0.3
iwg within TALP and ambulatory airlock. Communicate with cab crew to have them adjust
outer TALP and ambulatory airlock door vents as necessary.