TM 9-2320-280-10
h.
M997, M997A1, and M997A2 Heater Operation.
(1)
To operate the heater, ensure fuel cutoff valve (14) is open and place A/C vent-heat lever (6) in
"HEAT" position.
(2)
Adjust the inside-outside air lever (7) to "HEAT MAX" or "HEAT NORMAL."
(3)
Position fuel selection switch (9) to "LOW."
(4)
Hold heater run-start switch (10) to "START” position until heater light (11) illuminates to show that
heater burner is operating. When heater light (11) illuminates, position the heater run-start switch (10) to
"RUN."
(5)
Outlet air temperature can be adjusted by positioning the fuel selection switch (9) to either "HI" or
"LOW," the fan switch (13) to "LO," "MED," or "HI," and the inside-outside air lever (7) to either "HEAT MAX"
or “HEAT NORMAL."
(6)
To turn the heater off, position the heater run-start switch (10) to "OFF." It will take several minutes
for the heater to purge itself of fuel. After heater light (11) goes off, move inside-outside air lever (7) to “UNIT-
OFF."
i.
M997, M997A1, and M997A2 Air-Conditioner Operation.
(1)
Start engine (para. 2-10).
(2)
To operate the air-conditioner, position the A/C vent-heat lever (6) to "A/C."
(3)
Adjust the inside-outside air lever (7) to "A/C MAX" or "A/C NORMAL."
(4)
Set A/C off-on switch (12) to “ON."
(5)
Adjust A/C cold control (8) clockwise to "COLD."
(6)
Outlet air temperature can be adjusted with A/C cold control (8) by rotating the control (8) between
"OFF" and "COLD," the fan switch (13) to "LO”, "MED," or "HI," and the inside-outside air lever (7) to "A/C
MAX" or "A/C NORMAL."
(7)
To turn air-conditioner off, position the A/C switch (12) to "OFF" and move inside-outside air lever (7)
to UNIT-OFF".
j.
M997, M997A1, and M997A2 Vent Operation.
(1)
To operate ventilation system without heating or cooling incoming air, place A/C vent-heat lever (6)
and inside-outside air lever (7) in “VENT" position.
(2)
Activate fan switch (13) to "LO," "MED," or "HI."
(3)
To turn ventilation system off, place inside-outside air lever (7) in
"UNIT-OFF" position.
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