TM 9-2320-260-10
(1) Turn on main circuit breaker switches (switches 22, 23, and 24) in circuit breaker
switch box (1).
(2) Turn on left heater switch (switch 5) and/or right heater switch (switch 8) in
circuit breaker switch box (1).
(3) Set heater thermostat (2) to desired
temperature.
(4) Open heater fuel shutoff valve.
(5) Set heater switch (8) to HEATER
(for heated air) or FAN (for unheated air) as
desired. White indicator light (9) comes on
when heater is working properly.
(6) Set louver operating handles (10) to
control mix of outside air with recirculated
air.
(a) On left side heater, pull louver
handle (10) in to recirculate air, out to admit
outside air.
(b) On right side heater, pull louver
handle (10) in to recirculate air, out to admit
outside air.
(7) Open heat registers (11) below
heaters.
(8) To stop heaters, turn off heater
control switch (8).
CAUTION
Do not turn off heater circuit
breaker switches (switches 5 and
8) until white indicator light (9)
goes off. Damage to heater will
result.
2-181
