Generac Power Systems MAC400HC, Owner'S Manual

Page: 18 / 40

14 Owner’s Manual for Flameless Heat Cart
Operation
• For maximum fan, press MAX FAN ( Figure 3-7 ,
item B). Maximum fan produces a lower tempera-
ture at a higher air flow.
Figure 3-7. MANUAL Mode
Heater and Engine Shutdown
1. Press OFF. Heater stops; blower continues running
and a countdown displays. The screen displays
“Heater is cooling down — Please wait” (
Figure 3-
8 ).
Figure 3-8. Heater Cooling
NOTE: During cool down, the ON button (A) is disabled.
The blower stops when the countdown expires. The dis-
play indicates when it is okay to shut off the engine (
Fig-
ure 3-9 ).
Figure 3-9. Cooling Complete
2. Turn ignition key to OFF.
3. Disconnect air duct from airplane.
IMPORTANT NOTE: Do not detach air duct until all air
pressure is emptied from the duct.
4. Retract air duct and place in storage area.
5. Turn main battery disconnect to OFF.
Positive Air Shutdown (PAS)
See Figure 3-10 . This unit is equipped with a manually
activated positive air shutdown (PAS) on the air intake. If
the atmosphere contains combustible propane or natural
gas, a positive air shutdown can be activated to prevent
these gases from being drawn into the engine and ignit-
ing.
The PAS system stops the engine by closing an internal
valve and obstructing intake air. See
Figure 3-11 . The
PAS is activated by pulling the red T-handle outwards.
The reset knob rotates clockwise to block airflow.
001579
A
B
C
CAUTION
(000246)
Equipment Damage. The emergency stop switch is
not to be used to power down the unit under normal
operating circumstances. Doing so will result in
equipment damage.
001582
A
001583
CAUTION
(000240a)
Unit damage. Do not stop engine before heating
unit is cooled. Doing so could result in unit damage.
CAUTION
(000246)
Equipment Damage. The emergency stop switch is
not to be used to power down the unit under normal
operating circumstances. Doing so will result in
equipment damage.