Adjusting Heater Output; Auto Mode; Manual Mode - Generac Power Systems MAC400HC Owner's Manual

Figure 3-2. Start Engine
6. Attach air ducting to aircraft, avoiding sharp bends
and twists in duct.
NOTE: A twisted or bent air duct will cause loss of air
pressure and temperature.
7. See Figure 3-3. The screen displays "Engine
Warming — Please Wait".
Figure 3-3. Engine Warming
8. See Figure 3-4. Press ON to start the heat
sequence. Engine warming is complete and the
heater automatically begins warming when coolant
temperature reaches 140 °F (60 °C). The screen
displays "Heater is warming up—Please wait".
Figure 3-4. Heater Warming
Owner's Manual for Flameless Heat Cart
9. See Figure
begins blowing from ducts, the amber strobe light
on top of the unit activates, and the screen displays
"Heater On — Press OFF to stop the heater".
001584

Adjusting Heater Output

Use the up and down arrows to adjust temperature selec-
tion to desired outlet temperature. The options are 100 °F
(38 °C), 120 °F (49 °C), 140 °F (60 °C), and 160 °F (71
°C). Monitor regularly and adjust as needed.

AUTO Mode

In AUTO mode, output temperature is manually set, as
follows:
• To increase output temperature, press (+)
3-6, item A).
• To decrease output temperature, press (-)
3-6, item B).
001585
A
B

MANUAL Mode

In MANUAL mode, heater output can be set to minimum
fan or maximum fan, as follows:
001581 • For minimum fan, press MIN FAN
A). Minimum fan produces the highest temperature
at the lowest air flow.
3-5. When the heater is warm, heat
Figure 3-5. Heater On
Figure 3-6. AUTO Mode
(Figure
Operation
001586
(Figure
(Figure
001578
3-7, item
13