Generac Power Systems MAC1.2G, Owner'S Manual

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14 Owner’s Manual for Indirect Fired Heater
Operation
• Avoid sharp bends or 90° turns in the ducting.
• Use only the necessary length of ducting required;
do not exceed maximum length.
• Verify that ducting is not in a high traffic area, and
will not impede workers or other machinery. Care
should be taken to prohibit the need to step or
climb over ducting.
• DO NOT place ducting over combustible materials.
• DO NOT place ducting over surfaces that may
cause damage or reduce performance, such as
water, sharp rocks or glass, electrical wiring, pip-
ing, etc.
• DO NOT place or drape anything over ducting,
such as covers, insulation (insulated ducting is
available), blankets or cloth, or electrical wires.
• Inspect ducting for damage or unusual wear before
each use.
Engine and Heater Startup
1. Turn ignition key to RUN and wait for the light to
expire.
2. Turn ignition key to START.
NOTE: Do not hold the engine starter key in the start
position for more than 15 seconds. Doing so will overheat
the starter motor. Wait 30 seconds for the starter motor to
cool before making a second attempt to start if the engine
fails to start.
3. Warm up engine for 90 seconds.
4. See Figure 3-1 . Turn main disconnect switch to
ON.
Figure 3-1. Main Disconnect Switch
5. Press green START button.
6. Turn burner to ON.
7. See Ducting Guidelines . Place heating ducts as
appropriate for the application.
IMPORTANT NOTE: A twisted or bent air duct will
cause loss of air pressure and temperature.
NOTE: Do not use starting aids, such as gasoline. Doing
so will damage the engine.
Adjusting Heater Output
See Thermostat Control to adjust the setpoint (SP) and
differential (dIF). If SP is set to 180 °F (82 °C) and dIF is
set to 10 degrees, the following will happen:
1. Temperature will rise to 180 °F (82 °C).
2. Burner shuts off until temperature cools down 10
degrees.
3. Burner turns back on.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
(000234a)
WARNING
Crushing hazard. Verify unit is properly secured and
on level ground. An unsecured unit can suddenly roll
or move, causing death or serious injury.
CAUTION
(000291)
Equipment damage. Do not attempt to start or operate
a unit in need of repair or scheduled maintenance.
Doing so could result in serious injury, death, or
equipment failure or damage.
WARNING
CAUTION
(000229)
Equipment or property damage. Do not block air
intake or restrict proper air flow. Doing so could
result in unsafe operation or damage to unit.
CAUTION
(000290)
Equipment damage. Do not cover unit during
operation. All ducting ports must remain open
even if not being used. Failure to do so will
result in equipment damage.
008974
ON
OFF
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