Engine And Heater Shutdown; Thermostat; Changing Temperature Units; Thermostat Control - Generac Power Systems MAC1.2G Owner's Manual

Engine and Heater Shutdown

CAUTION
Equipment damage. Shut down the heater before
turning off the generator. Failure to do so could
result in equipment damage.
1. Turn burner switch to OFF.
2. Allow outlet air temperature to cool for at least 90
seconds.
IMPORTANT NOTE: Do not detach ducting until all air
pressure has been emptied from hose duct.
3. Press STOP.
4. Turn ignition key to OFF.

Thermostat

F
G
Figure 3-2. Thermostat Features
A Temperature offset indicator
B Temperature units indicator
C Operating mode indicator
D Liquid Crystal Display (LCD)
E MENU button
F Output relay status indicator LED
G Down arrow button
H Up arrow button

Changing Temperature Units

The thermostat is factory set to display temperature in
Fahrenheit. Press the up and down buttons simultane-
ously to convert to Celsius.
Owner's Manual for Indirect Fired Heater
(000295)
A
BIN
B
F
C
D
MENU
E
H

Thermostat Control

1. Press and hold the MENU button until the display
changes to flashing SP.
2. Press the up or down buttons to reach desired
function.
3. Press the MENU button to display current value of
function.
4. Press the up or down buttons until desired value is
reached.
5. Press the MENU button to save. The display will
return to the sensor temperature.
NOTE: If the MENU button is not pressed after changing
the setpoint value, the new value will not be saved.
See the table below for all thermostat functions.
Function
SP = Setpoint
diF = Differential
ASd = Anti-short
Cycle Delay
OFS = Temperature
Offset
SF = Sensor
Failure Operation
003820
Operation
Factory
Range
Setting
-30 to 212 °F
30
(-34 to 100 °C)
1 to 30 °F or C
0 to 12 minutes
0 to 50 °F or C
0 = output
de-energized
1 = output
energized
5
1
0
1
15