Note: The preheater system will warm up the coolant to approximately 50 °C (122 °F) before the blower fan for the cab heater activates. This helps to prevent premature drainage of the battery.
The operator presets the time for the activation of the preheat system. The system will operate automatically at the selected start time until the start time is changed by the operator.
The default operating duration is set at 30 minutes. The operating duration can be regulated by the operator. Due to drainage of the battery, the maximum operating duration is between 1 hour and 1 1/2 hours.
Note: The system will operate if the secondary disconnect switch is in the ON position or in the OFF position. If the battery disconnect switch is turned off, the preheat system will not operate and the settings for the preheat system will be erased. The settings must be programmed again.
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| Illustration 1 | g00891571 |
The control panel for the preheat system is located on the right side of the cab. Use the control panel to program the preheat system.
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| Illustration 2 | g00887861 |
(1) Display. (2) Days. (3) Day of the week. (4) Time. (5) Heater ON indicator. (6) Select key (time and day). (7) Select key (system settings). (8) On/Off key. (9) Arrow key (decrease). (10) Arrow key (increase). | |
Operating the Preheat System
Note: Before you activate the system, turn the temperature variable control to MAXIMUM and turn the fan control to LOW.
Setting the Time of Day and the Day of the Week
The time of day and the day of the week are displayed continuously when the engine start switch is in the ON position. Press select key (2) in order to display the time of day when the engine start switch is in the OFF position. The values will be displayed for ten seconds.
To set the time of day, hold down select key (2). Then, press arrow keys (5) and (6) until the correct time of day is shown on display (1) .
To set the day of the week, hold down select key (2). Then, press select key (3) until the correct day of the week is shown at the top of display (1) .
Manually Starting the Preheat System with the Engine Start Switch in the OFF Position
Press on/off key (4) in order to start the preheat system at any time. The remaining preheat time and the symbol are shown on display (1). The preheat time can be changed by pressing arrow keys (5) or (6) .
Press on/off key (4) again in order to shut off the preheat system. The preheat system will enter an automatic cool down mode for five minutes after the system is shut off.
Manually Starting the Preheat System with the Engine Start Switch in the ON Position
Press on/off key (4) in order to start the preheat system. The preheat system will remain on until the engine start switch is turned to the OFF position.
After the engine start switch is turned to the OFF position, the preheat system will remain active for five minutes. This time period can be increased by pressing arrow key (5). The maximum time period is four hours.
Press on/off key (4) again in order to shut off the preheat system. The preheat system will enter an automatic cool down mode for five minutes after the system is shut off.
Programming the Preselected Start Times and Days
Three different start times within a 24 hour period can be programmed into the preheat system. The preheat system can also be programmed to start once in seven days. The operator must select the setting for the desired start time in order to change the start time. Press select key (3) until the desired setting is displayed.
To include the day of the week in the selection, select the desired setting and hold down select key (3). Press arrow key (5) until the desired day of the week is selected. Then, proceed with the selection of the start time.
- The default for the first setting in the memory is "1:11".
- The default for the second setting in the memory is "2:22".
- The default for the third setting in the memory is "3:33".
- When the key is pushed for the fourth time, the display returns to the original starting point. The display will go out in ten seconds.
To program a preselected start time, press select key (3) until the desired setting is selected. Within ten seconds, begin setting the desired start time by using keys (5) and (6). When the correct start time is shown, do not press any keys on the display. The display will turn off in ten seconds and the selected start time will be automatically entered.
If the desired start time has been previously programmed into the system, press select key (3) until the desired setting is displayed. Release all of the keys. The display will turn off in ten seconds and the start time will be automatically entered.
Note: If the display is at the original starting point, the next start time that is stored in the memory is automatically selected.