Laars MFTHW199 - Installer Mode

LAARS Heating Systems
Page 60
5.7InstallerMode
Installer Mode. These changes are to be made only by a qualied technician.
Index
Numbers
Parameter Description
1: EH
Error history up to 10 Check last 10 error codes (E0 - E9)
2: cE
Delete Error history
Select “ON” to delete error code history
Range: ON or OFF,Default OFF
3: In
System initialize Select “ON” to reset to factory setting,Default OFF
4: OH
Maximum Outdoor
Temperature
When used with an outdoor sensor, sets the maximum outdoor design
temperature for the system design. Warm weather shut down will
disable the appliance if the programmed outdoor temperature is ex-
ceeded. Maximum outdoor temperature must be set at least 9°F above
the minimum outdoor temperature. Range: (Minimum Outdoor Tempera-
ture + 9°F) to 110°F , Default 68°F
5:OL
Minimum Outdoor
Temperature
Sets the minimum outdoor design temperature for the system. Minimum
outdoor temperature must be set at least 9°F below the maximum
outdoor temperature.
Range: -4°F to (Maximum Outdoor Temperature - 9°F), Default 5°F
6:cH
Maximum Supply
temperature
Sets the maximum design supply temperature based on the minimum
outdoor design temperature. Maximum supply temperature must be set
at least 9oF above the minimum supply temperature. Range: (Minimum
Supply Temperature + 9°F) - 180°F, Default 180°F
TochangeanyoftheInstallerParameters,
Start by turning OFF the Power to the
Display Control.
Then, with the power OFF, Press and HOLD (more than 5 seconds) the Button B to get into the Installer Mode.
Rotate Dial E until you nd the Installer Parameter (full list on facing page) that you wish to change. Tap Dial E
to enter that Parameter.
Adjust to the setting that you require and then press (tap) Dial E to save and to Exit.
Finish by pressing button B
B C
E
A D