5622 Engineer Drive / Huntington Beach, CA 92649 / Office (800) 228-2966 / Fax (714) 898-6802
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Manual Operation
Adjusting Set Points
The Heat or Cool set points can be displayed by
pressing the Heat/Cool button; the set point will be
indicated on the upper right of the display.
Heat - If “Heat Setting” is displayed on the top right of
the display, simply press the UP or DN button to change
the heat set point. If “Cool Setting” is displayed and you
want to change the Heat set point, press the Heat/Cool
button twice to change from “Cool Setting” to “Heat
Setting”. Then press the UP or DN button to change the
set point.
Cool - If “Cool Setting” is displayed on the top right of
the display, simply press the UP or DN button to change
the cool set point. If “Heat Setting” is displayed and you
want to change the Cool set point, press the Heat/Cool
button twice to change from “Heat Setting” to “Cool
Setting”. Then press the UP or DN button to change the
set point.
Changing Mode
The thermostats are auto changeover, but specific
modes may be selected. Auto mode is the default.
Heat only – Press and hold the Menu button and note
the mode display begin to change. Press the Select
button when Heat is displayed.
Emergency Heat - Press and hold the Menu button
and note the mode display begin to change. Press the
Select button when Emg is displayed.
Cool only - Press and hold the Menu button and note
the mode display begin to change. Press the Select
button when Cool is displayed.
System Off - Press and hold the Menu button and note
the mode display begin to change. Press the Select
button when Off is displayed.
Auto mode – Press and release the Menu button.
Override
When the thermostat displays “Unoccupied” (top of
display), a 2-hour temporary override may be initiated by
pressing the Override/Select button. When additional
override time is required, press the Override/Select
button again.
Reheat
The ModStat can be field configured for reheat
operation, including Fan Powered Boxes. To set the
ModStat for Reheat, press and hold the Heat/Cool and
Select buttons together and then press the Menu button;
release all three buttons and the ° symbol will appear
next to the heat and cool setpoint temperature display.
NOTE: An air proving switch must be wired into the
AUX output to protect the electric heating devices.
24V Terminal Block
RO – Run Open, damper (not used for MODS2)
RC – Run Closed, damper
AUX – Reheat/Aux Heat Fan
R – 24vac power input
C-MC – 24vac common / damper common
(18 ga. Minimum wire size)
Communication Terminal Block
TX – Data Transmit
RX – Data Receive
TX – Data Transmit
RX – Data Receive
(Twisted pair or shielded twisted pair)
Rev 4/14/10
