Owner's manual

PG 12

HVACSET-UP

HVAC SET-UP allows you to congure the LS-90 to

control your HVAC system. The LS-90 will control most residential systems.

Take care to correctly set-up the LS-90. Incorrect set-up can result in

damage to your HVAC system.

IMPORTANT: Make sure the LS-90 is powered up and is in the OFF

mode before set-up. (To turn your thermostat OFF, press

the Power button and select OFF.)

Heating and cooling systems must be congured separately.

SET-UP for NORMAL systems (not a heat pump):

1. Press the purple MENU button on the control bar and then touch HVAC SET-UP.

2. Touch to highlight HEAT in the upper left corner of the display.

3. Touch to highlight NORMAL.

4. Select the appropriate number of stages for your heating system (from 1 to 3) by touching the

number of STAGES to highlight, and using the +/- buttons to increase or decrease.

5. Touch the appropriate FAN CONTROL setting. Select HVAC if your heating system controls

the fan (appropriate for most gas, oil, propane and similar furnaces). Select TSTAT if you want the

thermostat to control the fan (for most electric heating systems).

6. Go on to congure COOL or press HOME to return to the Home screen.

SET-UP for NORMAL A/C cooling systems:

1. Press MENU and then touch HVAC SET-UP.

2. Touch and highlight COOL in the upper left corner of the display.

12:30pm WED 77

HEAT PUMP

HEAT or COOL

NORMAL

FAN CTRL TSTAT

AUXILIARY

ELECT or GAS-OILAUX

BACK>

HVAC SET-UP

STAGES

[1]

[NONE]