11/08 505103M
*2P1108* *P505103M*
COMMERCIAL
CONTROLS
505103M
11/08
Supersedes 01/2007
INSTALLATION
INSTRUCTIONS
Commercial
Touch
Screen
Thermostat
E2008 Lennox Industries Inc.
Dallas, Texas, USA
Application
The Lennox Commercial Touchscreen Thermo-
stat provides electronic control of 24 Vac heating
and cooling systems. See Table 1 for a descrip-
tion.
Table 1. Thermostat Description
Feature Description
Powering
Methods
S Battery only
S Direction connection to a 24 Vac
transformer only.
S Direct connection to a 24 Vac
transformer with battery backup.
System
Types
S Conventional (up to 2 heat, 2 cool
stages)
S Heat Pump (up to 3 heat, 2 cool
stages)
Changeover Manual or automatic changeover (se-
lectable)
System Set-
tings
Heat−Off−Cool−Auto
Fan Settings Auto−on
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old con-
trol in the trash. Dispose of properly.
Contact your local waste management authority for
instructions regarding recycling and the proper dis-
posal of an old control.
Installation
When Installing this Product...
1. Read these instructions carefully. Failure to
follow them could damage the product or
cause a hazardous condition.
2. Check ratings given in instructions and on the
product to ensure the product is suitable for
your application.
3. Installer must be a trained, experienced ser-
vice technician.
4. After installation is complete, check out prod-
uct operation as provided in these instruc-
tions.
CAUTION
Electrical Shock or Equipment Damage haz-
ard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Select Thermostat Location
Select a location for the thermostat about 5 feet
(1.5m) above the floor in an area with good air cir-
culation at average temperature (see figure 1).
YES
NO
NO
NO
5 FEET
(1.5 METERS)
Figure 1. Select Thermostat Location
Do not install the thermostat where it can be af-
fected by:
D Drafts or dead spots behind doors and in
corners.
D Hot or cold air from ducts.
D Radiant heat from sun or appliances.
D Concealed pipes and chimneys.
D Unheated (uncooled) areas such as an
outside wall behind the thermostat.
To Next Page
Need help?
General
