6 of 24
© 2011
D 538 - 12/11
Switch Settings
Switches are set to “On”
position from the factory, and
do not require changing for
most applications.
1
2
3
4
1 2 3 4
tNt 538
538
One Stage Heat
Mmm YYYY
Lo
t # 1
23
45
Mee
ts Class B:
Canadian ICES FCC P
ar
t 1
5
Power: 24 V ±10% 50/60 Hz 1.8 VA
56 VA fully loaded
Relay: 24 V (ac) 2 A
10
01-03
tN4
1
C
2
R
3
W
4
6
5
Sensor
Switch Se
ttings:
For instructions see brochure
Use at least 75°C conductors
Se
tback
Scene
Lock
No
t used
ON
No
t used
Unlock
Off
Off
No P
ower
1
2
3
4
1 2 3 4
Mmm YYY
L
t#
123
4
Mee
ts Class B:
Canadian ICES
y
2 A
Switch Se
ttings:
Se
tback
Scene
Lock
No
t used
ON
No
t used
Unlock
Off
Off
Switch Position Action
1
ON
SETBACK
The thermostat follows a programmable setback schedule
as a schedule member if available. Requires the installation
of a Timer 033 to use this feature.
OFF
OFF
The thermostat does not follow a programmable setback
schedule.
2
ON
SCENE
The thermostat responds to changes in the scene (system
wide manual overrides). Requires the installation of a User
Switch 479 to use this feature.
OFF
OFF
The thermostat does not respond to scenes.
3
ON
LOCK ACCESS LEVEL
Locked to ‘User’ access level. Set to Lock when installation
completed.
OFF
UNLOCK ACCESS LEVEL
Unlock to allow ‘User’ and “Installer’ access level. Set to
Unlock during installation process.
tekmarNet
®
reset control must also be set to Unlocked
(Installer access level).
4
ON
Not used
OFF
Not used
The thermostats’s exterior can be cleaned using a damp cloth. Moisten the cloth
with water and wring out prior to wiping the control. Do not use solvents or cleaning
solutions.
Cleaning the Thermostat
