tekmar 512 Programmable Thermostat Installation - Manual (Page 3)

3 of 20 © 2009 D 512 - 09/09
AUXILIARY SENSORS
The thermostat has a single built-in sensor to measure air temperature at the thermostat. In
addition to the built-in sensor, the thermostat has terminals to connect up to two separate
sensors. These sensors can be either indoor sensors, slab sensors, a remote sensor, or
an outdoor sensor.
Indoor Sensor
An indoor sensor is used to measure the air temperature in the zone that the thermostat
is controlling. The temperature being read by the indoor sensor is used in the calculations
of the on times for the relay(s) in the thermostat. Either one or both of the auxiliary sensor
inputs can be configured for indoor sensors. This setting is made through the Adjust menu
of the thermostat. If more than one sensor, either the built-in sensor or an auxiliary sensor
set as an indoor sensor, is being used to measure the zone temperature, the temperature
of the active sensors is averaged and used to calculate the on time of the relay(s).
Slab Sensor
A slab sensor is used to measure the slab temperature in the zone that the thermostat
is controlling. The temperature being read by the slab sensor is used in the calculations
of the on time for the Heat relay and allows the thermostat to operate the slab between
the slab minimum and slab maximum settings. If more than one slab sensor is used, the
slab temperatures are averaged by the thermostat.
Remote Sensor
A single remote sensor can be connected to the thermostat. The temperature
measured by a remote sensor does not affect the on time of the relays and is only
used for display purposes.
Outdoor Sensor
A single outdoor sensor can be connected to the thermostat. The temperature measured
by an outdoor sensor does not affect the on time of the relays and is only used for display
purposes.
ACCESS LEVELS
The tekmar Programmable Thermostat has two
access levels. These access levels restrict the
number of items available in the menus of the
thermostat. The two access levels are User and
Installer. This selection is made using the DIP
switch located on the circuit board inside the
thermostat.
The Installer access level allows the installer to
adjust all of the settings in the thermostat including
those required to match the thermostat to the
mechanical system and the devices used.
The User access level allows the end user to
adjust the time, temperatures and schedules used
by the thermostat.
Po
w
er
: 2
4
V
± 1
0%
60 Hz 3 V
A
Re
la
y:
24
V (
ac) 2
A
Class 2
938-
02
51
2
Switch Se
ttings
:
Ins
taller/User
2 Stag
e/Heat-
Cool
Made in Canada Mee
ts Class B:
Canadian ICES FCC P
ar
t 1
5
Dip Switch