23 of 28 © 2009 D 527 - 06/09
Cool Group Member (527 and 528 Only)
Cool Group 1
Master
MemberMember
tN2 Communication
In order to prevent heating and cooling at the same time, the
527 and 528 can operate together with other thermostats
in the tekmarNet
®
system to form a cool group.
In a cool group, one thermostat is assigned as the cool
group master. The cool group master operates the cooling
equipment for the group. Thermostats 527 and 528 can be
members of ‘Cool Group 1’, allowing them to be included
within the same cooling zone as the master thermostat.
When operating as a cool group, the air temperature
readings of all the member thermostats are communicated
to the cool group master and a temperature average is
determined.
When the cool group master is in cooling operation, the
member thermostats do not operate for space heating;
however, if a floor minimum temperature is set, then floor
warming can continue while the cooling is on.
If the Set Room Heat temperature is adjusted while the
cool group is cooling, the snowflake icon is flashed to alert
the user that the cooling is presently on. Once the cooling
shuts off, the heating can start operation after a 30 minute
interlock has expired.
To join “Cool Group 1”, set switch 3 to “Cool Member 1”
(down).
Cool Group Master (530 Only)
Cool Group 1
Master
MemberMember
tN2 Communication
In order to prevent heating and cooling at the same time,
this thermostat can operate together with other thermostats
on a tekmarNet
®
system to form a cool group.
The Thermostat 530 can be set as the Cool Group 1 master.
The cool group master operates the cooling equipment for
the group. Other thermostats can be set to be members
of the cool group.
When operating as a cool group, the air temperature readings
of all the cool group member thermostats are displayed on
the master as an average.
The Thermostat 530 shows this cool group average
temperature as the “Room” temperature while the mode is
set to Cool, or the mode is set to Auto and the thermostat
is allowing cooling operation. In all other modes, the cool
group master thermostat measures and displays the built-in
“local” temperature sensor measurement.
Fluctuations in the displayed “Room” temperature may
occur during automatic mode switch over when the display
changes from using the local temperature for heating to
using the cool group average temperature for cooling.
When this thermostat is set to Cool mode or is cooling in
Auto mode, the cooling system is operated to maintain the
Set Room Cool setpoint and all thermostats in the cool
group do not operate for space heating. However, cool
group member thermostats that have a floor minimum
temperature set are able to continue heating.
This thermostat is the master of Cool Group 1 when switch
setting 3 is set to “Cool Master 1” (down).
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