tekmar 541 Thermostat - Manual (Page 15)

15 of 24 © 2007 D 541 - 08/07
Cool Groups Section G
Cool Group 1 Cool Group 2
Master Master Member Member Member
tN4
The thermostat can operate with other thermostats on a
tN4 network in a cool group. When operating as a cool
group, the air temperature readings of all the thermostats
in the group are averaged. A single thermostat controls the
operation of the cooling equipment and is called the cool
group master. This operation is based on the averaged
temperature of all the thermostats in the 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. The other thermostats are assigned
as members of the cool group. Cool groups are assigned
using a number 1 through 16 and there can be up to a
maximum of 16 cool groups on the entire tN4 network.
Each cool group can have up to 24 members.
• • To assign a thermostat as the cool group master of
group 1, go to the Adjust menu. Select Cool Master and
set to 01.
• • To assign a thermostat as a cool group member of
group 1, go to the Adjust menu. Select Cool Member
item and set to 01.
• • Repeat the same steps to set up additional cooling
groups.
Setting the Schedule Section H
Master
Schedule 1
Members of
Schedule 1
Members of
Schedule 2
Master
Schedule 2 None
Zone
Schedule
Zone 1 2 3 4 5 6 7 8
Master Schedule
If the thermostat is connected to other thermostats, then the
thermostat can follow a master schedule. You can set up
a maximum of four master schedules on the tN4 network.
A master schedule is available to all devices on the tN4
network. Master schedules simplify installation since one
master schedule may be used by multiple devices.
To follow a master schedule
1. Assign the thermostat to follow a master schedule, by
setting the Heat Schedule menu item in the Schedule
menu to Member (MBR) 1 to 4.
Optimum Start / Stop Section I
Occ
70°F (21°C)
UnOcc
65°F (18°C)
Room
Temp.
Delay Period
Without Optimum Start/Stop
Optimum Start/Stop
Recovery Period
10P.M. 11P.M. 8A.M. 11A.M.
9P.M. 10P.M. 5A.M. 8A.M.
Occ
70°F (21°C)
UnOcc
65°F (18°C)
Room
Temp.
Delay Period Recovery Period
Optimum
Stop
Optimum
Stop
Setback
Period
Optimum
Start
Setback
Period
When using a schedule, there is a time lag as one event
transitions to another. The four possible transitions are:
•
• Wake to Unoccupied
•
• Unoccupied to Occupied
•
• Occupied to Sleep
•
• Sleep to Wake
When an outdoor temperature measurement is available,
the Optimum Start / Stop feature predicts how long the
temperature transition takes. This allows the thermostat to
operate the heating or cooling system before the scheduled
event in order to have the room at the desired temperature
at the scheduled event time.
When an outdoor temperature measurement is not
available, then the Optimum Start / Stop feature operates
slightly differently. First, the thermostat predicts how long
the transition takes when changing from a low temperature
to a high temperature. It does not track transitions where
the temperature setting drops from a high temperature to
a low temperature.
• • Locate the Optimum Start / Stop setting in the Adjust
menu.