tekmar 546 Thermostat Installation - Manual (Page 34)

© 2008 D 546 - 07/08 34 of 44
Optimum Start / Stop Section M
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. When cooling, the cooling system is
allowed to turn on 30 minutes prior to the beginning of a
period that requires cooling.
• • Locate the Optimum Start / Stop setting in the Adjust
menu.
Scenes Section N
Scenes are a function that is available on the thermostat.
•
• To use the scene function, go to the Scene menu and
set the Scene setting to On.
Scenes are a method of changing the temperature throughout
an entire building from a single thermostat. A permanent
scene remains in place until another scene is selected.
When a temporary scene is selected (Scenes 6, 7, 8), a
timer counts down and when it times out, devices return
to the last permanent scene selected.
See the Scene table for details regarding the timing of
Scenes. There are a total of eight Scenes available.
• • Default Scene: The default scene is Permanent 1. In a
typical installation, the thermostat will be set to follow
the scheduled event in the Permanent 1 scene.
• • Factory Set Scenes: Scenes 2, 3 and 6 are factory set
and force the thermostat to the Away, Unoccupied or
the Occupied temperature respectively.
• • Customizable Scenes: You can customize Scenes 1, 4,
5, 7, and 8 to either follow the scheduled event, or the
temperature can be forced to the Wake, Unoccupied,
Occupied, Sleep, or the Away temperature.
Note: If no schedule is available, the Scene menu selections
are limited to Occupied and Away
Scene Description Thermostat Operation
1 Permanent 1 Scheduled event, Wake, Unoccupied, Occupied, Sleep, Away
2 Permanent Away 2 Away
DHW demands are ignored (applies to outdoor reset modules)
Setpoint demands operate (applies to outdoor reset modules)
3 Permanent Unoccupied 3 Unoccupied
4 Permanent 4 Scheduled event, Wake, Unoccupied, Occupied, Sleep, Away
5 Permanent 5 Scheduled event, Wake, Unoccupied, Occupied, Sleep, Away
6 Temporary Occupied 6 Occupied for 3 hours
7 Temporary 7 Scheduled event, Wake, Unoccupied, Occupied, Sleep, Away for 4 hours
8 Temporary 8 Scheduled event, Wake, Unoccupied, Occupied, Sleep, Away for 8 hours