WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions
21
Occupancy Programming Example – Extended
Office Hours with Weekend Schedule
•
Setpoint: 70°F
•
Occupied from 8 A.M. to 6 P.M., Monday through
Friday
•
Occupied from 10 A.M. to 1 P.M., Saturday and
Sunday
Program the WT-4000 Series Room Thermostat
schedule setup screen as illustrated in Figure 30.
Room Thermostat Operational Modes
Scheduled Modes
Scheduled WT-4000 Series Pneumatic-to-DDC Room
Thermostat operational modes are regulated by the
HVAC schedules, as defined by the user. The HVAC
schedules can be set in advance through the building
automation system for wireless communicating
models, and locally at each room thermostat for
stand-alone models. The room thermostat executes the
HVAC schedules automatically.
Occupied Mode
Use the Occupied Mode when the room is scheduled to
be occupied. During the Occupied Mode, the room
temperature is defined by two values set by the room
thermostat configuration parameters:
•
Setpoint – the targeted room temperature for the
season
•
Comfort Zone – the optimal temperature range
around the setpoint
The room thermostat maintains the room temperature
within the Comfort Zone. If the room temperature falls
outside of the range of the Comfort Zone, the room
thermostat reacts accordingly and automatically
requests heating or cooling.
The room thermostat allows users to adjust the room
temperature using the local room thermostat, as long
as the desired room temperature is within the range of
the Comfort Zone. If the user requests heating or
cooling outside of the range of the Comfort Zone, the
request at the local room thermostat is overwritten by
the room thermostat configuration parameters.
Example: The setpoint temperature is 70°F (21°C) and
the range of the Comfort Zone is ±3F° (±1.8C°) around
the setpoint temperature. The user is manually able to
affect the room temperature only between 67 and 73°F
(19 and 23°C), regardless of the temperature
requested on the LCD of the local room thermostat.
Stand-alone room thermostats do not feature a
configurable Comfort Zone. Instead, stand-alone
models have a factory set range of ±14F° (±8.4C°)
around the installer-configured setpoint temperature in
the Occupied Mode.
Unoccupied Mode
Use the Unoccupied Mode to save energy during those
times when a room is unoccupied. The room
thermostat does not call for heating or cooling when the
room temperature is within the upper and lower
Unoccupied Mode temperature limits. If the room
temperature falls outside of the upper and lower
Unoccupied Mode temperature limits, the room
thermostat calls for heating or cooling to bring the room
temperature back within the Unoccupied Mode upper
and lower temperature limits.
F
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x
tn
d_
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ff
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rs
Weekday
1
Occupied
08:00
70
Weekday
2
Unoccupied
18:00
85
55
Weekend 1
Occupied
10:00
70
Weekend
2
Unoccupied
13:00
85
55
Figure 30: Occupancy Programming Schedule;
Extended Office Hours with Weekend Schedule
