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White Rodgers 1F95-1277 Big Blue Universal Thermostat Instruction Manual
PROGRAMMING
Wired Remote Temperature Sensing
One remote temperature sensor can be installed indoor or
outdoor and connected to the thermostat by a maximum
cable length of 100 meters (300 feet). Terminals +, S and -
on the terminal block allow connection of the remote sensor.
The thermostat must have 24 VAC Common connection to
terminal C for the remote sensor to operate. The remote
sensor can be enabled or disabled in the Installer/Configura-
tion menu, item 25.
Example: Local sensor temperature is 80° and the remote
sensor is 70°.
If weight is selected H4, the averaged temperature of 72° will
be displayed.
(1 x 80) + (4 x 70) / 5 = 72°
If weight is selected A2, the average temperature of 73° will
be displayed.
(1 x 80) + (2 x 70) / 3 = 73.3°
When remote sensor, Remote, is selected Off (factory
default), no remote sensor is enabled. When remote sensor
is selected On, the next step is to select the remote as
indoor, Remote In, or outdoor, Remote Outdoor. If the
remote is selected as Remote In, an additional step will be to
select if the temperature shown on the display will be from
the thermostat, LS On, or the remote sensor Ls Off.
If weight is selected L1, the average temperature of 75° will
be displayed.
(1 x 80) + (1 x 70) / 2 = 75°
The example shows that the weight selected would prioritize
the overall averaged temperature between the two sensors.
The high weight selection caused the remote sensor to have
a higher influence in the calculated temperature average
than the local sensor and the low weight selection caused
the remote sensor to have less influence.
In normal operation, when a remote sensor is enabled the
time digits of the display will alternate between the time and
the remote temperature for three seconds each. Above the
remote temperature will be Remote, for indoor sensor or
Outdoor Remote, for outdoor sensor. If the remote sensor is
an indoor sensor and the local display has been disabled,
the temperature displayed as the room temperature will be
the remote sensor temperature.
Dual Fuel Temperature Setpoint
When the thermostat is configured for Heat Pump mode and
an outside remote sensor is installed, the thermostat can
monitor the outside temperature. When the outside tempera-
ture falls below a user selectable temperature, the thermostat
will switch to gas heat and shut down the compressor. This
eliminates the need for a fossil fuel kit.
Sensing Range:
Outdoor temperature range is -40 to 140oF
Indoor temperature range is 32 oF to 99oF
The user selectable temperature is called the dual fuel
temperature setpoint, dF and is set in the Installer/Configura-
tion menu, item 26. The dual fuel temperature setpoint can
be set to a temperature of 5 through 50. A selection of 5
(default setting) disables this feature and menu selection of
Cd will not be available.
Weight of Remote Reading:
The thermostat is designed to receive the temperature of the
indoor remote sensor and average, or weight, it with the local
sensor in the thermostat for each program period. The
averaging will be active only when the local sensor and the
indoor remote sensor are both functional and enabled in the
Installer/Configuration menu.
After the dual fuel temperature setpoint is set above 5 and
is pressed, a delay, Cd, can be set for compressor shutdown
after the auxiliary stage is energized. This delay can be set
from 0 seconds to 99 seconds to minimize the time that the
system may blow cooler air until the alternate source of heat
comes on. Default setting for delay is 60. When setting the
When the thermostat is in the Set Schedule mode, the weight
of the indoor sensor will be shown in the current temperature
digits of the display. The weight will show as A2 (average
and default), H4 (high) or L1 (low). Pressing the
and
delay if the
or
keys are held depressed, the setpoint
keys at the same time will change the weight for the program
period. The weight of the local sensor is fixed.
will increase or decrease at the rate of one degree every half
second for the first three seconds and double the speed after
three seconds.
In normal operation of the thermostat, the current tempera-
ture displayed will be the weighted average of the local
sensor and the remote sensor using the formula (local
sensor weight x local sensor temperature) + (remote sensor
weight x remote sensor temperature) / (local sensor weight +
remote sensor weight).
10
| General | Details |
|---|---|
| Name | White Rodgers 1F95-1277 Big Blue Universal Thermostat Instruction Manual |
| Make | WHITE RODGERS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.4 MB |
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