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Low Battery Signal; Override Button - Honeywell TR21-WS Installation Instructions Manual

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Controller
1.
Spyder/ComfortPoint
20Kohm, XL 10
2.
Honeywell Other
3.
10K type 2
4.
10K type 2
5.
10K type 2
6.
10K type 2
(ComfortPoint 10K
ohm controllers)

Low Battery Signal

When there are approximately 2 months of battery life
remaining, the LED on the front of the wall module (next to the
Override button) will flash red every 15 seconds. In addition,
the LOW BAT digital output from the receiver will close. This
LOW BAT output signal can be sent to an unused DI on the
controller to let the user know that there is a low battery
condition. Replace the batteries whenever the LOW BAT
contact closes, or flashing red light is seen next to the
Override LED on the face of the wall module. Normal
operation will automatically resume.
NOTE: If the batteries go dead, the LOW BAT digital output
(open/close) signal will open again. The LOW BAT
digital output will close only when batteries are run-
ning low, not when they are completely dead, or are
not installed. This ensures that a lack of signal is not
confused with dead or missing batteries. Whenever
there is no signal, or batteries have gone completely
dead, the receiver LOWBAT output will send an open
circuit reading to the controller for temperature (and
set point, if applicable).

Override Button

To save battery life, the override button LED will only light
when the button is pressed. It will not remain lit, as on
standard wired TR23 and TR24 models. Override will still be
activated when the button is pressed. If using with the XL10,
pressing and briefly holding the override button will cause it to
behave like other standard wired TR23s. The LED will
remain lit for 9 seconds max. to confirm it has been pressed
from 1-4 seconds.
REPLACING A WALL MODULE
When replacing a wall module, set the DIP switches the same
as the wall module being replaced. If the previous wall module
DIP switches are all set to OFF, it will be necessary to reset
the S2 and S3 receiver dip switches to any configuration not
Table 3. Controller Descriptions.
Default setting. For use with Spyder and Comfort Point 20K ohm controllers
For use with XL10 VAV, W7750, W7751, etc.
For use with XL600/500/100.
10K ohm NTC type 2 output, 2K-3K ohm knob span:
• Common
• Temperature (Override button temporarily shorts the temperature output)
• Setpoint
10K ohm NTC type 2 output, 1K -11K ohm knob span.
10K ohm NTC type 2 output, 0-10K ohm knob span:
• 10K out
• Common (for temperature, override, and setpoint)
• Override
• Setpoint
10K ohm NTC type 2 output, 0-9500 ohm knob span:
• Common
• Temperature (Override button temporarily shorts the temperature output)
• Setpoint
7
TR21-WS, TR23-WS, TR21-WK, TR23-WK, WRECVR
Description
being used by other receivers in the area, and then set the
wall module DIP switches to the same setting. At least one of
the 12 DIP switches must be set to the ON (up) position.
General Rules for Installing Wireless
Wall Modules
Communication between the wall module and receiver can be
influenced by a number of factors. Type and thickness of
building materials and the way in which they are oriented in
relation to the wall module and receiver will affect
communication. Try to orient the wall module and receiver so
that if they are separated by a wall(s), the direction of signal
travel is as perpendicular to the wall(s) as possible. This
reduces the effective wall thickness.
Do not place either the wall module or receiver inside metal
cabinets or enclosures. Signal reliability can be diminished if
the receiver is installed in metal fan coil units. Older buildings
may have plaster and lathe walls with metal mesh that can
significantly reduce signal strength.
When mounting the receiver on a metal duct, stronger
communication is possible if the wall module is on the same
side of the duct so the signal doesn't need to travel through
the metal duct.
Standard drywall (gypsum board) does not greatly affect
signal strength.
Be aware that occasional signal drop outs may occur in any
wireless installation, and the controller must be able to
accomodate for sensor and setpoint outputs from the receiver
that may occasionally go into a brief open circuit mode.
Reduce as much as possible the amount of metal (ducts, file
cabinets, etc.) between and around the sensor and the wall
module.
For the most robust wireless link, install the wall module in
locations with the strong signal (Green light as described in
Table 1). While the signal may appear green at any given
moment, movement of people, repositioning of furniture or
62-0291—09

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This manual is also suitable for:

Tr21-wkTr23-wsTr23-wkTr21-wsuTr23-wsuWrecvr ... Show all