Bryant II TSTAT-0-16 Instruction Manual download pdf (Page 6)

OPTION 14—HEAT/COOL DEAD BAND ADJUSTMENT

This option selects the minimum difference between heat and cool

set points. A larger difference saves energy and a smaller differ-

ence decreases temperature difference between heating and cool-

ing. Factory default is 2, which means cooling set point must be a

minimum of 2° above heating set point. An attempt to move them

closer will result in one "pushing" the other to maintain the

required difference.

Depending on set points, moving dead band closer than 2° may

result in regular cycling between heat and cool when AUTO mode

is selected. However, this cycling cannot occur more often than 1

transition every 20 minutes. The system has a built-in requirement

that it cannot switch between heat and cool without a 20 minute

"off" time between the 2 operations. Specifically, to switch from 1

mode to the other, there must be no demand for the old mode and

a demand for the new mode, and this must exist continually for 20

minutes before transition to the new mode will occur.

TO SELECT:

1. Enter configuration mode if not already there. See Step 4

"To enter Configuration Mode." Use up and down buttons

to make small (now flashing) display indicate 14.

2. Press SET TIME/TEMP button once to flash large display.

3. Use up or down buttons to move between 0, 1, 2, 3, 4, 5, or

6 on large display. Factory default is 2.

4. Press SET TIME/TEMP button again to flash upper small

display for selection of another option, or press END to exit

configuration mode.

OPTION 15—ENABLE AUTO MODE

This option allows the installer to enable or disable AUTO mode

(automatic changeover between heat and cool). When disabled,

AUTO icon does not appear when successive presses of MODE

button are used to move between OFF, HEAT, COOL, and

EHEAT (in heat pump systems). Factory default is ON (AUTO

enabled).

TO SELECT:

1. Enter configuration mode if not already there. See Step 4

"To Enter Configuration Mode." Use up and down buttons

to make small (now flashing) display indicate 15.

2. Press SET TIME/TEMP button once to flash large display.

3. Use up and down buttons to move between OF and ON on

large display. Factory default is ON (AUTO enabled).

4. Press SET TIME/TEMP button again to flash upper small

display for selection of another option, or press END to exit

configuration mode.

OPTION 16—RESERVED FOR FUTURE USE

OPTION 17—ENABLE NON-PROGRAMMABLE OPERA-

TION

This option converts the programmable Thermidistat Control to a

non-programmable control for those users who do not want

programmability. The clock is retained, but the days of the week

and the daily schedules have been eliminated, making it operate as

if HOLD were permanently ON. Some of the buttons (used in

programming only and now not needed) are redefined to simplify

the non-programmable operation. To match these redefined but-

tons, a new keypad label, included with the Thermidistat, must be

placed over the original keypad label. Fig. 2 shows both the

original keypad label and the non-programmable keypad label.

When this option is selected, the new keypad label must be applied

over (or in place of) the original. Because these adhesive-backed

keypad labels are not designed to be removed, this conversion

should be considered permanent. Once the change to non-

programmable operation is done, a procedure is not provided to

easily change it back. Should this change be needed, it is best to

trade the Thermidistat for one which has not been converted.

Both programmable and non-programmable versions of the Ho-

meowner’s Manual are available.

Once it has been determined that a particular installation is to be

made non-programmable, the only changes required are:

• Attach non-programmable keypad label over original program-

mable one.

• Set Configuration Option No. 17 to ON.

To attach the provided non-programmable keypad label, carefully

peel off its backing and apply it over the original keypad label.

PLEASE HEED: Once the new keypad label makes contact, it will

stick firmly in place and adjustments cannot be made. CARE-

FULLY locate an edge of the keypad label, making sure its

position and orientation are correct. Then, from the attached edge,

smooth the rest of the keypad label over the original. Make sure the

new keypad label does not interfere with the motion of the buttons

which it surrounds.

TO SELECT:

1. Enter configuration mode if not already there. See Step 4

"To Enter Configuration Mode." Use up and down buttons

to make small (now flashing) display indicate 17.

2. Press SET TIME/TEMP button once to flash large display.

3. Use up and down buttons to move between OF and ON on

large display. Factory default is OF.

4. Press SET TIME/TEMP button again to flash upper small

display for selection of another option, or press END to exit

configuration mode.

E. Redefinition of Buttons

Fig. 2 shows the original (programmable) button labels on the left

and the redefined (non-programmable) buttons on the right. In the

figure, the buttons are numbered for easy reference. They are not

numbered on the actual product. Six of the buttons (numbers 1

through 5 and 9) have been redefined.

Button 3 originally alternated between time, cool set point, and

heat set point with each press. Now, button 1 selects the cool set

point, button 2 selects the heat set point, and button 3 selects time,

now used only to set the clock. Note that the days of the week are

gone.

Button 5 used to alternate between humidify and dehumidify. Now

button 4 selects dehumidify and button 5 selects humidify.

Button 9 now loses the HOLD label, making it END only. This

button is only used to END the humidity screen and the configu-

ration mode.

These changes both simplify operation for the homeowner and find

use for the buttons which are no longer needed when programma-

bility is removed.

V. SYSTEM START-UP AND CHECKOUT

The Thermidistat Control is designed with a built-in installer test

capability. It allows easy operation of equipment without delays or

set point adjustments to force heating or cooling.

To enable installer test mode, move DIP switch No. 4 to ON

position. To access this switch, open case as described in Step 2.

Use the corner of a small screwdriver to slide switch No. 4 to ON

position.

While in installer setup mode, clock will display "InSt," FAN

button will control fan, and MODE button will control heating and

cooling.

A. To Test Fan:

F,an button switches FAN icon between AUTO and ON. While

ON is displayed, G output will be on, turning fan on. Allow up to

10 sec after button is pressed for fan to turn on and off. On some

fan coils, fan continues to operate for 90 sec after G signal is

removed.

—6—

→

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

Comments to this Manuals

No comments

Bryant II TSTAT-0-16 Instruction Manual Page 6

Comments to this Manuals

Related products and manuals for Thermostats Bryant II TSTAT-0-16