T-4002-20x Room Thermostat Installation Guide

Текст документа

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# T-4002 Room Thermostat

24-3931-2, Rev. A

The T-4002 Room Thermostat is a single temperature controller that provides a proportional output air signal to modulate pneumatic controlled devices in response to a temperature change.

## Models

| Action | Mounting | T-4002 Suffix |
| --- | --- | --- |
| Direct | Horizontal | -201 |
| | Vertical | -203 |
| Reverse | Horizontal | -202 |
| | Vertical | -204 |

## Specifications

| Supply Pressure | 13 to 25 PSIG (91 to 175 kPa) Nominal 20 PSIG (140 kPa) Air Supply Must Be Clean, Dry, and Oil Free |
| --- | --- |
| Sensitivity | Adjustable from .75 to 4 PSI/F° (9 to 50 kPa/C°); Factory Set at 2.5 PSI/F° (31 kPa/C°) |
| Air Consumption | 20 SCIM (5.5 mL/s) |
| Output Flow Capacity | 400 SCIM (109 mL/s) |
| Ambient Temp. Limits | -20 to l30F (-29 to 54°C) |
| Air Connections | Barbed Fittings for 5/32 in. O.D. Poly tubing |

*The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products*

## Factory Calibration

The T-4002 is factory calibrated to send an 8 ± 1 PSIG (56 ± 7 kPa) output signal when the room temperature is at the setting on the dial. The element (and dial) is calibrated at 20 PSIG (140 kPa) supply.

Issued March, 2016
Part No. 24-3931-2, Rev. A

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# Mounting

Note: When handling the unit, leave the front of the blisterpack on to protect the instrument until mounting is complete.

Room thermostats can be connected directly with 5/32 in. O.D. polytubing to barbed fittings on the back of the unit. The fittings are designated "S" for supply and "O" for output. If the installation was roughed in with 1/4 in. polyurethane tubing, use short lengths of black 5/32 in. tubing as couplers to make the connection. Secure the thermostat tight against the mounting bracket with the hex head screws on the corners of the unit.

If the installation was roughed in with a plastic terminal connector on the mounting bracket, simply fit the barbed fittings into the terminal connector and secure the thermostat tight against the mounting bracket with the hex head screws on the corners of the unit.

If the thermostat is to be installed on an old T-4000 copper tube pipehead, install two 1/2 in. long, 5/32 in. pieces of polyurethane tubing on the fittings. Install the thermostat over the pipehead and secure the unit tight against the mounting bracket.

## Set Point Adjustment (See Fig. 2)

1. Furnish 20 PSIG (140 kPa) supply pressure to the instrument.
2. Determine the exact temperature at the element.
3. Turn the set point dial to that temperature.
4. Turn the calibration screw to provide an output pressure equal to the mid spring range of the controlled device.
5. Turn the set point dial to the desired temperature.

Fig. 1: Back View of Instrument

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## Operational Checkout

1. Furnish 20 PSIG (140 kPa) supply pressure to the instrument.
2. Slowly increase the dial setting.
3. Check for a gradual decrease in output pressure on the direct acting (DIR) model or increase in output pressure on the reverse acting (REV) model.
4. Slowly decrease the dial setting.
5. Check for a gradual increase in output pressure on the DIR model or decrease in output pressure on the REV model.
6. If a pressure buildup and drop is not observed as mentioned above, refer to Repair Information.

Fig. 2: T-4002 Adjustments

*(Figure labels: VISIBLE STRIPES INDICATE DIRECT ACTING ELEMENT — D.A. — SET POINT DIAL — CALIBRATION SCREW — INCREASE SENSITIVITY / SLIDER / DECREASE — OUTPUT PRESSURE TEST GAGE)*

## Sensitivity Adjustment

The T-4002 is factory set at 2.5 ± 0.5 PSI/F° (31 ± 6 kPa/C°). Some situations may require a sensitivity adjustment for proper control system operation. To do so, move the sensitivity slider to the left to increase or to the right to decrease the sensitivity setting.
If the output pressure changes due to moving the slider, restore the output pressure to its original value by turning the adjustment screw on the slider clockwise to decrease or counterclockwise to increase the pressure. Note: This screw is not intended for set point calibration. Refer to Figure 2.

## Repair Information

If the T-4002 fails to operate within its specifications, refer to the Counterline Catalog for appropriate repair parts.

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## Mounting

Note: When handling the unit, leave the front of the blisterpack on to protect the instrument until mounting is complete.

Room thermostats can be connected directly with 5/32 in. O.D. polytubing to barbed fittings on the back of the unit. The fittings are designated "S" for supply and "O" for output. If the installation was roughed in with 1/4 in. polyurethane tubing, use short lengths of black 5/32 in. tubing as couplers to make the connection. Secure the thermostat tight against the mounting bracket with the hex head screws on the corners of the unit.

If the installation was roughed in with a plastic terminal connector on the mounting bracket, simply fit the barbed fittings into the terminal connector and secure the thermostat tight against the mounting bracket with the hex head screws on the corners of the unit.

If the thermostat is to be installed on an old T-4000 copper tube pipehead, install two 1/2 in. long, 5/32 in. pieces of polyurethane tubing on the fittings. Install the thermostat over the pipehead and secure the unit tight against the mounting bracket.

## Set Point Adjustment (See Fig. 2)

1. Furnish 20 PSIG (140 kPa) supply pressure to the instrument.
2. Determine the exact temperature at the element.
3. Turn the set point dial to that temperature.
4. Turn the calibration screw to provide an output pressure equal to the mid spring range of the controlled device.
5. Turn the set point dial to the desired temperature.

Fig. 1: Back View of Instrument

## Operational Checkout

1. Furnish 20 PSIG (140 kPa) supply pressure to the instrument.
2. Slowly increase the dial setting.
3. Check for a gradual decrease in output pressure on the direct acting (DIR) model or increase in output pressure on the reverse acting (REV) model.
4. Slowly decrease the dial setting.
5. Check for a gradual increase in output pressure on the DIR model or decrease in output pressure on the REV model.
6. If a pressure buildup and drop is not observed as mentioned above, refer to Repair Information.

VISABLE STRIPES INDICATE DIRECT ACTING ELEMENT — D.A.
SET POINT DIAL
CALIBRATION SCREW
←INCREASE SENSITIVITY
SLIDER
DECREASE→
OUTPUT PRESSURE TEST GAGE

Fig. 2: T-4002 Adjustments

## Sensitivity Adjustment

The T-4002 is factory set at 2.5 ± 0.5 PSI/F° (31 ± 6 kPa/C°). Some situations may require a sensitivity adjustment for proper control system operation. To do so, move the sensitivity slider to the left to increase or to the right to decrease the sensitivity setting.

If the output pressure changes due to moving the slider, restore the output pressure to its original value by turning the adjustment screw on the slider clockwise to decrease or counterclockwise to increase the pressure. Note: This screw is not intended for set point calibration. Refer to Figure 2.

## Repair Information

If the T-4002 fails to operate within its specifications, refer to the Counterline Catalog for appropriate repair parts.

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European Single Point of Contact: JOHNSON CONTROLS, WESTENDHOF 3, 45143 ESSEN, GERMANY | NA/SA Single Point of Contact: JOHNSON CONTROLS, 507 E MICHIGAN ST, MILWAUKEE WI 53202, USA | APAC Single Point of Contact: JOHNSON CONTROLS, C/O CONTROLS PRODUCT MANAGEMENT, NO. 22 BLOCK D NEW DISTRICT, WUXI JIANGSU PROVINCE 214142, CHINA

# T-4002 Room Thermostat

The T-4002 Room Thermostat is a single temperature controller that provides a proportional output air signal to modulate pneumatic controlled devices in response to a temperature change.

## Models

| Action | Mounting | T-4002 Suffix |
|---|---|---|
| Direct | Horizontal | -201 |
| | Vertical | -203 |
| Reverse | Horizontal | -202 |
| | Vertical | -204 |

## Specifications

| | |
|---|---|
| Supply Pressure | 13 to 25 PSIG (91 to 175 kPa)<br>Nominal 20 PSIG (140 kPa)<br>Air Supply Must Be Clean, Dry, and Oil Free |
| Sensitivity | Adjustable from .75 to 4 PSI/F° (9 to 50 kPa/C°); Factory Set at 2.5 PSI/F° (31 kPa/C°) |
| Air Consumption | 20 SCIM (5.5 mL/s) |
| Output Flow Capacity | 400 SCIM (109 mL/s) |
| Ambient Temp. Limits | -20 to l30F (-29 to 54°C) |
| Air Connections | Barbed Fittings for 5/32 in. O.D. Poly tubing |

*The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products*

## Factory Calibration

The T-4002 is factory calibrated to send an 8 ± 1 PSIG (56 ± 7 kPa) output signal when the room temperature is at the setting on the dial. The element (and dial) is calibrated at 20 PSIG (140 kPa) supply.

(0884)
24-3931-2
Rev. -

Позиції каталогу з цим документом

• T-4002-201 — Термостат; прямой, горизонтальный, F
• T-4002-202 — Термостат реверсивный, горизонтальный, F

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