TAC 2211 Series One Pipe Pneumatic Room Thermostats Instructions

TAC 2211 Series One Pipe Pneumatic Room Thermostats

Application

The 2211 Series Pneumatic Room Thermostat is designed for proportional control of pneumatic devices and actuators in environmental control systems. These one-pipe thermostats are force-balanced and utilize an external restrictor in the supply line. Their design incorporates a highly sensitive bimetal thermostatic element and a ball valve for pneumatic feedback, which ensures accuracy and stability over the entire operating range.

These thermostats have a serrated thumb wheel for setpoint adjustment. Models are also available with preassembled internal dial stops. Thermostat covers are available in various styles to meet particular requirements. Cover options include models with a setpoint scale and a thermometer, a setpoint scale only, a thermometer only, or blank. An external setpoint adjustment cover is available on some models or can be field-installed on covers where desired.

Features

• Factory-calibrated, stainless steel ball-in-seat provides pneumatic feedback for stable, linear operation.
• Easy-to-use throttling range adjustment and recalibration.
• Adjustable (patented) bimetal shows actual throttling range in both °F and °C. Adjustable 2 to 12 °F (1 to 6.7 °C)
• Leak-proof, self-closing branch gauge tap.

Full Dial Cover Shown
(Covers must be ordered separately except as noted.)

SPECIFICATIONS

• Action: Proportional.
• Setpoint Range: 55 to 85 °F (13 to 29 °C).
• Throttling Range: 2 to 12 °F adjustable.
• Supply Air Pressure: 20 psig.
• Maximum Air Pressure: 30 psig.
• Main Air Consumption: 30 scim.
• Calibration Point: 9 psig branch line pressure when ambient equals setpoint.
• Setpoint Adjustment: Serrated thumbwheel.
• Construction:
  • Mechanical Components Die cast aluminium, stainless steel, and glass-filled nylon.
  • Diaphragm, Fabric-reinforced Neoprene.
  • Air Lines, Connect to thermostat nipples with spring-reinforced plastic tubes.
  • Branch Connections, Equipped with internal filters.
• Environment
  • Humidity: 5 to 95% relative humidity, non-condensing.
  • Locations: NEMA Type 1.

ORDERING DATA

Table-1 Model Chart — Thermostats.

Direct

| ****

Includes (1) 1/4″ x 3/16″ barbed coupling, 20-693 tubing, 20-714 wall plate, 20-711 mounting plate, and mounting screws.

2211-112 a| T12-3011
2211- 013| T13-301| ****

Reverse

2211-113 a| T13-3011

These models have factory-installed 20-712 dial stop kits.

Table-2 Model Chart — Thermostat Replacement Kits.

20-042 mounting plate, mounting screws,

20-693 tubing and 2890-011

convertible cover.

2211- 412

| ****

T13-301

| ****

Reverse

Table-3 Model Chart — Uni-Kits ® .

dial cover with blank cover conversion, and 22-022 Conversion Kit.
2211-513 a| T13-3011| Reverse
2211- 612| T12-301| Direct| Includes thermostat, 22-1033 full dial cover with blank cover conversion, and 22-023 conversion kit.
2211- 613| T13-301| Reverse

These models include factory-installed 20-712 dial stop kits.

Table-4 Covers.

Wholesale Number| Replaces Model| Colour| Material| Dial Markings| Setpoint Adjustment| Thermometer
---|---|---|---|---|---|---
21- 923| C1-42| Satin Chrome| Metal| ****

55 to 85 °F

| ****

Yes

| ****

No

22- 923| C1-46| ****

Plastic

22- 823| C1-47| Beige
22- 1023| C1-48| Euro-white| 10 to 30 °C
21- 928 a| C2-42| ****

Satin Chrome

| Metal| ****

Blank

| ****

Concealed

22- 928 a| C2-46| ****

Plastic

22- 828 a| C2-47| Beige
22- 1028 a| C2-48| Euro-white
21- 933| C3-42| ****

Satin Chrome

| Metal| ****

55 to 85 °F

| ****

Yes

| ****

Yes (External)

22- 933| C3-46| ****

Plastic

22- 833| C3-47| Beige
22- 1033| C3-48| Euro-white| 10 to 30 °C
21- 939 a| C4-42| ****

Satin Chrome

| Metal| ****

55 to 85 °F

| ****

Concealed

22- 939 a| C4-46| ****

Plastic

22- 839 a| C4-47| Beige
22- 1039 a| C4-48| Euro-white| 10 to 30 °C
21- 943| C5-42| ****

Satin Chrome

| Metal| ****

Cooler – Warmer

| ****

Yes

| ****

No

22- 943| C5-46| ****

Plastic

22- 843| C5-47| Beige
22- 1043| C5-48| Euro-white
21- 948| C6-42| ****

Satin Chrome

| Metal
22- 948| C6-46| ****

Plastic

22- 848| C6-47| Beige
22- 1048| C6-48| Euro-white
21- 957 a| C11-42| ****

Satin Chrome

| Metal| ****

None

| ****

Concealed

| ****

Yes (External)

22- 957 a| C11-46| ****

Plastic

22- 857 a| C11-47| Beige
22- 1057 a| C11-48| Euro-white
Wholesale Number| Replaces Model| Color| Material| Dial Markings| Setpoint Adjustment| Thermometer
---|---|---|---|---|---|---
21- 960 a| C14-42| Satin Chrome| Metal| ****

Blank

| ****

Concealed

| ****

Yes (Internal)

22- 960 a| C14-46| ****

Plastic

22- 860 a| C14-47| Beige
22- 1060 a| C14-48| Euro-white
2890-010 a| Kit| ****

Satin Chrome

| Metal| ****

55 to 85 °F

or Blank

| ****

Yes or

Concealed

| ****

No

2890-011 a| Kit| ****

Plastic

2890-012 a| Kit| Beige
2890-013 a| Kit| Euro-white| 10 to 30 °C

or Blank

Thermostat covers with concealed setpoint adjustment, and thermostat cover kits include setpoint adjustment covers 21-800 (black) or 21-801 (Euro-white).

Table-5 Accessories.

TYPICAL APPLICATIONS

TYPICAL APPLICATIONS (Piping Diagram)

INSTALLATION

Inspection
Inspect the package for damage. If damaged, notify the appropriate carrier immediately. If undamaged, open the package and inspect the device for obvious damage. Return damaged products.

Requirements

• Tools (not provided):
  • Appropriate screwdriver for mounting the thermostat
  • 20-881 Thermostat calibration and cover screw wrench (or 1/16” and 1/4” hex wrenches)
• Training: Installer must be a qualified, experienced technician
• Appropriate accessories
• Piping diagrams

Location

Caution:

• Do not locate the thermostat near sources of heat or cold, such as lamps, motors, sunlight, or concealed ducts or pipes. Doing so will affect the accuracy of the thermostat.
• Avoid installing the thermostat on the outside walls. If such a location is necessary, mount the thermostat on an insulated back plate (accessory item).
• Mount thermostats only after the wall surfaces have been finished.

Locate the thermostat where it will be exposed to an unrestricted circulation of air, which represents the average temperature of the controlled space.

Mounting

Standard Mounting Options

Mount the thermostat according to the applicable figure (Figure 2 through Figure 9). See Figure 11 for mounting dimensions.

1. The pneumatic thermostat replacement kits 2211-612 and 2211-613 include a thermostat, a 22-1033 Euro-white cover, and a 22-023 thermostat conversion kit.
2. Provided in the 22-023 thermostat conversion kit.
3. Optionally, the thermostat may be mounted with the #6 x 1 in. self-tapping screws provided in the 22-023 kit.
4. Use the #8 x 1 in. mounting screws provided in the 22-023 kit when mounting the wall plate directly to the wall, without an electrical box.
   Figure 6 Thermostat Mounted with 22-023 Thermostat Conversion Kit.

Optional Mounting
Eliminate the pipe head fitting by using the 22-022 thermostat conversion kit and the included instructions, plus the following:

• 1/4″ Plastic Air Lines: Install the 1/4″ barbed coupling into the airline. Connect the tube assembly to the 3/16″ end of the coupling.
• 1/4″ Copper Air Lines: Solder the barbed coupling into the copper line. The tube assembly can then be connected to the 3/16″ end of the coupling.

CALIBRATION

Calibration and Throttling Range Setting The 2211 series thermostats are factory-calibrated and are shipped with the throttling range set at 3 °F. They should not require calibration upon installation. However, if it is necessary, change the calibration or throttling range setting as follows:

1. Remove the thermostat cover, using a 20-881 thermostat wrench (1/4” hex wrench), and install a 22-138 branch tap gauge adaptor into the branch pressure tap hole (Figure 10).
2. Measure the ambient temperature with an accurate thermometer. This temperature must be within the range of the thermostat.
3. Move the setpoint adjustment to the measured ambient temperature, using the internal setpoint indicator.
4. Taking care not to breathe on, or place the hand near the bimetal, use a 20-881 thermostat wrench (1/16” hex wrench) to turn the calibration screw until the branch line pressure indicates 9 psig. Clockwise rotation increases the branch line pressure. Counterclockwise rotation lowers the branch line pressure.
5. Reinstall the thermostat cover and set the thermostat to the desired setpoint.

Internal Stop Kit

Internal Stop Kit (Accessory)
The internal stop kit, model 20-712, consists of two screws and two nuts (Figure-10). Install this kit as follows:

1. Move the setpoint adjustment to one extreme limit.
2. Place a nut in the depression in the top plate and move the adjustment cam over the nut, to where the slot in the cam exposes the threads of the nut.
3. Thread a stop screw into the nut far enough to allow the stop to slide into the slot. Repeat on the other side.
4. Move the setpoint adjustment to the desired temperature, using the internal setpoint indicator.
5. Slide the stops to the desired limits and tighten both screws.

MAINTENANCE

1. The thermostat requires no maintenance.
2. Regular maintenance of the total system is recommended to assure sustained, optimum performance.

FIELD REPAIR
None. Replace an inoperative thermostat with a functional unit.

DIMENSIONAL DATA

Copyright 2006, TAC
All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice.

TAC
1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940.

www.tac.com.

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