Page 1
Application
The 2212-41x Series Pneumatic Room Thermostats
are designed for proportional control of pneumatic
devices and actuators in environmental control
systems. These two-pipe thermostats incorporate a
highly sensitive bimetal thermostatic element and a
pilot operated relay with pneumatic feedback for
accuracy and stabilit y ove r 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.
2212-1xx Series
2212-30x Series
Pneumatic Room Thermostats
General Instructions
Full Dial Cover Shown
(Covers must be ordered
separa t el y ex c ep t as no ted . )
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.
SPECIFICATIONS
Action: Proportional.
Setpoint Range: 55 to 85 °F (13 to 29 °C), except as noted
in model chart (Table-1).
Throttling Range: 2 to 12 °F, adjustable.
Supply Air Pressure: 20 psig.
Maximum Air Pressure: 30psig.
Main Air Consumption: 15 scim.
Calibr a ti o n P o int: 9 psig branch line pressure when
ambient equals set point (factory-set).
Setpoint Adjustment: Ser rated thumbwheel.
Construction:
Mechanical Components, Di e cast al umin um, stai nless
steel, and glass-filled nylon.
Diaphragm, Fabric-reinforced Neoprene .
Air Lines, Connect to ther m ostat nipples with
spring-reinforced plastic tubes.
Branch Connections, Equipped with internal fiters.
Environment
Humidity: 5 to 95% relative humidity, non-condensin g.
Locations: NEMA Type 1.
Printed in U.S.A. 8/08 Copyright 2008 TAC All Rights Reserved. F-24575-3
Page 2
ORDERING DATA
Table-1 Model Chart — Thermostats.
Wholesale
Number
2212-118 T18-301
2212-128
2212-301
2212-302
2212-119 T19-301
2212-129
2212-303
2212-304
a
These models include factory-installed 20-712 dial stop kits.
b
Temperature range, 35 to 65 °F.
c
Temperature range, 75 to 105 °F.
Replaces
a
T18-3011
b
c
a
T19-3011
b
c
Model
T18-305
T18-306
T19-305
T19-306
Action Description
Direct
Includes (2) 1/4" x 3/16"
barbed couplings, 20-693
tubing, 20-714 wall plate,
20-711 mounting plate , and
mounting screws.
Reverse
Table-2 Model Chart — Thermostat Replacement Kits.
Wholesale
Number
2212-418 T18-301 Direct
2212-419 T19-301 Reverse
Replaces
Model
Action Description
Includes thermostat, 20-714
wall plate, 20 -042 mounting
plate, mounting screws,
20-693 tubing and 2890-011
convertible cover.
Table-3 Model Chart — Uni-Kits®.
Wholesale
Number
2212-518
2212-519
2212-618 T18-301 Direct
2212-619 T19-301 Reverse
a
These models include factory-installed 20-712 dial stop kits.
Replaces
Model
a
T18-3011 Direct
a
T19-3011 Reverse
Action Description
Includes thermostat with
stops, 21-933 full dial cover
with bl ank cover conversion,
and 22-022 conver sion kit.
Includes thermostat, 22-1033
full dial cover with blank cover
conversion, and 22-023
conversion kit.
Table-4 Covers.
Wholesale
Number
21-923 C1-42
22-923 C1-46
22-1023 C1-48 Euro-white 10 to 30 °C
a
21-928
a
22-928
a
22-1028
21-933 C3-42
22-933 C3-46
22-1033 C3-48 Euro-white 10 to 30 °C
a
21-939
a
22-939
a
22-1039
21-943 C5-42
22-943 C5-46
22-1043 C5-48 Euro-white
21-948 C6-42
22-948 C6-46
22-1048 C6-48 Euro-white
Replaces
Model
Color Material
Satin Chrome
Markings
Metal
55 to 85 °F
Plastic22-823 C1-47 Beige
C2-42
C2-46
Satin Chrome
C2-47 Beige
a
C2-48 Euro-white
Satin Chrome
Metal
Plastic22-828
Metal
55 to 85 °F
Plastic22-833 C3-47 Beige
C4-42
C4-46
Satin Chrome
C4-47 Beige
a
C4-48 Euro-white 10 to 30 °C
Satin Chrome
Metal
55 to 85 °F
Plastic22-839
Metal
Plastic22-843 C5-47 Beige
Cooler - Warmer Yes No
Satin Chrome
Metal
Plastic22-848 C6-47 Beige
Dial
Setpoint
Adjustment
Yes
Blank Concealed
Yes
Concealed
Thermometer
No
Yes
(External)
2 Copyright 2008 TAC All Rights Reserved. F-24575-3
Page 3
Table-4 Covers. (Continued)
Wholesale
Number
a
21-957
a
22-957
a
22-1057
a
21-960
a
22-960
a
22-1060
2890-010
2890-011
2890-013
a
Thermostat covers with concealed setpoint adjustment, and thermostat cover kits inlude setpoint adjustment cover 21-800 (black) or 21-801 (Euro-white).
Replaces
Model
C11-42
C11-46
C11-47 Beige
a
a
a
a
a
a
C11-48 Euro-white
C14-42
C14-46
C14-47 Beige
C14-48 Euro-white
Kit
Kit
Kit Beige
Kit Euro-wh it e 10 to 30 °C or Blank
Color Material
Satin Chrome
Satin Chrome
Satin Chrome
Metal
Plastic22-857
Metal
Plastic22-860
Metal
Plastic2890-012
Dial
Markings
None Concealed
Blank Concealed
55 to 85 °F
or Blank
Setpoint
Adjustment
Yes
or
Concealed
Thermometer
(External)
(Internal)
Yes
Yes
No
Table-5 Accessories.
Wholesale
Number
20-695 10-15 Aspirating box, satin finish
20-707 10-53 Metal thermostat guard
20-712 10-59 Internal stop k it
20-715 10-62 Clear c over thermostat gu ard
20-850 — Thermostat mounting plate
20-881 N2-4 Thermo stat cali br a tio n wrenc h
21-473 10-73 Drywall mounting bracket
21-800 10-72 Setpoint adju stment cover (black)
21-801 10-81-48 Setpoi nt adjustment cover (Euro-white)
21-876 10-76 Opaque c over thermostat gu ard
22-022 — Thermostat conversion kit
22-023 — Thermostat conversion kit
22-138 MCS-GA Branch tap ga uge adaptor
900-002 — Thermostat calibration kit
Replaces
Model
Description
TYPICAL APPLICATIONS
(Piping Diagram)
2212-1XX or
2212-30X Series
Thermostat
M B
To Final Control
Device
M
20 psig
Main Air
Figure-1 Typical Application.
INSTALLATION
Inspection
Inspect the package for damage. If damaged, notify the
appropriate carrier immediately. If undamaged, open the
package and inspect th e device for obvious damage. Return
damaged products.
Requirements
• Tools (not provided):
– Appropriat e screwdriver for mou nting the thermostat
– 20-881 Thermostat calibration and cover screw
wrench (or 1/16” and 1/4” hex wr enches)
• Training: Inst aller 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 wi ll affect the accuracy of the
thermostat.
• Avoid install ing the th ermostat on ou tside wall s. If su ch a
location is necessary, mount the thermostat on an
insulated back plate (accessory it em ).
• Mount thermostats
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.
only after the wall surfaces have
F-24575-3 Copyright 2008 TAC All Rights Reserve d. 3
Page 4
Mounting
y
Standard M ounting Options
1. Mount the thermostat according to the applicable figure
(Figure-2 throu gh Figure-9) . See Figure-11 for mount ing
dimensions.
1/4 x 3/16 in. Barbed Couplings
21-611
for Plastic Tubing
(included with thermostat)
20-693
6 in. Tube Assembly
with Eyelets
(included with
thermostat)
Cover
(order separately)
¡
F
¡
1
C
2
6
5
2
2
Mounting Screws
(included with thermostat)
20-714
Wall Plate
(included with
thermostat)
Thermostat
Polyethylene
Tubing Air Supply
Branch
Main
21-473
Drywall Mounting
(order separately)
20-693
Bracket
6 in. Tube Assembly with Eyelets
(included with thermostat)
Thermostat
¡
F
¡
1
C
2
6
5
2
2
Wall Plate
Mounting Screws
Cover
(order separately)
(included with thermostat)
Figure-4 Thermost at Mounted with 22-022
Conversion Kit, Using Wall Plate and Skirt, to
Replace Competitive Thermostats.
Polyeth ylene Tubing
Air Supply
Main
Branch
Skirt
Figure-2 Flush Mount ing of Thermostat,
Using Drywall Mounting Bracket.
Cover
20-693
¡
F
¡
1
C
2
6
5
2
2
)
(2) #6 Self-Tapping
6 in. Tube Assembly with Eyelets
(included with thermostat)
Thermostat
(order separatel
Polyeth ylene Tubing
Air Supply
Pre-plumbed
Electrical Box
Wall
20-850 Plate
(2) Screws for Electrical
Box Mounting
Screws
Branch
Main
6 in. Tube Assembly with Eyelets
20-693
(included with thermostat)
Thermostat
¡
F
¡
1
C
2
6
5
2
2
Mounting Screws
Cover
(order separately)
(included with thermostat)
Figure-5 Thermost at Mounted with 22-022
Conversion Kit, Usi ng Wa ll Plate Only, to
Replace Competitive Thermostats.
Polyeth ylene Tubing
Air Supply
Branch
Bracket
Wall Plate
Main
Figure-3 Flush Moun ti ng of Thermostat, Using 20- 850 Plate
and Pre-Plumbed Electri cal Box.
4 Copyright 2008 TAC All Rights Reserved. F-24575-3
Page 5
Air Supply Tubing
Branch
Main
Wall Plate
Pre-plumbed
Electrical Box
(optional)
2
3/16 in. Tygothane
Tubing with Eyelets
(included with thermostat)
Wall
Thermostat
1
¡
F
¡
1
C
2
6
5
2
2
3/16 in. x 1/4 in.
Barbed Coupling
(included with thermostat)
2
Insert
(2) #6 x 1 in.
2 4
Mounting Screws
Cover
1
(2) Thermostat
(for electrical box mounting)
Mounting Screws
(included with thermostat)
3
1 The pneumatic thermostat replacement kits 2212-618 and
2212-619 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 Thermosta t Mounted with 22-023 Thermosta t
Conversion Kit.
Polyethylene
Tubing Air Supply
1/4 x 3/16 in. Barbed Coupling
21-611
for Plastic Tubing
(included with thermostat)
20-693
6 in. Tube Assembly
with Eyelets
(included with
thermostat)
¡
F
¡
1
C
2
6
5
2
2
20-714
Wall Plate
(included with
thermostat)
Polyethylene
Tubing
Thermostat
Branch
Wall
20-042
Mounting
Plate
(2) Screws for
Mounting Plate
Main
Remove Locator
and Adaptor
20-714
Wall Plate
(included with
thermostat)
Thermostat
¡F
¡C
1
2
6
5
2
2
Cover
(order separately)
Figure-8 Thermostat Ins tal lation Using
Pipehead in Masonry Wall .
20-716
Insulating Back Plate
(order separately)
20-693
6 in. Tube Assembly
with Eyelets
(included with
thermostat)
¡
F
¡
1
C
2
6
5
2
2
Cover
(order separately)
Figure-9 Surface Mounting of Thermostat,
Block
Mortar Joint Fitting
(order separately)
20-693
6 in. Tube Assembly with Eyelets
(included with thermostat)
Mounting Screws
(included with thermostat)
20-689
Mounting Fitting with
8 ft. Copper Lines
(order separately)
Cutouts
(partially formed
on underside)
Mounting Ring and
Flathead Screws
(order separately)
Thermostat
Mounting Screws
(included with thermostat)
Pipehead Application.
Polyethylene
Tubing
Air Supply
Branch
Main
20-710
Polyethylene
Tubing
Air Supply
Branch
20-642
Main
Mounting Screws
(included with thermostat)
2890-011
Convertible Cover
Figure-7 Thermostat Mounted with
2212-400 Series Kit.
F-24575-3 Copyright 2008 TAC All Rights Reserve d. 5
Page 6
Optional Mounting
Eliminate the pipe head fitting by usi ng the 22-022 therm ostat
conversion ki t and the included instru ctions, plus the
following:
1/4" Plastic Air Lines: Inst all th e 1/4" barbed c ouplings i nto
the air lines. Connect the tube assembly to the 3/16" end of
these couplings.
1/4" Copper Air Lines: Solder the bar bed couplings into the
copper lines. The tube assembly can then be conne cted to
the 3/16" end of the couplings.
CALIBRATION
Setpoint Adjustment
Internal Setpoint
Indicator
Limit Stops (2)
(Accessory)
Fahrenheit
Scale
T R
˚F ˚C
12
6
2
Cover Scale
Setpont Indicator
H
5
2
Branch
Pressure
Tap
Celsius
Scale
Calibration
Screw
Calibr atio n a nd Th ro ttlin g Ra ng e Setting
The 2212 series thermostats are factory calibrated and are
shipped with the thrott ling ra nge 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 temperatur e wit h an accurate
thermometer. This tempera ture
of the thermostat
.
3. Move the setpoint adjustment to t he me asured ambient
temperature, using the internal setpoint indicator .
4. Taking care not to breathe on , or pla ce the hand near t he
bimetal, use a 20-881 thermostat wrench (1/ 16” hex
wrench) to turn the calibratio n screw until the branch line
pressure indicates 9psig. Clockwise rotation increases
the branch line pressure. Counterclo ckwise rotation
lowers the branch line pressure.
5. Reinstall the thermostat cover and set the thermostat to
the desired set point.
must be withi n the range
Thermostatic
Bimetal
Figure-10 Thermostat Calibration Features
and Limit Stop Acces sory.
MAINTENANCE
The thermostat requires no maintenance.
Regular mainten ance of the t otal sys tem is reco mmended to
assure sustained, optimum performance.
FIELD REPAIR
None. Replace an inoperative thermostat with a functional
unit.
DIMENSIONAL DATA
1/8
(.318)
MB
Internal Stop Kit (Accessory)
The internal stop ki t, model 20-712, consists of two screws
2-1/32
(5.16)
and two nuts (Figure-10). Install this kit as follows:
1. Move the setpoint adjustment to one extreme l imit.
2. Place a nut in the depression in the top plate and move
the adjustmen t cam over th e nut, t o where t he s lot in t he
1-1/4
(3.18)
1-3/8
(3.5)
1-3/8
(3.5)
2-1/32
(5.16)
cam exposes the threads of the nut.
3. Thread a stop screw into the nut far enough to allow the
stop to slide in the slot. Repeat on the other side.
Dimensions are in inches (mm).
Figure-11 Mounting Dimensions.
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.
F-24575-3 Copyright 2008 TAC All Rights Reserve d. 6
Page 7
F-24575-3 Copyright 2008 TAC All Rights Reserved 7
Page 8
Copyright 2008, 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.
F-24575-3
TAC
1354 Clifford Avenue
P.O. Box 2940
Loves Park, IL 61132-2940
www.tac.com
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