t.a.c. 2214 Series Instruction manual

Printed in U.S.A. 8/08 ©Copyright 2008 TAC All Rights Reserved. F-24577-3
Application
The 2214 Series Pneumatic Room Thermostats are
designed for applications requiring separate control
points due to varying occupancy or seasonal loads.
They are particularly well suited to day/night control in
buildings such as schools and hospitals.
These thermostats have a serrated thumb wheel for
setpoint adjustment. They utilize dual bimetals and are
available inboth direct and reverse acting models. One
temperature (day) is controlled when the main
pressure is 15 to 17 psig, and the other temperature
(night) is controlled when the main pressure is 21 to
25 psig. Both control points are adjustable and either
may be set to control higher or lower than the other,
using a ball feedback system and a 2:1 relay.
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.
•Separate factory-calibrated night bimetal and
setpoint dial, with fixed 4 °F night throttling range for
accurate “night” operation.
•Snap-acting (not gradual) changeover from “day” to
“night” operation and vice versa.
•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:
Day, 55 to 85 °F (13 to 29 °C)
Night, 50 to 80 °F (10 to 27 °C).
Throttling Range:
Day, Adjustable 2 to 12 °F
Night, Adjustable 3 to 5 °F.
Supply Air Pressure:
Below 17 psig, Operates at day setpoint.
Above 21 psig, Operates at night setpoint.
Maximum Air Pressure: 30 psig.
Main Air Consumption: 30 scim at 16 psig; 43 scim at
25 psig.
Calibration Point: 9 psig branch line pressure when
ambient equals setpoint (factory-set).
Day/Night Indexing: Remote, by change in main air
pressure.
Setpoint Adjustment: Serrated thumbwheel.
Construction:
Mechanical Components, Die cast aluminum, 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 fiters.
Environment
Humidity: 5 to 95% relative humidity, non-condensing.
Locations: NEMA Type 1.
2214 Series
Day/Night Pneumatic Room Thermostats
General Instructions
Full Dial Cover Shown
(Covers must be ordered
separately except as noted.)

2©Copyright 2008 TAC All Rights Reserved. F-24577-3
ORDERING DATA
Table-1 Model Chart — Thermostats.
Wholesale
Number Replaces Model Day/Night Action Description
2214-121 T23-301 Direct/
Direct Includes (2) 1/4" x 3/16"
tubing reducers, 20-693
tubing, 20-714 wall plate,
20-711 mounting plate, and
mounting screws.
2214-131a
aThese models include factory-installed 20-712 dial stop kits.
T23-3011
2214-122 T24-301 Reverse/
Reverse
2214-132aT24-132
Table-2 Model Chart — TAC Uni-Kits®.
Wholesale
Number Replaces Model Action Description
2214-521aT23-3011 Direct/
Direct
Includes thermostat with
stops, 21-933 full dial cover
with blank cover conversion,
and 22-022 conversion kit.
2214-522aT24-3011
2214-621 T23-301 Reverse/
Reverse
Includes thermostat, 22-1033
full dial cover with blank cover
conversion, and 22-023
conversion kit.
2214-622 T24-301
aThese models include factory-installed 20-712 dial stop kits.
Table-3 Covers.
Wholesale
Number Replaces Model Color Material Dial
Markings Setpoint Adjustment Thermometer
21-923 C1-42 Satin Chrome Metal
55 to 85 °F Yes
No
22-923 C1-46
Plastic22-823 C1-47 Beige
22-1023 C1-48 Euro-white 10 to 30 °C
21-928aC2-42 Satin Chrome Metal
Blank Concealed
22-928aC2-46
Plastic22-828aC2-47 Beige
22-1028aC2-48 Euro-white
21-933 C3-42 Satin Chrome Metal
55 to 85 °F Yes
Yes
(External)
22-933 C3-46
Plastic22-833 C3-47 Beige
22-1033 C3-48 Euro-white 10 to 30 °C
21-939aC4-42 Satin Chrome Metal
55 to 85 °F Concealed 22-939aC4-46
Plastic22-839aC4-47 Beige
22-1039aC4-48 Euro-white 10 to 30 °C
21-943 C5-42 Satin Chrome Metal
Cooler - Warmer Yes No
22-943 C5-46
Plastic22-843 C5-47 Beige
22-1043 C5-48 Euro-white
21-948 C6-42 Satin Chrome Metal
22-948 C6-46
Plastic22-848 C6-47 Beige
22-1048 C6-48 Euro-white
21-957aC11-42 Satin Chrome Metal
None Concealed Yes
(External)
22-957aC11-46
Plastic22-857aC11-47 Beige
22-1057aC11-48 Euro-white
21-960aC14-42 Satin Chrome Metal
Blank Concealed Yes
(Internal)
22-960aC14-46
Plastic22-860aC14-47 Beige
22-1060aC14-48 Euro-white
2890-010aKit Satin Chrome Metal 55 to 85 °F
or Blank Yes
or
Concealed No
2890-011aKit
Plastic2890-012aKit Beige
2890-013aKit Euro-white 10 to 30 °C or Blank
aThermostat covers with concealed setpoint adjustment, and thermostat cover kits inlude setpoint adjustment cover 21-800 (black) or 21-801 (Euro-white).

F-24577-3 ©Copyright 2008 TAC All Rights Reserved. 3
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
Table-4 Accessories.
Wholesale
Number Replaces Model Description
20-676 10-18 Aspirating box, stainless steel
20-695 10-15 Aspirating box, satin finish
20-707 10-53 Metal thermostat guard
20-712 10-59 Internal stop kit
20-715 10-62 Clear cover thermostat guard
20-850 — Thermostat mounting plate
20-881 N2-4 Thermostat calibration wrench
21-473 10-73 Drywall mounting bracket
21-800 10-72 Setpoint adjustment cover (black)
21-801 10-81-48 Setpoint adjustment cover (Euro-white)
21-876 10-76 Opaque cover thermostat guard
22-022 — Thermostat conversion kit
22-023 — Thermostat conversion kit
22-138 MCS-GA Branch tap gauge adaptor
900-002 — Thermostat calibration kit
M
16 psig Day
25 psig Night
Main Air
MB
2214 Series
Thermostat
Controlled
Device
Figure-1 Typical Application.
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.
•Avoidinstalling the thermostat on outsidewalls.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
1. Mount the thermostat according to the applicable figure
(Figure-2 through Figure-8).See Figure-10 for mounting
dimensions.
¡F¡C
5
2
12
6
2
BranchMain
Polyethylene
Tubing Air Supply
20-714
Wall Plate
(included with
thermostat)
21-473
Drywall Mounting
(order separately)
20-693
6 in. Tube Assembly
with Eyelets
(included with
thermostat)
Thermostat
Mounting Screws
(included with thermostat)
Cover
(order separately)
21-611
1/4 x 3/16 in. Barbed Coupling
for Plastic Tubing
(included with thermostat)
Figure-2 Flush Mounting of Thermostat,
Using Drywall Mounting Bracket.

4©Copyright 2008 TAC All Rights Reserved. F-24577-3
(2) #6 Self-Tapping
Screws
20-693
6 in. Tube Assembly with Eyelets
(included with thermostat)
20-850 Plate
Thermostat
Cover
(order separately)
¡F¡C
5
2
12
6
2
(2) Screws for Electrical
Box Mounting
Pre-plumbed
Electrical Box
Wall
Polyethylene Tubing
Air Supply
Branch Main
Figure-3 Flush Mounting of Thermostat, Using 20-850 Plate
and Pre-Plumbed Electrical Box.
Bracket
Mounting Screws
(included with thermostat)
20-693
6 in. Tube Assembly with Eyelets
(included with thermostat)
Skirt
Wall Plate
Thermostat
Cover
(order separately)
¡F¡C
5
2
12
6
2
Polyethylene Tubing
Air Supply
Branch Main
Figure-4 Thermostat Mounted with 22-022
Conversion Kit, Using Wall Plate and Skirt, to
Replace Competitive Thermostats.
Bracket
20-693
6 in. Tube Assembly with Eyelets
(included with thermostat)
Wall Plate
Thermostat
Cover
(order separately)
Mounting Screws
(included with thermostat)
¡F¡C
5
2
12
6
2
Polyethylene Tubing
Air Supply
Branch Main
Figure-5 Thermostat Mounted with 22-022
Conversion Kit, Using Wall Plate Only, to
Replace Competitive Thermostats.
Wall
¡F¡C
5
2
12
6
2
Main
Wall Plate
Pre-plumbed
Electrical Box
(optional)
Air Supply Tubing
Branch
(2) Thermostat
Mounting Screws
(included with thermostat)
3/16 in. Tygothane
Tubing with Eyelets
(included with thermostat)
Thermostat
Cover
(2) #6 x 1 in.
Mounting Screws
(for electrical box mounting)
Insert
1 The pneumatic thermostat replacement kits 2214-621 and
2214-622 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.
1
3
2
22 4
1
3/16 in. x 1/4 in.
Barbed Coupling
(included with thermostat)
Figure-6 Thermostat Mounted with 22-023 Thermostat
Conversion Kit.

F-24577-3 ©Copyright 2008 TAC All Rights Reserved. 5
Optional Mounting
Eliminate the pipehead 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 couplings into
the air lines. Connect the tube assembly to the 3/16" end of
these couplings.
1/4" Copper Air Lines: Solderthebarbedcouplingsintothe
copper lines. The tube assembly can then be connected to
the 3/16" end of the couplings.
¡F ¡C
5
2
12
6
2
Block Branch
Main
Polyethylene
Tubing
Air Supply
Remove Locator
and Adaptor
20-710
Mortar Joint Fitting
(order separately)
20-693
6 in. Tube Assembly with Eyelets
(included with thermostat)
Thermostat
Cover
(order separately) Mounting Screws
(included with thermostat)
20-714
Wall Plate
(included with
thermostat)
Figure-7 Thermostat Installation Using
Pipehead in Masonry Wall.
¡F¡C
5
2
12
6
2
Branch Main
Polyethylene
Tubing
Air Supply
Cutouts
(partially formed
on underside)
20-689
Mounting Fitting with
8 ft. Copper Lines
(order separately)
20-716
Insulating Back Plate
(order separately)
20-693
6 in. Tube Assembly
with Eyelets
(included with
thermostat)
Cover
(order separately)
20-642
Mounting Ring and
Flathead Screws
(order separately)
Thermostat
Mounting Screws
(included with thermostat)
Figure-8 Surface Mounting of Thermostat,
Pipehead Application.
CALIBRATION
The 2214 series thermostats are factory calibrated with day
sensor throttling range set at 3 °F. They should not require
calibration upon installation. However, if it is necessary,
changethethrottlingrange,calibration, orswitchpointsetting
as follows:
1. Remove the thermostat cover and install a 22-138 branch
tap gauge adaptor into the branch pressure tap hole
(Figure-9).
2. Measure the ambient temperature with an accurate
thermometer. This temperature
must be within the range
of the thermostat
. Take care not to breathe on, or place
a hand near the bimetals, as this will result in an
inaccurate reading.
Day Setpoint Calibration
1. Position the day setpoint cam (Figure-9) to match the
ambient temperature.
2. Set the main air pressure to 15 psig and adjust the day
calibrating screw using a 20-881 thermostat wrench
(1/16” hex wrench) until the branch tap gauge reads
9 ± 1 psig. Clockwise rotation increases the branch line
pressure. Counterclockwise rotation lowers the branch
line pressure.
Night Setpoint Calibration
1. Increase the main line pressure to 25 psig.
2. Using a 20-881 thermostat wrench (1/16” hex wrench) in
the night setpoint screw (Figure-9), position the night
setpoint dial to match the ambient temperature.
3. Firmly hold the night setpoint dial with your fingers and
adjust the night calibrating screw until the branch tap
gauge reads 9 ± 1 psig.
4. Release the dial and allow it to rotate with the night
calibrating screw to the desired night control point.
˚F ˚C
5
2
12
6
2
T R
H
Day Setpoint
Branch
Pressure
Tap
Setpoint Adjustment
Day Calibration
Screw
Cover Scale
Setpont Indicator
Celsius
Scale
Fahrenheit
Scale
Limit Stops (2)
(Accessory)
Night Calibration and
Setpoint Screw Night Setpoint Dial
Day Bimetals
Day Throttling
Range
Adjustment
Night Bimetal
Switching
Screw
Figure-9 Thermostat Calibration Features
and Limit Stop Accessory.

6©Copyright 2008 TAC All Rights Reserved. F-24577-3
Switching Adjustment
The 2214 series thermostats are factory calibrated to switch
from day to night action at a pressure between 17 and
21 psig. If necessary, adjust the switch point as follows:
Note:
•The switch point adjustment should be made on a test
bench at which a variable main air supply is available.
•It is necessary to read the branch line pressure while
making the switch point adjustment.
1. Set the main air supply to the thermostat to the desired
switch over point. For example, if system pressure is
13 psig day and 18 psig night, the desired switch over
point would be between 15 and 16 psig.
2. Position the day and night setpoints according to
Table-5.
3. Verify that the branch line pressure gauge or branch
pressure tap reads approximately the main air pressure
being fed to the thermostat. If not, recheck the day
setpoint calibration.
4. To lower the switch over point, use a 20-881 thermostat
wrench (1/16” hex wrench) to turn the switching screw
clockwise, 1/8 turn at a time, until the branch line
pressure falls. To raise the switch over point, turn the
switching screw counterclockwise in the same manner.
Caution: Do not force the calibrating screws. If the desired
action is not obtained when the screws are rotated, check to
be sure the direction of rotation is correct.
5. Lower the main air pressure to the desired system day
pressure and observe the branch line pressure. The
branch line pressure should rise to approximately the
main air pressure.
6. Raise the main air pressure to the night setting and
observe the thermostat for proper function. As the main
air pressure rises past the switch over point, the branch
line pressure should drop off to zero. Lower the main air
pressure and verify that the branch line pressure rises
from zero as the main air pressure drops below the
switch over point.
7. Reinstall the thermostat cover and recheck the
calibration at both day and night settings.
Table-5 Day and Night Setpoints.
Thermostat Model Day Night
2214-121, 2214-131, 2214-521, 2214-621 55 °F 80 °F
2214-122, 2214-132, 2214-522, 2214-622 85 °F 50 °F
Internal Stop Kit (Accessory)
The internal stop kit, model 20-712, consists of two screws
and two nuts (Figure-9). 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 overthenut, 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 in 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
The thermostat requires no maintenance.
Regular maintenance of the totalsystem is recommended to
assure sustained, optimum performance.
FIELD REPAIR
None. Replace an inoperative thermostat with a functional
unit.
DIMENSIONAL DATA
1-1/4
(3.18) 1-3/8
(3.5)
1/8
(.318)
1-3/8
(3.5) 2-1/32
(5.16)
2-1/32
(5.16)
MB
Dimensions are in inches (mm).
Figure-10 Mounting Dimensions.

F-24577-3 ©Copyright 2008 TAC All Rights Reserved. 7

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-24577-3
TAC
1354 Clifford Avenue
P.O. Box 2940
Loves Park, IL 61132-2940
www.tac.com