t.a.c. TA-3432 Instruction manual

Printed in U.S.A. 9/08 ©Copyright 2008 TAC All Rights Reserved. F-11302-9
Application
Forlinevoltageon-offcontrolof mediatemperaturesin ducts,
tanks, liquid lines, pipes, etc.
Specifications
Setpoint Dial Range: See Tables 1 and 2.
Sensing Element: Helical bimetal.
Differential: See Tables 1 and 2.
Shipping Ambient Temperature Limits: -40 to 160°F (-40
to 71°C).
Electrical Switch: See Tables 1 and 2.
Connections: Coded terminals.
Cover: Beige painted steel case with 1/2" conduit opening.
Locations: NEMA Type 1 indoor only.
Mounting: In any position on any surface not subject to
excessive vibration. For immersion mounting AT-223 will is
required. Extension mounting bracket (provided) is required
by UL for duct installation of TA-3434 and TC-3413.
Dimensions:
Case, 5-3/8" high x 3-1/2" wide x 1-7/8" deep (136 mm x
89 mm x 48 mm).
Element, 1/2" diameter x 7-1/2" insertion length, overall
length 9-3/8" (131 mm x 191 mm x 238 mm).
ACCESSORIES
AT-223 Brass bulb well (see below)
Table-1 Specifications.
Part
Number Device Type
Functional
SetpointDial
Range
°F (°C)a
aUnits dual marked °F and °C.
Sensor
Ambient
°F (°C) Differential
°F (°C) Switch Type Voltage Full
Load
Amps
Locked
Rotor
Amps
Pilot
Duty
(VA)
Min. Max.
TA-3432 High temp.
manual reset 75 to 135 (23 to 57) -25 (-32) 235 (113) Fixed b
10 (5) SPST opens on temp. rise 120 16 96 720
240 8 48
TA-3433 High temp.
manual reset 100 to 160 (38 to 71) 0 (-18) 260 (127) Fixed b
5 (3) SPST opens on temp. rise 120 16 96 720
240 8 48
TA-3434 High temp.
manual reset 120 to 240 (49 to 116) 20 (-7) 300 (149) Fixed b
10 (5)
bReset cannot be accomplished until the sensed temperature is at least 5°F (3°C) below setpoint.
SPST opens on
temp. rise 120 16 96 720
240 8 48
TA-3441 Low temp.
manual reset 35 to 59 (1.7 to 15) -40 (-40) 159 (71) Fixed c
10 (5)
cReset cannot be accomplished until the sensed temperature is at least 5°F (3°C) above setpoint.
SPST opens on
temp. drop 120 16 96 720
240 8 48
TA-3432, TA-3433, TA-3434,
TA-3441, TC-3411, TC-3413
Duct and Immersion Electric Thermostats
General Instructions
Figure-1 Switch Action and Terminal Identification.

2©Copyright 2008 TAC All Rights Reserved. F-11302-9
AT-223 BRASS BULB WELL
Construction: Brass.
Connection: 3/4" MNPT.
Dimensions: 7-1/2" (191 mm) insertion length.
PRE-INSTALLATION
Inspection
Inspect the carton for damage. If damaged, notify the
appropriate carrier immediately. Inspect the device for
obvious damage. Return damaged products.
Required Installation Items
•Wiring diagrams
•Tools (not provided):
VOM (volt-ohm meter)
Appropriate screwdriver for mounting screws and
terminal connections
•Appropriate drill and drill bit for mounting screws
•Appropriate accessories
•Mounting screws:
(3) #8 x 3/4 sheet metal, provided with extension
mounting bracket with TA-3434 and TC-3413
(2) #8-32 x 3/8" round head, provided for all models
INSTALLATION
Caution:
1. Installer must be a qualified, experienced technician.
2. Make all connections in accordance with the wiring
diagram, and in accordance with national and local
electrical codes. Use copper conductors only.
3. Do not exceed ratings of the device.
Mounting
The thermostats may be mounted in any position. The
sensitive helical bimetal element may be mounted in ducts or,
with optional bulb well, in liquid lines, pipes, tanks, etc.
Duct Installation
1. Cut a 3/4" (19 mm) diameter hole in the duct where the
thermostat is to be located.
2. Remove the cover and carefully insert the bimetal in the
duct opening. Mark position for the two mounting screws
provided and punch or drill holes.
3. Partially insert screws.
4. Insert the bimetal element; rotate the thermostat housing
counterclockwise to engage screw heads in key hole
slots.
5. Straighten thermostat housing and tighten mounting
screws securely.
6. Make electrical connections and replace thermostat
cover.
Duct Installation with Extension Mounting
Bracket
See Figure 2.
Caution: Extension mounting bracket is required for duct
installation by UL on units where the control range exceeds
180°F (82°C) (typically TC-3413 and TA-3434).
1. Cut a 3/4" (19 mm) diameter hole in the duct where the
thermostat is to be located.
2. Use the extension bracket as a template to mark position
for three mounting holes.
3. Punch or drill holes for the extension bracket.
4. Securetheextensionbrackettotheductwiththethree(3)
#8 x 3/4" screws provided.
5. Partially thread the two #8-32 x 3/8" round head screws
provided into the extension bracket.
6. Remove the cover from the thermostat.
7. Insert the bimetal element into the hole in the duct; rotate
the thermostat housing counterclockwise to engage
screw heads in key hole slots.
Table-2 Specifications for Obsolete Models.
Part
Number Device Type
Functional
Setpoint
Dial Range
°F (°C)a
Sensor
Ambient
°F (°C) Differential
°F (°C) Switch Type Voltage Full
Load
Amps
Locked
Rotor
Amps
Pilot Duty
(VA)
Min. Max.
TC-3411bLow temp.
automatic
reset
0 to 120
(-18 to 49) -40 (-40) 220 (104)
Adj. 2 to 8 (1
to 4) Factory
set 2 (1) SPDT 120 3.8 22.8 125
240 1.9 11.4
TC-3413bHigh temp.
automatic
reset
120 to 240
(49 to 116) 20 (-7) 300 (149)
Adj. 2 to 8 (1
to 4) Factory
set 2 (1) SPDT 120 3.8 22.8 1254
240 1.9 11.4
aUnits dual marked °F and °C.
bTC-3411 and TC-3413 are not CSA certified.

F-11302-9 ©Copyright 2008 TAC All Rights Reserved. 3
8. Straighten thermostat housing and tighten mounting
screws securely.
9. Make electrical connections and replace thermostat
cover.
Figure-2 Duct Installation with Extension Mounting Bracket,
TA-3434 and TC-3413 Only.
Immersion Installation
1. The AT-223 bulb well (purchased separately) positions the
thermostat mechanism housing 2" (51 mm) away from
pipe or tank wall to allow for insulation.
2. Insert the bulb well in pipe line or tank where it will be
exposed to a representative temperature of the medium
being controlled. The bulb well is furnished with a
mounting bushing threaded for standard 3/4" pipe fittings.
3. Remove cover, using care when handling bimetal
element, and insert element in bulb well.
4. Note that cutout of mounting flange on bulb well must be
at the top. This cutout allows clearance for scale setting
lock screw. Insert mounting screws provided through
keyhole slot in thermostat housing to engage
corresponding holes in bulb well mounting flange. Align
thermostat and tighten mounting screws securely.
5. Make electrical connections and replace thermostat
cover.
WIRING
Terminals are located under thermostat cover. Knockouts for
1/2" conduit connectors at top of case.
See Figure 1 for switch action and terminal identification.
ADJUSTMENTS
See Figure 3.
Setpoint
The lever setting determines the setpoint of the thermostat.
The lever can be locked in place by tightening the dial setting
lock screw to prevent unauthorized resetting of thermostat
control point.
Differential
To increasethe differential,bend theswitch actuatingcam up,
using a narrow screwdriver. A 1/32" (1 mm) upward bend at
the leftend ofthecamincreasesthe differential approximately
2°F (1°C).
CHECKOUT
While media temperature is in the scale range of unit,
determine the media temperature, then move the scale slider
above and below the media setting and verify internal switch
action using a VOM.
CALIBRATION
The thermostats are factory calibrated and should not require
furtherattention.However,ifathermostatrequirescalibration,
proceed as follows:
1. Set the temperature lever to correspond to actual
temperature of medium being controlled. Use and
accurate thermometer and allow both thermometer and
thermostat to settle out for approximately ten minutes.
2. Turn off power tothermostat andthen remove thermostat
cover.
3. Insert a narrow blade screwdriver from upper left-hand
corner and turn calibrating screw clockwise to lower
control point temperature, and counterclockwise to raise
control point temperature. Turn the calibrating screw
either to the right or to the left (clockwise or
counterclockwise) as required until the switch clicks.
4. Rotate the calibrating screw inthe opposite direction until
the switch clicks again.
5. Setcalibratingscrewhalfwaybetweenpointwhereswitch
clicks [one full turn of calibrating screw represents
approximately 10°F (6°C)].
6. Re-install all electrical connections and replace
thermostat cover.

4©Copyright 2008 TAC All Rights Reserved. F-11302-9
MAINTENANCE
Regular maintenance of the total system is recommended to
assure sustained optimum performance.
FIELD REPAIR
Do not field repair the thermostat. If the system is not
operating correctly and the reason is traced to the thermostat,
it should be replaced.

F-11302-9 ©Copyright 2008 TAC All Rights Reserved. 5

6©Copyright 2008 TAC All Rights Reserved. F-11302-9

F-11302-9 ©Copyright 2008 TAC All Rights Reserved 7

Copyright 2008, TAC
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trademarks are the property of their respective
owners. Information contained within this
document is subject to change without notice.
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TAC
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P.O. Box 2940
Loves Park, IL 61132-2940