TK-6024, TK-6124, TK-8024,
TK-8124
Pneumatic Bulb Thermostats
General Instructions
For proportional temperature control of pneumatic valves and actuators to maintain air or liquid temperatures in duct, plenum chambers, liquid lines, tanks, etc. May also be used as a low limit thermostat.
Thermostat: Proportional two pipe type. Thermostats are ambient compensated.
Sensing Element: Remote liquid-filled copper.
Control Dial Range: -20 to 240°F (-29 to 115°C). Shipped as -20 to 120°F, reverse side of dial 100 to 240°F. Throttling Range: Adjustable 3 to 35°F/10 psi (2 to 19°C/69 kPa) change in output, factory set at 5°F (3°C).
Output Air Signal: 0.5 psig (3.4 kPa) to supply air pressure -0.5 (-3.4 kPa).
Action: See Table 1.
Ambient Limits:
Shipping, -40 to 150°F (-40 to 65°C). 0 to 98% R.H., non-condensing.
Case Operating, 40 to 150°F (4 to 65°C). 10 to 98% R.H., non-condensing.
Bulb, 310°F (154°C) maximum.
Supply Air Pressure: Clean, oil free, dry air required (reference EN-123).
Nominal, 20 psig (138 kPa). Minimum, 15 psig (103 kPa). Maximum, 30 psig (207 kPa).
Air Connections: 1/8" FNPT for main, branches and AL-362 gauges (not included).
Air Consumption for Sizing Air compressor: 0.008 scfm (3.8 ml/s).
Air Capacity for Sizing Air Mains: 16 scim (4.4 ml/s).
Mounting: Upright position on a wall or vertical flat surface.
Bulb Dimensions: See Table 1. Capillary Length: 6’ (1.8 m).
Case Dimensions: 5-13/16" high x 6-3/16" wide x 4" deep (148 mm x 157 mm x 102 mm).
ACCESSORIES |
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AL-362 |
Stem mounted back connected 0-30 psi gauge |
AT-201 |
3/8" x 9-1/2" with 3/4" MNPT copper bulb well |
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requires AT-209 |
AT-203 |
3/8" x 9-1/2" with 3/4" MNPT stainless steel bulb |
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well requires AT-209 |
AT-206 |
3/8" x 4-1/2" with 1/2" MNPT copper bulb well |
AT-208 |
Duct mounting kit |
AT-209 |
Liquid line or tank mounting kit |
AT-211 |
Bulb shield |
AT-539 |
Pilot pressure kit |
TOOL-95 |
Pneumatic calibration tool kit (required for use |
|
as low limit thermostat) |
AT-520-011 |
Relay repair kit |
AT-528 |
Pilot restrictor kit |
DYDK-77-031 |
Thermal element for TK-8X24 |
DYDK-99-011 |
Thermal element for TK-6X24 |
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Bulb |
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Part Number |
Action |
Style |
Dimensions |
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in (mm) |
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TK-6024 |
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Straight |
3/8 x 4-5/8 |
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DAa |
(9.5 x 117) |
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TK-8024 |
Averaging |
3/32 x 8’ |
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(2.4 x 2.4 m) |
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TK-6124 |
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Straight |
3/8 x 4-5/8 |
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RAa |
(9.5 x 117) |
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TK-8124 |
Averaging |
3/32 x 8’ |
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(2.4 x 2.4 m) |
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aDirect Acting (DA) - increase output pressure on temperature rise. Reverse Acting (RA) - Decrease output pressure on temperature rise.
Printed in U.S.A. 12/09 |
© Copyright 2009 Schneider Electric All Rights Reserved. |
F-14684-5 |
Visually inspect the carton for damage. If damaged, notify the appropriate carrier immediately. Visually inspect the device for obvious defects. Return damaged or defective products.
•Tools (not provided):
Appropriate drill, drill bits and screwdriver for mounting screws
Needle nose pliers or 3/16" open-ended wrench to hold dial shaft
•Appropriate Accessories
•Mounting screws and appropriate fittings (not provided)
Caution: Installer must be a qualified, experienced technician.
Make all connections in accordance with the job piping diagrams, local and national codes.
Avoid locations near steam or hot water coils or pipes, or wherever radiant heat will affect the bulb or capillary tube.
Mount the thermostat in an upright position on a wall or vertical flat surface that does not vibrate.
Three (3) mounting holes 3/16" (5 mm) provided on case.
Part Number |
Description |
Mt. Fitting |
Insertion |
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Size |
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AT-201a |
Copper bulb well |
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1/2" dia. |
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AT-203a |
Stainless steel bulb |
3/4" MNPT |
OD (9-1/2” |
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well |
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long |
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1/2" dia. |
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AT-206 |
Copper bulb well |
1/2" MNPT |
OD 4-1/2" |
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long |
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AT-209b |
Bulb mounting kit |
3/4" MNPT |
Length of |
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bulb |
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aRequires AT-208.
bRecommended installation is with a bulb well.
Table-3 Application Limitations at 250°F Fluid Temp.
(Max. 350°F)
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Max. Recommended |
Max. |
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Part Number |
Recommended |
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Velocity (FPS) |
Static Pressure |
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(psig) |
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AT-201 |
11 |
250 |
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AT-203 |
20 |
500 |
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AT-206 |
11 |
250 |
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AT-209 |
4 |
150 |
1.Install AT-206 bulb well into 1/2" FNPT opening.
2.Place packing (included with AT-206) over bulb support section and insert bulb into well.
2 |
© Copyright 2009 Schneider Electric All Rights Reserved. |
F-14684-5 |