Schneider Electric TK-6024, TK-6124, TK-8024, TK-8124 Data Sheet

TK-6024, TK-6124, TK-8024,

TK-8124

Pneumatic Bulb Thermostats

General Instructions

APPLICATION

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.

SPECIFICATIONS

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
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
	requires AT-209
AT-203	3/8" x 9-1/2" with 3/4" MNPT stainless steel bulb
	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)

MAINTENANCE PARTS

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

Figure-1 Piping Connections.

Table-1 Specifications.

				Bulb
	Part Number	Action	Style	Dimensions
				in (mm)
	TK-6024		Straight	3/8 x 4-5/8
		DAa		(9.5 x 117)
	TK-8024		Averaging	3/32 x 8’
				(2.4 x 2.4 m)
	TK-6124		Straight	3/8 x 4-5/8
		RAa		(9.5 x 117)
	TK-8124		Averaging	3/32 x 8’
				(2.4 x 2.4 m)

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

PRE-INSTALLATION

Inspection

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.

Required Installation Items

•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)

INSTALLATION

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.

Figure-2 Mounting Dimensions.

THERMOSTAT MOUNTING

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.

BULB MOUNTING

Table-2 Liquid Line and Tank for TK-6X24.

	Part Number	Description	Mt. Fitting	Insertion
				Size
	AT-201a	Copper bulb well		1/2" dia.
	AT-203a	Stainless steel bulb	3/4" MNPT	OD (9-1/2”
		well		long
				1/2" dia.
	AT-206	Copper bulb well	1/2" MNPT	OD 4-1/2"
				long
	AT-209b	Bulb mounting kit	3/4" MNPT	Length of
				bulb

aRequires AT-208.

bRecommended installation is with a bulb well.

Figure-3 Bulb Well Installation.

Table-3 Application Limitations at 250°F Fluid Temp.

(Max. 350°F)

		Max. Recommended	Max.
	Part Number		Recommended
		Velocity (FPS)	Static Pressure
			(psig)
	AT-201	11	250
	AT-203	20	500
	AT-206	11	250
	AT-209	4	150

Installation of TK-6X24 Bulb into AT-206 Bulb Well

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.

3.Push packing into nut on well using a screwdriver.

2

© Copyright 2009 Schneider Electric All Rights Reserved.

F-14684-5