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ACCESSORIES air / oil heat exchangers

ELECTRICAL TEMPERATURE CONTROLLER WITH BULB WELL ASSEMBLY (for Air/Oil Coolers) SPECIFICATIONS: A) Material: Stainless Steel B) Power Limits: 1)For three phase motor operation, use only with a magnetic starter, 125 VA max. (VA =volts x amps) 2)For pilot duty, 125 VA max. Part Number Description 310-4011 (old part number 310-4001) TC-511 with 6-Foot Capallary Tube & Bulb Well

310-4002

TC-511 with 20-Foot Capallary Tube & Bulb Well

120v AC/8.0 amps max 230v AC/5.1 amps max 277v AC/4.2 amps max 460v AC/2.0 amps max 3)Temperature operating range: -40°F to 212°F. APPLICATIONS (Temperature Controller)

310-2025 (old part number 310-2005)

Replacement Bulb Well TC-511

The A421 Series Electronic Temperature Controls are single-stage, electronic temperature controls with a single-pole, double-throw (SPDT) output relay. A421 controls feature a backlit LCD with adjustable brightness and three-button touchpad interface that can be set up to restrict user adjustments. An LED indicates the output relay's On/Off status. A421 controls have simple On and Off temperature settings for heating or cooling, an adjustable anti-short cycle delay, temperature setback, and sensor offset capability.

INSTALLATION When installing this product:

1. Read instructions carefully. Failure to follow the instructions could damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. 3. Installer must be a trained, experienced service technician. 4. After installation is complete, check out product operation as provided in the instructions.

3/4 (19)

3/16 (5)

2-15/32

(63)

5/8 (16)

ELECTRICAL RATINGS: See Installation Instruction Manual

(127) 5

2-15/16 (75)

Insulation of boiler or storage tank

Wall or boiler or storage tank

Spud screws into tapping (reducer fitting may be necessary to adapt spud to tapping)

(102) 4

Immersion Wall

Sensing Bulb

Capillary tubing

1-1/2 (38)

(62) 2-7/16

1-1/2 (38)

Sensor

1/2"-14 external threads on spud

(63) 7-1/2

Tube Clip & rubber gromet

1/4 (6)

(50)

(22) 7/8

LOCATION AND MOUNTING. Observe the following guidelines when locating and mounting an A421 control: • Ensure that the mounting surface can support the control, DIN rail, mounting hardware, and any (user-supplied) panel or enclosure. • Mount the control in a vertical, upright orientation wherever possible. DIN rail mounting is strongly recommended for Type 1 controls. • In direct-mount applications, mount the control on a fat and even surface. Mount the control in a location free of corrosive vapors and observe the ambient operating conditions listed in Technical Specifications for both the A421 control and the A99 sensor. • Allow sufficient space for connecting and routing wires, viewing the LCD, and using the touchpad. • Do not mount the control on surfaces that are prone to vibration or in a location where high-voltage relays, motor starters, other sources of electromagnetic emissions, or strong radio frequency may cause interference. • Do not install the control in an airtight enclosure. • Do not install heat generating devices with the control in an enclosure that may cause the ambient temperature to exceed 150°F (66°C).

(22) 7/8

Sensing Bulb

Screws into tapping in boiler or tank

1/2"-14 External threads on spud

OPERATION See Installation Instruction Manual

note: AIHTI reserves the right to make reasonable design changes without notice.

274

355 American Industrial Drive LaCrosse, VA 23950

tel: 434-757-1800

fax: 434-757-1810

email: sales@aihti.com

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