Field Controls LS-140A installation instructions High Temperature Vent Limit Switch

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HIGH TEMPERATURE VENT LIMIT SWITCH

Models: LS-140A, LS-550A

Items Included:

1)

High temperature vent limit switch

1)

TCA-1 thermocouple junction block (LS-550A)

 

2)

2-1/2 to 5-1/2 inch hose clamps

1)

6 foot length of 12/2 wire (LS-550A)

 

1)

Tube of high temperature sealant

2)

Wire hold down clips (LS-550A)

 

4)

Wiring quick connect terminals (LS-140A)

1)

ROMEX connector

Installation of a High temperature vent limit switch is recommended for LP and Natural gas fired power vented and natural draft water heaters. This device is installed to limit the vent temperature in either plastic pipe (1400 F temperature limit) or B vent installations (5500 F temperature limit) caused by scaled up tanks and/or inadequate venting. Wiring MUST be in accordance with the National Electrical Code and applicable local codes.

The Field Controls High temperature vent limit switch MUST be installed by a qualified agency in accordance with the manufacturer’s installation instructions.

The definition of a qualified agency is: any individual, firm, corporation or company which either in person or through a representative is engaged in, and is responsible for, the installation and operation of gas appliances, who is experienced in such work, familiar with all the precautions required, and has complied with the requirements of the authority having jurisdiction.

Before and after adding this safety control on existing appliances, an installation inspection in accordance with the National Fuel Gas Code 54, Z223.1 Appendix H should be performed and a combustion analysis is recommended to determine the operating condition of the appliance.

CAUTION: Disconnect Electrical Power When Wiring High temperature vent limit switch

MODEL

P/N

CONTACT

LOAD RATING

LIMIT

RESET

SWITCH

APPLICATION

 

 

MATERIAL

AMPS

VOLTS

SETPOINT °F

TYPE

 

 

 

 

LS-140A

46564100

SILVER

15 A

120 AC

140

AUTOMATIC

SPDT

PLASTIC VENT APPLICATIONS

LS-550A

46564200

SILVER

15 A

120 AC

550

AUTOMATIC

SPDT

B-VENT APPLICATIONS

2630 Airport Road · Kinston, NC 28504

Phone: 252-522-3031· Fax: 252-522-0214

www.fieldcontrols.com

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Contents Items Included High Temperature Vent Limit SwitchWiring the LS-140A Limit switch Page Wiring the LS-550A Limit switch