Instruction/ maintenance manual of the product Series 142 Watlow Electric
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Series 142 User ’ s Manual Safety High Limit or On-Off Heat Controller 1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota USA 55987-5580 Phone: +1 (507) 454-5300, Fax: +1 (507) 452-4507, Internet: http://www.watlow.com The Watlow Series 142 Safety Limit is a compact, environmentally protected safety limit or temperature controller.
2 ■ User’s Manual Watlow Series 142 Figure 2a — Series 142 dimensions. Installation Procedure 1. Drill two 5mm (0.187 in.) diameter holes in the desired panel location. 2. Mount the unit with two 6-32 screws, 6mm (0.25 in.) hex nut and #6 internal tooth lock washer.
Watlow Series 142 User’s Manual ■ 3 NOTE: All terminals are 4mm (1/4 in.) quick connects. Figure 3a — 120V~ power wiring (142A - _ _ _ _ - 1 _ 00). Figure 3b — 208/240V~ power wiring (142A - _ _ _ _ - 2 _ 00). Figure 3c — Reset switch. NOTE: Jumpering the reset terminals does not convert from limit to an on-off control mode.
4 ■ User’s Manual Watlow Series 142 Figure 4 — System wiring example. ∫ WARNING: Install high or low temperature limit control protection in sys- tems where an overtemperature fault condition could present a fire hazard or other hazard.
Watlow Series 142 User’s Manual ■ 5 (2072) Limit Control Mode • High limit control • Latched manual reset with ±1.7 ° C (3 ° F) hysteresis • Can only be reset when process temperature drops below limit set point. Terminals are provided for remote reset in the event of an overtemperature condition.
6 ■ User’s Manual Watlow Series 142 (2071) To order, complete the code number to the right with the information below: 1 4 2 A - _ _ _ _ - _ _ 0 0 Series 142 = Temperature safety limit, limit, lat.
Jim Boigenzahn Winona, Minnesota, USA Name of Authorized Representative Place of Issue General Manager December 2001 Title of Authorized Representative Date of Issue Signature of Authorized Representa.
8 ■ User’s Manual Watlow Series 142 automatic power reset — A feature in latching limit controllers that does not recognize power outage as a limit condition. When power is restored, the output is re-ener- gized automatically, as long as the temperature is within limits.
An important point after buying a device Watlow Electric Series 142 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Watlow Electric Series 142 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Watlow Electric Series 142 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Watlow Electric Series 142 you will learn all the available features of the product, as well as information on its operation. The information that you get Watlow Electric Series 142 will certainly help you make a decision on the purchase.
If you already are a holder of Watlow Electric Series 142, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Watlow Electric Series 142.
However, one of the most important roles played by the user manual is to help in solving problems with Watlow Electric Series 142. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Watlow Electric Series 142 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
