Instruction/ maintenance manual of the product ML6421 Honeywell
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PRODUCT DATA 63-2515-4 ® U.S. Registered T rademark Copyright © 2002 Honeywell • All Rights Reserved ® ML6421, ML7421 Non-Spring Return Electric Linear Valve Actuators APPLICATION The ML64 21A,B .
ML6421, ML7421 NON-SPRING RETURN ELECTRIC LINEAR V ALVE ACTUATORS 63-2515—4 2 ORDERING INFORMATION When purc hasing re placement a nd mod ernizatio n product s from your TRADEL INE® wholes aler or dis tributor , refer to th e TRADELINE® Ca talog or price s heets for c omplete ordering nu mber .
ML6421, ML7421 NON-SPRING RETURN ELECTRIC LINEAR V ALVE ACTUATORS 3 63-2515—4 Fig. 1. A pproximate dimensi ons of ML64 21, ML742 1 Electric Linear V alve Actuator s in in. (mm ). INSTALLATI ON When Instal ling this Prod uct… 1. Read ins tructions carefully .
ML6421, ML7421 NON-SPRING RETURN ELECTRIC LINEAR V ALVE ACTUATORS 63-2515—4 4 Moun ting 1. Place th e actuator on the valve wit h the U-bo lt around the val ve colla r . Se e Fig. 2. IMPORT ANT When ti ghteni ng the set sc rews, fi rst tigh ten the right set scr ew .
ML6421, ML7421 NON-SPRING RETURN ELECTRIC LINEAR V ALVE ACTUATORS 5 63-2515—4 Fig. 5. ML6 421 typ ical wir ing diagra m. Fig. 6. ML7 421 typ ical wir ing diagra m. Fig. 7. M L7421 wirin g using volta ge input control and separate tra nsformers. Fig.
ML6421, ML7421 NON-SPRING RETURN ELECTRIC LINEAR V ALVE ACTUATORS 63-2515—4 6 OPERATION General The dr ive of the actuator s ynchrono us motor i s convert ed into the line ar motion of the actuator s tem by usin g a worm gear transmi ssion. A butt on retai ner clip connects the actua tor stem to the valv e stem.
ML6421, ML7421 NON-SPRING RETURN ELECTRIC LINEAR V ALVE ACTUATORS 7 63-2515—4 Actuator Override T o override the contr ol signal (for freeze protectio n or si milar applic ations), c onnect th e 24 V ac co mmon (T2) to either termina l O1 or O 2. Connecti ng to term inal O1 fully ext ends the actua tor stem.
63-2515 — 4 B . B . Re v . 1 -0 3 ww w . hone y well . c om Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. Automation and Control Solutions Honeywell International Honeywell Europe S.
An important point after buying a device Honeywell ML6421 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell ML6421 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 Honeywell ML6421 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell ML6421 you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell ML6421 will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell ML6421, 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 Honeywell ML6421.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell ML6421. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell ML6421 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
