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Honeywell ML7421 manual

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Table of contents for the manual

  • Page 1

    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 Non -Spring Return Electric L inear V alve Actuat ors are su itable for use with low-vo ltage, sin gle-pole double-th row (spdt ), Series 60 two-posit[...]

  • Page 2

    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 . If you hav e additi onal ques tions, ne ed further[...]

  • Page 3

    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 . Failure to fol low them c ould damage the produc t or ca use a haz ardous cond ition. 2[...]

  • Page 4

    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 . Se e Fig. 2. 2. Place the U -bolt agai nst the valv e colla r and secure the act[...]

  • Page 5

    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. 8. ML7 421 wiring using voltage input co ntrol and a common tr ansformer . Fig. 9. R eplacing a ct[...]

  • Page 6

    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. The i nter nal forc e sens or , us[...]

  • Page 7

    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. Con necting to O2 ful ly retracts the [...]

  • Page 8

    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.A. Honeywell Latin American Honeywell Honeywell Limited-Honeywell Limitée Control Products 3 Avenue du Bourget Region 1985 [...]