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Dodge Engineering & Controls, Inc.
Toll Free (877) 334-2875
EN221 and EN310 Non-Spring Return Electronic Actuator
Installation Guide
General Installation ..................................................................................................EAI/EN – 1
Mounting...................................................................................................................EAI/EN – 1-3
Manual Override .......................................................................................................EAI/EN – 4
Mechanical Range Adjustment.................................................................................EAI/EN – 4-5
Mounting for NEMA 2 ...............................................................................................EAI/EN – 5
Dual Auxiliary Switch (-S option) ..............................................................................EAI/EN – 5-6
Zero Span Control Signal Adjustment (-ZS option)..................................................EAI/EN – 6-7
Wiring........................................................................................................................EAI/EN – 7
General ..............................................................................................................EAI/EN – 7
Transformer........................................................................................................EAI/EN – 8
Three-Position (Floating) Control (24 VAC).......................................................EAI/EN – 8
Modulating Control (24 VAC).............................................................................EAI/EN – 8
Start-up/Commissioning ...........................................................................................EAI/EN – 9
Three-Position (Floating) Control (24 VAC).......................................................EAI/EN – 9
Modulating Control (24 VAC).............................................................................EAI/EN – 10
Actuator Dimensions ................................................................................................EAI/EN – 11-12
Actuator Sizing for Dampers.....................................................................................EAI/EN – 13
Accessories ..............................................................................................................EAI/EN – 14-15
Item Number 129-272-05, Rev. 010
196 Riverneck Road, Chelmsford, MA 01824 Tel: (978)-244-1200 Fax: (978) 244-1422