Installation; Wiring - Honeywell thm5421c Installation Manual

VisionPRO® IAQ Equipment Interface Module

Installation

1 Remove cover from Equipment Interface Module (EIM).
2 EIM can be mounted on equipment or on wall. Use included wall anchors for mounting onto
drywall (drill 3/16" holes for drywall; 7/32" holes for plaster).
CAUTION: This product may be damaged if mounted inside HVAC equipment. Install
only on the outside of HVAC equipment.

Wiring

Connect wires as shown below (see wiring guides on following pages).
69-1823EFS—05
LED
Restore power and check LED:
• LED blinks rapidly: Normal information
transfer.
• LED blinks once: Incoming message to EIM.
• LED blinks continuously: Wiring problem.
Check wiring to terminals 1, 2, 3.
• LED always off: Wiring problem. Check
wiring to terminals 1, 2, 3.
• LED always on: EIM may need replacement.
NOTE: It is normal for the LED to blink
continuously during startup, and while
checking equipment status (Auto
Discover mode).
2