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Posted by mark on March 07, 2005 at 15:03:34:
In Reply to: Aquastat confusion posted by Rick on March 05, 2005 at 21:25:38:
: Hi
: One Honeywell L6006C is strapped-on to the outside copper pipe immediately above the boiler and L4006A installed in the boiler. Don't know exactly how wiring goes, but wire off L6006C goes inside of L4006A whose wire connects to the control panel.
: Temperatures set:
: L6006C= high at 200F with differential at 5F
: L4006A= high at 175F with differential of 15F
: Right now, my boiler stops at water temp of 175F and comes back on at 160F which is following L4006A. And cirulator keeps on running even boiler is not running as long as there's call for heat from any thermostats in the house.
: My question is why I need 2 aquastats to my boiler?
Yes, you need two, the second is a backup in case the first fails. the "a" means automatic reset. the second one will not reset until the operator resets it.