Posted by Chris on June 12, 2001 at 07:49:43:
In Reply to: Re: Second McDonnel 157! Urgent!!!TARZAN!!! posted by Vern on June 12, 2001 at 07:34:21:
: : Having a second McDonnel Level control, is it mandatory
: : or matter of choice! And what it sposed to do?
: It usually acts as a secondary low water cutoff, frequently with
: a manual reset feature. As for mandatory or voluntary, I believe that
: depends on the laws of the state you are in.
Two low water cutouts are gernerally required and very good to have anyway. The primary is usually a McDonald Miller with a float and the secondary is generally probes inserted in to the drum. The secondary is usually a manual reset where the primary is generally a auto reset, but could also be a manual reset. Check with your jurisdiction to make sure of the codes in your area.
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