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Argo 20KW electric boiler

GrantGrant Posts: 1Member
I installed a new argo boiler and the electrical/control work was completed last Tuesday (Dec4). There is a total of about 40 feet of 1" copper pipe in the system. It is a hydro air system, with 2 zones (upstairs and downstairs)--each with their own tstats.

When a tstat calls for heat, the fan comes on, then the circ pump, then the elements themselves. The boiler specs indicate that the elements (4) will energize one at a time at 30 second intervals to bring the boiler to set point (160 degrees). If the heat demand is not satisfied, the boiler will energize only the # of elements required to maintain setpoint temp.

Here's what actually happens:
1. pump comes on and the 1st element comes on shortly after (30sec). The second and 3rd element come on at approx. 1.5 minute intervals. The 4th element will come on at approx. 14 minutes. Usually the tstat is satisfied before the boiler comes up to 160 degrees--at approx. 23 min. Elements shut off and the pump runs for approx 3 minutes before shutdown.

2. While testing the system, I turned the 2nd. tsat up about 5 minutes after the first one had been satisfied. The blower came on immediately. As the boiler temp drops, the 1st. element comes on - and that's it! Soon the boiler temp is
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