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Posted by HeatPro on January 21, 2006 at 11:23:05:
In Reply to: Re: The plot thickens... posted by Dave on January 21, 2006 at 08:23:32:
: I spoke with Lochinvar tech guys who wanted me to wire it across R/W.
+++ I'd listen to Lochinvar. they might know if tripping the high limit also trips the alarm or not on that module. The high limit wires in the diagram are R/OR and R/BK (not R/White) but that is just wire to the factory and they might not use the same color every time, depending on their availability. On the diagram the R/White goes from the R2 terminal to the molex connector and kills 24 volts to the ignition module and gas valves.
The alarm set also seems to be an optional feature, so you might not have them and as the effect would be moot, there would not be a worry about the alarms if they aren't there. If the alarms won't come on when doing as the Beckett company says, then removing the high limit R/OR to put the Heatmanager between is as the Beckett factory says.
The residential HeatManager control expects that boiler pumps would run when the high limit shuts the burner down, as it normally affects only the burner circuit through the high limit. It is good practice to ask the factory. Removing the 24 volt electricity to the ignition module should stop the whole heat call except from the pump; so removing the R/W wire from the R2 wire leading to the CN1-3 terminal of the molex on the ignition board to insert the Heatmanager there would kill the 24 v power to the ignition module and both gas valves through the Heatmanager(, which would also prevent alarms from sounding if they are installed.)