[an error occurred while processing this directive]
Posted by HeatPro on September 08, 2004 at 15:00:34:
In Reply to: Re: Modulated output for multiple heating types posted by Dave on September 08, 2004 at 11:17:59:
: That's exactly my question - will the modulation provide lower temperature water when the radiant zone calls for it, or does this type of boiler always produce the same temperature of water, but just in different "amounts" (loads), depending on the circulator rate?
*** You are confused about the function of a boiler and selection of controls for that boiler. A boiler can make any temperature of water from room temperature to the pressure the releif valve permits. It is the controls that tell the burner to fire or not.
All in-floor radiant systems use lower temperature water than hydronic baseboard systems;
*** Yhat is not true. Some under-floor radiant tubing is suspended below the floor and can use the same temperatures as baseboard.
however, since ours is a under-floor system, it probably requires a higher temperature than some.
*** You can see than, that this might or might not apply. Therefore, my statement here still applies to this situation:
: : Modulated output is not needed, but a control arrangement to reduce the water temperature for the radiant portion could be necessary, if that is the kind of radiant installation that uses lower temperatures. As you did not say, and might not know what temperature is required for the radiant, a definite statement can not be provided.
Post a Followup