The type and power of components required to accomplish a successful control system installation is best driven by the sequence of operation itself. Historically, specified sequences of operation have been woefully inadequate. There has been an accepted standard among virtually all specifying engineers to tolerate almost ridiculous grammatical errors, contradictory terminology, inappropriate, neglected, and completely omitted sequences, etc. back to top Confusion, caused by manufacturer's product-centered specifications has propagated a learned ignorance among specifying engineers for proper specification of sequence. Every facility design has a spirit and intend. There is a vision of the finished product shared by the architects, engineers, and owners.
Contractors try to satisfy that vision with as little time and money as possible.
Most engineers seem to have no problem sizing heating and cooling equipment, VAV boxes, packaged units, pumps, etc. Very seldom do facility designs reach the construction stage without properly sized equipment. When the controls are specified inadequately, the typical competition among contractors drives them to take advantage of shortcomings in specifications to reduce their bids and win more work. The customer, unfortunately, ends up with less than they wanted. PureZone knows how to specify HVAC, Control Systems, and sequences of operation in a manner which limits or eliminates miscommunication among the involved parties.