The intelligent choice for
multiple boiler control.
Antiquated control methodologies traditionally used for boiler systems do not take advantage of condensing technology and therefore limit system efficiencies. ModSync is a new kind of boiler sequencing system with updated control philosophies and a user-friendly interface, designed to take advantage of condensing technology.
Advancements in condensing boiler technology have allowed for significant efficiency increases with hydronic heating systems. Most condensing boiler installations incorporate multiple boilers to further increase efficiencies and provide redundancy. The key to maximizing these efficiencies is the ModSync sequencing system.
Boiler Staging Logic
ModSync has been designed for use with multiple condensing boilers to maximize the efficiency of the hydronic system. ModSync boiler staging logic is unique to the condensing controls market.
- ModSync monitors outdoor temperature and calculates a hydronic loop setpoint.
- A control variable proportional to the heat requirements of the hydronic loop is calculated. This variable is used to determine the exact number of boilers and their associated firing rates required to meet the load demand.
- Whenever multiple boilers are operating, ModSync uses a parallel modulation method. Boiler stages are modulated simultaneously at the lowest firing rate possible to maintain system efficiency.
- As the hydronic loop temperature increases, ModSync will begin to decrease the firing rate of the hydronic boilers. If all of the hydronic boilers are at low fire, ModSync will begin to stage the boilers off. The hydronic boilers will continue to be disabled based on the temperature rise and control variable response.
Condensing Efficiencies
Condensing boiler efficiency is based on two main determining factors: the temperature of the water returning from the system and the BTU firing rate output of the boiler. Increased efficiencies are gained with colder return water temperatures and minimum firing rate levels.