Primary Loop Stations

• Consist of a pre-piped Primary loop to be used with Primary/Secondary piped hydronic systems.
• Available with specified port locations for both boiler and zone supply and returns. Piping sizes are available up to 2”.
• 1 or 2 primary circulators are available dependant upon application. Includes Spirovent, 12psi feed water regulator, dual check back flow preventer, and ½” connection for the expansion tank and make-up water supply.
• Can be coupled or grouped with other HPS Zone Control Stations to complete a simplified and professional looking boiler system.

PLS-1 Stations

Used for: Standard single primary pump applications with no priority pump requirement off of the primary loop.

PLS-2 Stations

Used for: 2 primary pump applications:

• 2nd pump is typically designed to work as a priority zone for an indirect water heater or other priority system.
• These panels are most commonly used with condensing boilers or control modules that utilize a priority (high temperature) primary loop over a general heating primary loop.

PSS Stations

• Consist of a pre-piped primary loop and the choice of 1 to 6 secondary zones
• 4 & 6 zone Electronic Relay Control Boards allow each zone to be set, supplying either high or low temperature output from a condensing boiler