HEP 25MBH Isolation Heat Exchanger Panel Dual Pump w/Timer

The main application of the HEP Isolation Heat Exchanger Panel with Timer is to provide single wall
isolation between a DHW tank and a heating system where a 24hr timer is required. This panel is not a
temperature control device; the secondary water temperature is dependent on the primary water
temperature.

The dual pump models are 2-zone panels.

The panel is pre-wired to work with an optional DHW priority switch which is mounted outside the panel.

A cover for these panels is sold separately.

Sequence of operation:

• When a thermostat calls for heat, its internal 24V contacts close, the auxiliary terminals close, and both pumps turn on.
• When the requirements of the thermostat are met, the internal contacts of the thermostat open, the auxiliary contacts open, and the pumps stop.
• Both the primary and secondary pumps are activated once every 24 hours, for 15 minutes, to ensure that potable water in the piping is not stagnant.
• If the optional DHW priority flow switch is installed and the DHW flow is above the factory setting for this device, the primary pump stops and the auxiliary contacts open. When the DHW flow drops below the factory setting the panel resumes normal operation.

California Proposition 65 WARNING