AquaStar 125BL Indirect Water Heating Application
An application note describing how AquaStar 125BL Indirect Water Heating Application is used in practice.
Volume Indirect Water Heating for Residential & Commercial. Applications
The AquaStar Tankless Water Heater - Model 125BL can be used as an indirect water heater in conjunction with a storage tank for high volume situations. The Storage tank should be 30 gallons or larger. The standby losses that are associated typical gas water heaters are eliminated because there is no flue dumping the stored heat out of the storage tank. Recovery time can be over 4 times faster than a typical gas water heater due to the high recovery rate of the AquaStar. Efficiency is also maintained over time, which is not the case with a storage tank water heaters. The circulator is constantly flushing the heat exchanger in the AquaStar clean. You can use a typical electric tank water heater for the storage tank - you disconnect the heating elements and use the lower aquastat to activate the circulator relay to turn the circulator so when the tank's aquastat calls for hot water - it activates the circulator that will pump water from the tank to the AquaStar 125BL tankless water heater and then back to the tank. You can use different size tanks to accommodate up to 5 bathrooms or more. Also - if you want to use this in an open loop heating system - you can heat your radiant floors with this also as show with the optional domestic hot water recirculating line. sells all the components needed for this system.
Components for an Indirect Water Heating System
You must use bronze parts for an all open loop systems.
Please Note You should obtain the electric hot water storage tank from a local source as the cost to ship one of these is generally more than the cost of tank it self.
Components for an Open Loop Heating System
The heat exchanger will be feed from the storage tank and the back side of the heat exchanger will feed your hydronic or radiant heat system. This way - you can keep the potable water and heating system separate. We sell a flat plate heat exchanger for this system. If you intend to run a closed loop heating circuit off a 125 BL Indirect Water Heating System you need a heat exchanger. Below is the link to the Flat Plate Heat Exchanger page.