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Rinnai Corporation Hydronic Air Handler 101 Training Manual
Domestic Hot Water Priority
The Rinnai Hydronic Air Handler includes* a domestic hot water priority flow sensor that
will determine when to shut down and re-direct all the water heater’s output to whichever
fixture and or appliances that are calling for hot water. This feature will turn off the pump
to prevent cold air from blowing into the structure and excessive wear on the internal
pump components.
* The flow sensor is to be installed at the site
–Four models covering nominal heating sizes from 45,000 to 90,000 BTU/hour
–Multi-position (upflow, downflow, horizontal left, horizontal right)
• Modifiable for side-entry return air
• NOTE: the unit is not designed to be installed on its back.
–Low-flow, high-head pump designed to work with Rinnai’s tankless water heaters
–No combustion air infiltration losses when used with a Rinnai tankless water heater
–Four selectable heat blower-off delay times – adjustable fan speeds provide
operational efficiency of heat distribution with 30, 60, 90 and 120 second blower
off settings
–Multi-speed motor
•800 – 1600 Nominal Heating Airflow (CFM)
•Adjustable to meet the needs of the heating and cooling CFM blower
requirements
–Strong steel cabinet
•Pre-painted galvanized steel
Features
AH45 AH60 AH75 AH90
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