Secondary Winter Heating
Uses Mode #1: ERV Flow at Reduced Speed. Water‐Side Economizer Geothermal Heat Pump Option.
These operations basically allow more OA with lower air temperatures to go directly to space at warmer temperatures without using the heat pump to achieve it.
Uses Mode #1: ERV Flow at Reduced Speed. Water‐Side Economizer Geothermal Heat Pump Option.
These operations basically allow more OA with lower air temperatures to go directly to space at warmer temperatures without using the heat pump to achieve it.
OPEN
• Outside Air Louver • Bypass Valve for 100% bypass CLOSE • Recirculated Damper because this warmer yet stale return air is not needed to bring up the air temperature (the geothermal water temperature mixed with outside air will suffice) |
If Loop Water Temp. < Precooling Coil Air Temp.
• DO NOT use this method. Well water would provide unwanted post cooling. If Loop Water Temp. > Precooling Coil Air Temp., then OPEN • Hot Water Valve to provide extra heating in reheat coil, thus allowing 100% OA at 40 F to be heated to about 55F to supply to space |