JOHNSON CONTROLS
30
FORM 102.20-OM2
ISSUE DATE: 6/01/2015
SECTION 2 - START-UP AND OPERATION
FIGURE 22 -
HORIZONTAL WHEEL FOR OUTDOOR AHU
LD09641a
Elevation View
Plan (Top) View
Supply Fan
Supply Fan
Cooling
Coil
Cooling
Coil
Heating
Coil
Heating
Coil
Filter
Filter
Access
Access
Engery
Wheel
Engery
Wheel
O/A Damper
Return Air
Return Air
R/A Damper
O/A
Bypass
E/A Bypass
O/A Damper
Exhaust Fan
Exhaust Fan
When the AHU is operating normally or
temporarily, the energy recovery wheel
must rotate to prevent clogging.
Many energy recovery wheels are sus-
ceptible to damage if the AHU reaches a
maximum temperature, which can occur
if the heating valve remains open when the
AHU is off. The maximum temperatures
across energy recovery wheels:
1. Thermotech - 140°F
2. Innergy Tech - 122°F
3. NovelAire
®
Technologies - 200°F
4. Airxchange
®
- 170°F