![background image](http://html2.mh-extra.com/html/daikin/rebel-dps-series/rebel-dps-series_installation-and-maintenance-manual_5691598084.webp)
IM-1125-13 • REBEL ROOFTOPS
84
www.DaikinApplied.com
Optional Energy Recovery Wheel
CORE
®
Construction
Your Daikin enthalpy heat exchanger is delivered completed
assembled and ready to run. The core is built to provide
many years of trouble free service with minimal maintenance
following proper installation and commissioning.
Figure 86: Enthalpy CORE with Outdoor Air Bypass
Frost Protection Option
During extremely cold winter conditions, the bypass is opened
on the outdoor air side of the core. This minimizes the cold
air across the core allowing the warm exhaust air to warm the
heat exchanger and prevent the accumulation of frost build up
on the unit. This is internally controlled with the MicroTech III
controller
Figure 87: Enthalpy CORE Frost Region
Defrost Control
With this method the enthalpy core’s outdoor air is bypassed
around the heat exchanger periodically for a defrost time
duration when the outdoor air temperature is below an outdoor
frost temperature threshold setpoint.
Cleanable Core
The heat exchanger can be accessed from the side access
doors. The exchanger is water washable and can be cleaned
in-place or easily slid out along the built-in track for better
access to the opposite end of the CORE. It is important to
wash the CORE at least once a year using tap water and mild
detergent.
1 .
Do not use a high-pressure water source
2 .
If the CORE is heavily soiled, prepare a solution of less
than 1:100 parts water to mild detergent. Otherwise
clean water will suffice.
3 .
It is suggested to clean the COREs in the vertical
orientation external to the unit, but not required.
Verification of adequate draining is required prior to
washing
4 .
Rinse until the presence to dirt and detergent is no
longer present.
5 .
Allow the plates to dry.
Unit cleaners that are acceptable and not acceptable to come
in contact with CORE.
Table 34: Cleaner Recommendations
Cleaner
Recommendation
Viper Expanding Foam
OK
CalSpray–nu-Brite
Avoid Contact
CalSpray–evap foam
OK
HD CalClean 1:40
OK
HD CalClean 1:5
Avoid Contact
Fantastik w/ Bleach
Avoid Contact
Fantastik Original
Avoid Contact