Use and Care Manual

28
How to use Control Panel - User mode
Chapter 3. – Unit Operation
8. Setting the ‘Recirculation System’.
You can choose from two pre-heating modes:
Internal Recirculation Mode or External Recirculation Mode. To select a recirculation mode, you must set from the ‘Installer Mode’
on the front control panel.(Refer to the page 30 )
When you use a recirculation mode, there will be some minor effi ciency loss, as a result of the water heater maintaining a steady
temperature within the recirculation loop.
With the recirculation operation, hot water will be automatically circulated in the hot water pipes. Even with this function activated,
it may take several minutes for hot water to be completely circulated through the plumbing system. Set the timer to activate the
recirculation system prior to the fi rst use of hot water to ensure hot water is available.
Recirculation timer setting can be changed to meet customer's desired schedule.
Auto (self learning mode) function can be selected by customer's need.
This mode is available without a
recirculation pipe installed. The
water heater is preheated and
protected from freezing
1. Internal Recirculation mode
Mode Description
Return
Line
Inst. Mode Setting
Hot
Water
Speed
Energy
Default
(Recirculation
Time)
Recirculation
Setting
Recirculation
Mode
Standard (Default)
Same as other
Tankless water heater
N/A OFF N/A Good Best -
Internal Recirculation
- page 28
Similar to tank water heater
without recirculation system
N/A ON Internal Better Better
5:00 ~ 8:00 AM
5:00 ~ 11:00 PM
External Recirculation
- page 27
Quicker hot water Required ON External Best Good