Rheem RTGH-RH11DV Use And Care Manual page 45

Figure 24.1 – Standard(DHW) Mode
Figure 24.3 – Preheat or Inernal Recirculation Mode
Internal Recirculation Mode allows the installer to program specific recirculation functions by day and time to circulate and heat water
more efficiently - when the user most needs hot water. See Recirculation Functions, this manual, for details.
Mode Description
Same as Standard Tankless
Standard
(Default) Water Heater
Internal Similar to Tank Water Heater
Recirculation without Recirculation Loop
External Quicker Hot Water with
Recirculation External Recirculation Loop
Table 20 – Detail of Recirculation Modes
* Cross-over kit is available for installations where dedicated return lines are not available.
Standard (DHW)
Mode – This is the
operating mode
when there is a call
for hot water.
Figure 24.2 – External Recirculation Mode
Installer Mode Setting
Return
Recirculation
Line
Setting
(6:RC)
N/A OFF
N/A ON
Required ON
Preheat or Internal Recirculation Modes – When
calls for hot water are satisfied, the water heater is
factory programmed to Preheat and automatically
maintain the temperature set point of the water heat-
er – 24 hours a day, 7 days a week. The differential
setting can be adjusted to control the temperature
set point.
Hot Water
Speed
Recirculation
(To
Mode
Fixtures)
(7:RM)
N/A Good
Internal Better
External Best
External Recirculation
Mode – This mode keeps
an external recirculation
loop warm to make hot
water production more
efficient and also aid in
freeze protection. An
external recirculation line
must be installed in order
to recirculate water exter-
nally. The installer may
program specific recircula-
tion functions by day and
time to circulate and heat
water when the user most
needs hot water. See Re-
circulation Functions, this
manual, for details.
Default
Energy
Recirculation
Usage
Run Time
Best -
Better
5:00 ~ 8:00 AM
5:00 ~ 11:00 PM
Good
AP18733 REV. 3.2.17
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