Rheem RTGH-RH10DV Service Manual page 45

Chapter 3 How to Use The Control Panel
Index Default
12:Cn oFF
13:Eh on
14:T1 oFF
15:T2 oFF
Table 26 – Installer Mode Descriptions
Toggle through displayed items by turning the dial
Displayed items can be changed by turning the dial
displayed value.
To save settings, press the Dial button
To leave Installer Mode, press button
▪ H. USING RECIRCULATION MODES – STEP 1
The following section explains and details the use of the Internal / External Recirculation Modes.
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 heater – 24 hours a
day, 7 days a week. The differential setting can be adjusted to control the temperature set point.
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.
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 externally. The installer may program specific recirculation functions by day
and time to circulate and heat water when the user most needs hot water. See Recirculation Functions, this
manual, for details.
To set Recirculation Modes:
1. Installer Mode will activate when
is powered Off.
2. Turn the dial to 6:RC. Press the Dial button
changed.
3. Turn the dial to "oFF" to turn off the Recirculation Pump, or "on" to turn the Recirculation Pump on.
Press the dial button
Figure 39 –6:RC - Recirculation Pump Operation
Parameter
Cascade
Common Vent
Used to test the water heater when operating in Internal Recirculation Mode only.
Test Mode 1
Used to purge air from the water heating system with an external recirculation
Test Mode 2
The water heater does not need to operate while Test Mode 2 is operating.
again.
again. The water heater will return to power off mode.
is pressed and held for five seconds while the water heater display
. "oFF" will flash when the 6:RC setting is ready to be
to select the setting and return to the Installer Mode.
Description
Enables Cascade Mode on the water heater.
Range: on – Cascade is used, oFF – Cascade is not used
NOTE: 12:Cn must be set to On to select 13:Eh
Enables Common Venting on the water heater.
Range: on – Common Venting is used,
oFF – Common Venting is not used
The water heater may operate while Test Mode 2 is operating.
Range: on, oFF
pump.
Range: on, oFF
. To change an item, press the Dial button
counterclockwise to lower, and clockwise to raise, the
45
.