28 Installing the Water Heater
3.4.3 Adjusting the Recirculation
Parameters
Entering the R&D Information Menu
Follow the instructions below to enter the R&D
information menu.
1. On the Front panel, press the Power button to
turn off the water heater.
2. Enter the R&D information menu by pressing
the Up (+) button three times, the Down (-)
button three times, and then the Up (+) button
four more times.
3. In the R&D information menu, use the Up (+) or
Down (-) buttons to move to 2.PAR (Parameter
information mode), and then press the Info
button.
No. Mode
Display
1
Technical Information
2
Parameter Information
4. To return to the previous menu (R&D
information menu), press the [Reset] button
once.
Items Name
Description
Display
12. P12
Pump Cycle
Interval
Set the
maximum
time for pump
operation or
on-demand
operation.
14. P14
Pump
Sampling
Time
Set the pump
cycle ON
interval.
15. P15
Differential
OFF Temp
Set the offset
temperature
to turn off the
preheating
operation
(function
disabled with
HotButton Kit).
9. Turn on the switch beside the front panel.
10. Put the water heater cover back on and secure it
with the 4 screws.
Gas
Domestic Cold Water
Domestic
Hot Water
Domestic
Recirculation
Return
Recirculation Using External Pump Only
